Update v1 dependencies

Minor refactor to set url via git params

.github/workflows/create-pull-request-multi.yml

@@ -0,0 +1,46 @@
+name: Create Pull Request All Platforms
+on:
+  repository_dispatch:
+    types: [create-pull-request-multi]
+jobs:
+  createPullRequest:
+    name: Testing on ${{ matrix.platform }}
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - uses: actions/checkout@v1
+      - name: Create report file
+        if:  matrix.platform == 'ubuntu-latest' || matrix.platform == 'macos-latest'
+        run: date +%s > report.txt
+      - name: Create report file (windows)
+        if:  matrix.platform == 'windows-latest'
+        run: echo %DATE% %TIME% > report.txt
+      - name: Create Pull Request
+        id: cpr
+        uses: ./
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: Add report file
+          author-email: peter-evans@users.noreply.github.com
+          author-name: Peter Evans
+          title: '[Example] Add report file'
+          body: |
+            New report
+            - Contains *today's* date
+            - Auto-generated by [create-pull-request][1]
+
+            [1]: https://github.com/peter-evans/create-pull-request
+          labels: report, automated pr
+          assignees: peter-evans
+          reviewers: peter-evans
+          milestone: 1
+          project: Example Project
+          project-column: To do
+          branch: example-patches
+          branch-suffix: random
+      - name: Check outputs
+        run: |
+          echo "Pull Request Number - ${{ env.PULL_REQUEST_NUMBER }}"
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pr_number }}"

.github/workflows/create-pull-request.yml

@@ -0,0 +1,38 @@
+name: Create Pull Request
+on:
+  repository_dispatch:
+    types: [create-pull-request]
+jobs:
+  createPullRequest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Create report file
+        run: date +%s > report.txt
+      - name: Create Pull Request
+        id: cpr
+        uses: ./
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: Add report file
+          author-email: peter-evans@users.noreply.github.com
+          author-name: Peter Evans
+          title: '[Example] Add report file'
+          body: |
+            New report
+            - Contains *today's* date
+            - Auto-generated by [create-pull-request][1]
+
+            [1]: https://github.com/peter-evans/create-pull-request
+          labels: report, automated pr
+          assignees: peter-evans
+          reviewers: peter-evans
+          milestone: 1
+          project: Example Project
+          project-column: To do
+          branch: example-patches
+          branch-suffix: short-commit-hash
+      - name: Check outputs
+        run: |
+          echo "Pull Request Number - ${{ env.PULL_REQUEST_NUMBER }}"
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pr_number }}"

.github/workflows/dockerhub-description.yml

@@ -0,0 +1,19 @@
+name: Update Docker Hub Description
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - README.md
+      - .github/workflows/dockerhub-description.yml
+jobs:
+  dockerHubDescription:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Docker Hub Description
+      uses: peter-evans/dockerhub-description@v2.1.0
+      env:
+        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+        DOCKERHUB_REPOSITORY: peterevans/create-pull-request

.github/workflows/push.yml

@@ -1,21 +0,0 @@
-on: push
-name: create-pull-request action testing workflow
-jobs:
-  createPullRequest:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@master
-    - name: Create report file
-      uses: finnp/create-file-action@1.0.0
-      env:
-        FILE_DATA: This is created to test create-pull-request action.
-        FILE_NAME: report.txt
-    - name: Create Pull Request
-      uses: ./
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        REPO_ACCESS_TOKEN: ${{ secrets.REPO_ACCESS_TOKEN }}
-        COMMIT_MESSAGE: Add report file
-        PULL_REQUEST_BODY: This PR is auto-generated by [create-pull-request](https://github.com/peter-evans/create-pull-request).
-        PULL_REQUEST_BRANCH: test-patches
-        PULL_REQUEST_TITLE: '[Test] Add report file'

.github/workflows/slash-command-dispatch.yml

@@ -0,0 +1,16 @@
+name: Slash Command Dispatch
+on:
+  issue_comment:
+    types: [created]
+jobs:
+  slashCommandDispatch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Slash Command Dispatch
+        uses: peter-evans/slash-command-dispatch@v1
+        with:
+          token: ${{ secrets.REPO_ACCESS_TOKEN }}
+          reaction-token: ${{ secrets.GITHUB_TOKEN }}
+          commands: test, clean
+          permission: admin
+          repository: peter-evans/create-pull-request-tests

.gitignore

@@ -0,0 +1,6 @@
+__pycache__
+.python-version
+
+node_modules
+
+.DS_Store

Dockerfile

@@ -1,18 +0,0 @@
-FROM python:3.7.3
-
-LABEL maintainer="Peter Evans <mail@peterevans.dev>"
-LABEL repository="https://github.com/peter-evans/create-pull-request"
-LABEL homepage="https://github.com/peter-evans/create-pull-request"
-
-LABEL com.github.actions.name="Create Pull Request"
-LABEL com.github.actions.description="Creates a pull request for changes to your repository in the actions workspace"
-LABEL com.github.actions.icon="git-pull-request"
-LABEL com.github.actions.color="gray-dark"
-
-COPY LICENSE README.md /
-
-COPY requirements.txt /tmp/
-RUN pip install --requirement /tmp/requirements.txt
-
-COPY create-pull-request.py /create-pull-request.py
-ENTRYPOINT [ "/create-pull-request.py" ]

README.md

@@ -1,79 +1,162 @@
-# Create Pull Request
+# <img width="24" height="24" src="assets/logo.svg"> Create Pull Request
 [![GitHub Marketplace](https://img.shields.io/badge/Marketplace-Create%20Pull%20Request-blue.svg?colorA=24292e&colorB=0366d6&style=flat&longCache=true&logo=data:image/png;base64,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)](https://github.com/marketplace/actions/create-pull-request)
 
 A GitHub action to create a pull request for changes to your repository in the actions workspace.
 
