update tests

Bump @octokit/request-error from 2.1.0 to 5.0.1
Bumps [@octokit/request-error](https://github.com/octokit/request-error.js) from 2.1.0 to 5.0.1. - [Release notes](https://github.com/octokit/request-error.js/releases) - [Commits](https://github.com/octokit/request-error.js/compare/v2.1.0...v5.0.1) --- updated-dependencies: - dependency-name: "@octokit/request-error" dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com>
2023-10-09 11:23:53 +02:00 · 2023-09-25 01:31:40 +00:00 · 2023-09-18 14:42:50 -05:00 · 2023-09-18 19:41:12 +00:00 · 2023-09-18 14:39:13 -05:00 · 2023-09-18 01:47:43 +00:00
37 changed files with 13939 additions and 12046 deletions
@@ -21,7 +21,7 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4

      - name: Set Node.js 18.x
        uses: actions/setup-node@v3
@@ -14,7 +14,7 @@ jobs:
  test:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
      - uses: actions/setup-node@v3
        with:
          node-version: 18
@@ -27,7 +27,7 @@ jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
      - uses: actions/setup-node@v3
        with:
          node-version: 18
@@ -9,6 +9,6 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: 'Checkout Repository'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
      - name: Dependency Review
        uses: actions/dependency-review-action@main
@@ -100,3 +100,5 @@ Thumbs.db
 # Ignore built ts files
 __tests__/runner/*
 lib/**/*
+
+tmp
@@ -79,7 +79,7 @@ Here are a few things you can do that will increase the likelihood of your pull

 - Write tests.
 - Keep your change as focused as possible. If there are multiple changes you would like to make that are not dependent upon each other, consider submitting them as separate pull requests.
- Write a [good commit message](http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html).
+- Write a [good commit message](https://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html).

 ## Cutting a new release

@@ -1,7 +1,7 @@
 # dependency-review-action

 This action scans your pull requests for dependency changes, and will
-raise an error if any vulnerabilities or invalid licenses are being introduced. The action is supported by an [API endpoint](https://docs.github.com/en/rest/reference/dependency-graph#dependency-review) that diffs the dependencies between any two revisions.
+raise an error if any vulnerabilities or invalid licenses are being introduced. The action is supported by an [API endpoint](https://docs.github.com/en/rest/reference/dependency-graph#dependency-review) that diffs the dependencies between any two revisions on your default branch.

 The action is available for all public repositories, as well as private repositories that have GitHub Advanced Security licensed.

@@ -43,7 +43,7 @@ This action is available in Enterprise Server starting with version 3.6. Make su
 Security](https://docs.github.com/en/enterprise-server@3.6/admin/code-security/managing-github-advanced-security-for-your-enterprise/enabling-github-advanced-security-for-your-enterprise)
 and [GitHub
 Connect](https://docs.github.com/en/enterprise-server@3.6/admin/github-actions/managing-access-to-actions-from-githubcom/enabling-automatic-access-to-githubcom-actions-using-github-connect)
-are enabled.
+are enabled, and that you have installed the [dependency-review-action](https://github.com/actions/dependency-review-action) on the server.

 You can use the same workflow as above, replacing the `runs-on` value
 with the label of any of your runners (the default label
@@ -66,25 +66,30 @@ jobs:

 Configure this action by either inlining these options in your workflow file, or by using an external configuration file. All configuration options are optional.

-| Option                | Usage                                                                                                                                                                             | Possible values                                                                          | Default value |
-|-----------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------|---------------|
-| `fail-on-severity`    | Defines the threshold for the level of severity. The action will fail on any pull requests that introduce vulnerabilities of the specified severity level or higher.              | `low`, `moderate`, `high`, `critical`                                                    | `low`         |
-| `allow-licenses`*     | Contains a list of allowed licenses. The action will fail on pull requests that introduce dependencies with licenses that do not match the list.                                  | Any [SPDX-compliant identifier(s)](https://spdx.org/licenses/) | none          |
-| `deny-licenses`*      | Contains a list of prohibited licenses. The action will fail on pull requests that introduce dependencies with licenses that match the list.                                      | Any [SPDX-compliant identifier(s)](https://spdx.org/licenses/) | none          |
-| `fail-on-scopes`†      | Contains a list of strings of the build environments you want to support. The action will fail on pull requests that introduce vulnerabilities in the scopes that match the list. |`runtime`, `development`, `unknown`                                                      | `runtime`     |
-| `allow-ghsas`         | Contains a list of GitHub Advisory Database IDs that can be skipped during detection.                                                                                             | Any GHSAs from the [GitHub Advisory Database](https://github.com/advisories)             | none          |
-| `license-check`       | Enable or disable the license check performed by the action.                                                                                                                                | `true`, `false`                                                                          | `true`       |
-| `vulnerability-check` | Enable or disable the vulnerability check performed by the action.                                                                                                                          | `true`, `false`                                                                          | `true`       |
-| `base-ref`/`head-ref` | Provide custom git references for the git base/head when performing the comparison check. This is only used for event types other than `pull_request` and `pull_request_target`.  | Any valid git ref(s) in your project                                                     | none          |
+| Option                                 | Usage                                                                                                                                                                             | Possible values                                                                                              | Default value |
+| -------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------ | ------------- |
+| `fail-on-severity`                     | Defines the threshold for the level of severity. The action will fail on any pull requests that introduce vulnerabilities of the specified severity level or higher.              | `low`, `moderate`, `high`, `critical`                                                                        | `low`         |
+| `allow-licenses`\*                     | Contains a list of allowed licenses. The action will fail on pull requests that introduce dependencies with licenses that do not match the list.                                  | Any [SPDX-compliant identifier(s)](https://spdx.org/licenses/)                                               | none          |
+| `deny-licenses`\*                      | Contains a list of prohibited licenses. The action will fail on pull requests that introduce dependencies with licenses that match the list.                                      | Any [SPDX-compliant identifier(s)](https://spdx.org/licenses/)                                               | none          |
+| `fail-on-scopes`†                      | Contains a list of strings of the build environments you want to support. The action will fail on pull requests that introduce vulnerabilities in the scopes that match the list. | `runtime`, `development`, `unknown`                                                                          | `runtime`     |
+| `allow-ghsas`                          | Contains a list of GitHub Advisory Database IDs that can be skipped during detection.                                                                                             | Any GHSAs from the [GitHub Advisory Database](https://github.com/advisories)                                 | none          |
+| `license-check`                        | Enable or disable the license check performed by the action.                                                                                                                      | `true`, `false`                                                                                              | `true`        |
+| `vulnerability-check`                  | Enable or disable the vulnerability check performed by the action.                                                                                                                | `true`, `false`                                                                                              | `true`        |
+| `allow-dependencies-licenses`\*        | Contains a list of packages that will be excluded from license checks.                                                                                                            | Any package(s) in [purl](https://github.com/package-url/purl-spec) format                                    | none          |
+| `base-ref`/`head-ref`                  | Provide custom git references for the git base/head when performing the comparison check. This is only used for event types other than `pull_request` and `pull_request_target`.  | Any valid git ref(s) in your project                                                                         | none          |
+| `comment-summary-in-pr`                | Enable or disable reporting the review summary as a comment in the pull request. If enabled, you must give the workflow or job permission `pull-requests: write`.                 | `always`, `on-failure`, `never`                                                                              | `never`       |
+| `deny-packages`                        | Any number of packages to block in a PR.                                                                                                                                          | Package(s) in [purl](https://github.com/package-url/purl-spec) format                                        | empty         |
+| `deny-groups`                          | Any number of groups (namespaces) to block in a PR.                                                                                                                               | Namespace(s) in [purl](https://github.com/package-url/purl-spec) format (no package name, no version number) | empty         |
+| `retry-on-snapshot-warnings`\*         | Enable or disable retrying the action every 10 seconds while waiting for dependency submission actions to complete.                                                               | `true`, `false`                                                                                              | `false`       |
+| `retry-on-snapshot-warnings-timeout`\* | Maximum amount of time (in seconds) to retry the action while waiting for dependency submission actions to complete.                                                              | Any positive integer                                                                                         | 120           |

-*not supported for use with GitHub Enterprise Server
-
-†will be supported with GitHub Enterprise Server 3.8 
+\*not supported for use with GitHub Enterprise Server

+†will be supported with GitHub Enterprise Server 3.8

 ### Inline Configuration

-You can pass options to the Dependency Review GitHub Action using your workflow file. 
+You can pass options to the Dependency Review GitHub Action using your workflow file.

 #### Example

@@ -112,10 +117,10 @@ jobs:

 You can use an external configuration file to specify the settings for this action. It can be a local file or a file in an external repository. Refer to the following options for the specification.

-| Option                | Usage                                                                                                                                                                                    | Possible values                                                                                                                |
-|-----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------|
-| `config-file`         | A path to a file in the current repository or an external repository. Use this syntax for external files: `OWNER/REPOSITORY/FILENAME@BRANCH`                                             | **Local file**: `./.github/dependency-review-config.yml` <br> **External repo**: `github/octorepo/dependency-review-config.yml@main` |
-| `external-repo-token` | Specifies a token for fetching the configuration file. It is required if the file resides in a private external repository and for all GitHub Enterprise Server repositories. Create a token in [developer settings](https://github.com/settings/tokens). | Any token with `read` permissions to the repository hosting the config file.                                                   |
+| Option                | Usage                                                                                                                                                                                                                                                     | Possible values                                                                                                                      |
+| --------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
+| `config-file`         | A path to a file in the current repository or an external repository. Use this syntax for external files: `OWNER/REPOSITORY/FILENAME@BRANCH`                                                                                                              | **Local file**: `./.github/dependency-review-config.yml` <br> **External repo**: `github/octorepo/dependency-review-config.yml@main` |
+| `external-repo-token` | Specifies a token for fetching the configuration file. It is required if the file resides in a private external repository and for all GitHub Enterprise Server repositories. Create a token in [developer settings](https://github.com/settings/tokens). | Any token with `read` permissions to the repository hosting the config file.                                                         |

 #### Example

@@ -128,19 +133,22 @@ Start by specifying that you will be using an external configuration file:
    config-file: './.github/dependency-review-config.yml'
 ```

-And then create the file in the path you just specified: 
+And then create the file in the path you just specified. Please note
+that the **option names in external files use underscores instead of dashes**:

