Update docs for config file paths.

Co-authored-by: Courtney Claessens <courtneycl@github.com>

.devcontainer/devcontainer.json

@@ -0,0 +1,9 @@
+{
+  "name": "Dependency Review Action",
+  "image": "mcr.microsoft.com/devcontainers/typescript-node:18",
+  "postCreateCommand": "npm install",
+  "remoteUser": "node",
+  "features": {
+    "ghcr.io/devcontainers/features/ruby:1": {}
+  }
+}

.github/workflows/check-dist.yml

@@ -23,10 +23,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Set Node.js 16.x
+      - name: Set Node.js 18.x
         uses: actions/setup-node@v3
         with:
-          node-version: 16.x
+          node-version: 18.x
 
       - name: Install dependencies
         run: npm ci

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 18
           cache: npm
       - name: Install dependencies
         run: npm ci --ignore-scripts
@@ -30,7 +30,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 18
           cache: npm
       - name: Install dependencies
         run: npm ci --ignore-scripts

CONTRIBUTING.md

@@ -38,6 +38,7 @@ _Note_: We don't have any useful tests yet, contributions are welcome!
 
 ## Local Development
 
+It is recommended to have atleast [Node 18](https://nodejs.org/en/) installed.
 We have a script to scan a given PR for vulnerabilities, this will
 help you test your local changes. Make sure to [grab a Personal Access Token (PAT)](https://github.com/settings/tokens) before proceeding (you'll need `repo` permissions for private repos):
 
@@ -56,11 +57,11 @@ $ GITHUB_TOKEN=my-secret-token ./scripts/scan_pr https://github.com/actions/depe
 ```
 
 [Configuration options](README.md#configuration-options) can be set by
-passing an external YAML  [configuration file](README.md#configuration-file) to the
+passing an external YAML [configuration file](README.md#configuration-file) to the
 `scan_pr` script with the `-c`/`--config-file` option:
 
 ```sh
-$ GITHUB_TOKEN=<token> ./scripts/scan_pr --config-file my_custom_config.yml <pr_url> 
+$ GITHUB_TOKEN=<token> ./scripts/scan_pr --config-file my_custom_config.yml <pr_url>
 ```
 
 ## Submitting a pull request

README.md

@@ -71,13 +71,20 @@ or by inlining these options in your workflow file.
 
 ### config-file
 
-A string representing the path to an external configuraton file. By
-default external configuration files are not used.
+A string representing the path to a configuraton file. It can be a
+local file, or a file located in an external repository. You can use
+this syntax for external repositories: `OWNER/REPOSITORY/FILENAME@BRANCH`.
 
-**Possible values**: A string representing the absolute path to the
-configuration file.
+If the configuration file is located in an external private repository,
+use the [external-repo-token](#external-repo-token) parameter of the
+action to specify a token that has read access to the repository.
 
-**Example**: `config-file: ./.github/dependency-review-config.yml`.
+**Possible values**: A string representing a path to a file located
+in the current repository, or in an external one.
+
+**Example**: `config-file: ./.github/dependency-review-config.yml # local file`.
+
+**Example**: `config-file: github/octorepo/dependency-review-config.yml@main # external repo`
 
 ### fail-on-severity
 
@@ -106,19 +113,20 @@ fail-on-scopes:
 
 ### allow-licenses
 
-Only allow the licenses in this list. See "[Licenses](https://github.com/actions/dependency-review-action#licenses)".
+Only allow the licenses that comply with the expressions in this list. See "[Licenses](https://github.com/actions/dependency-review-action#licenses)".
 
-**Possible values**: Any `spdx_id` value(s) from
-https://docs.github.com/en/rest/licenses.
+**Possible values**: A list of of [SPDX-compliant license identifiers](https://spdx.org/licenses/).
 
-**Inline example**: `allow-licenses: BSD-3-Clause, MIT`
+**Inline example**: `allow-licenses: BSD-3-Clause, LGPL-2.1 OR MIT OR BSD-3-Clause`
 
 **YAML example**:
 
 ```yaml
 allow-licenses:
   - BSD-3-Clause
+  - LGPL-2.1
   - MIT
+  - BSD-3-Clause
 ```
 
 ### deny-licenses
@@ -126,24 +134,23 @@ allow-licenses:
 Add a custom list of licenses you want to block. See
 "[Licenses](https://github.com/actions/dependency-review-action#licenses)".
 
-**Possible values**: Any `spdx_id` value(s) from
-https://docs.github.com/en/rest/licenses.
+**Possible values**: Any valid set of [SPDX licenses](https://spdx.org/licenses/).
 
-**Inline example**: `deny-licenses: LGPL-2.0, BSD-2-Clause`
+**Inline example**: `deny-licenses: LGPL-2.0, GPL-2.0+ WITH Bison-exception-2.2`
 
 **YAML example**:
 
 ```yaml
 deny-licenses:
   - LGPL-2.0
-  - BSD-2-Clause
+  - GPL-2.0+ WITH Bison-exception-2.2
 ```
 
 ### allow-ghsas
 
-Add a custom list of GitHub Advisory IDs that can be skipped during detection. 
+A list of GitHub Security Advisory IDs that can be skipped during detection.
 
-**Possible values**: Any valid advisory GHSA ids.
+**Possible values**: Any valid GHSAs from the [GitHub Advisory Database](https://github.com/advisories).
 
 **Inline example**: `allow-ghsas: GHSA-abcd-1234-5679, GHSA-efgh-1234-5679`
 
@@ -155,6 +162,20 @@ allow-ghsas:
   - GHSA-efgh-1234-5679
 ```
 
+### license-check/vulnerability-check
+
+Disable the license checks or vulnerability checks performed by this Action.
+You can't disable both checks.
+
+**Possible values**: `true` or `false`
+
+**Example**:
+
+```yaml
+license-check: true
+vulnerability-check: false
+```
+
 ### base-ref/head-ref
 