-Changes to a repository in the actions workspace persist between actions in a workflow.
-This action is designed to be used in conjunction with other actions that modify or add files to your repository.
+Changes to a repository in the Actions workspace persist between steps in a workflow.
+This action is designed to be used in conjunction with other steps that modify or add files to your repository.
 The changes will be automatically committed to a new branch and a pull request created.
 
 Create Pull Request action will:
 
-1. Check for repository changes in the actions workspace. This includes untracked (new) files as well as modified files.
-2. Commit all changes to a new branch. The commit will be made using the name and email of the `HEAD` commit author.
+1. Check for repository changes in the Actions workspace. This includes untracked (new) files as well as modified files.
+2. Commit all changes to a new branch, or update an existing pull request branch.
 3. Create a pull request to merge the new branch into the currently active branch executing the workflow.
 
-Note: Modifying a repository during workflows is not good practice in general.
-However, this action opens up some interesting possibilities when used carefully.
-This action is experimental and may not work well for repositories that have a very high frequency of commits.
-
 ## Usage
 
-In addition to the default `GITHUB_TOKEN`, the action requires a `repo` scoped token in order to commit.
-Create one [here](https://github.com/settings/tokens) and pass that as a secret to the `REPO_ACCESS_TOKEN` environment variable.
+See [examples](examples.md) for detailed use cases.
 
 ```yml
-    - name: Create Pull Request
-      uses: peter-evans/create-pull-request@v1.1.2
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        REPO_ACCESS_TOKEN: ${{ secrets.REPO_ACCESS_TOKEN }}
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
 ```
 
-#### Environment variables
+You can also pin to a [specific release](https://github.com/peter-evans/create-pull-request/releases) version in the format `@v1.x.x`
 
-These variables are all optional. If not set, a default value will be used.
+**Note**: If you want pull requests created by this action to trigger an `on: pull_request` workflow then you must use a [Personal Access Token](https://help.github.com/en/articles/creating-a-personal-access-token-for-the-command-line) instead of the default `GITHUB_TOKEN`.
+See [this issue](https://github.com/peter-evans/create-pull-request/issues/48) for further details.
 
-- `PULL_REQUEST_BRANCH` - The branch name. See **Branch naming** below for details.
-- `COMMIT_MESSAGE` - The message to use when committing changes.
-- `PULL_REQUEST_TITLE` - The title of the pull request.
-- `PULL_REQUEST_BODY` - The body of the pull request.
+### Action inputs
 
-#### Branch naming
+These inputs are *all optional*. If not set, sensible default values will be used.
 
-The variable `PULL_REQUEST_BRANCH` defaults to `create-pull-request/patch`.
-Commits will be made to a branch with this name and suffixed with the short SHA1 commit hash.
+| Name | Description | Default |
+| --- | --- | --- |
+| `commit-message` | The message to use when committing changes. | `Auto-committed changes by create-pull-request action` |
+| `author-name` | The name of the commit author. | For `push` events, the HEAD commit author. Otherwise, <GITHUB_ACTOR>, the GitHub user that initiated the event. |
+| `author-email` | The email address of the commit author. | For `push` events, the HEAD commit author. Otherwise, <GITHUB_ACTOR>@users.noreply.github.com, where `GITHUB_ACTOR` is the GitHub user that initiated the event. |
+| `committer-name` | The name of the committer. | Defaults to match `author-name` |
+| `committer-email` | The email address of the committer. | Defaults to match `author-email` |
+| `title` | The title of the pull request. | `Auto-generated by create-pull-request action` |
+| `body` | The body of the pull request. | `Auto-generated pull request by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub Action` |
+| `labels` | A comma separated list of labels. | |
+| `assignees` | A comma separated list of assignees (GitHub usernames). | |
+| `reviewers` | A comma separated list of reviewers (GitHub usernames) to request a review from. | |
+| `team-reviewers` | A comma separated list of GitHub teams to request a review from. | |
+| `milestone` | The number of the milestone to associate this pull request with. | |
+| `project` | The name of the project for which a card should be created. Requires `project-column`. | |
+| `project-column` | The name of the project column under which a card should be created. Requires `project`. | |
+| `branch` | The branch name. See **Branch naming** below for details. | `create-pull-request/patch` |
+| `base` | Sets the pull request base branch. | Defaults to the currently checked out branch, `GITHUB_REF`. For `pull_request` events, `GITHUB_HEAD_REF` |
+| `branch-suffix` | The branch suffix type. Valid values are `short-commit-hash`, `timestamp`, `random` and `none`. See **Branch naming** below for details. | `short-commit-hash` |
 