 ```yaml
-fail-on-severity: 'critical'
-allow-licenses:
+fail_on_severity: 'critical'
+allow_licenses:
  - 'GPL-3.0'
  - 'BSD-3-Clause'
  - 'MIT'
 ```

+For more examples of how to use this action and its configuration options, see the [examples](docs/examples.md) page.
+
 ### Considerations

- Checking for licenses is not supported on Enterprise Server.
+- Checking for licenses is not supported on Enterprise Server as the API does not return license information.
 - The action will only accept one of the two `license` parameters; an error will be raised if you provide both.
 - We don't have license information for all of your dependents. If we can't detect the license for a dependency **we will inform you, but the action won't fail**.

@@ -2,33 +2,7 @@ import {expect, test, beforeEach} from '@jest/globals'
 import {readConfig} from '../src/config'
 import {getRefs} from '../src/git-refs'
 import * as Utils from '../src/utils'
-
-// GitHub Action inputs come in the form of environment variables
-// with an INPUT prefix (e.g. INPUT_FAIL-ON-SEVERITY)
-function setInput(input: string, value: string) {
-  process.env[`INPUT_${input.toUpperCase()}`] = value
-}
-
-// We want a clean ENV before each test. We use `delete`
-// since we want `undefined` values and not empty strings.
-function clearInputs() {
-  const allowedOptions = [
-    'FAIL-ON-SEVERITY',
-    'FAIL-ON-SCOPES',
-    'ALLOW-LICENSES',
-    'DENY-LICENSES',
-    'ALLOW-GHSAS',
-    'LICENSE-CHECK',
-    'VULNERABILITY-CHECK',
-    'CONFIG-FILE',
-    'BASE-REF',
-    'HEAD-REF'
-  ]
-
-  allowedOptions.forEach(option => {
-    delete process.env[`INPUT_${option.toUpperCase()}`]
-  })
-}
+import {setInput, clearInputs} from './test-helpers'

 beforeAll(() => {
  jest.spyOn(Utils, 'isSPDXValid').mockReturnValue(true)
@@ -103,60 +77,6 @@ test('it raises an error when no refs are provided and the event is not a pull r
  ).toThrow()
 })

-test('it reads an external config file', async () => {
-  setInput('config-file', './__tests__/fixtures/config-allow-sample.yml')
-
-  const config = await readConfig()
-  expect(config.fail_on_severity).toEqual('critical')
-  expect(config.allow_licenses).toEqual(['BSD', 'GPL 2'])
-})
-
-test('raises an error when the config file was not found', async () => {
-  setInput('config-file', 'fixtures/i-dont-exist')
-  await expect(readConfig()).rejects.toThrow(/Unable to fetch/)
-})
-
-test('it parses options from both sources', async () => {
-  setInput('config-file', './__tests__/fixtures/config-allow-sample.yml')
-
-  let config = await readConfig()
-  expect(config.fail_on_severity).toEqual('critical')
-
-  setInput('base-ref', 'a-custom-base-ref')
-  config = await readConfig()
-  expect(config.base_ref).toEqual('a-custom-base-ref')
-})
-
-test('in case of conflicts, the inline config is the source of truth', async () => {
-  setInput('fail-on-severity', 'low')
-  setInput('config-file', './__tests__/fixtures/config-allow-sample.yml') // this will set fail-on-severity to 'critical'
-
-  const config = await readConfig()
-  expect(config.fail_on_severity).toEqual('low')
-})
-
-test('it uses the default values when loading external files', async () => {
-  setInput('config-file', './__tests__/fixtures/no-licenses-config.yml')
-  let config = await readConfig()
-  expect(config.allow_licenses).toEqual(undefined)
-  expect(config.deny_licenses).toEqual(undefined)
-
-  setInput('config-file', './__tests__/fixtures/license-config-sample.yml')
-  config = await readConfig()
-  expect(config.fail_on_severity).toEqual('low')
-})
-
-test('it accepts an external configuration filename', async () => {
-  setInput('config-file', './__tests__/fixtures/no-licenses-config.yml')
-  const config = await readConfig()
-  expect(config.fail_on_severity).toEqual('critical')
-})
-
-test('it raises an error when given an unknown severity in an external config file', async () => {
-  setInput('config-file', './__tests__/fixtures/invalid-severity-config.yml')
-  await expect(readConfig()).rejects.toThrow()
-})
-
 test('it defaults to runtime scope', async () => {
  const config = await readConfig()
  expect(config.fail_on_scopes).toEqual(['runtime'])
@@ -232,16 +152,6 @@ test('it is not possible to disable both checks', async () => {
  )
 })

-test('it supports comma-separated lists', async () => {
-  setInput(
-    'config-file',
-    './__tests__/fixtures/inline-license-config-sample.yml'
-  )
-  let config = await readConfig()
-
-  expect(config.allow_licenses).toEqual(['MIT', 'GPL-2.0-only'])
-})
-
 describe('licenses that are not valid SPDX licenses', () => {
  beforeAll(() => {
    jest.spyOn(Utils, 'isSPDXValid').mockReturnValue(false)
@@ -261,3 +171,29 @@ describe('licenses that are not valid SPDX licenses', () => {
    )
  })
 })
+
+test('it parses the comment-summary-in-pr input', async () => {
+  setInput('comment-summary-in-pr', 'true')
+  let config = await readConfig()
+  expect(config.comment_summary_in_pr).toBe('always')
+
+  clearInputs()
+  setInput('comment-summary-in-pr', 'false')
+  config = await readConfig()
+  expect(config.comment_summary_in_pr).toBe('never')
+
+  clearInputs()
+  setInput('comment-summary-in-pr', 'always')
+  config = await readConfig()
+  expect(config.comment_summary_in_pr).toBe('always')
+
+  clearInputs()
+  setInput('comment-summary-in-pr', 'never')
+  config = await readConfig()
+  expect(config.comment_summary_in_pr).toBe('never')
+
+  clearInputs()
+  setInput('comment-summary-in-pr', 'on-failure')
+  config = await readConfig()
+  expect(config.comment_summary_in_pr).toBe('on-failure')
+})
@@ -0,0 +1,166 @@
+import {expect, jest, test} from '@jest/globals'
+import {Change, Changes} from '../src/schemas'
+
+let getDeniedChanges: Function
+
+const npmChange: Change = {
+  manifest: 'package.json',
+  change_type: 'added',
+  ecosystem: 'npm',
+  name: 'Reeuhq',
+  version: '1.0.2',
+  package_url: 'pkg:npm/reeuhq@1.0.2',
+  license: 'MIT',
+  source_repository_url: 'github.com/some-repo',
+  scope: 'runtime',
+  vulnerabilities: [
+    {
+      severity: 'critical',
+      advisory_ghsa_id: 'first-random_string',
+      advisory_summary: 'very dangerous',
+      advisory_url: 'github.com/future-funk'
+    }
+  ]
+}
+
+const rubyChange: Change = {
+  change_type: 'added',
+  manifest: 'Gemfile.lock',
+  ecosystem: 'rubygems',
+  name: 'actionsomething',
+  version: '3.2.0',
+  package_url: 'pkg:gem/actionsomething@3.2.0',
+  license: 'BSD',
+  source_repository_url: 'github.com/some-repo',
+  scope: 'runtime',
+  vulnerabilities: [
+    {
+      severity: 'moderate',
+      advisory_ghsa_id: 'second-random_string',
+      advisory_summary: 'not so dangerous',
+      advisory_url: 'github.com/future-funk'
+    },
+    {
+      severity: 'low',
+      advisory_ghsa_id: 'third-random_string',
+      advisory_summary: 'dont page me',
+      advisory_url: 'github.com/future-funk'
+    }
+  ]
+}
+
+const pipChange: Change = {
+  change_type: 'added',
+  manifest: 'requirements.txt',
+  ecosystem: 'pip',
+  name: 'package-1',
+  version: '1.1.1',
+  package_url: 'pkg:pip/package-1@1.1.1',
+  license: 'MIT',
+  source_repository_url: 'github.com/some-repo',
+  scope: 'runtime',
+  vulnerabilities: [
+    {
+      severity: 'moderate',
+      advisory_ghsa_id: 'second-random_string',
+      advisory_summary: 'not so dangerous',
+      advisory_url: 'github.com/future-funk'
+    },
+    {
+      severity: 'low',
+      advisory_ghsa_id: 'third-random_string',
+      advisory_summary: 'dont page me',
+      advisory_url: 'github.com/future-funk'
+    }
+  ]
+}
+
+const mvnChange: Change = {
+  change_type: 'added',
+  manifest: 'pom.xml',
+  ecosystem: 'maven',
+  name: 'org.apache.logging.log4j:log4j-core',
+  version: '2.15.0',
+  package_url: 'pkg:maven/org.apache.logging.log4j/log4j-core@2.14.7',
+  license: 'Apache-2.0',
+  source_repository_url:
+    'https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core',
+  scope: 'unknown',
+  vulnerabilities: [
+    {
+      severity: 'critical',
+      advisory_ghsa_id: 'second-random_string',
+      advisory_summary: 'not so dangerous',
+      advisory_url: 'github.com/future-funk'
+    }
+  ]
+}
+
+jest.mock('@actions/core')
+
+const mockOctokit = {
+  rest: {
+    licenses: {
+      getForRepo: jest
+        .fn()
+        .mockReturnValue({data: {license: {spdx_id: 'AGPL'}}})
+    }
+  }
+}
+
+jest.mock('octokit', () => {
+  return {
+    // eslint-disable-next-line @typescript-eslint/no-extraneous-class
+    Octokit: class {
+      constructor() {
+        return mockOctokit
+      }
+    }
+  }
+})
+
+beforeEach(async () => {
+  jest.resetModules()
+  jest.doMock('spdx-satisfies', () => {
+    // mock spdx-satisfies return value
+    // true for BSD, false for all others
+    return jest.fn((license: string, _: string): boolean => license === 'BSD')
+  })
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  ;({getDeniedChanges} = require('../src/deny'))
+})
+
+test('it adds packages in the deny packages list', async () => {
+  const changes: Changes = [npmChange, rubyChange]
+  const deniedChanges = await getDeniedChanges(
+    changes,
+    ['pkg:gem/actionsomething'],
+    []
+  )
+
+  expect(deniedChanges[0]).toBe(rubyChange)
+  expect(deniedChanges.length).toEqual(1)
+})
+
+test('it adds packages in the deny group list', async () => {
+  const changes: Changes = [mvnChange, rubyChange]
+  const deniedChanges = await getDeniedChanges(
+    changes,
+    [],
+    ['pkg:maven/org.apache.logging.log4j']
+  )
+
+  expect(deniedChanges[0]).toBe(mvnChange)
+  expect(deniedChanges.length).toEqual(1)
+})
+
+test('it adds packages outside of the deny lists', async () => {
+  const changes: Changes = [npmChange, pipChange]
+  const deniedChanges = await getDeniedChanges(
+    changes,
+    ['pkg:gem/actionsomething'],
+    ['pkg:maven:org.apache.logging.log4j']
+  )
+
+  expect(deniedChanges.length).toEqual(0)
+})
@@ -0,0 +1,30 @@
+import {RequestError} from '@octokit/request-error'
+import * as dependencyGraph from '../src/dependency-graph'
+import * as core from '@actions/core'
+
+// mock call to core.getInput('repo-token'.. to avoid environment setup - Input required and not supplied: repo-token
+jest.mock('@actions/core', () => ({
+  getInput: (input: string) => {
+    if (input === 'repo-token') {
+      return 'gh_testtoken'
+    }
+  }
+}))
+
+test('it properly catches RequestError type', async () => {
+  const token = core.getInput('repo-token', {required: true})
+  expect(token).toBe('gh_testtoken')
+
+  //Integration test to make an API request using current dependencies and ensure response can parse into RequestError
+  try {
+    await dependencyGraph.compare({
+      owner: 'actions',
+      repo: 'dependency-review-action',
+      baseRef: 'refs/heads/master',
+      headRef: 'refs/heads/master'
+    })
+  } catch (error) {
+    const err = error as RequestError
+    expect(err.status).toBe(401)
+  }
+})
@@ -0,0 +1,111 @@
+import {expect, test, beforeEach} from '@jest/globals'
+import {readConfig} from '../src/config'
+import * as Utils from '../src/utils'
+import {setInput, clearInputs} from './test-helpers'
+
+const externalConfig = `fail_on_severity: 'high'
+allow_licenses: ['GPL-2.0-only']
+`
+const mockOctokit = {
+  rest: {
+    repos: {
+      getContent: jest.fn().mockReturnValue({data: externalConfig})
+    }
+  }
+}
+
+jest.mock('octokit', () => {
+  return {
+    // eslint-disable-next-line @typescript-eslint/no-extraneous-class
+    Octokit: class {
+      constructor() {
+        return mockOctokit
+      }
+    }
+  }
+})
+
+beforeAll(() => {
+  jest.spyOn(Utils, 'isSPDXValid').mockReturnValue(true)
+})
+
+beforeEach(() => {
+  clearInputs()
+})
