Handling CLCs and DCOs via GitHub Action

Streamline your workflow and let this GitHub Action (a lite version of CLC Assistant) handle the legal side of contributions to a repository for you. CLC assistant GitHub action enables contributors to sign CLCs from within a pull request. With this GitHub Action we could get rid of the need for a centrally managed database by storing the contributor's signature data in a decentralized way - in the same repository's file system or in a remote repository which can be even a private repository.

Features

1. decentralized data storage
2. fully integrated within github environment
3. no User Interface is required
4. contributors can sign the CLC or DCO by just posting a Pull Request comment
5. signatures will be stored in a file inside the repository or in a remote repository
6. signatures can also be stored inside a private repository
7. versioning of signatures

Configure Contributor License Agreement within two minutes

1. Add the following Workflow File to your repository in this path.github/workflows/clc.yml

name: 'CLC Assistant'
on:
  issue_comment:
    types: [created]
  pull_request_target:
    types: [opened, closed, synchronize]

# explicitly configure permissions, in case your GITHUB_TOKEN workflow permissions are set to read-only in repository settings
permissions:
  actions: write
  contents: write # this can be 'read' if the signatures are in remote repository
  pull-requests: write
  statuses: write

jobs:
  CLCAssistant:
    runs-on: ubuntu-latest
    steps:
      - name: 'CLC Assistant'
        if: (github.event.comment.body == 'recheck' || github.event.comment.body == 'I have read the CLC Document and I hereby sign the CLC') || github.event_name == 'pull_request_target'
        uses: contributor-assistant/[email protected]
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          # the below token should have repo scope and must be manually added by you in the repository's secret
          # This token is required only if you have configured to store the signatures in a remote repository/organization
          PERSONAL_ACCESS_TOKEN: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
        with:
          path-to-signatures: 'signatures/version1/clc.json'
          path-to-document: 'https://github.com/clc-assistant/github-action/blob/master/SAPCLC.md' # e.g. a CLC or a DCO document
          # branch should not be protected
          branch: 'main'
          allowlist: user1,bot*

          # the followings are the optional inputs - If the optional inputs are not given, then default values will be taken
          #remote-organization-name: enter the remote organization name where the signatures should be stored (Default is storing the signatures in the same repository)
          #remote-repository-name: enter the  remote repository name where the signatures should be stored (Default is storing the signatures in the same repository)
          #create-file-commit-message: 'For example: Creating file for storing CLC Signatures'
          #signed-commit-message: 'For example: $contributorName has signed the CLC in $owner/$repo#$pullRequestNo'
          #custom-notsigned-prcomment: 'pull request comment with Introductory message to ask new contributors to sign'
          #custom-pr-sign-comment: 'The signature to be committed in order to sign the CLC'
          #custom-allsigned-prcomment: 'pull request comment when all contributors has signed, defaults to **CLC Assistant Lite bot** All Contributors have signed the CLC.'
          #lock-pullrequest-aftermerge: false - if you don't want this bot to automatically lock the pull request after merging (default - true)
          #use-dco-flag: true - If you are using DCO instead of CLC

Demo for step 1

2. Pull Request event triggers CLC Workflow

CLC action workflow will be triggered on all Pull Request opened, synchronize, closed. This workflow will always run in the base repository and that's why we are making use of the pull_request_target event.
When the CLC workflow is triggered on pull request closed event, it will lock the Pull Request conversation after the Pull Request merge so that the contributors cannot modify or delete the signatures (Pull Request comment) later. This feature is optional.

3. Signing the CLC

CLC workflow creates a comment on Pull Request asking contributors who have not signed CLC to sign and also fails the pull request status check with a failure. The contributors are requested to sign the CLC within the pull request by copy and pasting "I have read the CLC Document and I hereby sign the CLC" as a Pull Request comment like below. If the contributor has already signed the CLC, then the PR status will pass with success.

Demo for step 2 and 3

4. Signatures stored in a JSON file

After the contributor signed a CLC, the contributor's signature with metadata will be stored in a JSON file inside the repository and you can specify the custom path to this file with path-to-signatures input in the workflow.
The default path is path-to-signatures: 'signatures/version1/clc.json'.