 Provide custom git references for the git base/head when performing
@@ -171,6 +192,19 @@ base-ref: 8bb8a58d6a4028b6c2e314d5caaf273f57644896
 head-ref: 69af5638bf660cf218aad5709a4c100e42a2f37b
 ```
 
+### external-repo-token
+
+A token for fetching external configuration files if they live in
+an external private repository.
+
+Visit the [developer settings](https://github.com/settings/tokens) to
+create a new personal access token with `read` permissions for the
+repository that hosts the config file.
+
+**Possible values**: Any GitHub token with read access to the external repository.
+
+**Example**: `external-repo-token: ghp_123456789abcdef...`
+
 ### Configuration File
 
 You can use an external configuration file to specify the settings for
@@ -259,8 +293,8 @@ forbid a subset of licenses. These options are not supported on Enterprise Serve
 
 You can use the [Licenses
 API](https://docs.github.com/en/rest/licenses) to see the full list of
-supported licenses. Use the `spdx_id` field for every license you want
-to filter. A couple of examples:
+supported licenses. Use [SPDX licenses](https://spdx.org/licenses/)
+to filter the licenses. A couple of examples:
 
 ```yaml
 # only allow MIT-licensed dependents
@@ -275,7 +309,7 @@ to filter. A couple of examples:
 - name: Dependency Review
   uses: actions/dependency-review-action@v2
   with:
-    deny-licenses: Apache-1.1, Apache-2.0
+    deny-licenses: Apache-1.1+
 ```
 
 ### Considerations

__tests__/config.test.ts

@@ -1,6 +1,7 @@
 import {expect, test, beforeEach} from '@jest/globals'
-import {readConfig, readConfigFile} from '../src/config'
+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)
@@ -17,6 +18,8 @@ function clearInputs() {
     'ALLOW-LICENSES',
     'DENY-LICENSES',
     'ALLOW-GHSAS',
+    'LICENSE-CHECK',
+    'VULNERABILITY-CHECK',
     'CONFIG-FILE',
     'BASE-REF',
     'HEAD-REF'
@@ -27,48 +30,62 @@ function clearInputs() {
   })
 }
 
+beforeAll(() => {
+  jest.spyOn(Utils, 'isSPDXValid').mockReturnValue(true)
+})
+
 beforeEach(() => {
   clearInputs()
 })
 
 test('it defaults to low severity', async () => {
-  const options = readConfig()
-  expect(options.fail_on_severity).toEqual('low')
+  const config = await readConfig()
+  expect(config.fail_on_severity).toEqual('low')
 })
 
 test('it reads custom configs', async () => {
   setInput('fail-on-severity', 'critical')
   setInput('allow-licenses', ' BSD, GPL 2')
 
-  const options = readConfig()
-  expect(options.fail_on_severity).toEqual('critical')
-  expect(options.allow_licenses).toEqual(['BSD', 'GPL 2'])
+  const config = await readConfig()
+  expect(config.fail_on_severity).toEqual('critical')
+  expect(config.allow_licenses).toEqual(['BSD', 'GPL 2'])
 })
 
 test('it defaults to empty allow/deny lists ', async () => {
-  const options = readConfig()
+  const config = await readConfig()
 
-  expect(options.allow_licenses).toEqual(undefined)
-  expect(options.deny_licenses).toEqual(undefined)
+  expect(config.allow_licenses).toEqual(undefined)
+  expect(config.deny_licenses).toEqual(undefined)
 })
 
 test('it raises an error if both an allow and denylist are specified', async () => {
   setInput('allow-licenses', 'MIT')
   setInput('deny-licenses', 'BSD')
 
-  expect(() => readConfig()).toThrow()
+  await expect(readConfig()).rejects.toThrow(
+    'You cannot specify both allow-licenses and deny-licenses'
+  )
+})
+test('it raises an error if an empty allow list is specified', async () => {
+  setInput('config-file', './__tests__/fixtures/config-empty-allow-sample.yml')
+
+  await expect(readConfig()).rejects.toThrow(
+    'You should provide at least one license in allow-licenses'
+  )
 })
 
 test('it raises an error when given an unknown severity', async () => {
   setInput('fail-on-severity', 'zombies')
-  expect(() => readConfig()).toThrow()
+
+  await expect(readConfig()).rejects.toThrow(/received 'zombies'/)
 })
 
 test('it uses the given refs when the event is not a pull request', async () => {
   setInput('base-ref', 'a-custom-base-ref')
   setInput('head-ref', 'a-custom-head-ref')
 
-  const refs = getRefs(readConfig(), {
+  const refs = getRefs(await readConfig(), {
     payload: {},
     eventName: 'workflow_dispatch'
   })
@@ -77,9 +94,9 @@ test('it uses the given refs when the event is not a pull request', async () =>
 })
 
 test('it raises an error when no refs are provided and the event is not a pull request', async () => {
-  const options = readConfig()
+  const config = await readConfig()
   expect(() =>
-    getRefs(options, {
+    getRefs(config, {
       payload: {},
       eventName: 'workflow_dispatch'
     })
@@ -87,91 +104,150 @@ test('it raises an error when no refs are provided and the event is not a pull r
 })
 
 test('it reads an external config file', async () => {
-  let options = readConfigFile('./__tests__/fixtures/config-allow-sample.yml')
-  expect(options.fail_on_severity).toEqual('critical')
-  expect(options.allow_licenses).toEqual(['BSD', 'GPL 2'])
+  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 the config file was not found', async () => {
-  expect(() => readConfigFile('fixtures/i-dont-exist')).toThrow()
+  setInput('config-file', 'fixtures/i-dont-exist')
+  await expect(readConfig()).rejects.toThrow(/Unable to fetch config file/)
 })
 
 test('it parses options from both sources', async () => {
   setInput('config-file', './__tests__/fixtures/config-allow-sample.yml')
 
-  let options = readConfig()
-  expect(options.fail_on_severity).toEqual('critical')
+  let config = await readConfig()
+  expect(config.fail_on_severity).toEqual('critical')
 
   setInput('base-ref', 'a-custom-base-ref')
-  options = readConfig()
-  expect(options.base_ref).toEqual('a-custom-base-ref')
+  config = await readConfig()
+  expect(config.base_ref).toEqual('a-custom-base-ref')
 })
 
-test('in case of conflicts, the external config is the source of truth', async () => {
+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'
 
-  let options = readConfig()
-  expect(options.fail_on_severity).toEqual('critical')
-
-  // this should not overwite the previous value