-e.g.
-```
-create-pull-request/patch-fcdfb59
-create-pull-request/patch-394710b
+**Outputs**
+
+The pull request number is output as both an environment variable and a step output.
+Note that in order to read the step output the action step must have an id.
+
+```yml
+      - name: Create Pull Request
+        id: cpr
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Check outputs
+        run: |
+          echo "Pull Request Number - ${{ env.PULL_REQUEST_NUMBER }}"
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pr_number }}"
 ```
 
-#### Ignoring files
+### Branch naming
+
+For branch naming there are two strategies. Always create a new branch each time there are changes to be committed, OR, create a fixed-name pull request branch that will be updated with any new commits until it is merged or closed.
+
+#### Strategy A - Always create a new pull request branch (default)
+
+For this strategy there are three options to suffix the branch name.
+The branch name is defined by the input `branch` and defaults to `create-pull-request/patch`. The following options are values for `branch-suffix`.
+
+- `short-commit-hash` (default) - Commits will be made to a branch suffixed with the short SHA1 commit hash. e.g. `create-pull-request/patch-fcdfb59`, `create-pull-request/patch-394710b`
+
+- `timestamp` - Commits will be made to a branch suffixed by a timestamp. e.g. `create-pull-request/patch-1569322532`, `create-pull-request/patch-1569322552`
+
+- `random` - Commits will be made to a branch suffixed with a random alpha-numeric string. This option should be used if multiple pull requests will be created during the execution of a workflow. e.g. `create-pull-request/patch-6qj97jr`, `create-pull-request/patch-5jrjhvd`
+
+#### Strategy B - Create and update a pull request branch
+
+To use this strategy, set `branch-suffix` to the value `none`. The input `branch` defaults to `create-pull-request/patch`. Commits will be made to this branch and a pull request created. Any subsequent changes will be committed to the *same* branch and reflected in the open pull request. If the pull request is merged or closed a new one will be created.
+
+### Ignoring files
 
 If there are files or directories you want to ignore you can simply add them to a `.gitignore` file at the root of your repository. The action will respect this file.
 
-## Example
+### Commit as github-actions[bot]
 
-Here is an example that sets all the environment variables.
+You can make commits that appear to be made by the GitHub Actions bot as follows.
 