+
+test('it reads an external config file', async () => {
+  setInput('config-file', './__tests__/fixtures/config-allow-sample.yml')
+
+  const config = await readConfig()
+  expect(config.fail_on_severity).toEqual('critical')
+  expect(config.allow_licenses).toEqual(['BSD', 'GPL 2'])
+})
+
+test('raises an error when the config file was not found', async () => {
+  setInput('config-file', 'fixtures/i-dont-exist')
+  await expect(readConfig()).rejects.toThrow(/Unable to fetch/)
+})
+
+test('it parses options from both sources', async () => {
+  setInput('config-file', './__tests__/fixtures/config-allow-sample.yml')
+
+  let config = await readConfig()
+  expect(config.fail_on_severity).toEqual('critical')
+
+  setInput('base-ref', 'a-custom-base-ref')
+  config = await readConfig()
+  expect(config.base_ref).toEqual('a-custom-base-ref')
+})
+
+test('in case of conflicts, the inline config is the source of truth', async () => {
+  setInput('fail-on-severity', 'low')
+  setInput('config-file', './__tests__/fixtures/config-allow-sample.yml') // this will set fail-on-severity to 'critical'
+
+  const config = await readConfig()
+  expect(config.fail_on_severity).toEqual('low')
+})
+
+test('it uses the default values when loading external files', async () => {
+  setInput('config-file', './__tests__/fixtures/no-licenses-config.yml')
+  let config = await readConfig()
+  expect(config.allow_licenses).toEqual(undefined)
+  expect(config.deny_licenses).toEqual(undefined)
+
+  setInput('config-file', './__tests__/fixtures/license-config-sample.yml')
+  config = await readConfig()
+  expect(config.fail_on_severity).toEqual('low')
+})
+
+test('it accepts an external configuration filename', async () => {
+  setInput('config-file', './__tests__/fixtures/no-licenses-config.yml')
+  const config = await readConfig()
+  expect(config.fail_on_severity).toEqual('critical')
+})
+
+test('it raises an error when given an unknown severity in an external config file', async () => {
+  setInput('config-file', './__tests__/fixtures/invalid-severity-config.yml')
+  await expect(readConfig()).rejects.toThrow()
+})
+
+test('it supports comma-separated lists', async () => {
+  setInput(
+    'config-file',
+    './__tests__/fixtures/inline-license-config-sample.yml'
+  )
+  const config = await readConfig()
+
+  expect(config.allow_licenses).toEqual(['MIT', 'GPL-2.0-only'])
+})
+
+test('it reads a config file hosted in another repo', async () => {
+  setInput(
+    'config-file',
+    'future-funk/anyone-cualkiera/external-config.yml@main'
+  )
+  setInput('external-repo-token', 'gh_viptoken')
+
+  const config = await readConfig()
+
+  expect(config.fail_on_severity).toEqual('high')
+  expect(config.allow_licenses).toEqual(['GPL-2.0-only'])
+})
@@ -1,12 +1,12 @@
 import {expect, test} from '@jest/globals'
-import {Change, Changes} from '../src/schemas'
+import {Change} from '../src/schemas'
 import {
  filterChangesBySeverity,
  filterChangesByScopes,
  filterAllowedAdvisories
 } from '../src/filter'

-let npmChange: Change = {
+const npmChange: Change = {
  manifest: 'package.json',
  change_type: 'added',
  ecosystem: 'npm',
@@ -26,7 +26,7 @@ let npmChange: Change = {
  ]
 }

-let rubyChange: Change = {
+const rubyChange: Change = {
  change_type: 'added',
  manifest: 'Gemfile.lock',
  ecosystem: 'rubygems',
@@ -52,7 +52,7 @@ let rubyChange: Change = {
  ]
 }

-let noVulnNpmChange: Change = {
+const noVulnNpmChange: Change = {
  manifest: 'package.json',
  change_type: 'added',
  ecosystem: 'npm',
@@ -92,7 +92,7 @@ test('it properly filters changes by scope', async () => {

 test('it properly handles undefined advisory IDs', async () => {
  const changes = [npmChange, rubyChange, noVulnNpmChange]
-  let result = filterAllowedAdvisories(undefined, changes)
+  const result = filterAllowedAdvisories(undefined, changes)
  expect(result).toEqual([npmChange, rubyChange, noVulnNpmChange])
 })

@@ -0,0 +1,36 @@
+import {Change} from '../../src/schemas'
+import {createTestVulnerability} from './create-test-vulnerability'
+
+const defaultChange: Change = {
+  change_type: 'added',
+  manifest: 'package.json',
+  ecosystem: 'npm',
+  name: 'lodash',
+  version: '4.17.20',
+  package_url: 'pkg:npm/lodash@4.17.20',
+  license: 'MIT',
+  source_repository_url: 'https://github.com/lodash/lodash',
+  scope: 'runtime',
+  vulnerabilities: [
+    createTestVulnerability({
+      severity: 'high',
+      advisory_ghsa_id: 'GHSA-35jh-r3h4-6jhm',
+      advisory_summary: 'Command Injection in lodash',
+      advisory_url: 'https://github.com/advisories/GHSA-35jh-r3h4-6jhm'
+    }),
+    createTestVulnerability({
+      severity: 'moderate',
+      advisory_ghsa_id: 'GHSA-29mw-wpgm-hmr9',
+      advisory_summary:
+        'Regular Expression Denial of Service (ReDoS) in lodash',
+      advisory_url: 'https://github.com/advisories/GHSA-29mw-wpgm-hmr9'
+    })
+  ]
+}
+
+const createTestChange = (overwrites: Partial<Change> = {}): Change => ({
+  ...defaultChange,
+  ...overwrites
+})
+
+export {createTestChange}
@@ -0,0 +1,19 @@
+import {Change} from '../../src/schemas'
+
+type Vulnerability = Change['vulnerabilities'][0]
+
+const defaultTestVulnerability: Vulnerability = {
+  severity: 'high',
+  advisory_ghsa_id: 'GHSA-35jh-r3h4-6jhm',
+  advisory_summary: 'Command Injection in lodash',
+  advisory_url: 'https://github.com/advisories/GHSA-35jh-r3h4-6jhm'
+}
+
+const createTestVulnerability = (
+  overwrites: Partial<Vulnerability> = {}
+): Vulnerability => ({
+  ...defaultTestVulnerability,
+  ...overwrites
+})
+
+export {createTestVulnerability}
@@ -1 +1 @@
-allow-licenses: MIT, GPL-2.0-only
+allow-licenses: "MIT, GPL-2.0-only"
@@ -1,3 +1,3 @@
-fail-on-severity: 'so many zombies'
-deny-licenses:
+fail_on_severity: 'so many zombies'
+deny_licenses:
  - MIT
@@ -3,7 +3,7 @@ import {Change, Changes} from '../src/schemas'

 let getInvalidLicenseChanges: Function

-let npmChange: Change = {
+const npmChange: Change = {
  manifest: 'package.json',
  change_type: 'added',
  ecosystem: 'npm',
@@ -23,7 +23,7 @@ let npmChange: Change = {
  ]
 }

-let rubyChange: Change = {
+const rubyChange: Change = {
  change_type: 'added',
  manifest: 'Gemfile.lock',
  ecosystem: 'rubygems',
@@ -49,6 +49,32 @@ let rubyChange: Change = {
  ]
 }

+const pipChange: Change = {
+  change_type: 'added',
+  manifest: 'requirements.txt',
+  ecosystem: 'pip',
+  name: 'package-1',
+  version: '1.1.1',
+  package_url: 'pkg:pip/package-1@1.1.1',
+  license: 'MIT',
+  source_repository_url: 'github.com/some-repo',
+  scope: 'runtime',
+  vulnerabilities: [
+    {
+      severity: 'moderate',
+      advisory_ghsa_id: 'second-random_string',
+      advisory_summary: 'not so dangerous',
+      advisory_url: 'github.com/future-funk'
+    },
+    {
+      severity: 'low',
+      advisory_ghsa_id: 'third-random_string',
+      advisory_summary: 'dont page me',
+      advisory_url: 'github.com/future-funk'
+    }
+  ]
+}
+
 jest.mock('@actions/core')

 const mockOctokit = {
@@ -63,6 +89,7 @@ const mockOctokit = {

 jest.mock('octokit', () => {
  return {
+    // eslint-disable-next-line @typescript-eslint/no-extraneous-class
    Octokit: class {
      constructor() {
        return mockOctokit
@@ -78,6 +105,7 @@ beforeEach(async () => {
    // true for BSD, false for all others
    return jest.fn((license: string, _: string): boolean => license === 'BSD')
  })
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
  ;({getInvalidLicenseChanges} = require('../src/licenses'))
 })

@@ -140,6 +168,7 @@ test('it adds all licenses to unresolved if it is unable to determine the validi
      throw new Error('Some Error')
    })
  })
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
  ;({getInvalidLicenseChanges} = require('../src/licenses'))
  const changes: Changes = [npmChange, rubyChange]
  const invalidLicenses = await getInvalidLicenseChanges(changes, {
@@ -150,6 +179,51 @@ test('it adds all licenses to unresolved if it is unable to determine the validi
  expect(invalidLicenses.unresolved.length).toEqual(2)
 })

+test('it does not filter out changes that are on the exclusions list', async () => {
+  const changes: Changes = [pipChange, npmChange, rubyChange]
+  const licensesConfig = {
+    allow: ['BSD'],
+    licenseExclusions: ['pkg:pip/package-1@1.1.1', 'pkg:npm/reeuhq@1.0.2']
+  }
+  const invalidLicenses = await getInvalidLicenseChanges(
+    changes,
+    licensesConfig
+  )
+  expect(invalidLicenses.forbidden.length).toEqual(0)
+})
+
+test('it does not fail when the packages dont have a valid PURL', async () => {
+  const emptyPurlChange = pipChange
+  emptyPurlChange.package_url = ''
+
+  const changes: Changes = [emptyPurlChange, npmChange, rubyChange]
+  const licensesConfig = {
+    allow: ['BSD'],
+    licenseExclusions: ['pkg:pip/package-1@1.1.1', 'pkg:npm/reeuhq@1.0.2']
+  }
+
+  const invalidLicenses = await getInvalidLicenseChanges(
+    changes,
+    licensesConfig
+  )
+  expect(invalidLicenses.forbidden.length).toEqual(1)
+})
+
+test('it does filters out changes if they are not on the exclusions list', async () => {
+  const changes: Changes = [pipChange, npmChange, rubyChange]
+  const licensesConfig = {
+    allow: ['BSD'],
+    licenseExclusions: ['pkg:pip/notmypackage-1@1.1.1', 'pkg:npm/alsonot@1.0.2']
+  }
+  const invalidLicenses = await getInvalidLicenseChanges(
+    changes,
+    licensesConfig
+  )
+  expect(invalidLicenses.forbidden.length).toEqual(2)
+  expect(invalidLicenses.forbidden[0]).toBe(pipChange)
+  expect(invalidLicenses.forbidden[1]).toBe(npmChange)
+})
+
 describe('GH License API fallback', () => {
  test('it calls licenses endpoint if atleast one of the changes has null license and valid source_repository_url', async () => {
    const nullLicenseChange = {
@@ -0,0 +1,389 @@
+import {expect, jest, test} from '@jest/globals'
+import {Changes, ConfigurationOptions} from '../src/schemas'
+import * as summary from '../src/summary'
+import * as core from '@actions/core'
+import {createTestChange} from './fixtures/create-test-change'
+import {createTestVulnerability} from './fixtures/create-test-vulnerability'
+
+afterEach(() => {
+  jest.clearAllMocks()
+  core.summary.emptyBuffer()
+})
+
+const emptyChanges: Changes = []
+const emptyInvalidLicenseChanges = {
+  forbidden: [],
+  unresolved: [],
+  unlicensed: []
+}
+const defaultConfig: ConfigurationOptions = {
+  vulnerability_check: true,
+  license_check: true,
+  fail_on_severity: 'high',
+  fail_on_scopes: ['runtime'],
+  allow_ghsas: [],
+  allow_licenses: [],
+  deny_licenses: [],
+  deny_packages: [],
+  deny_groups: [],
+  comment_summary_in_pr: true,
+  retry_on_snapshot_warnings: false,
+  retry_on_snapshot_warnings_timeout: 120
+}
+
+const changesWithEmptyManifests: Changes = [
+  {
+    change_type: 'added',
+    manifest: '',
+    ecosystem: 'unknown',
+    name: 'castore',
+    version: '0.1.17',
+    package_url: 'pkg:hex/castore@0.1.17',
+    license: null,
+    source_repository_url: null,
+    scope: 'runtime',
+    vulnerabilities: []
+  },
+  {
+    change_type: 'added',
+    manifest: '',
+    ecosystem: 'unknown',
+    name: 'connection',
+    version: '1.1.0',
+    package_url: 'pkg:hex/connection@1.1.0',
+    license: null,
+    source_repository_url: null,
+    scope: 'runtime',
+    vulnerabilities: []
+  },
+  {
+    change_type: 'added',
+    manifest: 'python/dist-info/METADATA',
+    ecosystem: 'pip',
+    name: 'pygments',
+    version: '2.6.1',
+    package_url: 'pkg:pypi/pygments@2.6.1',
+    license: 'BSD-2-Clause',
+    source_repository_url: 'https://github.com/pygments/pygments',
+    scope: 'runtime',
+    vulnerabilities: []
+  }
+]
+
+test('prints headline as h1', () => {