-  setInput('fail-on-severity', 'low')
-  options = readConfig()
-  expect(options.fail_on_severity).toEqual('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 options = readConfig()
-  expect(options.allow_licenses).toEqual(undefined)
-  expect(options.deny_licenses).toEqual(undefined)
+  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')
-  options = readConfig()
-  expect(options.fail_on_severity).toEqual('low')
+  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 options = readConfig()
-  expect(options.fail_on_severity).toEqual('critical')
+  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')
-  expect(() => readConfig()).toThrow()
+  await expect(readConfig()).rejects.toThrow()
 })
 
 test('it defaults to runtime scope', async () => {
-  const options = readConfig()
-  expect(options.fail_on_scopes).toEqual(['runtime'])
+  const config = await readConfig()
+  expect(config.fail_on_scopes).toEqual(['runtime'])
 })
 
 test('it parses custom scopes preference', async () => {
   setInput('fail-on-scopes', 'runtime, development')
-  let options = readConfig()
-  expect(options.fail_on_scopes).toEqual(['runtime', 'development'])
+  let config = await readConfig()
+  expect(config.fail_on_scopes).toEqual(['runtime', 'development'])
 
   clearInputs()
   setInput('fail-on-scopes', 'development')
-  options = readConfig()
-  expect(options.fail_on_scopes).toEqual(['development'])
+  config = await readConfig()
+  expect(config.fail_on_scopes).toEqual(['development'])
 })
 
 test('it raises an error when given invalid scope', async () => {
   setInput('fail-on-scopes', 'runtime, zombies')
-  expect(() => readConfig()).toThrow()
+  await expect(readConfig()).rejects.toThrow(/received 'zombies'/)
 })
 
 test('it defaults to an empty GHSA allowlist', async () => {
-  const options = readConfig()
-  expect(options.allow_ghsas).toEqual(undefined)
+  const config = await readConfig()
+  expect(config.allow_ghsas).toEqual([])
 })
 
 test('it successfully parses GHSA allowlist', async () => {
   setInput('allow-ghsas', 'GHSA-abcd-1234-5679, GHSA-efgh-1234-5679')
-  const options = readConfig()
-  expect(options.allow_ghsas).toEqual([
+  const config = await readConfig()
+  expect(config.allow_ghsas).toEqual([
     'GHSA-abcd-1234-5679',
     'GHSA-efgh-1234-5679'
   ])
 })
+
+test('it defaults to checking licenses', async () => {
+  const config = await readConfig()
+  expect(config.license_check).toBe(true)
+})
+
+test('it parses the license-check input', async () => {
+  setInput('license-check', 'false')
+  let config = await readConfig()
+  expect(config.license_check).toEqual(false)
+
+  clearInputs()
+  setInput('license-check', 'true')
+  config = await readConfig()
+  expect(config.license_check).toEqual(true)
+})
+
+test('it defaults to checking vulnerabilities', async () => {
+  const config = await readConfig()
+  expect(config.vulnerability_check).toBe(true)
+})
+
+test('it parses the vulnerability-check input', async () => {
+  setInput('vulnerability-check', 'false')
+  let config = await readConfig()
+  expect(config.vulnerability_check).toEqual(false)
+
+  clearInputs()
+  setInput('vulnerability-check', 'true')
+  config = await readConfig()
+  expect(config.vulnerability_check).toEqual(true)
+})
+
+test('it is not possible to disable both checks', async () => {
+  setInput('license-check', 'false')
+  setInput('vulnerability-check', 'false')
+  await expect(readConfig()).rejects.toThrow(
+    /Can't disable both license-check and vulnerability-check/
+  )
+})
+
+describe('licenses that are not valid SPDX licenses', () => {
+  beforeAll(() => {
+    jest.spyOn(Utils, 'isSPDXValid').mockReturnValue(false)
+  })
+
+  test('it raises an error for invalid licenses in allow-licenses', async () => {
+    setInput('allow-licenses', ' BSD, GPL 2')
+    await expect(readConfig()).rejects.toThrow(
+      'Invalid license(s) in allow-licenses: BSD, GPL 2'
+    )
+  })
+
+  test('it raises an error for invalid licenses in deny-licenses', async () => {
+    setInput('deny-licenses', ' BSD, GPL 2')
+    await expect(readConfig()).rejects.toThrow(
+      'Invalid license(s) in deny-licenses: BSD, GPL 2'
+    )
+  })
+})

__tests__/fixtures/config-empty-allow-sample.yml

@@ -0,0 +1,2 @@
+fail_on_severity: critical
+allow_licenses: []

__tests__/licenses.test.ts

@@ -1,6 +1,7 @@
 import {expect, jest, test} from '@jest/globals'
 import {Change, Changes} from '../src/schemas'
-import {getDeniedLicenseChanges} from '../src/licenses'
+
+let getInvalidLicenseChanges: Function
 
 let npmChange: Change = {
   manifest: 'package.json',
@@ -70,65 +71,83 @@ jest.mock('octokit', () => {
   }
 })
 
-test('it fails if a license outside the allow list is found', async () => {
+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')
+  })
+  ;({getInvalidLicenseChanges} = require('../src/licenses'))
+})
+
+test('it adds license outside the allow list to forbidden changes', async () => {
   const changes: Changes = [npmChange, rubyChange]
-  const [invalidChanges, _] = await getDeniedLicenseChanges(changes, {
+  const {forbidden} = await getInvalidLicenseChanges(changes, {
     allow: ['BSD']
   })
-  expect(invalidChanges[0]).toBe(npmChange)
+  expect(forbidden[0]).toBe(npmChange)
+  expect(forbidden.length).toEqual(1)
 })
 
-test('it fails if a license inside the deny list is found', async () => {
+test('it adds license inside the deny list to forbidden changes', async () => {
   const changes: Changes = [npmChange, rubyChange]
-  const [invalidChanges] = await getDeniedLicenseChanges(changes, {
+  const {forbidden} = await getInvalidLicenseChanges(changes, {
     deny: ['BSD']
   })
-  expect(invalidChanges[0]).toBe(rubyChange)
+  expect(forbidden[0]).toBe(rubyChange)
+  expect(forbidden.length).toEqual(1)
 })
 
-// This is more of a "here's a behavior that might be surprising" than an actual
-// thing we want in the system. Please remove this test after refactoring.
-test('it fails all license checks when allow is provided an empty array', async () => {
-  const changes: Changes = [npmChange, rubyChange]
-  let [invalidChanges, _] = await getDeniedLicenseChanges(changes, {