 ```yml
-    - name: Create Pull Request
-      uses: peter-evans/create-pull-request@v1.1.2
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        REPO_ACCESS_TOKEN: ${{ secrets.REPO_ACCESS_TOKEN }}
-        PULL_REQUEST_BRANCH: my-patches
-        COMMIT_MESSAGE: Auto-modify files by my-file-modifier-action
-        PULL_REQUEST_TITLE: Changes from my-file-modifier-action
-        PULL_REQUEST_BODY: This is an auto-generated PR with changes from my-file-modifier-action
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          author-name: github-actions[bot]
+          author-email: 41898282+github-actions[bot]@users.noreply.github.com
+          committer-name: GitHub
+          committer-email: noreply@github.com
 ```
 
-This configuration will create pull requests that look like this:
+## Reference Example
 
-![Pull Request Example](pull-request-example.png?raw=true)
+The following workflow is a reference example that sets all the main inputs.
+
+See [examples](examples.md) for more realistic use cases.
+
+```yml
+name: Create Pull Request
+on: push
+jobs:
+  createPullRequest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Create report file
+        run: date +%s > report.txt
+      - name: Create Pull Request
+        id: cpr
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: Add report file
+          author-email: peter-evans@users.noreply.github.com
+          author-name: Peter Evans
+          title: '[Example] Add report file'
+          body: |
+            New report
+            - Contains *today's* date
+            - Auto-generated by [create-pull-request][1]
+
+            [1]: https://github.com/peter-evans/create-pull-request
+          labels: report, automated pr
+          assignees: peter-evans
+          reviewers: peter-evans
+          milestone: 1
+          project: Example Project
+          project-column: To do
+          branch: example-patches
+          branch-suffix: short-commit-hash
+      - name: Check outputs
+        run: |
+          echo "Pull Request Number - ${{ env.PULL_REQUEST_NUMBER }}"
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pr_number }}"
+```
+
+This reference configuration will create pull requests that look like this:
+
+![Pull Request Example](assets/pull-request-example.png)
 
 ## License
 
-MIT License - see the [LICENSE](LICENSE) file for details
+[MIT](LICENSE)

action.yml

@@ -0,0 +1,49 @@
+name: 'Create Pull Request'
+description: 'Creates a pull request for changes to your repository in the actions workspace'
+inputs:
+  token:
+    description: 'The GitHub authentication token'
+    required: true
+  commit-message:
+    description: 'The message to use when committing changes.'
+  author-name:
+    description: 'The name of the commit author.'
+  author-email:
+    description: 'The email address of the commit author.'
+  committer-name:
+    description: 'The name of the committer.'
+  committer-email:
+    description: 'The email address of the committer.'
+  title:
+    description: 'The title of the pull request.'
+  body:
+    description: 'The body of the pull request.'
+  labels:
+    description: 'A comma separated list of labels.'
+  assignees:
+    description: 'A comma separated list of assignees (GitHub usernames).'
+  reviewers:
+    description: 'A comma separated list of reviewers (GitHub usernames) to request a review from.'
+  team-reviewers:
+    description: 'A comma separated list of GitHub teams to request a review from.'
+  milestone:
+    description: 'The number of the milestone to associate this pull request with.'
+  project:
+    description: 'The name of the project for which a card should be created.'
+  project-column:
+    description: 'The name of the project column under which a card should be created.'
+  branch:
+    description: 'The pull request branch name.'
+  base:
+    description: 'Sets the pull request base branch.'
+  branch-suffix:
+    description: 'The branch suffix type.'
+outputs:
+  pr_number:
+    description: 'The pull request number'
+runs:
+  using: 'node12'
+  main: 'dist/index.js'
+branding:
+  icon: 'git-pull-request'  
+  color: 'gray-dark'

assets/logo.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="43%" height="43%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="color: #000000;"><title>git-pull-request</title>
+  <circle cx="18" cy="18" r="3"></circle>
+  <circle cx="6" cy="6" r="3"></circle>
+  <path d="M13 6h3a2 2 0 0 1 2 2v7"></path>
+  <line x1="6" y1="9" x2="6" y2="21"></line>
+</svg>

create-pull-request.py

@@ -1,154 +0,0 @@
-#!/usr/bin/env python3
-''' Create Pull Request '''
-import json
-import os
-from git import Repo
-from github import Github
-
-
-def get_github_event(github_event_path):
-    with open(github_event_path) as f:
-        github_event = json.load(f)
-    if os.environ.get('DEBUG_EVENT') is not None:
-        print(json.dumps(github_event, sort_keys=True, indent=2))
-    return github_event
-
-
-def ignore_event(github_event):
-    if 'schedule' in github_event:
-        print("Allow schedule event.")
-        return False
-    # Ignore push events on deleted branches
-    # The event we want to ignore occurs when a PR is created but the repository owner decides
-    # not to commit the changes. They close the PR and delete the branch. This creates a 
-    # "push" event that we want to ignore, otherwise it will create another branch and PR on
-    # the same commit.
-    deleted = "{deleted}".format(**github_event)
-    if deleted == "True":
-        print("Ignoring delete branch event.")
-        return True
-    ref = "{ref}".format(**github_event)
-    if not ref.startswith('refs/heads/'):
-        print("Ignoring events for tags and remotes.")
-        return True
-    return False
-
-
-def pr_branch_exists(repo, branch):
-    for ref in repo.remotes.origin.refs:
-        if ref.name == ("origin/%s" % branch):
-            return True
-    return False
-
-
-def get_head_author(github_event):
-    if 'schedule' in github_event:
-        email = os.environ['GITHUB_ACTOR'] + '@users.noreply.github.com'
-        name = os.environ['GITHUB_ACTOR']
-    else:
-        email = "{head_commit[author][email]}".format(**github_event)
-        name = "{head_commit[author][name]}".format(**github_event)
-    return email, name
-
-
-def get_head_short_sha1(repo):
-    return repo.git.rev_parse('--short', 'HEAD')
-
-
-def set_git_config(git, email, name):
-    git.config('--global', 'user.email', '"%s"' % email)
-    git.config('--global', 'user.name', '"%s"' % name)
-
-
-def set_git_remote_url(git, token, github_repository):
-    git.remote('set-url', 'origin', "https://%s:x-oauth-basic@github.com/%s" % (token, github_repository))