+  summary.addSummaryToSummary(
+    emptyChanges,
+    emptyInvalidLicenseChanges,
+    emptyChanges,
+    defaultConfig
+  )
+  const text = core.summary.stringify()
+
+  expect(text).toContain('<h1>Dependency Review</h1>')
+})
+
+test('only includes "No vulnerabilities or license issues found"-message if both are configured and nothing was found', () => {
+  summary.addSummaryToSummary(
+    emptyChanges,
+    emptyInvalidLicenseChanges,
+    emptyChanges,
+    defaultConfig
+  )
+  const text = core.summary.stringify()
+
+  expect(text).toContain('✅ No vulnerabilities or license issues found.')
+})
+
+test('only includes "No vulnerabilities found"-message if "license_check" is set to false and nothing was found', () => {
+  const config = {...defaultConfig, license_check: false}
+  summary.addSummaryToSummary(
+    emptyChanges,
+    emptyInvalidLicenseChanges,
+    emptyChanges,
+    config
+  )
+  const text = core.summary.stringify()
+
+  expect(text).toContain('✅ No vulnerabilities found.')
+})
+
+test('only includes "No license issues found"-message if "vulnerability_check" is set to false and nothing was found', () => {
+  const config = {...defaultConfig, vulnerability_check: false}
+  summary.addSummaryToSummary(
+    emptyChanges,
+    emptyInvalidLicenseChanges,
+    emptyChanges,
+    config
+  )
+  const text = core.summary.stringify()
+
+  expect(text).toContain('✅ No license issues found.')
+})
+
+test('groups dependencies with empty manifest paths together', () => {
+  summary.addSummaryToSummary(
+    changesWithEmptyManifests,
+    emptyInvalidLicenseChanges,
+    emptyChanges,
+    defaultConfig
+  )
+  summary.addScannedDependencies(changesWithEmptyManifests)
+  const text = core.summary.stringify()
+
+  expect(text).toContain('<summary>Unnamed Manifest</summary>')
+  expect(text).toContain('castore')
+  expect(text).toContain('connection')
+  expect(text).toContain('<summary>python/dist-info/METADATA</summary>')
+  expect(text).toContain('pygments')
+})
+
+test('does not include status section if nothing was found', () => {
+  summary.addSummaryToSummary(
+    emptyChanges,
+    emptyInvalidLicenseChanges,
+    emptyChanges,
+    defaultConfig
+  )
+  const text = core.summary.stringify()
+
+  expect(text).not.toContain('The following issues were found:')
+})
+
+test('includes count and status icons for all findings', () => {
+  const vulnerabilities = [
+    createTestChange({name: 'lodash'}),
+    createTestChange({name: 'underscore', package_url: 'test-url'})
+  ]
+  const licenseIssues = {
+    forbidden: [createTestChange()],
+    unresolved: [createTestChange(), createTestChange()],
+    unlicensed: [createTestChange(), createTestChange(), createTestChange()]
+  }
+
+  summary.addSummaryToSummary(
+    vulnerabilities,
+    licenseIssues,
+    emptyChanges,
+    defaultConfig
+  )
+
+  const text = core.summary.stringify()
+  expect(text).toContain('❌ 2 vulnerable package(s)')
+  expect(text).toContain(
+    '❌ 2 package(s) with invalid SPDX license definitions'
+  )
+  expect(text).toContain('❌ 1 package(s) with incompatible licenses')
+  expect(text).toContain('⚠️ 3 package(s) with unknown licenses')
+})
+
+test('uses checkmarks for license issues if only vulnerabilities were found', () => {
+  const vulnerabilities = [createTestChange()]
+
+  summary.addSummaryToSummary(
+    vulnerabilities,
+    emptyInvalidLicenseChanges,
+    emptyChanges,
+    defaultConfig
+  )
+
+  const text = core.summary.stringify()
+  expect(text).toContain('❌ 1 vulnerable package(s)')
+  expect(text).toContain(
+    '✅ 0 package(s) with invalid SPDX license definitions'
+  )
+  expect(text).toContain('✅ 0 package(s) with incompatible licenses')
+  expect(text).toContain('✅ 0 package(s) with unknown licenses')
+})
+
+test('uses checkmarks for vulnerabilities if only license issues were found', () => {
+  const licenseIssues = {
+    forbidden: [createTestChange()],
+    unresolved: [],
+    unlicensed: []
+  }
+
+  summary.addSummaryToSummary(
+    emptyChanges,
+    licenseIssues,
+    emptyChanges,
+    defaultConfig
+  )
+
+  const text = core.summary.stringify()
+  expect(text).toContain('✅ 0 vulnerable package(s)')
+  expect(text).toContain(
+    '✅ 0 package(s) with invalid SPDX license definitions'
+  )
+  expect(text).toContain('❌ 1 package(s) with incompatible licenses')
+  expect(text).toContain('✅ 0 package(s) with unknown licenses')
+})
+
+test('addChangeVulnerabilitiesToSummary() - only includes section if any vulnerabilites found', () => {
+  summary.addChangeVulnerabilitiesToSummary(emptyChanges, 'low')
+  const text = core.summary.stringify()
+  expect(text).toEqual('')
+})
+
+test('addChangeVulnerabilitiesToSummary() - includes all vulnerabilities', () => {
+  const changes = [
+    createTestChange({name: 'lodash'}),
+    createTestChange({name: 'underscore', package_url: 'test-url'})
+  ]
+
+  summary.addChangeVulnerabilitiesToSummary(changes, 'low')
+
+  const text = core.summary.stringify()
+  expect(text).toContain('<h2>Vulnerabilities</h2>')
+  expect(text).toContain('lodash')
+  expect(text).toContain('underscore')
+})
+
+test('addChangeVulnerabilitiesToSummary() - includes advisory url if available', () => {
+  const changes = [
+    createTestChange({
+      name: 'underscore',
+      vulnerabilities: [
+        createTestVulnerability({
+          advisory_summary: 'test-summary',
+          advisory_url: 'test-url'
+        })
+      ]
+    })
+  ]
+
+  summary.addChangeVulnerabilitiesToSummary(changes, 'low')
+
+  const text = core.summary.stringify()
+  expect(text).toContain('lodash')
+  expect(text).toContain('<a href="test-url">test-summary</a>')
+})
+
+test('addChangeVulnerabilitiesToSummary() - groups vulnerabilities of a single package', () => {
+  const changes = [
+    createTestChange({
+      name: 'package-with-multiple-vulnerabilities',
+      vulnerabilities: [
+        createTestVulnerability({advisory_summary: 'test-summary-1'}),
+        createTestVulnerability({advisory_summary: 'test-summary-2'})
+      ]
+    })
+  ]
+
+  summary.addChangeVulnerabilitiesToSummary(changes, 'low')
+
+  const text = core.summary.stringify()
+  expect(text.match('package-with-multiple-vulnerabilities')).toHaveLength(1)
+  expect(text).toContain('test-summary-1')
+  expect(text).toContain('test-summary-2')
+})
+
+test('addChangeVulnerabilitiesToSummary() - prints severity statement if above low', () => {
+  const changes = [createTestChange()]
+
+  summary.addChangeVulnerabilitiesToSummary(changes, 'medium')
+
+  const text = core.summary.stringify()
+  expect(text).toContain(
+    'Only included vulnerabilities with severity <strong>medium</strong> or higher.'
+  )
+})
+
+test('addChangeVulnerabilitiesToSummary() - does not print severity statment if it is set to "low"', () => {
+  const changes = [createTestChange()]
+
+  summary.addChangeVulnerabilitiesToSummary(changes, 'low')
+
+  const text = core.summary.stringify()
+  expect(text).not.toContain('Only included vulnerabilities')
+})
+
+test('addLicensesToSummary() - does not include entire section if no license issues found', () => {
+  summary.addLicensesToSummary(emptyInvalidLicenseChanges, defaultConfig)
+  const text = core.summary.stringify()
+  expect(text).toEqual('')
+})
+
+test('addLicensesToSummary() - includes all license issues in table', () => {
+  const licenseIssues = {
+    forbidden: [createTestChange()],
+    unresolved: [createTestChange(), createTestChange()],
+    unlicensed: [createTestChange(), createTestChange(), createTestChange()]
+  }
+
+  summary.addLicensesToSummary(licenseIssues, defaultConfig)
+
+  const text = core.summary.stringify()
+  expect(text).toContain('<h2>License Issues</h2>')
+  expect(text).toContain('<td>Incompatible License</td>')
+  expect(text).toContain('<td>Invalid SPDX License</td>')
+  expect(text).toContain('<td>Unknown License</td>')
+})
+
+test('addLicenseToSummary() - adds one table per manifest', () => {
+  const licenseIssues = {
+    forbidden: [
+      createTestChange({manifest: 'package.json'}),
+      createTestChange({manifest: '.github/workflows/test.yml'})
+    ],
+    unresolved: [],
+    unlicensed: []
+  }
+
+  summary.addLicensesToSummary(licenseIssues, defaultConfig)
+
+  const text = core.summary.stringify()
+
+  expect(text).toContain('<h4><em>package.json</em></h4>')
+  expect(text).toContain('<h4><em>.github/workflows/test.yml</em></h4>')
+})
+
+test('addLicensesToSummary() - does not include specific license type sub-section if nothing is found', () => {
+  const licenseIssues = {
+    forbidden: [],
+    unlicensed: [],
+    unresolved: [createTestChange()]
+  }
+
+  summary.addLicensesToSummary(licenseIssues, defaultConfig)
+
+  const text = core.summary.stringify()
+  expect(text).not.toContain('<td>Incompatible License</td>')
+  expect(text).not.toContain('<td>Unknown License</td>')
+  expect(text).toContain('<td>Invalid SPDX License</td>')
+})
+
+test('addLicensesToSummary() - includes list of configured allowed licenses', () => {
+  const licenseIssues = {
+    forbidden: [createTestChange()],
+    unresolved: [],
+    unlicensed: []
+  }
+
+  const config: ConfigurationOptions = {
+    ...defaultConfig,
+    allow_licenses: ['MIT', 'Apache-2.0']
+  }
+
+  summary.addLicensesToSummary(licenseIssues, config)
+
+  const text = core.summary.stringify()
+  expect(text).toContain('<strong>Allowed Licenses</strong>: MIT, Apache-2.0')
+})
+
+test('addLicensesToSummary() - includes configured denied license', () => {
+  const licenseIssues = {
+    forbidden: [createTestChange()],
+    unresolved: [],
+    unlicensed: []
+  }
+
+  const config: ConfigurationOptions = {
+    ...defaultConfig,
+    deny_licenses: ['MIT']
+  }
+
+  summary.addLicensesToSummary(licenseIssues, config)
+
+  const text = core.summary.stringify()
+  expect(text).toContain('<strong>Denied Licenses</strong>: MIT')
+})
@@ -0,0 +1,28 @@
+// GitHub Action inputs come in the form of environment variables
+// with an INPUT prefix (e.g. INPUT_FAIL-ON-SEVERITY)
+export function setInput(input: string, value: string): void {
+  process.env[`INPUT_${input.toUpperCase()}`] = value
+}
+
+// We want a clean ENV before each test. We use `delete`
+// since we want `undefined` values and not empty strings.
+export function clearInputs(): void {
+  const allowedOptions = [
+    'FAIL-ON-SEVERITY',
+    'FAIL-ON-SCOPES',
+    'ALLOW-LICENSES',
+    'DENY-LICENSES',
+    'ALLOW-GHSAS',
+    'LICENSE-CHECK',
+    'VULNERABILITY-CHECK',
+    'CONFIG-FILE',
+    'BASE-REF',
+    'HEAD-REF',
+    'COMMENT-SUMMARY-IN-PR'
+  ]
+
+  // eslint-disable-next-line github/array-foreach
+  allowedOptions.forEach(option => {
+    delete process.env[`INPUT_${option.toUpperCase()}`]
+  })
+}
@@ -1,3 +1,5 @@
+# Avoid using default values for options here since they will
+# end up overriding external configurations.
 name: 'Dependency Review'
 description: 'Prevent the introduction of dependencies with known vulnerabilities'
 author: 'GitHub'
@@ -9,11 +11,9 @@ inputs:
  fail-on-severity:
    description: Don't block PRs below this severity. Possible values are `low`, `moderate`, `high`, `critical`.
    required: false
-    default: 'low'
  fail-on-scopes:
    description: Dependency scopes to block PRs on. Comma-separated list. Possible values are 'unknown', 'runtime', and 'development' (e.g. "runtime, development")
    required: false
-    default: 'runtime'
  base-ref:
    description: The base git ref to be used for this check. Has a default value when the workflow event is `pull_request` or `pull_request_target`. Must be provided otherwise.
    required: false
@@ -29,6 +29,9 @@ inputs:
  deny-licenses:
    description: Comma-separated list of forbidden licenses (e.g. "MIT, GPL 3.0, BSD 2 Clause")
    required: false
+  allow-dependencies-licenses:
+    description: Comma-separated list of dependencies in purl format (e.g. "pkg:npm/express, pkg:pip/pycrypto"). These dependencies will be permitted to use any license, no matter what license policy is enforced otherwise.
+    required: false
  allow-ghsas:
    description: Comma-separated list of allowed GitHub Advisory IDs (e.g. "GHSA-abcd-1234-5679, GHSA-efgh-1234-5679")
    required: false
@@ -41,6 +44,23 @@ inputs:
  vulnerability-check:
    description: A boolean to determine if vulnerability checks should be performed
    required: false
+  comment-summary-in-pr:
+    description: Determines if the summary is posted as a comment in the PR itself. Setting this to `always` or `on-failure` requires you to give the workflow the write permissions for pull-requests
+    required: false
+  deny-packages:
+    description: A comma-separated list of package URLs to deny (e.g. "pkg:npm/express, pkg:pip/pycrypto")
+    required: false
+  deny-groups:
+    description: A comma-separated list of package URLs for group(s)/namespace(s) to deny (e.g. "pkg:npm/express, pkg:pip/pycrypto")
+    required: false
+  retry-on-snapshot-warnings:
+    description: Whether to retry on snapshot warnings
+    required: false
+    default: false
+  retry-on-snapshot-warnings-timeout:
+    description: Number of seconds to wait before stopping snapshot retries.
+    required: false
+    default: 120
 runs:
  using: 'node16'
  main: 'dist/index.js'
@@ -1340,6 +1340,28 @@ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
 IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.


+packageurl-js
+MIT
+Copyright (c) the purl authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
 safe-buffer
 MIT
 The MIT License (MIT)
@@ -0,0 +1,296 @@
+# Examples on how to use the Dependancy Review Action
+
+## Basic Usage
+
+A very basic example of how to use the action. This will run the action with the default configuration.
+
+The full list of configuration options can be found [here](../README.md#configuration-options).
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+```
+
+## Using an inline configuration
+
+The following example will fail the action if any vulnerabilities are found with a severity of medium or higher; and if any packages are found with an incompatible license - in this case, the LGPL-2.0 and BSD-2-Clause licenses.
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          fail-on-severity: critical
+          deny-licenses: LGPL-2.0, BSD-2-Clause
+```
+
+## Using a configuration file
+
+The following example will use a configuration file to configure the action. This is useful if you want to keep your configuration in a single place and makes it easier to manage as the configuration grows.
+
+The configuration file can be located in the same repository or in a separate repository. Having it in a separate repository might be useful if you plan to use the same configuration across multiple repositories and control it centrally.
+
+In this example, the configuration file is located in the same repository under `.github/dependency-review-config.yml`. The following configuration will fail the action if any vulnerabilities are found with a severity of critical; and if any packages are found with an incompatible license - in this case, the LGPL-2.0 and BSD-2-Clause licenses.
+
+```yaml
+fail_on_severity: 'critical'
+allow_licenses:
+  - 'LGPL-2.0'
+  - 'BSD-2-Clause'
+```
+
+The Dependancy Review Action workflow file will then look like this:
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          config-file: './.github/dependency-review-config.yml'
+```
+
+## Using a configuration file from an external repository
+
+The following example will use a configuration file from an external public GitHub repository to configure the action.
+
+Let's say that the configuration file is located in `github/octorepo/dependency-review-config.yml@main`
+
+The Dependancy Review Action workflow file will then look like this:
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          config-file: 'github/octorepo/dependency-review-config.yml@main'
+```
+
+## Using a configuration file from an external repository with a personal access token
+
+The following example will use a configuration file from an external private GtiHub repository to configure the action.
+
+Let's say that the configuration file is located in `github/octorepo-private/dependency-review-config.yml@main`
+
+The Dependancy Review Action workflow file will then look like this:
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          config-file: 'github/octorepo-private/dependency-review-config.yml@main'
+          external-repo-token: ${{ secrets.GITHUB_TOKEN }} # or a personal access token
+```
+
+## Getting the results of the action in the PR as a comment
+
+Using the `comment-summary-in-pr` you can get the results of the action in the PR as a comment. In order for this to work, the action needs to be able to create a comment in the PR. This requires additional `pull-requests: write` permission.
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          fail-on-severity: critical
+          deny-licenses: LGPL-2.0, BSD-2-Clause
+          comment-summary-in-pr: always
+```
+
+## Exclude dependencies from the license check
+
+Using the `allow-dependencies-licenses` you can exclude dependencies from the license check. The values should be provided in [purl](https://github.com/package-url/purl-spec) format.
+
+In this example, we are excluding `lodash` from `npm` and `requests` from `pip` dependencies from the license check
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          fail-on-severity: critical
+          deny-licenses: LGPL-2.0, BSD-2-Clause
+          comment-summary-in-pr: always
+          allow-dependencies-licenses: 'pkg:npm/loadash, pkg:pip/requests'
+```
+
+If we were to use configuration file, the configuration would look like this:
+
+```yaml
+fail-on-severity: 'critical'
+allow-licenses:
+  - 'LGPL-2.0'
+  - 'BSD-2-Clause'
+allow-dependencies-licenses:
+  - 'pkg:npm/loadash'
+  - 'pkg:pip/requests'
+```
+
+## Only check for vulnerabilities
+
+To only do the vulnerability check you can use the `license-check` to disable the license compatibility check (which is done by default).
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          fail-on-severity: critical
+          comment-summary-in-pr: always
+          license-check: false
+```
+
+## Exclude dependencies from their name or groups
+
+Using the `deny-packages` option you can exclude dependencies by their PURL. You can add multiple values separated by a commas.
+Using the `deny-groups` option you can exclude dependencies by their group name/namespace. You can add multiple values separated by a comma.
+
+In this example, we are excluding `pkg:maven/org.apache.logging.log4j:log4j-api` and `pkg:maven/org.apache.logging.log4j/log4j-core` from `maven` and all packages in the group `pkg:maven/com.bazaarvoice.maven`
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          deny-packages: 'pkg:maven/org.apache.logging.log4j/log4j-api,pkg:maven/org.apache.logging.log4j/log4j-core'
+          deny-groups: 'pkg:maven/com.bazaarvoice.jolt'
+```
+
+## Waiting for dependency submission jobs to complete
+
+When possible, this action will [include dependencies submitted through the dependency submission API][DSAPI]. In this case,
+it's important for the action not to complete until all of the relevant dependencies have been submitted for both the base
+and head commits.
+
+When this action runs before one or more of the dependency submission actions, there will be an unequal number of dependency
+snapshots between the base and head commits. For example, there may be one snapshot available for the tip of `main` and none
+for the PR branch. In that case, the API response will contain a "snapshot warning" explaining the discrepancy.
+
+In this example, when the action encounters one of these warnings it will retry every 10 seconds after that for 60 seconds
+or until there is no warning in the response.
+
+```yaml
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v3
+        with:
+          retry-on-snapshot-warnings: true
+          retry-on-snapshot-warnings-timeout: 60
+```
+
+[DSAPI]: https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/about-dependency-review#best-practices-for-using-the-dependency-review-api-and-the-dependency-submission-api-together
@@ -1,11 +1,11 @@
 {
  "name": "dependency-review-action",
-  "version": "3.0.2",
+  "version": "3.1.0",
  "private": true,
  "description": "A GitHub Action for Dependency Review",
  "main": "lib/main.js",
  "scripts": {
-    "build": "tsc",
+    "build": "tsc -p tsconfig.build.json",
    "format": "prettier --write '**/*.ts'",
    "format-check": "prettier --check '**/*.ts'",
    "lint": "eslint src/**/*.ts",
@@ -27,34 +27,35 @@
  "dependencies": {
    "@actions/core": "^1.10.0",
    "@actions/github": "^5.1.1",
-    "@octokit/plugin-retry": "^4.0.3",
-    "@octokit/request-error": "^3.0.2",
+    "@octokit/plugin-retry": "^5.0.4",
+    "@octokit/request-error": "^5.0.1",
    "ansi-styles": "^6.2.1",
-    "got": "^12.5.3",
-    "nodemon": "^2.0.20",
-    "octokit": "^2.0.11",
+    "got": "^13.0.0",
+    "octokit": "^2.1.0",
+    "packageurl-js": "^1.0.2",
    "spdx-expression-parse": "^3.0.1",
    "spdx-satisfies": "^5.0.1",
-    "yaml": "^2.2.1",
-    "zod": "^3.20.2"
+    "yaml": "^2.3.2",
+    "zod": "^3.22.2"
  },
  "devDependencies": {
    "@types/jest": "^27.5.2",
-    "@types/node": "^16.18.11",
-    "@typescript-eslint/eslint-plugin": "^5.45.0",
-    "@typescript-eslint/parser": "^5.48.0",
+    "@types/node": "^16.18.48",
    "@types/spdx-expression-parse": "^3.0.2",
    "@types/spdx-satisfies": "^0.1.0",
-    "@vercel/ncc": "^0.36.0",
-    "esbuild-register": "^3.4.2",
-    "eslint": "^8.31.0",
-    "eslint-plugin-github": "^4.6.0",
-    "eslint-plugin-jest": "^27.2.1",
+    "@typescript-eslint/eslint-plugin": "^6.7.2",
+    "@typescript-eslint/parser": "^6.6.0",
+    "@vercel/ncc": "^0.36.1",
+    "esbuild-register": "^3.5.0",
+    "eslint": "^8.48.0",
+    "eslint-plugin-github": "^4.8.0",
+    "eslint-plugin-jest": "^27.2.2",
+    "eslint-plugin-prettier": "^5.0.0",
    "jest": "^27.5.1",
    "js-yaml": "^4.1.0",
-    "nodemon": "^2.0.20",
-    "prettier": "2.8.2",
+    "nodemon": "^3.0.1",
+    "prettier": "3.0.2",
    "ts-jest": "^27.1.4",
-    "typescript": "^4.9.4"
+    "typescript": "^4.9.5"
  }
 }
@@ -0,0 +1,126 @@
+/**
+ * This scripts creates example markdown files for the summary in the ./tmp folder.
+ * You can use it to preview changes to the summary.
+ *
+ * You can execute it like this:
+ * npx ts-node scripts/create_summary.ts
+ */
+
+import {Change, Changes, ConfigurationOptions} from '../src/schemas'
+import {createTestChange} from '../__tests__/fixtures/create-test-change'
+import {InvalidLicenseChanges} from '../src/licenses'
+import * as fs from 'fs'
+import * as core from '@actions/core'
+import * as summary from '../src/summary'
+import * as path from 'path'
+
+const defaultConfig: ConfigurationOptions = {
+  vulnerability_check: true,
+  license_check: true,
+  fail_on_severity: 'high',
+  fail_on_scopes: ['runtime'],
+  allow_ghsas: [],
+  allow_licenses: ['MIT'],
+  deny_licenses: [],
+  deny_packages: [],
+  deny_groups: [],
+  allow_dependencies_licenses: [
+    'pkg:npm/express@4.17.1',
+    'pkg:pip/requests',
+    'pkg:pip/certifi',
+    'pkg:pip/pycrypto@2.6.1'
+  ],
+  comment_summary_in_pr: true,
+  retry_on_snapshot_warnings: false,
+  retry_on_snapshot_warnings_timeout: 120