-    allow: [],
-    deny: ['BSD']
-  })
-  expect(invalidChanges.length).toBe(2)
-})
-
-test('it does not fail if a license outside the allow list is found in removed changes', async () => {
+test('it does not add license outside the allow list to forbidden changes if it is in removed changes', async () => {
   const changes: Changes = [
     {...npmChange, change_type: 'removed'},
     {...rubyChange, change_type: 'removed'}
   ]
-  const [invalidChanges, _] = await getDeniedLicenseChanges(changes, {
+  const {forbidden} = await getInvalidLicenseChanges(changes, {
     allow: ['BSD']
   })
-  expect(invalidChanges).toStrictEqual([])
+  expect(forbidden).toStrictEqual([])
 })
 
-test('it does not fail if a license inside the deny list is found in removed changes', async () => {
+test('it does not add license inside the deny list to forbidden changes if it is in removed changes', async () => {
   const changes: Changes = [
     {...npmChange, change_type: 'removed'},
     {...rubyChange, change_type: 'removed'}
   ]
-  const [invalidChanges, _] = await getDeniedLicenseChanges(changes, {
+  const {forbidden} = await getInvalidLicenseChanges(changes, {
     deny: ['BSD']
   })
-  expect(invalidChanges).toStrictEqual([])
+  expect(forbidden).toStrictEqual([])
 })
 
-test('it fails if a license outside the allow list is found in both of added and removed changes', async () => {
+test('it adds license outside the allow list to forbidden changes if it is in both added and removed changes', async () => {
   const changes: Changes = [
     {...npmChange, change_type: 'removed'},
     npmChange,
     {...rubyChange, change_type: 'removed'}
   ]
-  const [invalidChanges, _] = await getDeniedLicenseChanges(changes, {
+  const {forbidden} = await getInvalidLicenseChanges(changes, {
     allow: ['BSD']
   })
-  expect(invalidChanges).toStrictEqual([npmChange])
+  expect(forbidden).toStrictEqual([npmChange])
+})
+
+test('it adds all licenses to unresolved if it is unable to determine the validity', async () => {
+  jest.resetModules() // reset module set in before
+  jest.doMock('spdx-satisfies', () => {
+    return jest.fn((_first: string, _second: string) => {
+      throw new Error('Some Error')
+    })
+  })
+  ;({getInvalidLicenseChanges} = require('../src/licenses'))
+  const changes: Changes = [npmChange, rubyChange]
+  const invalidLicenses = await getInvalidLicenseChanges(changes, {
+    allow: ['BSD']
+  })
+  expect(invalidLicenses.forbidden.length).toEqual(0)
+  expect(invalidLicenses.unlicensed.length).toEqual(0)
+  expect(invalidLicenses.unresolved.length).toEqual(2)
 })
 
 describe('GH License API fallback', () => {
@@ -138,7 +157,7 @@ describe('GH License API fallback', () => {
       license: null,
       source_repository_url: 'http://github.com/some-owner/some-repo'
     }
-    const [_, unknownChanges] = await getDeniedLicenseChanges(
+    const {unlicensed} = await getInvalidLicenseChanges(
       [nullLicenseChange, rubyChange],
       {}
     )
@@ -147,25 +166,25 @@ describe('GH License API fallback', () => {
       owner: 'some-owner',
       repo: 'some-repo'
     })
-    expect(unknownChanges.length).toEqual(0)
+    expect(unlicensed.length).toEqual(0)
   })
 
   test('it does not call licenses API endpoint for change with null license and invalid source_repository_url ', async () => {
-    const [_, unknownChanges] = await getDeniedLicenseChanges(
+    const {unlicensed} = await getInvalidLicenseChanges(
       [{...npmChange, license: null}],
       {}
     )
     expect(mockOctokit.rest.licenses.getForRepo).not.toHaveBeenCalled()
-    expect(unknownChanges.length).toEqual(1)
+    expect(unlicensed.length).toEqual(1)
   })
 
   test('it does not call licenses API endpoint if licenses for all changes are present', async () => {
-    const [_, unknownChanges] = await getDeniedLicenseChanges(
+    const {unlicensed} = await getInvalidLicenseChanges(
       [npmChange, rubyChange],
       {}
     )
 
     expect(mockOctokit.rest.licenses.getForRepo).not.toHaveBeenCalled()
-    expect(unknownChanges.length).toEqual(0)
+    expect(unlicensed.length).toEqual(0)
   })
 })

action.yml

@@ -21,7 +21,7 @@ inputs:
     description: The head 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
   config-file:
-    description: A filepath to the configuration file for the action.
+    description: A path to the configuration file for the action.
     required: false
   allow-licenses:
     description: Comma-separated list of allowed licenses (e.g. "MIT, GPL 3.0, BSD 2 Clause")
@@ -32,6 +32,10 @@ inputs:
   allow-ghsas:
     description: Comma-separated list of allowed Github Advisory IDs (e.g. "GHSA-abcd-1234-5679, GHSA-efgh-1234-5679")
     required: false
+  external-repo-token:
+    description: A token for fetching external configuration file if it lives in another repository. It is required if the repository is private
+    required: false
+
 runs:
   using: 'node16'
   main: 'dist/index.js'

dist/licenses.txt

@@ -517,6 +517,31 @@ The above copyright notice and this permission notice shall be included in all c
 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.
 
 
+array-find-index
+MIT
+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+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.
+
+
 before-after-hook
 Apache-2.0
                                  Apache License
@@ -1590,6 +1615,89 @@ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
 IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 
+spdx-compare
+MIT
+The MIT License
+
+Copyright (c) 2015 Kyle E. Mitchell
+
+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.
+
+
+spdx-exceptions
+CC-BY-3.0
+
+spdx-expression-parse
+MIT
+The MIT License
+
+Copyright (c) 2015 Kyle E. Mitchell & other authors listed in 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.
+
+
+spdx-license-ids
+CC0-1.0
+
+spdx-ranges
+(MIT AND CC-BY-3.0)
+The MIT License
+
+Copyright (c) 2015 Kyle E. Mitchell
+
+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.
+
+
+spdx-satisfies
+MIT
+The MIT License
+
+Copyright (c) spdx-satisfies.js contributors