-
-
-def commit_changes(git, branch, commit_message):
-    git.checkout('HEAD', b=branch)
-    git.add('-A')
-    git.commit(m=commit_message)
-    return git.push('--set-upstream', 'origin', branch)
-
-
-def create_pull_request(token, repo, head, base, title, body):
-    return Github(token).get_repo(repo).create_pull(
-        title=title,
-        body=body,
-        base=base,
-        head=head)
-
-
-def process_event(github_event, repo, branch, base):
-    # Fetch required environment variables
-    github_token = os.environ['GITHUB_TOKEN']
-    github_repository = os.environ['GITHUB_REPOSITORY']
-    repo_access_token = os.environ['REPO_ACCESS_TOKEN']
-    # Fetch remaining optional environment variables
-    commit_message = os.getenv(
-        'COMMIT_MESSAGE',
-        "Auto-committed changes by create-pull-request action")
-    title = os.getenv(
-        'PULL_REQUEST_TITLE',
-        "Auto-generated by create-pull-request action")
-    body = os.getenv(
-        'PULL_REQUEST_BODY', "Auto-generated pull request by "
-        "[create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub Action")
-
-    # Get the HEAD committer's email and name
-    author_email, author_name = get_head_author(github_event)
-    # Set git configuration
-    set_git_config(repo.git, author_email, author_name)
-    # Update URL for the 'origin' remote
-    set_git_remote_url(repo.git, repo_access_token, github_repository)
-
-    # Commit the repository changes
-    print("Committing changes.")
-    commit_result = commit_changes(repo.git, branch, commit_message)
-    print(commit_result)
-
-    # Create the pull request
-    print("Creating a request to pull %s into %s." % (branch, base))
-    pull_request = create_pull_request(
-        github_token,
-        github_repository,
-        branch,
-        base,
-        title,
-        body
-    )
-    print("Created pull request %d." % pull_request.number)
-
-
-# Get the JSON event data
-github_event = get_github_event(os.environ['GITHUB_EVENT_PATH'])
-# Check if this event should be ignored
-if not ignore_event(github_event):
-    # Set the repo to the working directory
-    repo = Repo(os.getcwd())
-
-    # Fetch/Set the branch name
-    branch = os.getenv('PULL_REQUEST_BRANCH', 'create-pull-request/patch')
-    # Set the current branch as the target base branch
-    base = os.environ['GITHUB_REF'][11:]
-
-    # Skip if the current branch is a PR branch created by this action
-    if not base.startswith(branch):
-        # Suffix with the short SHA1 hash
-        branch = "%s-%s" % (branch, get_head_short_sha1(repo))
-
-        # Check if a PR branch already exists for this HEAD commit
-        if not pr_branch_exists(repo, branch):
-            # Check if there are changes to pull request
-            if repo.is_dirty() or len(repo.untracked_files) > 0:
-                print("Repository has modified or untracked files.")
-                process_event(github_event, repo, branch, base)
-            else:
-                print("Repository has no modified or untracked files. Skipping.")
-        else:
-            print(
-                "Pull request branch '%s' already exists for this commit. Skipping." %
-                branch)
-    else:
-        print(
-            "Branch '%s' was created by this action. Skipping." % base)

dist/src/create-pull-request.py

@@ -0,0 +1,352 @@
+#!/usr/bin/env python3
+""" Create Pull Request """
+import json
+import os
+import random
+import string
+import sys
+import time
+from git import Repo
+from github import Github, GithubException
+
+
+def get_github_event(github_event_path):
+    with open(github_event_path) as f:
+        github_event = json.load(f)
+    if bool(os.environ.get("DEBUG_EVENT")):
+        print(os.environ["GITHUB_EVENT_NAME"])
+        print(json.dumps(github_event, sort_keys=True, indent=2))
+    return github_event
+
+
+def get_head_short_sha1(repo):
+    return repo.git.rev_parse("--short", "HEAD")
+
+
+def get_random_suffix(size=7, chars=string.ascii_lowercase + string.digits):
+    return "".join(random.choice(chars) for _ in range(size))
+
+
+def remote_branch_exists(repo, branch):
+    for ref in repo.remotes.origin.refs:
+        if ref.name == ("origin/%s" % branch):
+            return True
+    return False
+
+
+def get_author_default(event_name, event_data):
+    if event_name == "push":
+        email = "{head_commit[author][email]}".format(**event_data)
+        name = "{head_commit[author][name]}".format(**event_data)
+    else:
+        email = os.environ["GITHUB_ACTOR"] + "@users.noreply.github.com"
+        name = os.environ["GITHUB_ACTOR"]
+    return email, name
+
+
+def get_repo_url(token, github_repository):
+    return "https://x-access-token:%s@github.com/%s" % (token, github_repository)
+
+
+def checkout_branch(git, remote_exists, branch):
+    if remote_exists:
+        print("Checking out branch '%s'" % branch)
+        git.stash("--include-untracked")
+        git.checkout(branch)
+        try:
+            git.stash("pop")
+        except BaseException:
+            git.checkout("--theirs", ".")
+            git.reset()
+    else:
+        print("Creating new branch '%s'" % branch)
+        git.checkout("HEAD", b=branch)
+
+
+def push_changes(git, token, github_repository, branch, commit_message):
+    git.add("-A")
+    git.commit(m=commit_message)
+    repo_url = get_repo_url(token, github_repository)
+    return git.push("-f", repo_url, f"HEAD:refs/heads/{branch}")
+
+
+def cs_string_to_list(str):
+    # Split the comma separated string into a list
+    l = [i.strip() for i in str.split(",")]
+    # Remove empty strings
+    return list(filter(None, l))
+
+
+def create_project_card(github_repo, project_name, project_column_name, pull_request):
+    # Locate the project by name
+    project = None
+    for project_item in github_repo.get_projects("all"):
+        if project_item.name == project_name:
+            project = project_item
+            break
+
+    if not project:
+        print("::warning::Project not found. Unable to create project card.")
+        return
+
+    # Locate the column by name
+    column = None
+    for column_item in project.get_columns():
+        if column_item.name == project_column_name:
+            column = column_item
+            break
+
+    if not column:
+        print("::warning::Project column not found. Unable to create project card.")
+        return
+
+    # Create a project card for the pull request
+    column.create_card(content_id=pull_request.id, content_type="PullRequest")
+    print(
+        "Added pull request #%d to project '%s' under column '%s'"
