Merge pull request #494 from actions/fix-purl-bug

Empty PURLs should not block the action from running

README.md

@@ -66,19 +66,20 @@ 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          |
-| `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`.                 | `true`, `false`                                                              | `false`       |
+| 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`.                 | `true`, `false`                                                              | `false`       |
 
-*not supported for use with GitHub Enterprise Server
+\*not supported for use with GitHub Enterprise Server
 
 †will be supported with GitHub Enterprise Server 3.8
 
@@ -139,6 +140,8 @@ allow_licenses:
   - '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.

__tests__/licenses.test.ts

@@ -49,6 +49,32 @@ const 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 = {
@@ -153,6 +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 = {

__tests__/summary.test.ts

@@ -27,6 +27,45 @@ const defaultConfig: ConfigurationOptions = {
   comment_summary_in_pr: true
 }
 
+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,
@@ -65,6 +104,22 @@ test('only includes "No license issues found"-message if "vulnerability_check" i
   expect(text).toContain('✅ No license issues found.')
 })
 
+test('groups dependencies with empty manifest paths together', () => {
+  summary.addSummaryToSummary(
+    changesWithEmptyManifests,
+    emptyInvalidLicenseChanges,
+    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,

action.yml

@@ -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

dist/licenses.txt

@@ -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)

docs/examples.md

@@ -0,0 +1,232 @@
+# 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 a 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 a 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'
+          config-file-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: true
+```
+
+## 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: true
+          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: true
+          license-check: false
+```

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dependency-review-action",
-  "version": "3.0.4",
+  "version": "3.0.6",
   "private": true,
   "description": "A GitHub Action for Dependency Review",
   "main": "lib/main.js",
@@ -32,30 +32,31 @@
     "ansi-styles": "^6.2.1",
     "got": "^12.6.0",
     "nodemon": "^2.0.22",
-    "octokit": "^2.0.14",
+    "octokit": "^2.0.16",
+    "packageurl-js": "^1.0.2",
     "spdx-expression-parse": "^3.0.1",
     "spdx-satisfies": "^5.0.1",
-    "yaml": "^2.2.1",
+    "yaml": "^2.3.1",
     "zod": "^3.21.4"
   },
   "devDependencies": {
     "@types/jest": "^27.5.2",
-    "@types/node": "^16.18.23",
+    "@types/node": "^16.18.34",
     "@typescript-eslint/eslint-plugin": "^5.48.1",
     "@typescript-eslint/parser": "^5.48.0",
     "@types/spdx-expression-parse": "^3.0.2",
     "@types/spdx-satisfies": "^0.1.0",
-    "@typescript-eslint/eslint-plugin": "^5.57.0",
-    "@typescript-eslint/parser": "^5.57.0",
+    "@typescript-eslint/eslint-plugin": "^5.59.8",
+    "@typescript-eslint/parser": "^5.59.8",
     "@vercel/ncc": "^0.36.1",
     "esbuild-register": "^3.4.2",
-    "eslint": "^8.37.0",
+    "eslint": "^8.41.0",
     "eslint-plugin-github": "^4.7.0",
     "eslint-plugin-jest": "^27.2.1",
     "jest": "^27.5.1",
     "js-yaml": "^4.1.0",
     "nodemon": "^2.0.22",
-    "prettier": "2.8.7",
+    "prettier": "2.8.8",
     "ts-jest": "^27.1.4",
     "typescript": "^4.9.5"
   }

scripts/create_summary.ts

@@ -22,6 +22,12 @@ const defaultConfig: ConfigurationOptions = {
   allow_ghsas: [],
   allow_licenses: ['MIT'],
   deny_licenses: [],
+  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
 }
 

src/config.ts

@@ -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>
 
@@ -29,6 +30,9 @@ 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 allow_ghsas = parseList(getOptionalInput('allow-ghsas'))
   const license_check = getOptionalBoolean('license-check')
   const vulnerability_check = getOptionalBoolean('vulnerability-check')
@@ -36,6 +40,7 @@ function readInlineConfig(): ConfigurationOptionsPartial {
   const head_ref = getOptionalInput('head-ref')
   const comment_summary_in_pr = getOptionalBoolean('comment-summary-in-pr')
 
+  validatePURL(allow_dependencies_licenses)
   validateLicenses('allow-licenses', allow_licenses)
   validateLicenses('deny-licenses', deny_licenses)
 