+
+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.
+
+
 tr46
 MIT
 

jest.config.js

@@ -1,9 +1,9 @@
 module.exports = {
   clearMocks: true,
-  moduleFileExtensions: ['js', 'ts'],
+  moduleFileExtensions: ['js', 'json', 'ts'],
   testMatch: ['**/*.test.ts'],
   transform: {
     '^.+\\.ts$': 'ts-jest'
   },
   verbose: true
-}
+}

package.json

@@ -27,20 +27,24 @@
   "dependencies": {
     "@actions/core": "^1.10.0",
     "@actions/github": "^5.1.1",
-    "@octokit/plugin-retry": "^3.0.9",
+    "@octokit/plugin-retry": "^4.0.3",
     "@octokit/request-error": "^3.0.2",
     "ansi-styles": "^6.2.1",
     "got": "^12.5.2",
     "nodemon": "^2.0.20",
-    "octokit": "^2.0.9",
+    "octokit": "^2.0.10",
+    "spdx-expression-parse": "^3.0.1",
+    "spdx-satisfies": "^5.0.1",
     "yaml": "^2.1.3",
     "zod": "^3.19.1"
   },
   "devDependencies": {
     "@types/jest": "^27.5.2",
-    "@types/node": "^16.18.0",
-    "@typescript-eslint/eslint-plugin": "^5.40.1",
-    "@typescript-eslint/parser": "^5.40.1",
+    "@types/node": "^16.18.3",
+    "@typescript-eslint/eslint-plugin": "^5.42.0",
+    "@typescript-eslint/parser": "^5.42.0",
+    "@types/spdx-expression-parse": "^3.0.2",
+    "@types/spdx-satisfies": "^0.1.0",
     "@vercel/ncc": "^0.34.0",
     "esbuild-register": "^3.3.3",
     "eslint": "^8.26.0",

src/config.ts

@@ -3,12 +3,62 @@ import path from 'path'
 import YAML from 'yaml'
 import * as core from '@actions/core'
 import * as z from 'zod'
-import {
-  ConfigurationOptions,
-  ConfigurationOptionsSchema,
-  SeveritySchema,
-  SCOPES
-} from './schemas'
+import {ConfigurationOptions, ConfigurationOptionsSchema} from './schemas'
+import {isSPDXValid, octokitClient} from './utils'
+
+type ConfigurationOptionsPartial = Partial<ConfigurationOptions>
+
+export async function readConfig(): Promise<ConfigurationOptions> {
+  const inlineConfig = readInlineConfig()
+
+  const configFile = getOptionalInput('config-file')
+  if (configFile !== undefined) {
+    const externalConfig = await readConfigFile(configFile)
+
+    return ConfigurationOptionsSchema.parse({
+      ...externalConfig,
+      ...inlineConfig
+    })
+  }
+
+  return ConfigurationOptionsSchema.parse(inlineConfig)
+}
+
+function readInlineConfig(): ConfigurationOptionsPartial {
+  const fail_on_severity = getOptionalInput('fail-on-severity')
+  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_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')
+
+  validateLicenses('allow-licenses', allow_licenses)
+  validateLicenses('deny-licenses', deny_licenses)
+
+  const keys = {
+    fail_on_severity,
+    fail_on_scopes,
+    allow_licenses,
+    deny_licenses,
+    allow_ghsas,
+    license_check,
+    vulnerability_check,
+    base_ref,
+    head_ref
+  }
+
+  return Object.fromEntries(
+    Object.entries(keys).filter(([_, value]) => value !== undefined)
+  )
+}
+
+function getOptionalBoolean(name: string): boolean | undefined {
+  const value = core.getInput(name)
+  return value.length > 0 ? core.getBooleanInput(name) : undefined
+}
 
 function getOptionalInput(name: string): string | undefined {
   const value = core.getInput(name)
@@ -23,70 +73,93 @@ function parseList(list: string | undefined): string[] | undefined {
   }
 }
 
-export function readConfig(): ConfigurationOptions {
-  const externalConfig = getOptionalInput('config-file')
-  if (externalConfig !== undefined) {
-    const config = readConfigFile(externalConfig)
-    // the reasoning behind reading the inline config when an external
-    // config file is provided is that we still want to allow users to
-    // pass inline options in the presence of an external config file.
-    const inlineConfig = readInlineConfig()
-    // the external config takes precedence
-    return Object.assign({}, inlineConfig, config)
-  } else {
-    return readInlineConfig()
+function validateLicenses(
+  key: 'allow-licenses' | 'deny-licenses',
+  licenses: string[] | undefined
+): void {
+  if (licenses === undefined) {
+    return
+  }
+  const invalid_licenses = licenses.filter(license => !isSPDXValid(license))
+
+  if (invalid_licenses.length > 0) {
+    throw new Error(
+      `Invalid license(s) in ${key}: ${invalid_licenses.join(', ')}`
+    )
   }
 }
 
-export function readInlineConfig(): ConfigurationOptions {
-  const fail_on_severity = SeveritySchema.parse(
-    getOptionalInput('fail-on-severity')
+async function readConfigFile(
+  filePath: string
+): Promise<ConfigurationOptionsPartial> {
+  // match a remote config (e.g. 'owner/repo/filepath@someref')
+  const format = new RegExp(
+    '(?<owner>[^/]+)/(?<repo>[^/]+)/(?<path>[^@]+)@(?<ref>.*)'
   )
-  const fail_on_scopes = z
-    .array(z.enum(SCOPES))
-    .default(['runtime'])
-    .parse(parseList(getOptionalInput('fail-on-scopes')))
 
-  const allow_licenses = parseList(getOptionalInput('allow-licenses'))
-  const deny_licenses = parseList(getOptionalInput('deny-licenses'))
-
-  if (allow_licenses !== undefined && deny_licenses !== undefined) {
-    throw new Error("Can't specify both allow_licenses and deny_licenses")
-  }
-
-  const allow_ghsas = parseList(getOptionalInput('allow-ghsas'))
-
-  const base_ref = getOptionalInput('base-ref')
-  const head_ref = getOptionalInput('head-ref')
-
-  return {
-    fail_on_severity,
-    fail_on_scopes,
-    allow_licenses,
-    deny_licenses,
-    allow_ghsas,
-    base_ref,
-    head_ref
-  }
-}
-
-export function readConfigFile(filePath: string): ConfigurationOptions {
-  let data
+  let data: string
+  const pieces = format.exec(filePath)
 
   try {
-    data = fs.readFileSync(path.resolve(filePath), 'utf-8')
-  } catch (error: unknown) {
+    if (pieces?.groups && pieces.length === 5) {
+      data = await getRemoteConfig({
+        owner: pieces.groups.owner,
+        repo: pieces.groups.repo,
+        path: pieces.groups.path,
+        ref: pieces.groups.ref
+      })
+    } else {
+      data = fs.readFileSync(path.resolve(filePath), 'utf-8')
+    }
+    return parseConfigFile(data)
+  } catch (error) {
+    core.debug(error as string)
+    throw new Error('Unable to fetch config file')