+        % (pull_request.number, project.name, column.name)
+    )
+
+
+def process_event(github_token, github_repository, repo, branch, base):
+    # Fetch optional environment variables with default values
+    commit_message = os.getenv(
+        "COMMIT_MESSAGE", "Auto-committed changes by create-pull-request action"
+    )
+    title = os.getenv(
+        "PULL_REQUEST_TITLE", "Auto-generated by create-pull-request action"
+    )
+    body = os.getenv(
+        "PULL_REQUEST_BODY",
+        "Auto-generated pull request by "
+        "[create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub Action",
+    )
+    # Fetch optional environment variables with no default values
+    pull_request_labels = os.environ.get("PULL_REQUEST_LABELS")
+    pull_request_assignees = os.environ.get("PULL_REQUEST_ASSIGNEES")
+    pull_request_milestone = os.environ.get("PULL_REQUEST_MILESTONE")
+    pull_request_reviewers = os.environ.get("PULL_REQUEST_REVIEWERS")
+    pull_request_team_reviewers = os.environ.get("PULL_REQUEST_TEAM_REVIEWERS")
+    project_name = os.environ.get("PROJECT_NAME")
+    project_column_name = os.environ.get("PROJECT_COLUMN_NAME")
+
+    # Push the local changes to the remote branch
+    print("Pushing changes to 'origin/%s'" % branch)
+    push_result = push_changes(
+        repo.git, github_token, github_repository, branch, commit_message
+    )
+    print(push_result)
+
+    # Create the pull request
+    github_repo = Github(github_token).get_repo(github_repository)
+    try:
+        pull_request = github_repo.create_pull(
+            title=title, body=body, base=base, head=branch
+        )
+        print(
+            "Created pull request #%d (%s => %s)" % (pull_request.number, branch, base)
+        )
+    except GithubException as e:
+        if e.status == 422:
+            # Format the branch name
+            head_branch = "%s:%s" % (github_repository.split("/")[0], branch)
+            # Get the pull request
+            pull_request = github_repo.get_pulls(
+                state="open", base=base, head=head_branch
+            )[0]
+            print(
+                "Updated pull request #%d (%s => %s)"
+                % (pull_request.number, branch, base)
+            )
+        else:
+            print(str(e))
+            sys.exit(1)
+
+    # Set the output variables
+    os.system("echo ::set-env name=PULL_REQUEST_NUMBER::%d" % pull_request.number)
+    os.system("echo ::set-output name=pr_number::%d" % pull_request.number)
+
+    # Set labels, assignees and milestone
+    if pull_request_labels is not None:
+        print("Applying labels '%s'" % pull_request_labels)
+        pull_request.as_issue().edit(labels=cs_string_to_list(pull_request_labels))
+    if pull_request_assignees is not None:
+        print("Applying assignees '%s'" % pull_request_assignees)
+        pull_request.as_issue().edit(
+            assignees=cs_string_to_list(pull_request_assignees)
+        )
+    if pull_request_milestone is not None:
+        print("Applying milestone '%s'" % pull_request_milestone)
+        milestone = github_repo.get_milestone(int(pull_request_milestone))
+        pull_request.as_issue().edit(milestone=milestone)
+
+    # Set pull request reviewers
+    if pull_request_reviewers is not None:
+        print("Requesting reviewers '%s'" % pull_request_reviewers)
+        try:
+            pull_request.create_review_request(
+                reviewers=cs_string_to_list(pull_request_reviewers)
+            )
+        except GithubException as e:
+            # Likely caused by "Review cannot be requested from pull request
+            # author."
+            if e.status == 422:
+                print("Requesting reviewers failed - %s" % e.data["message"])
+
+    # Set pull request team reviewers
+    if pull_request_team_reviewers is not None:
+        print("Requesting team reviewers '%s'" % pull_request_team_reviewers)
+        pull_request.create_review_request(
+            team_reviewers=cs_string_to_list(pull_request_team_reviewers)
+        )
+
+    # Create a project card for the pull request
+    if project_name is not None and project_column_name is not None:
+        try:
+            create_project_card(
+                github_repo, project_name, project_column_name, pull_request
+            )
+        except GithubException as e:
+            # Likely caused by "Project already has the associated issue."
+            if e.status == 422:
+                print(
+                    "Create project card failed - %s" % e.data["errors"][0]["message"]
+                )
+
+
+# Fetch environment variables
+github_token = os.environ["GITHUB_TOKEN"]
+github_repository = os.environ["GITHUB_REPOSITORY"]
+github_ref = os.environ["GITHUB_REF"]
+event_name = os.environ["GITHUB_EVENT_NAME"]
+# Get the JSON event data
+event_data = get_github_event(os.environ["GITHUB_EVENT_PATH"])
+
+# Get the default for author email and name
+author_email, author_name = get_author_default(event_name, event_data)
+# Set author name and email overrides
+author_name = os.getenv("COMMIT_AUTHOR_NAME", author_name)
+author_email = os.getenv("COMMIT_AUTHOR_EMAIL", author_email)
+# Set committer name and email overrides
+committer_name = os.getenv("COMMITTER_NAME", author_name)
+committer_email = os.getenv("COMMITTER_EMAIL", author_email)
+
+# Set the repo to the working directory
+repo = Repo(os.getcwd())
+# Set git environment. This will not persist after the action completes.
+print("Configuring git author as '%s <%s>'" % (author_name, author_email))
+print("Configuring git committer as '%s <%s>'" % (committer_name, committer_email))
+repo.git.update_environment(
+    GIT_AUTHOR_NAME=author_name,
+    GIT_AUTHOR_EMAIL=author_email,
+    GIT_COMMITTER_NAME=committer_name,
+    GIT_COMMITTER_EMAIL=committer_email,
+)
+
+# Fetch/Set the branch name
+branch_prefix = os.getenv("PULL_REQUEST_BRANCH", "create-pull-request/patch")
+# Fetch an optional base branch override
+base_override = os.environ.get("PULL_REQUEST_BASE")
+
+# Set the base branch
+if base_override is not None:
+    base = base_override
+    print("Overriding the base with branch '%s'" % base)
+    checkout_branch(repo.git, True, base)
+elif github_ref.startswith("refs/pull/"):
+    # Check the PR is not raised from a fork of the repository
+    head_repo = "{pull_request[head][repo][full_name]}".format(**event_data)
+    if head_repo != github_repository:
+        print(
+            "::warning::Pull request was raised from a fork of the repository. "
+            + "Limitations on forked repositories have been imposed by GitHub Actions. "
+            + "Unable to continue. Exiting."
+        )
+        sys.exit()