@@ -44,6 +49,7 @@ function readInlineConfig(): ConfigurationOptionsPartial {
     fail_on_scopes,
     allow_licenses,
     deny_licenses,
+    allow_dependencies_licenses,
     allow_ghsas,
     license_check,
     vulnerability_check,
@@ -130,7 +136,8 @@ function parseConfigFile(configData: string): ConfigurationOptionsPartial {
       'allow-licenses',
       'deny-licenses',
       'fail-on-scopes',
-      'allow-ghsas'
+      'allow-ghsas',
+      'allow-dependencies-licenses'
     ]
 
     for (const key of Object.keys(data)) {
@@ -149,6 +156,11 @@ 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]
@@ -187,3 +199,19 @@ 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
+}

src/dependency-graph.ts

@@ -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
+  })
 }

src/licenses.ts

@@ -1,17 +1,19 @@
 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 =
@@ -24,11 +26,44 @@ export async function getInvalidLicenseChanges(
   licenses: {
     allow?: string[]
     deny?: string[]
+    licenseExclusions?: string[]
   }
 ): 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: InvalidLicenseChanges = {

src/main.ts

@@ -20,14 +20,17 @@ import {commentPr} from './comment-pr'
 async function run(): Promise<void> {
   try {
     const config = await readConfig()
+
     const refs = getRefs(config, github.context)
 
-    const changes = await dependencyGraph.compare({
+    const comparison = await dependencyGraph.compare({
       owner: github.context.repo.owner,
       repo: github.context.repo.repo,
       baseRef: refs.base,
       headRef: refs.head
     })
+    const changes = comparison.changes
+    const snapshot_warnings = comparison.snapshot_warnings
 
     if (!changes) {
       core.info('No Dependency Changes found. Skipping Dependency Review.')
@@ -55,7 +58,8 @@ async function run(): Promise<void> {
       filteredChanges,
       {
         allow: config.allow_licenses,
-        deny: config.deny_licenses
+        deny: config.deny_licenses,
+        licenseExclusions: config.allow_dependencies_licenses
       }
     )
 
@@ -65,6 +69,10 @@ async function run(): Promise<void> {
       config
     )
 
+    if (snapshot_warnings) {
+      summary.addSnapshotWarnings(snapshot_warnings)
+    }
+
     if (config.vulnerability_check) {
       summary.addChangeVulnerabilitiesToSummary(vulnerableChanges, minSeverity)
       printVulnerabilitiesBlock(vulnerableChanges, minSeverity)

src/schemas.ts

@@ -40,6 +40,7 @@ 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([]),
     license_check: z.boolean().default(true),
     vulnerability_check: z.boolean().default(true),
@@ -73,9 +74,14 @@ 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]

src/summary.ts

@@ -143,6 +143,13 @@ export function addLicensesToSummary(
       `<strong>Denied Licenses</strong>: ${config.deny_licenses.join(', ')}`
     )
   }
+  if (config.allow_dependencies_licenses) {
+    core.summary.addQuote(
+      `<strong>Excluded from license check</strong>: ${config.allow_dependencies_licenses.join(
+        ', '
+      )}`
+    )
+  }
 
   core.debug(
     `found ${invalidLicenseChanges.unlicensed.length} unknown licenses`
@@ -215,6 +222,23 @@ export function addScannedDependencies(changes: Changes): void {
   }
 }
 
+export function addSnapshotWarnings(warnings: string): void {
+  // For now, we want to ignore warnings that just complain
+  // about missing snapshots on the head SHA. This is a product
+  // decision to avoid presenting warnings to users who simply
+  // don't use snapshots.
+  const ignore_regex = new RegExp(/No.*snapshot.*found.*head.*/, 'i')
+  if (ignore_regex.test(warnings)) {
+    return
+  }
+
+  core.summary.addHeading('Snapshot Warnings', 2)
+  core.summary.addQuote(`${icons.warning}: ${warnings}`)
+  core.summary.addRaw(
+    'Re-running this action after a short time may resolve the issue. See the documentation for more information and troubleshooting advice.'
+  )
+}
+
 function countLicenseIssues(
   invalidLicenseChanges: InvalidLicenseChanges
 ): number {

src/utils.ts

@@ -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, [])