+  }
+}
+
+function parseConfigFile(configData: string): ConfigurationOptionsPartial {
+  try {
+    const data = YAML.parse(configData)
+    for (const key of Object.keys(data)) {
+      if (key === 'allow-licenses' || key === 'deny-licenses') {
+        validateLicenses(key, data[key])
+      }
+      // get rid of the ugly dashes from the actions conventions
+      if (key.includes('-')) {
+        data[key.replace(/-/g, '_')] = data[key]
+        delete data[key]
+      }
+    }
+    return data
+  } catch (error) {
     throw error
   }
-  data = YAML.parse(data)
-
-  // get rid of the ugly dashes from the actions conventions
-  for (const key of Object.keys(data)) {
-    if (key.includes('-')) {
-      data[key.replace(/-/g, '_')] = data[key]
-      delete data[key]
-    }
-  }
-  const values = ConfigurationOptionsSchema.parse(data)
-  return values
+}
+
+async function getRemoteConfig(configOpts: {
+  [key: string]: string
+}): Promise<string> {
+  try {
+    const {data} = await octokitClient(
+      'external-repo-token',
+      false
+    ).rest.repos.getContent({
+      mediaType: {
+        format: 'raw'
+      },
+      owner: configOpts.owner,
+      repo: configOpts.repo,
+      path: configOpts.path,
+      ref: configOpts.ref
+    })
+
+    // When using mediaType.format = 'raw', the response.data is a string
+    // but this is not reflected in the return type of getContent, so we're
+    // casting the return value to a string.
+    return z.string().parse(data as unknown)
+  } catch (error) {
+    core.debug(error as string)
+    throw new Error('Error fetching remote config file')
+  }
 }

src/licenses.ts

@@ -1,6 +1,6 @@
-import * as core from '@actions/core'
-import {Octokit} from 'octokit'
-import {Change} from './schemas'
+import spdxSatisfies from 'spdx-satisfies'
+import {Change, Changes} from './schemas'
+import {isSPDXValid, octokitClient} from './utils'
 
 /**
  * Loops through a list of changes, filtering and returning the
@@ -12,60 +12,73 @@ import {Change} from './schemas'
  * 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.
- * @returns {Promise<[Array.<Change>, Array.<Change>]>} A promise to a 2 element tuple. The first element is the list of denied changes and the second one is the list of changes with unknown 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 async function getDeniedLicenseChanges(
+export async function getInvalidLicenseChanges(
   changes: Change[],
   licenses: {
     allow?: string[]
     deny?: string[]
   }
-): Promise<[Change[], Change[]]> {
+): Promise<Record<string, Changes>> {
   const {allow, deny} = licenses
 
-  const disallowed: Change[] = []
-  const unknown: Change[] = []
+  const groupedChanges = await groupChanges(changes)
+  const licensedChanges: Changes = groupedChanges.licensed
 
-  const consolidatedChanges = changes.some(
-    ({source_repository_url, license}) => !license && source_repository_url
-  )
-    ? await setGHLicenses(changes)
-    : changes
+  const invalidLicenseChanges: Record<string, Changes> = {
+    unlicensed: groupedChanges.unlicensed,
+    unresolved: [],
+    forbidden: []
+  }
 
-  for (const change of consolidatedChanges) {
-    if (change.change_type === 'removed') {
-      continue
-    }
+  const validityCache = new Map<string, boolean>()
 
+  for (const change of licensedChanges) {
     const license = change.license
+
+    // should never happen since licensedChanges always have licenses but license is nullable in changes schema
     if (license === null) {
-      unknown.push(change)
       continue
     }
-    if (allow !== undefined) {
-      if (!allow.includes(license)) {
-        disallowed.push(change)
-      }
-    } else if (deny !== undefined) {
-      if (deny.includes(license)) {
-        disallowed.push(change)
+
+    if (license === 'NOASSERTION') {
+      invalidLicenseChanges.unlicensed.push(change)
+    } else if (validityCache.get(license) === undefined) {
+      try {
+        if (allow !== undefined) {
+          const found = allow.find(spdxExpression =>
+            spdxSatisfies(license, spdxExpression)
+          )
+          validityCache.set(license, found !== undefined)
+        } else if (deny !== undefined) {
+          const found = deny.find(spdxExpression =>
+            spdxSatisfies(license, spdxExpression)
+          )
+          validityCache.set(license, found === undefined)
+        }
+      } catch (err) {
+        invalidLicenseChanges.unresolved.push(change)
       }
     }
+
+    if (validityCache.get(license) === false) {
+      invalidLicenseChanges.forbidden.push(change)
+    }
   }
 
-  return [disallowed, unknown]
+  return invalidLicenseChanges
 }
 
 const fetchGHLicense = async (
   owner: string,
   repo: string
 ): Promise<string | null> => {
-  const octokit = new Octokit({
-    auth: core.getInput('repo-token', {required: true})
-  })
-
   try {
-    const response = await octokit.rest.licenses.getForRepo({owner, repo})
+    const response = await octokitClient().rest.licenses.getForRepo({
+      owner,
+      repo
+    })
     return response.data.license?.spdx_id ?? null
   } catch (_) {
     return null
@@ -108,3 +121,54 @@ const setGHLicenses = async (changes: Change[]): Promise<Change[]> => {
 
   return Promise.all(updatedChanges)
 }
+// Currently Dependency Graph licenses are truncated to 255 characters
+// This possibly makes them invalid spdx ids
+const truncatedDGLicense = (license: string): boolean =>
+  license.length === 255 && !isSPDXValid(license)
+
+async function groupChanges(
+  changes: Changes
+): Promise<Record<string, Changes>> {
+  const result: Record<string, Changes> = {
+    licensed: [],
+    unlicensed: []
+  }
+
+  const ghChanges = []
+
+  for (const change of changes) {
+    if (change.change_type === 'removed') {
+      continue
+    }
+
+    if (change.license === null) {
+      if (change.source_repository_url !== null) {
+        ghChanges.push(change)
+      } else {
+        result.unlicensed.push(change)
+      }
+    } else {
+      if (
+        truncatedDGLicense(change.license) &&
+        change.source_repository_url !== null