+    # Switch to the merging branch instead of the merge commit
+    base = os.environ["GITHUB_HEAD_REF"]
+    print(
+        "Removing the merge commit by switching to the pull request head branch '%s'"
+        % base
+    )
+    checkout_branch(repo.git, True, base)
+elif github_ref.startswith("refs/heads/"):
+    base = github_ref[11:]
+    print("Currently checked out base assumed to be branch '%s'" % base)
+else:
+    print(
+        f"::warning::Currently checked out ref '{github_ref}' is not a valid base for a pull request. "
+        + "Unable to continue. Exiting."
+    )
+    sys.exit()
+
+# Skip if the current branch is a PR branch created by this action.
+# This may occur when using a PAT instead of GITHUB_TOKEN because
+# a PAT allows workflow actions to trigger further events.
+if base.startswith(branch_prefix):
+    print("Branch '%s' was created by this action. Skipping." % base)
+    sys.exit()
+
+# Fetch an optional environment variable to determine the branch suffix
+branch_suffix = os.getenv("BRANCH_SUFFIX", "short-commit-hash")
+if branch_suffix == "short-commit-hash":
+    # Suffix with the short SHA1 hash
+    branch = "%s-%s" % (branch_prefix, get_head_short_sha1(repo))
+elif branch_suffix == "timestamp":
+    # Suffix with the current timestamp
+    branch = "%s-%s" % (branch_prefix, int(time.time()))
+elif branch_suffix == "random":
+    # Suffix with the current timestamp
+    branch = "%s-%s" % (branch_prefix, get_random_suffix())
+elif branch_suffix == "none":
+    # Fixed branch name
+    branch = branch_prefix
+else:
+    print("Branch suffix '%s' is not a valid value." % branch_suffix)
+    sys.exit(1)
+
+# Output head branch
+print("Pull request branch to create/update set to '%s'" % branch)
+
+# Check if the determined head branch exists as a remote
+remote_exists = remote_branch_exists(repo, branch)
+if remote_exists:
+    print(
+        "Pull request branch '%s' already exists as remote branch 'origin/%s'"
+        % (branch, branch)
+    )
+    if branch_suffix == "short-commit-hash":
+        # A remote branch already exists for the HEAD commit
+        print(
+            "Pull request branch '%s' already exists for this commit. Skipping."
+            % branch
+        )
+        sys.exit()
+    elif branch_suffix in ["timestamp", "random"]:
+        # Generated branch name collision with an existing branch
+        print(
+            "Pull request branch '%s' collided with a branch of the same name. Please re-run."
+            % branch
+        )
+        sys.exit(1)
+
+# Checkout branch
+checkout_branch(repo.git, remote_exists, branch)
+
+# Check if there are changes to pull request
+if remote_exists:
+    print(
+        "Checking for local working copy changes indicating a "
+        + "diff with existing pull request branch 'origin/%s'" % branch
+    )
+else:
+    print(
+        "Checking for local working copy changes indicating a "
+        + "diff with base 'origin/%s'" % base
+    )
+
+if repo.is_dirty() or len(repo.untracked_files) > 0:
+    print("Modified or untracked files detected.")
+    process_event(github_token, github_repository, repo, branch, base)
+else:
+    print("No modified or untracked files detected. Skipping.")

dist/src/requirements.txt

@@ -0,0 +1,2 @@
+GitPython==3.0.8
+PyGithub==1.46

dist/src/setup-python.js

@@ -0,0 +1,52 @@
+const core = require("@actions/core");
+const tc = require("@actions/tool-cache");
+const path = require("path");
+const semver = require("semver");
+
+/**
+ * Setup for Python from the GitHub Actions tool cache
+ * Converted from https://github.com/actions/setup-python
+ *
+ * @param {string} versionSpec version of Python
+ * @param {string} arch architecture (x64|x32)
+ */
+let setupPython = function(versionSpec, arch) {
+  return new Promise((resolve, reject) => {
+    const IS_WINDOWS = process.platform === "win32";
+
+    // Find the version of Python we want in the tool cache
+    const installDir = tc.find("Python", versionSpec, arch);
+    core.debug(`installDir: ${installDir}`);
+
+    // Set paths
+    core.exportVariable("pythonLocation", installDir);
+    core.addPath(installDir);
+    if (IS_WINDOWS) {
+      core.addPath(path.join(installDir, "Scripts"));
+    } else {
+      core.addPath(path.join(installDir, "bin"));
+    }
+
+    if (IS_WINDOWS) {
+      // Add --user directory
+      // `installDir` from tool cache should look like $AGENT_TOOLSDIRECTORY/Python/<semantic version>/x64/
+      // So if `findLocalTool` succeeded above, we must have a conformant `installDir`
+      const version = path.basename(path.dirname(installDir));
+      const major = semver.major(version);
+      const minor = semver.minor(version);
+
+      const userScriptsDir = path.join(
+        process.env["APPDATA"] || "",
+        "Python",
+        `Python${major}${minor}`,
+        "Scripts"
+      );
+      core.addPath(userScriptsDir);
+    }
+    // On Linux and macOS, pip will create the --user directory and add it to PATH as needed.
+
+    resolve();
+  });
+};
+
+module.exports = setupPython;

examples.md

@@ -0,0 +1,390 @@
+# Examples
+
+- [Use case: Create a pull request to update X periodically](#use-case-create-a-pull-request-to-update-x-periodically)
+  - [Update NPM dependencies](#update-npm-dependencies)
+  - [Keep Go up to date](#keep-go-up-to-date)
+  - [Update SwaggerUI for GitHub Pages](#update-swaggerui-for-github-pages)
+  - [Spider and download a website](#spider-and-download-a-website)
+- [Use case: Create a pull request to update X by calling the GitHub API](#use-case-create-a-pull-request-to-update-x-by-calling-the-github-api)
+  - [Call the GitHub API from an external service](#call-the-github-api-from-an-external-service)
+  - [Call the GitHub API from another GitHub Actions workflow](#call-the-github-api-from-another-github-actions-workflow)
+- [Use case: Create a pull request to modify/fix pull requests](#use-case-create-a-pull-request-to-modifyfix-pull-requests)
+  - [autopep8](#autopep8)
+- [Misc workflow tips](#misc-workflow-tips)
+  - [Filtering push events](#filtering-push-events)
+  - [Dynamic configuration using variables](#dynamic-configuration-using-variables)
+  - [Debugging GitHub Actions](#debugging-github-actions)
+
+
+## Use case: Create a pull request to update X periodically
+
+This pattern will work well for updating any kind of static content from an external source. The workflow executes on a schedule and raises a pull request when there are changes.
+
+### Update NPM dependencies
+
+```yml
+name: Update Dependencies
+on:
+  schedule:
+    - cron:  '0 10 * * 1'
+jobs:
+  update-deps:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '10.x'
+      - name: Update dependencies