+}
+
+const tmpDir = path.resolve(__dirname, '../tmp')
+
+const createExampleSummaries = async (): Promise<void> => {
+  await fs.promises.mkdir(tmpDir, {recursive: true})
+
+  await createNonIssueSummary()
+  await createFullSummary()
+}
+
+const createNonIssueSummary = async (): Promise<void> => {
+  await createSummary(
+    [],
+    {forbidden: [], unresolved: [], unlicensed: []},
+    [],
+    defaultConfig,
+    'non-issue-summary.md'
+  )
+}
+
+const createFullSummary = async (): Promise<void> => {
+  const changes = [createTestChange()]
+  const licenses: InvalidLicenseChanges = {
+    forbidden: [
+      createTestChange({
+        name: 'underscore',
+        version: '1.12.0',
+        license: 'Apache 2.0'
+      })
+    ],
+    unresolved: [
+      createTestChange({
+        name: 'octoinvader',
+        license: 'Non SPDX License'
+      }),
+      createTestChange({
+        name: 'owner/action-1',
+        license: 'XYZ-License',
+        version: 'v1.2.2',
+        manifest: '.github/workflows/action.yml'
+      })
+    ],
+    unlicensed: [
+      createTestChange({
+        name: 'my-other-dependency',
+        license: null
+      }),
+      createTestChange({
+        name: 'owner/action-2',
+        version: 'main',
+        license: null,
+        manifest: '.github/workflows/action.yml'
+      })
+    ]
+  }
+
+  await createSummary(changes, licenses, [], defaultConfig, 'full-summary.md')
+}
+
+async function createSummary(
+  vulnerabilities: Changes,
+  licenseIssues: InvalidLicenseChanges,
+  denied: Change[],
+  config: ConfigurationOptions,
+  fileName: string
+): Promise<void> {
+  summary.addSummaryToSummary(vulnerabilities, licenseIssues, denied, config)
+  summary.addChangeVulnerabilitiesToSummary(
+    vulnerabilities,
+    config.fail_on_severity
+  )
+  summary.addLicensesToSummary(licenseIssues, defaultConfig)
+
+  const allChanges = [
+    ...vulnerabilities,
+    ...licenseIssues.forbidden,
+    ...licenseIssues.unresolved,
+    ...licenseIssues.unlicensed
+  ]
+
+  summary.addScannedDependencies(allChanges)
+
+  const text = core.summary.stringify()
+  await fs.promises.writeFile(path.resolve(tmpDir, fileName), text, {
+    flag: 'w'
+  })
+  core.summary.emptyBuffer()
+}
+
+createExampleSummaries()
@@ -0,0 +1,84 @@
+import * as github from '@actions/github'
+import * as core from '@actions/core'
+import * as githubUtils from '@actions/github/lib/utils'
+import * as retry from '@octokit/plugin-retry'
+import {RequestError} from '@octokit/request-error'
+
+const retryingOctokit = githubUtils.GitHub.plugin(retry.retry)
+const octo = new retryingOctokit(
+  githubUtils.getOctokitOptions(core.getInput('repo-token', {required: true}))
+)
+
+// Comment Marker to identify an existing comment to update, so we don't spam the PR with comments
+const COMMENT_MARKER = '<!-- dependency-review-pr-comment-marker -->'
+
+export async function commentPr(summary: typeof core.summary): Promise<void> {
+  if (!github.context.payload.pull_request) {
+    core.warning(
+      'Not in the context of a pull request. Skipping comment creation.'
+    )
+    return
+  }
+
+  const commentBody = `${summary.stringify()}\n\n${COMMENT_MARKER}`
+
+  try {
+    const existingCommentId = await findCommentByMarker(COMMENT_MARKER)
+
+    if (existingCommentId) {
+      await octo.rest.issues.updateComment({
+        owner: github.context.repo.owner,
+        repo: github.context.repo.repo,
+        comment_id: existingCommentId,
+        body: commentBody
+      })
+    } else {
+      await octo.rest.issues.createComment({
+        owner: github.context.repo.owner,
+        repo: github.context.repo.repo,
+        issue_number: github.context.payload.pull_request.number,
+        body: commentBody
+      })
+    }
+  } catch (error) {
+    if (error instanceof RequestError && error.status === 403) {
+      core.warning(
+        `Unable to write summary to pull-request. Make sure you are giving this workflow the permission 'pull-requests: write'.`
+      )
+    } else {
+      if (error instanceof Error) {
+        core.warning(
+          `Unable to comment summary to pull-request, received error: ${error.message}`
+        )
+      } else {
+        core.warning(
+          'Unable to comment summary to pull-request: Unexpected fatal error'
+        )
+      }
+    }
+  }
+}
+
+async function findCommentByMarker(
+  commentBodyIncludes: string
+): Promise<number | undefined> {
+  const commentsIterator = octo.paginate.iterator(
+    octo.rest.issues.listComments,
+    {
+      owner: github.context.repo.owner,
+      repo: github.context.repo.repo,
+      // We are already checking if we are in the context of a pull request in the caller
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      issue_number: github.context.payload.pull_request!.number
+    }
+  )
+
+  for await (const {data: comments} of commentsIterator) {
+    const existingComment = comments.find(
+      comment => comment.body?.includes(commentBodyIncludes)
+    )
+    if (existingComment) return existingComment.id
+  }
+
+  return undefined
+}
@@ -5,6 +5,7 @@ import * as core from '@actions/core'
 import * as z from 'zod'
 import {ConfigurationOptions, ConfigurationOptionsSchema} from './schemas'
 import {isSPDXValid, octokitClient} from './utils'
+import {PackageURL} from 'packageurl-js'

 type ConfigurationOptionsPartial = Partial<ConfigurationOptions>

@@ -29,12 +30,25 @@ function readInlineConfig(): ConfigurationOptionsPartial {
  const fail_on_scopes = parseList(getOptionalInput('fail-on-scopes'))
  const allow_licenses = parseList(getOptionalInput('allow-licenses'))
  const deny_licenses = parseList(getOptionalInput('deny-licenses'))
+  const allow_dependencies_licenses = parseList(
+    getOptionalInput('allow-dependencies-licenses')
+  )
+  const deny_packages = parseList(getOptionalInput('deny-packages'))
+  const deny_groups = parseList(getOptionalInput('deny-groups'))
  const allow_ghsas = parseList(getOptionalInput('allow-ghsas'))
  const license_check = getOptionalBoolean('license-check')
  const vulnerability_check = getOptionalBoolean('vulnerability-check')
  const base_ref = getOptionalInput('base-ref')
  const head_ref = getOptionalInput('head-ref')
+  const comment_summary_in_pr = getOptionalInput('comment-summary-in-pr')
+  const retry_on_snapshot_warnings = getOptionalBoolean(
+    'retry-on-snapshot-warnings'
+  )
+  const retry_on_snapshot_warnings_timeout = getOptionalNumber(
+    'retry-on-snapshot-warnings-timeout'
+  )

+  validatePURL(allow_dependencies_licenses)
  validateLicenses('allow-licenses', allow_licenses)
  validateLicenses('deny-licenses', deny_licenses)

@@ -43,11 +57,17 @@ function readInlineConfig(): ConfigurationOptionsPartial {
    fail_on_scopes,
    allow_licenses,
    deny_licenses,
+    deny_packages,
+    deny_groups,
+    allow_dependencies_licenses,
    allow_ghsas,
    license_check,
    vulnerability_check,
    base_ref,
-    head_ref
+    head_ref,
+    comment_summary_in_pr,
+    retry_on_snapshot_warnings,
+    retry_on_snapshot_warnings_timeout
  }

  return Object.fromEntries(
@@ -55,6 +75,12 @@ function readInlineConfig(): ConfigurationOptionsPartial {
  )
 }

+function getOptionalNumber(name: string): number | undefined {
+  const value = core.getInput(name)
+  const parsed = z.string().regex(/^\d+$/).transform(Number).safeParse(value)
+  return parsed.success ? parsed.data : undefined
+}
+
 function getOptionalBoolean(name: string): boolean | undefined {
  const value = core.getInput(name)
  return value.length > 0 ? core.getBooleanInput(name) : undefined
@@ -128,7 +154,10 @@ function parseConfigFile(configData: string): ConfigurationOptionsPartial {
      'allow-licenses',
      'deny-licenses',
      'fail-on-scopes',
-      'allow-ghsas'
+      'allow-ghsas',
+      'allow-dependencies-licenses',
+      'deny-packages',
+      'deny-groups'
    ]

    for (const key of Object.keys(data)) {
@@ -147,6 +176,11 @@ function parseConfigFile(configData: string): ConfigurationOptionsPartial {
        validateLicenses(key, data[key])
      }

+      // validate purls from the allow-dependencies-licenses
+      if (key === 'allow-dependencies-licenses') {
+        validatePURL(data[key])
+      }
+
      // get rid of the ugly dashes from the actions conventions
      if (key.includes('-')) {
        data[key.replace(/-/g, '_')] = data[key]
@@ -185,3 +219,19 @@ async function getRemoteConfig(configOpts: {
    throw new Error('Error fetching remote config file')
  }
 }
+function validatePURL(allow_dependencies_licenses: string[] | undefined): void {
+  //validate that the provided elements of the string are in valid purl format
+  if (allow_dependencies_licenses === undefined) {
+    return
+  }
+  const invalid_purls = allow_dependencies_licenses.filter(
+    purl => !PackageURL.fromString(purl)
+  )
+
+  if (invalid_purls.length > 0) {
+    throw new Error(
+      `Invalid purl(s) in allow-dependencies-licenses: ${invalid_purls}`
+    )
+  }
+  return
+}
@@ -0,0 +1,42 @@
+import {Change} from './schemas'
+import * as core from '@actions/core'
+
+export async function getDeniedChanges(
+  changes: Change[],
+  deniedPackages: string[],
+  deniedGroups: string[]
+): Promise<Change[]> {
+  const changesDenied: Change[] = []
+
+  let failed = false
+  for (const change of changes) {
+    change.name = change.name.toLowerCase()
+    const packageUrl = change.package_url.toLowerCase().split('@')[0]
+
+    if (deniedPackages) {
+      for (const denied of deniedPackages) {
+        if (packageUrl === denied.split('@')[0].toLowerCase()) {
+          changesDenied.push(change)
+          failed = true
+        }
+      }
+    }
+
+    if (deniedGroups) {
+      for (const denied of deniedGroups) {
+        if (packageUrl.startsWith(denied.toLowerCase())) {
+          changesDenied.push(change)
+          failed = true
+        }
+      }
+    }
+  }
+
+  if (failed) {
+    core.setFailed('Dependency review detected denied packages.')
+  } else {
+    core.info('Dependency review did not detect any denied packages')
+  }
+
+  return changesDenied
+}
@@ -1,9 +1,14 @@
 import * as core from '@actions/core'
 import * as githubUtils from '@actions/github/lib/utils'
 import * as retry from '@octokit/plugin-retry'
-import {Changes, ChangesSchema} from './schemas'
+import {
+  ChangesSchema,
+  ComparisonResponse,
+  ComparisonResponseSchema
+} from './schemas'

 const retryingOctokit = githubUtils.GitHub.plugin(retry.retry)
+const SnapshotWarningsHeader = 'x-github-dependency-graph-snapshot-warnings'
 const octo = new retryingOctokit(
  githubUtils.getOctokitOptions(core.getInput('repo-token', {required: true}))
 )
@@ -18,14 +23,31 @@ export async function compare({
  repo: string
  baseRef: string
  headRef: string
-}): Promise<Changes> {
+}): Promise<ComparisonResponse> {
+  let snapshot_warnings = ''
  const changes = await octo.paginate(
-    'GET /repos/{owner}/{repo}/dependency-graph/compare/{basehead}',
    {
+      method: 'GET',
+      url: '/repos/{owner}/{repo}/dependency-graph/compare/{basehead}',
      owner,
      repo,
      basehead: `${baseRef}...${headRef}`
+    },
+    response => {
+      if (
+        response.headers[SnapshotWarningsHeader] &&
+        typeof response.headers[SnapshotWarningsHeader] === 'string'
+      ) {
+        snapshot_warnings = Buffer.from(
+          response.headers[SnapshotWarningsHeader],
+          'base64'
+        ).toString('utf-8')
+      }
+      return ChangesSchema.parse(response.data)
    }
  )
-  return ChangesSchema.parse(changes)
+  return ComparisonResponseSchema.parse({
+    changes,
+    snapshot_warnings
+  })
 }
@@ -1,32 +1,72 @@