+      ) {
+        ghChanges.push(change)
+      } else {
+        result.licensed.push(change)
+      }
+    }
+  }
+
+  if (ghChanges.length > 0) {
+    const ghLicenses = await setGHLicenses(ghChanges)
+    for (const change of ghLicenses) {
+      if (change.license === null) {
+        result.unlicensed.push(change)
+      } else {
+        result.licensed.push(change)
+      }
+    }
+  }
+
+  return result
+}

src/main.ts

@@ -10,7 +10,7 @@ import {
   filterChangesByScopes,
   filterAllowedAdvisories
 } from '../src/filter'
-import {getDeniedLicenseChanges} from './licenses'
+import {getInvalidLicenseChanges} from './licenses'
 import * as summary from './summary'
 import {getRefs} from './git-refs'
 
@@ -18,7 +18,7 @@ import {groupDependenciesByManifest} from './utils'
 
 async function run(): Promise<void> {
   try {
-    const config = readConfig()
+    const config = await readConfig()
     const refs = getRefs(config, github.context)
 
     const changes = await dependencyGraph.compare({
@@ -28,7 +28,7 @@ async function run(): Promise<void> {
       headRef: refs.head
     })
 
-    const minSeverity = config.fail_on_severity as Severity
+    const minSeverity = config.fail_on_severity
     const scopedChanges = filterChangesByScopes(config.fail_on_scopes, changes)
     const filteredChanges = filterAllowedAdvisories(
       config.allow_ghsas,
@@ -45,7 +45,7 @@ async function run(): Promise<void> {
         change.vulnerabilities.length > 0
     )
 
-    const [licenseErrors, unknownLicenses] = await getDeniedLicenseChanges(
+    const invalidLicenseChanges = await getInvalidLicenseChanges(
       filteredChanges,
       {
         allow: config.allow_licenses,
@@ -53,13 +53,21 @@ async function run(): Promise<void> {
       }
     )
 
-    summary.addSummaryToSummary(addedChanges, licenseErrors, unknownLicenses)
-    summary.addChangeVulnerabilitiesToSummary(addedChanges, minSeverity)
-    summary.addLicensesToSummary(licenseErrors, unknownLicenses, config)
-    summary.addScannedDependencies(changes)
+    summary.addSummaryToSummary(
+      config.vulnerability_check ? addedChanges : null,
+      config.license_check ? invalidLicenseChanges : null
+    )
 
-    printVulnerabilitiesBlock(addedChanges, minSeverity)
-    printLicensesBlock(licenseErrors, unknownLicenses)
+    if (config.vulnerability_check) {
+      summary.addChangeVulnerabilitiesToSummary(addedChanges, minSeverity)
+      printVulnerabilitiesBlock(addedChanges, minSeverity)
+    }
+    if (config.license_check) {
+      summary.addLicensesToSummary(invalidLicenseChanges, config)
+      printLicensesBlock(invalidLicenseChanges)
+    }
+
+    summary.addScannedDependencies(changes)
     printScannedDependencies(changes)
   } catch (error) {
     if (error instanceof RequestError && error.status === 404) {
@@ -83,7 +91,7 @@ async function run(): Promise<void> {
 }
 
 function printVulnerabilitiesBlock(
-  addedChanges: Change[],
+  addedChanges: Changes,
   minSeverity: Severity
 ): void {
   let failed = false
@@ -119,24 +127,28 @@ function printChangeVulnerabilities(change: Change): void {
 }
 
 function printLicensesBlock(
-  licenseErrors: Change[],
-  unknownLicenses: Change[]
+  invalidLicenseChanges: Record<string, Changes>
 ): void {
   core.group('Licenses', async () => {
-    if (licenseErrors.length > 0) {
-      printLicensesError(licenseErrors)
+    if (invalidLicenseChanges.forbidden.length > 0) {
+      core.info('\nThe following dependencies have incompatible licenses:')
+      printLicensesError(invalidLicenseChanges.forbidden)
       core.setFailed('Dependency review detected incompatible licenses.')
     }
-    printNullLicenses(unknownLicenses)
+    if (invalidLicenseChanges.unresolved.length > 0) {
+      core.warning(
+        '\nThe validity of the licenses of the dependencies below could not be determined. Ensure that they are valid SPDX licenses:'
+      )
+      printLicensesError(invalidLicenseChanges.unresolved)
+      core.setFailed(
+        'Dependency review could not detect the validity of all licenses.'
+      )
+    }
+    printNullLicenses(invalidLicenseChanges.unlicensed)
   })
 }
 
-function printLicensesError(changes: Change[]): void {
-  if (changes.length === 0) {
-    return
-  }
-
-  core.info('\nThe following dependencies have incompatible licenses:\n')
+function printLicensesError(changes: Changes): void {
   for (const change of changes) {
     core.info(
       `${styles.bold.open}${change.manifest} » ${change.name}@${change.version}${styles.bold.close} – License: ${styles.color.red.open}${change.license}${styles.color.red.close}`
@@ -144,12 +156,12 @@ function printLicensesError(changes: Change[]): void {
   }
 }
 
-function printNullLicenses(changes: Change[]): void {
+function printNullLicenses(changes: Changes): void {
   if (changes.length === 0) {
     return
   }
 
-  core.info('\nWe could not detect a license for the following dependencies:\n')
+  core.info('\nWe could not detect a license for the following dependencies:')
   for (const change of changes) {
     core.info(
       `${styles.bold.open}${change.manifest} » ${change.name}@${change.version}${styles.bold.close}`

src/schemas.ts

@@ -38,18 +38,38 @@ export const ConfigurationOptionsSchema = z
   .object({
     fail_on_severity: SeveritySchema,
     fail_on_scopes: z.array(z.enum(SCOPES)).default(['runtime']),
-    allow_licenses: z.array(z.string()).default([]),
-    deny_licenses: z.array(z.string()).default([]),
+    allow_licenses: z.array(z.string()).optional(),
+    deny_licenses: z.array(z.string()).optional(),
     allow_ghsas: z.array(z.string()).default([]),
-    config_file: z.string().optional().default('false'),
-    base_ref: z.string(),
-    head_ref: z.string()
+    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()
+  })
+  .superRefine((config, context) => {
+    if (config.allow_licenses && config.deny_licenses) {
+      context.addIssue({
+        code: z.ZodIssueCode.custom,
+        message: 'You cannot specify both allow-licenses and deny-licenses'
+      })
+    }
+    if (config.allow_licenses && config.allow_licenses.length < 1) {