The signature can be also stored in a remote repository which can be done by enabling the optional inputs remote-organization-name: <your org name> and remote-repository-name: <your repo name> in your CLC workflow file.

NOTE: You do not need to create this file manually. Our workflow will create the signature file if it does not already exist. Manually creating this file will cause the workflow to fail.

Demo for step 4

5. Users and bots in allowlist

If a GitHub username is included in the allowlist, they will not be required to sign a CLC. You can make use of this feature If you don't want your colleagues working in the same team/organisation to sign a CLC. And also, since there's no way for bot users (such as Dependabot or Greenkeeper) to sign a CLC, you may want to add them in allowlist. You can do so by adding their names in a comma separated string to the allowlist input in the CLC workflow file(in this case dependabot[bot],greenkeeper[bot]). You can also use wildcard symbol in case you want to allow all bot users something like bot*.

Demo for step 5

6. Adding Personal Access Token as a Secret

You have to create a Repository Secret with the name PERSONAL_ACCESS_TOKEN. This PAT should have repo scope and is only required if you have configured to store the signatures in a remote repository/organization.

Demo for step 6

Environmental Variables:

Name	Requirement	Description
GITHUB_TOKEN	required	Usage: GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}, CLC Action uses this in-built GitHub token to make the API calls for interacting with GitHub. It is built into Github Actions and does not need to be manually specified in your secrets store. More Info
PERSONAL_ACCESS_TOKEN	required	Usage: PERSONAL_ACCESS_TOKEN : ${{ secrets.PERSONAL_ACCESS_TOKEN}}, you have to create a Personal Access Token with repo scope and store in the repository's secrets.

Inputs Description:

Name	Requirement	Description	Example
path-to-document	required	provide full URL https://<clcfile> to the document which shall be signed by the contributor(s) It can be any file e.g. inside the repository or it can be a gist.	https://github.com/clc-assistant/github-action/blob/master/SAPCLC.md
path-to-signatures	optional	Path to the JSON file where all the signatures of the contributors will be stored inside the repository.	signatures/version1/clc.json
branch	optional	Branch in which all the signatures of the contributors will be stored and Default branch is master.	master
allowlist	optional	You can specify users and bots to be added in allowlist.	user1,user2,bot*
remote-repository-name	optional	provide the remote repository name where all the signatures should be stored .	remote repository name
remote-organization-name	optional	provide the remote organization name where all the signatures should be stored.	remote organization name
create-file-commit-message	optional	Commit message when a new CLC file is created.	Creating file for storing CLC Signatures.
signed-commit-message	optional	Commit message when a new contributor signs the CLC in a Pull Request.	$contributorName has signed the CLC in $pullRequestNo
custom-notsigned-prcomment	optional	Introductory Pull Request comment to ask new contributors to sign.	Thank you for your contribution and please kindly read and sign our $pathToCLCDocument
custom-pr-sign-comment	optional	The signature to be committed in order to sign the CLC.	I have read the Developer Terms Document and I hereby accept the Terms
custom-allsigned-prcomment	optional	pull request comment when everyone has signed	All Contributors have signed the CLC.
lock-pullrequest-aftermerge	optional	Boolean input for locking the pull request after merging. Default is set to true. It is highly recommended to lock the Pull Request after merging so that the Contributors won't be able to revoke their signature comments after merge	false

Contributors

Mateusz Boś	Michael Spengler	Akshay Iyyadurai Balasundaram	Anand Chowdhary	Filip Moroz	Mikhail
Peter Schmalfeldt	Matt Rosno	Or Geva	Robert Pająk	Scott Brenner	Silvio
Andrew Lohr	Charlie Fish	Darrell Warde	Jan Holthuis	Nathan Walters	Rokas Kupstys
Shun Kakinoki	Simon Meggle	Tate Berenbaum	Timo Tijhof	Andrew Gable	Knanao
Peter	Self Not Found	Woyaoshunlibiye	Yahav Itzhak

License

Contributor License Agreement assistant

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.