 import spdxSatisfies from 'spdx-satisfies'
 import {Change, Changes} from './schemas'
 import {isSPDXValid, octokitClient} from './utils'
+import {PackageURL} from 'packageurl-js'

 /**
 * Loops through a list of changes, filtering and returning the
 * ones that don't conform to the licenses allow/deny lists.
+ * It will also filter out the changes which are defined in the licenseExclusions list.
 *
 * Keep in mind that we don't let users specify both an allow and a deny
 * list in their config files, so this code works under the assumption that
 * one of the two list parameters will be empty. If both lists are provided,
 * we will ignore the deny list.
 * @param {Change[]} changes The list of changes to filter.
- * @param { { allow?: string[], deny?: string[]}} licenses An object with `allow`/`deny` keys, each containing a list of licenses.
+ * @param { { allow?: string[], deny?: string[], licenseExclusions?: string[]}} licenses An object with `allow`/`deny`/`licenseExclusions` keys, each containing a list of licenses.
 * @returns {Promise<{Object.<string, Array.<Change>>}} A promise to a Record Object. The keys are strings, unlicensed, unresolved and forbidden. The values are a list of changes
 */
+export type InvalidLicenseChangeTypes =
+  | 'unlicensed'
+  | 'unresolved'
+  | 'forbidden'
+export type InvalidLicenseChanges = Record<InvalidLicenseChangeTypes, Changes>
 export async function getInvalidLicenseChanges(
  changes: Change[],
  licenses: {
    allow?: string[]
    deny?: string[]
+    licenseExclusions?: string[]
  }
-): Promise<Record<string, Changes>> {
+): Promise<InvalidLicenseChanges> {
  const {allow, deny} = licenses
+  const licenseExclusions = licenses.licenseExclusions?.map(
+    (pkgUrl: string) => {
+      return PackageURL.fromString(pkgUrl)
+    }
+  )

  const groupedChanges = await groupChanges(changes)
+
+  // Takes the changes from the groupedChanges object and filters out the ones that are part of the exclusions list
+  // It does by creating a new PackageURL object from the change and comparing it to the exclusions list
+  groupedChanges.licensed = groupedChanges.licensed.filter(change => {
+    if (change.package_url.length === 0) {
+      return true
+    }
+
+    const changeAsPackageURL = PackageURL.fromString(change.package_url)
+
+    // We want to find if the licenseExclussion list contains the PackageURL of the Change
+    // If it does, we want to filter it out and therefore return false
+    // If it doesn't, we want to keep it and therefore return true
+    if (
+      licenseExclusions !== null &&
+      licenseExclusions !== undefined &&
+      licenseExclusions.findIndex(
+        exclusion =>
+          exclusion.type === changeAsPackageURL.type &&
+          exclusion.name === changeAsPackageURL.name
+      ) !== -1
+    ) {
+      return false
+    } else {
+      return true
+    }
+  })
  const licensedChanges: Changes = groupedChanges.licensed

-  const invalidLicenseChanges: Record<string, Changes> = {
+  const invalidLicenseChanges: InvalidLicenseChanges = {
    unlicensed: groupedChanges.unlicensed,
    unresolved: [],
    forbidden: []
@@ -3,7 +3,7 @@ import * as dependencyGraph from './dependency-graph'
 import * as github from '@actions/github'
 import styles from 'ansi-styles'
 import {RequestError} from '@octokit/request-error'
-import {Change, Severity, Changes} from './schemas'
+import {Change, Severity, Changes, ConfigurationOptions} from './schemas'
 import {readConfig} from '../src/config'
 import {
  filterChangesBySeverity,
@@ -15,18 +15,70 @@ import * as summary from './summary'
 import {getRefs} from './git-refs'

 import {groupDependenciesByManifest} from './utils'
+import {commentPr} from './comment-pr'
+import {getDeniedChanges} from './deny'
+
+async function delay(ms: number): Promise<void> {
+  return new Promise(resolve => setTimeout(resolve, ms))
+}
+
+async function getComparison(
+  baseRef: string,
+  headRef: string,
+  retryOpts?: {
+    retryUntil: number
+    retryDelay: number
+  }
+): ReturnType<typeof dependencyGraph.compare> {
+  const comparison = await dependencyGraph.compare({
+    owner: github.context.repo.owner,
+    repo: github.context.repo.repo,
+    baseRef,
+    headRef
+  })
+
+  if (comparison.snapshot_warnings.trim() !== '') {
+    core.info(comparison.snapshot_warnings)
+    if (retryOpts !== undefined) {
+      if (retryOpts.retryUntil < Date.now()) {
+        core.info(`Retry timeout exceeded. Proceeding...`)
+        return comparison
+      } else {
+        core.info(`Retrying in ${retryOpts.retryDelay} seconds...`)
+        await delay(retryOpts.retryDelay * 1000)
+        return getComparison(baseRef, headRef, retryOpts)
+      }
+    }
+  }
+
+  return comparison
+}

 async function run(): Promise<void> {
  try {
    const config = await readConfig()
+
    const refs = getRefs(config, github.context)

-    const changes = await dependencyGraph.compare({
-      owner: github.context.repo.owner,
-      repo: github.context.repo.repo,
-      baseRef: refs.base,
-      headRef: refs.head
-    })
+    const comparison = await getComparison(
+      refs.base,
+      refs.head,
+      config.retry_on_snapshot_warnings
+        ? {
+            retryUntil:
+              Date.now() + config.retry_on_snapshot_warnings_timeout * 1000,
+            retryDelay: 10
+          }
+        : undefined
+    )
+
+    const changes = comparison.changes
+    const snapshot_warnings = comparison.snapshot_warnings
+
+    if (!changes) {
+      core.info('No Dependency Changes found. Skipping Dependency Review.')
+      return
+    }

    const minSeverity = config.fail_on_severity
    const scopedChanges = filterChangesByScopes(config.fail_on_scopes, changes)
@@ -35,7 +87,7 @@ async function run(): Promise<void> {
      scopedChanges
    )

-    const addedChanges = filterChangesBySeverity(
+    const vulnerableChanges = filterChangesBySeverity(
      minSeverity,
      filteredChanges
    ).filter(
@@ -49,26 +101,53 @@ async function run(): Promise<void> {
      filteredChanges,
      {
        allow: config.allow_licenses,
-        deny: config.deny_licenses
+        deny: config.deny_licenses,
+        licenseExclusions: config.allow_dependencies_licenses
      }
    )

-    summary.addSummaryToSummary(
-      config.vulnerability_check ? addedChanges : null,
-      config.license_check ? invalidLicenseChanges : null
+    core.debug(`Filtered Changes: ${JSON.stringify(filteredChanges)}`)
+    core.debug(`Config Deny Packages: ${JSON.stringify(config)}`)
+
+    const deniedChanges = await getDeniedChanges(
+      filteredChanges,
+      config.deny_packages,
+      config.deny_groups
    )

+    summary.addSummaryToSummary(
+      vulnerableChanges,
+      invalidLicenseChanges,
+      deniedChanges,
+      config
+    )
+
+    if (snapshot_warnings) {
+      summary.addSnapshotWarnings(config, snapshot_warnings)
+    }
+
    if (config.vulnerability_check) {
-      summary.addChangeVulnerabilitiesToSummary(addedChanges, minSeverity)
-      printVulnerabilitiesBlock(addedChanges, minSeverity)
+      summary.addChangeVulnerabilitiesToSummary(vulnerableChanges, minSeverity)
+      printVulnerabilitiesBlock(vulnerableChanges, minSeverity)
    }
    if (config.license_check) {
      summary.addLicensesToSummary(invalidLicenseChanges, config)
      printLicensesBlock(invalidLicenseChanges)
    }
+    if (config.deny_packages || config.deny_groups) {
+      summary.addDeniedToSummary(deniedChanges)
+      printDeniedDependencies(deniedChanges, config)
+    }

    summary.addScannedDependencies(changes)
    printScannedDependencies(changes)
+    if (
+      config.comment_summary_in_pr === 'always' ||
+      (config.comment_summary_in_pr === 'on-failure' &&
+        process.exitCode === core.ExitCode.Failure)
+    ) {
+      await commentPr(core.summary)
+    }
  } catch (error) {
    if (error instanceof RequestError && error.status === 404) {
      core.setFailed(
@@ -76,7 +155,7 @@ async function run(): Promise<void> {
      )
    } else if (error instanceof RequestError && error.status === 403) {
      core.setFailed(
-        `Dependency review is not supported on this repository. Please ensure that Dependency graph is enabled, see https://github.com/${github.context.repo.owner}/${github.context.repo.repo}/settings/security_analysis`
+        `Dependency review is not supported on this repository. Please ensure that Dependency graph is enabled along with GitHub Advanced Security on private repositories, see https://github.com/${github.context.repo.owner}/${github.context.repo.repo}/settings/security_analysis`
      )
    } else {
      if (error instanceof Error) {
@@ -221,4 +300,20 @@ function printScannedDependencies(changes: Changes): void {
  })
 }

+function printDeniedDependencies(
+  changes: Change[],
+  config: ConfigurationOptions
+): void {
+  core.group('Denied', async () => {
+    for (const denied of config.deny_packages) {
+      core.info(`Config: ${denied}`)
+    }
+
+    for (const change of changes) {
+      core.info(`Change: ${change.name}@${change.version} is denied`)
+      core.info(`Change: ${change.package_url} is denied`)
+    }
+  })
+}
+
 run()
@@ -40,12 +40,34 @@ export const ConfigurationOptionsSchema = z
    fail_on_scopes: z.array(z.enum(SCOPES)).default(['runtime']),
    allow_licenses: z.array(z.string()).optional(),
    deny_licenses: z.array(z.string()).optional(),
+    allow_dependencies_licenses: z.array(z.string()).optional(),
    allow_ghsas: z.array(z.string()).default([]),
+    deny_packages: z.array(z.string()).default([]),
+    deny_groups: z.array(z.string()).default([]),
    license_check: z.boolean().default(true),
    vulnerability_check: z.boolean().default(true),
    config_file: z.string().optional(),
    base_ref: z.string().optional(),
-    head_ref: z.string().optional()
+    head_ref: z.string().optional(),
+    retry_on_snapshot_warnings: z.boolean().default(false),
+    retry_on_snapshot_warnings_timeout: z.number().default(120),
+    comment_summary_in_pr: z
+      .union([
+        z.preprocess(
+          val => (val === 'true' ? true : val === 'false' ? false : val),
+          z.boolean()
+        ),
+        z.enum(['always', 'never', 'on-failure'])
+      ])
+      .default('never')
+  })
+  .transform(config => {
+    if (config.comment_summary_in_pr === true) {
+      config.comment_summary_in_pr = 'always'
+    } else if (config.comment_summary_in_pr === false) {
+      config.comment_summary_in_pr = 'never'
+    }
+    return config
  })
  .superRefine((config, context) => {
    if (config.allow_licenses && config.deny_licenses) {
@@ -72,9 +94,14 @@ export const ConfigurationOptionsSchema = z
  })

 export const ChangesSchema = z.array(ChangeSchema)
+export const ComparisonResponseSchema = z.object({
+  changes: z.array(ChangeSchema),
+  snapshot_warnings: z.string()
+})

 export type Change = z.infer<typeof ChangeSchema>
 export type Changes = z.infer<typeof ChangesSchema>
+export type ComparisonResponse = z.infer<typeof ComparisonResponseSchema>
 export type ConfigurationOptions = z.infer<typeof ConfigurationOptionsSchema>
 export type Severity = z.infer<typeof SeveritySchema>
 export type Scope = (typeof SCOPES)[number]
@@ -1,50 +1,91 @@
 import * as core from '@actions/core'
-import {ConfigurationOptions, Changes} from './schemas'
+import {ConfigurationOptions, Changes, Change} from './schemas'
 import {SummaryTableRow} from '@actions/core/lib/summary'
+import {InvalidLicenseChanges, InvalidLicenseChangeTypes} from './licenses'
 import {groupDependenciesByManifest, getManifestsSet, renderUrl} from './utils'

-export function addSummaryToSummary(
-  addedPackages: Changes | null,