+      context.addIssue({
+        code: z.ZodIssueCode.custom,
+        message: 'You should provide at least one license in allow-licenses'
+      })
+    }
+    if (
+      config.license_check === false &&
+      config.vulnerability_check === false
+    ) {
+      context.addIssue({
+        code: z.ZodIssueCode.custom,
+        message: "Can't disable both license-check and vulnerability-check"
+      })
+    }
   })
-  .partial()
-  .refine(
-    obj => !(obj.allow_licenses && obj.deny_licenses),
-    'Your workflow file has both an allow_licenses list and deny_licenses list, but you can only set one or the other.'
-  )
 
 export const ChangesSchema = z.array(ChangeSchema)
 

src/summary.ts

@@ -1,18 +1,27 @@
 import * as core from '@actions/core'
-import {ConfigurationOptions, Change, Changes} from './schemas'
+import {ConfigurationOptions, Changes} from './schemas'
 import {SummaryTableRow} from '@actions/core/lib/summary'
 import {groupDependenciesByManifest, getManifestsSet, renderUrl} from './utils'
 
 export function addSummaryToSummary(
-  addedPackages: Changes,
-  licenseErrors: Change[],
-  unknownLicenses: Change[]
+  addedPackages: Changes | null,
+  invalidLicenseChanges: Record<string, Changes> | null
 ): void {
   core.summary
     .addHeading('Dependency Review')
-    .addRaw(
-      `We found ${addedPackages.length} vulnerable package(s), ${licenseErrors.length} package(s) with incompatible licenses, and ${unknownLicenses.length} package(s) with unknown licenses.`
-    )
+    .addRaw('We found:')
+    .addList([
+      ...(addedPackages
+        ? [`${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.`
+          ]
+        : [])
+    ])
 }
 
 export function addChangeVulnerabilitiesToSummary(
@@ -76,8 +85,7 @@ export function addChangeVulnerabilitiesToSummary(
 }
 
 export function addLicensesToSummary(
-  licenseErrors: Change[],
-  unknownLicenses: Change[],
+  invalidLicenseChanges: Record<string, Changes>,
   config: ConfigurationOptions
 ): void {
   core.summary.addHeading('Licenses')
@@ -93,62 +101,59 @@ export function addLicensesToSummary(
     )
   }
 
-  if (licenseErrors.length === 0 && unknownLicenses.length === 0) {
+  if (Object.values(invalidLicenseChanges).every(item => item.length === 0)) {
     core.summary.addQuote('No license violations detected.')
     return
   }
 
-  if (licenseErrors.length > 0) {
-    const rows: SummaryTableRow[] = []
-    const manifests = getManifestsSet(licenseErrors)
+  core.debug(
+    `found ${invalidLicenseChanges.unlicensed.length} unknown licenses`
+  )
 
-    core.summary.addHeading('Incompatible Licenses', 3).addSeparator()
+  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)
 
     for (const manifest of manifests) {
       core.summary.addHeading(`<em>${manifest}</em>`, 4)
 
-      for (const change of licenseErrors.filter(
-        pkg => pkg.manifest === manifest
-      )) {
+      for (const change of changes.filter(pkg => pkg.manifest === manifest)) {
         rows.push([
           renderUrl(change.source_repository_url, change.name),
           change.version,
-          change.license || ''
+          formatLicense(change.license)
         ])
       }
+
       core.summary.addTable([['Package', 'Version', 'License'], ...rows])
     }
   } else {
-    core.summary.addQuote('No license violations detected.')
+    core.summary.addQuote(`No ${heading.toLowerCase()} detected.`)
   }
+}
 
-  core.debug(`found ${unknownLicenses.length} unknown licenses`)
-
-  if (unknownLicenses.length > 0) {
-    const rows: SummaryTableRow[] = []
-    const manifests = getManifestsSet(unknownLicenses)
-
-    core.debug(
-      `found ${manifests.entries.length} manifests for unknown licenses`
-    )
-
-    core.summary.addHeading('Unknown Licenses', 3).addSeparator()
-
-    for (const manifest of manifests) {
-      core.summary.addHeading(`<em>${manifest}</em>`, 4)
-
-      for (const change of unknownLicenses.filter(
-        pkg => pkg.manifest === manifest
-      )) {
-        rows.push([
-          renderUrl(change.source_repository_url, change.name),
-          change.version
-        ])
-      }
-
-      core.summary.addTable([['Package', 'Version'], ...rows])
-    }
+function formatLicense(license: string | null): string {
+  if (license === null || license === 'NOASSERTION') {
+    return 'Null'
   }
+  return license
 }
 
 export function addScannedDependencies(changes: Changes): void {
@@ -157,7 +162,7 @@ export function addScannedDependencies(changes: Changes): void {
 
   const summary = core.summary
     .addHeading('Scanned Dependencies')
-    .addRaw(`We scanned ${dependencies.size} manifest files:`)
+    .addHeading(`We scanned ${dependencies.size} manifest files:`, 5)
 
   for (const manifest of manifests) {
     const deps = dependencies.get(manifest)
@@ -165,7 +170,7 @@ export function addScannedDependencies(changes: Changes): void {
       const dependencyNames = deps.map(
         dependency => `<li>${dependency.name}@${dependency.version}</li>`
       )
-      summary.addRaw(`<h3>${manifest}</h3><ul>${dependencyNames.join('')}</ul>`)
+      summary.addDetails(manifest, `<ul>${dependencyNames.join('')}</ul>`)
     }
   }
 }

src/utils.ts

@@ -1,3 +1,6 @@
+import * as core from '@actions/core'
+import {Octokit} from 'octokit'
+import spdxParse from 'spdx-expression-parse'
 import {Changes} from './schemas'
 
 export function groupDependenciesByManifest(
@@ -28,3 +31,25 @@ export function renderUrl(url: string | null, text: string): string {
     return text
   }
 }
+
+export function isSPDXValid(license: string): boolean {
+  try {
+    spdxParse(license)
+    return true
+  } catch (_) {
+    return false
+  }
+}
+
+export function octokitClient(token = 'repo-token', required = true): Octokit {
+  const opts: Record<string, unknown> = {}
+
+  // auth is only added if token is present. For remote config files in public
+  // repos the token is optional, so it could be undefined.
+  const auth = core.getInput(token, {required})
+  if (auth !== undefined) {
+    opts['auth'] = auth
+  }
+
+  return new Octokit(opts)
+}