-  invalidLicenseChanges: Record<string, Changes> | null
-): void {
-  core.summary
-    .addHeading('Dependency Review')
-    .addRaw('We found:')
-    .addList([
-      ...(addedPackages
-        ? [`${addedPackages.length} vulnerable package(s)`]
-        : []),
-      ...(invalidLicenseChanges
-        ? [
-            `${invalidLicenseChanges.unresolved.length} package(s) with invalid SPDX license definitions`,
-            `${invalidLicenseChanges.forbidden.length} package(s) with incompatible licenses`,
-            `${invalidLicenseChanges.unlicensed.length} package(s) with unknown licenses.`
-          ]
-        : [])
-    ])
+const icons = {
+  check: '✅',
+  cross: '❌',
+  warning: '⚠️'
 }

-export function addChangeVulnerabilitiesToSummary(
-  addedPackages: Changes,
-  severity: string
+export function addSummaryToSummary(
+  vulnerableChanges: Changes,
+  invalidLicenseChanges: InvalidLicenseChanges,
+  deniedChanges: Changes,
+  config: ConfigurationOptions
 ): void {
-  const rows: SummaryTableRow[] = []
+  core.summary.addHeading('Dependency Review', 1)

-  const manifests = getManifestsSet(addedPackages)
+  if (
+    vulnerableChanges.length === 0 &&
+    countLicenseIssues(invalidLicenseChanges) === 0 &&
+    deniedChanges.length === 0
+  ) {
+    if (!config.license_check) {
+      core.summary.addRaw(`${icons.check} No vulnerabilities found.`)
+    } else if (!config.vulnerability_check) {
+      core.summary.addRaw(`${icons.check} No license issues found.`)
+    } else {
+      core.summary.addRaw(
+        `${icons.check} No vulnerabilities or license issues found.`
+      )
+    }

-  core.summary
-    .addHeading('Vulnerabilities')
-    .addQuote(
-      `Vulnerabilities were filtered by minimum severity <strong>${severity}</strong>.`
-    )
-
-  if (addedPackages.length === 0) {
-    core.summary.addQuote('No vulnerabilities found in added packages.')
    return
  }

+  core.summary
+    .addRaw('The following issues were found:')
+    .addList([
+      ...(config.vulnerability_check
+        ? [
+            `${checkOrFailIcon(vulnerableChanges.length)} ${
+              vulnerableChanges.length
+            } vulnerable package(s)`
+          ]
+        : []),
+      ...(config.license_check
+        ? [
+            `${checkOrFailIcon(invalidLicenseChanges.forbidden.length)} ${
+              invalidLicenseChanges.forbidden.length
+            } package(s) with incompatible licenses`,
+            `${checkOrFailIcon(invalidLicenseChanges.unresolved.length)} ${
+              invalidLicenseChanges.unresolved.length
+            } package(s) with invalid SPDX license definitions`,
+            `${checkOrWarnIcon(invalidLicenseChanges.unlicensed.length)} ${
+              invalidLicenseChanges.unlicensed.length
+            } package(s) with unknown licenses.`
+          ]
+        : []),
+      ...(deniedChanges.length > 0
+        ? [
+            `${checkOrWarnIcon(deniedChanges.length)} ${
+              deniedChanges.length
+            } package(s) denied.`
+          ]
+        : [])
+    ])
+    .addRaw('See the Details below.')
+}
+
+export function addChangeVulnerabilitiesToSummary(
+  vulnerableChanges: Changes,
+  severity: string
+): void {
+  if (vulnerableChanges.length === 0) {
+    return
+  }
+
+  const rows: SummaryTableRow[] = []
+
+  const manifests = getManifestsSet(vulnerableChanges)
+
+  core.summary.addHeading('Vulnerabilities', 2)
+
  for (const manifest of manifests) {
-    for (const change of addedPackages.filter(
+    for (const change of vulnerableChanges.filter(
      pkg => pkg.manifest === manifest
    )) {
      let previous_package = ''
@@ -72,7 +113,7 @@ export function addChangeVulnerabilitiesToSummary(
        previous_version = change.version
      }
    }
-    core.summary.addHeading(`<em>${manifest}</em>`, 3).addTable([
+    core.summary.addHeading(`<em>${manifest}</em>`, 4).addTable([
      [
        {data: 'Name', header: true},
        {data: 'Version', header: true},
@@ -82,13 +123,24 @@ export function addChangeVulnerabilitiesToSummary(
      ...rows
    ])
  }
+
+  if (severity !== 'low') {
+    core.summary.addQuote(
+      `Only included vulnerabilities with severity <strong>${severity}</strong> or higher.`
+    )
+  }
 }

 export function addLicensesToSummary(
-  invalidLicenseChanges: Record<string, Changes>,
+  invalidLicenseChanges: InvalidLicenseChanges,
  config: ConfigurationOptions
 ): void {
-  core.summary.addHeading('Licenses')
+  if (countLicenseIssues(invalidLicenseChanges) === 0) {
+    return
+  }
+
+  core.summary.addHeading('License Issues', 2)
+  printLicenseViolations(invalidLicenseChanges)

  if (config.allow_licenses && config.allow_licenses.length > 0) {
    core.summary.addQuote(
@@ -100,10 +152,12 @@ export function addLicensesToSummary(
      `<strong>Denied Licenses</strong>: ${config.deny_licenses.join(', ')}`
    )
  }
-
-  if (Object.values(invalidLicenseChanges).every(item => item.length === 0)) {
-    core.summary.addQuote('No license violations detected.')
-    return
+  if (config.allow_dependencies_licenses) {
+    core.summary.addQuote(
+      `<strong>Excluded from license check</strong>: ${config.allow_dependencies_licenses.join(
+        ', '
+      )}`
+    )
  }

  core.debug(
@@ -113,39 +167,43 @@ export function addLicensesToSummary(
  core.debug(
    `${invalidLicenseChanges.unresolved.length} licenses could not be validated`
  )
-
-  printLicenseViolation(
-    'Incompatible Licenses',
-    invalidLicenseChanges.forbidden
-  )
-  printLicenseViolation('Unknown Licenses', invalidLicenseChanges.unlicensed)
-  printLicenseViolation(
-    'Invalid SPDX License Definitions',
-    invalidLicenseChanges.unresolved
-  )
 }
-function printLicenseViolation(heading: string, changes: Changes): void {
-  core.summary.addHeading(heading, 5).addSeparator()

-  if (changes.length > 0) {
-    const rows: SummaryTableRow[] = []
-    const manifests = getManifestsSet(changes)
+const licenseIssueTypes: InvalidLicenseChangeTypes[] = [
+  'forbidden',
+  'unresolved',
+  'unlicensed'
+]

-    for (const manifest of manifests) {
-      core.summary.addHeading(`<em>${manifest}</em>`, 4)
+const issueTypeNames: Record<InvalidLicenseChangeTypes, string> = {
+  forbidden: 'Incompatible License',
+  unresolved: 'Invalid SPDX License',
+  unlicensed: 'Unknown License'
+}

-      for (const change of changes.filter(pkg => pkg.manifest === manifest)) {
-        rows.push([
-          renderUrl(change.source_repository_url, change.name),
-          change.version,
-          formatLicense(change.license)
-        ])
+function printLicenseViolations(changes: InvalidLicenseChanges): void {
+  const rowsGroupedByManifest: Record<string, SummaryTableRow[]> = {}
+
+  for (const issueType of licenseIssueTypes) {
+    for (const change of changes[issueType]) {
+      if (!rowsGroupedByManifest[change.manifest]) {
+        rowsGroupedByManifest[change.manifest] = []
      }
-
-      core.summary.addTable([['Package', 'Version', 'License'], ...rows])
+      rowsGroupedByManifest[change.manifest].push([
+        renderUrl(change.source_repository_url, change.name),
+        change.version,
+        formatLicense(change.license),
+        issueTypeNames[issueType]
+      ])
    }
-  } else {
-    core.summary.addQuote(`No ${heading.toLowerCase()} detected.`)
+  }
+
+  for (const [manifest, rows] of Object.entries(rowsGroupedByManifest)) {
+    core.summary.addHeading(`<em>${manifest}</em>`, 4)
+    core.summary.addTable([
+      ['Package', 'Version', 'License', 'Issue Type'],
+      ...rows
+    ])
  }
 }

@@ -160,9 +218,7 @@ export function addScannedDependencies(changes: Changes): void {
  const dependencies = groupDependenciesByManifest(changes)
  const manifests = dependencies.keys()

-  const summary = core.summary
-    .addHeading('Scanned Dependencies')
-    .addHeading(`We scanned ${dependencies.size} manifest files:`, 5)
+  const summary = core.summary.addHeading('Scanned Manifest Files', 2)

  for (const manifest of manifests) {
    const deps = dependencies.get(manifest)
@@ -174,3 +230,69 @@ export function addScannedDependencies(changes: Changes): void {
    }
  }
 }
+
+function snapshotWarningRecommendation(
+  config: ConfigurationOptions,
+  warnings: string
+): string {
+  const no_pr_snaps = warnings.includes(
+    'No snapshots were found for the head SHA'
+  )
+  const retries_disabled = !config.retry_on_snapshot_warnings
+  if (no_pr_snaps && retries_disabled) {
+    return 'Ensure that dependencies are being submitted on PR branches and consider enabling <em>retry-on-snapshot-warnings</em>.'
+  } else if (no_pr_snaps) {
+    return 'Ensure that dependencies are being submitted on PR branches. Re-running this action after a short time may resolve the issue.'
+  } else if (retries_disabled) {
+    return 'Consider enabling <em>retry-on-snapshot-warnings</em>.'
+  }
+  return 'Re-running this action after a short time may resolve the issue.'
+}
+
+export function addSnapshotWarnings(
+  config: ConfigurationOptions,
+  warnings: string
+): void {
+  core.summary.addHeading('Snapshot Warnings', 2)
+  core.summary.addQuote(`${icons.warning}: ${warnings}`)
+  const recommendation = snapshotWarningRecommendation(config, warnings)
+  const docsLink =
+    'See <a href="https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/about-dependency-review#best-practices-for-using-the-dependency-review-api-and-the-dependency-submission-api-together">the documentation</a> for more information and troubleshooting advice.'
+  core.summary.addRaw(`${recommendation} ${docsLink}`)
+}
+
+function countLicenseIssues(
+  invalidLicenseChanges: InvalidLicenseChanges
+): number {
+  return Object.values(invalidLicenseChanges).reduce(
+    (acc, val) => acc + val.length,
+    0
+  )
+}
+
+export function addDeniedToSummary(deniedChanges: Change[]): void {
+  if (deniedChanges.length === 0) {
+    return
+  }
+
+  core.summary.addHeading('Denied dependencies', 2)
+  for (const change of deniedChanges) {
+    core.summary.addHeading(`<em>Denied dependencies</em>`, 4)
+    core.summary.addTable([
+      ['Package', 'Version', 'License'],
+      [
+        renderUrl(change.source_repository_url, change.name),
+        change.version,
+        change.license || ''
+      ]
+    ])
+  }
+}
+
+function checkOrFailIcon(count: number): string {
+  return count === 0 ? icons.check : icons.cross
+}
+
+function checkOrWarnIcon(count: number): string {
+  return count === 0 ? icons.check : icons.warning
+}
@@ -8,7 +8,9 @@ export function groupDependenciesByManifest(
 ): Map<string, Changes> {
  const dependencies: Map<string, Changes> = new Map()
  for (const change of changes) {
-    const manifestName = change.manifest
+    // If the manifest is null or empty, give it a name now to avoid
+    // breaking the HTML rendering later
+    const manifestName = change.manifest || 'Unnamed Manifest'

    if (dependencies.get(manifestName) === undefined) {
      dependencies.set(manifestName, [])
@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["src"],
+  "compilerOptions": {
+    "outDir": "./lib" /* Redirect output structure to the directory. */,
+    "rootDir": "./src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+  }
+}
@@ -3,10 +3,9 @@
    "target": "es6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
    "outDir": "./lib" /* Redirect output structure to the directory. */,
-    "rootDir": "./src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
    "strict": true /* Enable all strict type-checking options. */,
    "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
  },
-  "exclude": ["node_modules", "**/*.test.ts"]
+  "exclude": ["node_modules"]
 }