+        id: vars
+        run: |
+          npm install -g npm-check-updates
+          ncu -u
+          npm install
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: update dependencies
+          title: Automated Dependency Updates
+          body: This is an auto-generated PR with dependency updates.
+          branch: dep-updates
+          branch-suffix: none
+```
+
+### Keep Go up to date
+
+Keep Go up to date with [ensure-latest-go](https://github.com/jmhodges/ensure-latest-go) action.
+
+```yml
+name: Keeping Go up to date
+on:
+  schedule:
+    - cron: 47 4 * * *
+  push:
+    branches:
+      - master
+jobs:
+  fresh_go:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          ref: master
+      - uses: jmhodges/ensure-latest-go@v1.0.2
+        id: ensure_go
+      - run: echo "##[set-output name=pr_title;]update to latest Go release ${{ steps.ensure_go.outputs.go_version}}"
+        id: pr_title_maker
+      - name: Create pull request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          title: ${{ steps.pr_title_maker.outputs.pr_title }}
+          body: Auto-generated pull request created by the GitHub Actions [create-pull-request](https://github.com/peter-evans/create-pull-request) and [ensure-latest-go](https://github.com/jmhodges/ensure-latest-go).
+          commit-message: ${{ steps.pr_title_maker.outputs.pr_title }}
+          branch-suffix: none
+          branch: ensure-latest-go/patch-${{ steps.ensure_go.outputs.go_version }}
+```
+
+### Update SwaggerUI for GitHub Pages
+
+When using [GitHub Pages to host Swagger documentation](https://github.com/peter-evans/swagger-github-pages), this workflow updates the repository with the latest distribution of [SwaggerUI](https://github.com/swagger-api/swagger-ui).
+
+You must create a file called `swagger-ui.version` at the root of your repository before running.
+```yml
+name: Update Swagger UI
+on:
+  schedule:
+    - cron:  '0 10 * * *'
+jobs:
+  updateSwagger:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Get Latest Swagger UI Release
+        id: swagger-ui
+        run: |
+          echo ::set-output name=release_tag::$(curl -sL https://api.github.com/repos/swagger-api/swagger-ui/releases/latest | jq -r ".tag_name")
+          echo ::set-output name=current_tag::$(<swagger-ui.version)
+      - name: Update Swagger UI
+        if: steps.swagger-ui.outputs.current_tag != steps.swagger-ui.outputs.release_tag
+        env:
+          RELEASE_TAG: ${{ steps.swagger-ui.outputs.release_tag }}
+          SWAGGER_YAML: "swagger.yaml"
+        run: |
+          # Delete the dist directory and index.html
+          rm -fr dist index.html
+          # Download the release
+          curl -sL -o $RELEASE_TAG https://api.github.com/repos/swagger-api/swagger-ui/tarball/$RELEASE_TAG
+          # Extract the dist directory
+          tar -xzf $RELEASE_TAG --strip-components=1 $(tar -tzf $RELEASE_TAG | head -1 | cut -f1 -d"/")/dist
+          rm $RELEASE_TAG
+          # Move index.html to the root
+          mv dist/index.html .
+          # Fix references in index.html
+          sed -i "s|https://petstore.swagger.io/v2/swagger.json|$SWAGGER_YAML|g" index.html
+          sed -i "s|href=\"./|href=\"dist/|g" index.html
+          sed -i "s|src=\"./|src=\"dist/|g" index.html
+          # Update current release
+          echo ${{ steps.swagger-ui.outputs.release_tag }} > swagger-ui.version
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: Update swagger-ui to ${{ steps.swagger-ui.outputs.release_tag }}
+          title: Update SwaggerUI to ${{ steps.swagger-ui.outputs.release_tag }}
+          body: |
+            Updates [swagger-ui][1] to ${{ steps.swagger-ui.outputs.release_tag }}
+
+            Auto-generated by [create-pull-request][2]
+
+            [1]: https://github.com/swagger-api/swagger-ui
+            [2]: https://github.com/peter-evans/create-pull-request
+          labels: dependencies, automated pr
+          branch: swagger-ui-updates
+          branch-suffix: none
+```
+
+### Spider and download a website
+
+This workflow spiders a website and downloads the content. Any changes to the website will be raised in a pull request.
+
+```yml
+name: Download Website
+on:
+  schedule:
+    - cron:  '0 10 * * *'
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Download website
+        run: |
+          wget \
+            --recursive \
+            --level=2 \
+            --wait=1 \
+            --no-clobber \
+            --page-requisites \
+            --html-extension \
+            --convert-links \
+            --domains quotes.toscrape.com \
+            http://quotes.toscrape.com/
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: update local website copy
+          title: Automated Updates to Local Website Copy
+          body: This is an auto-generated PR with website updates.
+          branch: website-updates
+          branch-suffix: none
+```
+
+## Use case: Create a pull request to update X by calling the GitHub API
+
+You can use the GitHub API to trigger a webhook event called [`repository_dispatch`](https://help.github.com/en/github/automating-your-workflow-with-github-actions/events-that-trigger-workflows#external-events-repository_dispatch) when you want to trigger a workflow for activity that happens outside of GitHub.
+This pattern will work well for updating any kind of static content from an external source.
+
+You can modify any of the examples in the previous section to work in this fashion.
+
+Set the workflow to execute `on: repository_dispatch`.
+
+```yml
+on:
+  repository_dispatch:
+    types: [create-pull-request]
+```
+
+### Call the GitHub API from an external service
+
+An `on: repository_dispatch` workflow can be triggered by a call to the GitHub API as follows.
+
+- `[username]` is a GitHub username
+- `[token]` is a `repo` scoped [Personal Access Token](https://help.github.com/en/articles/creating-a-personal-access-token-for-the-command-line)
+- `[repository]` is the name of the repository the workflow resides in.
+
+```
+curl -XPOST -u "[username]:[token]" \
+  -H "Accept: application/vnd.github.everest-preview+json" \
+  -H "Content-Type: application/json" \
+  https://api.github.com/repos/[username]/[repository]/dispatches \
+  --data '{"event_type": "create-pull-request"}'
+```
+
+### Call the GitHub API from another GitHub Actions workflow
+
+An `on: repository_dispatch` workflow can be triggered from another workflow with [repository-dispatch](https://github.com/peter-evans/repository-dispatch) action.
+
+```yml
+- name: Repository Dispatch
+  uses: peter-evans/repository-dispatch@v1.0.0
+  with:
+    token: ${{ secrets.REPO_ACCESS_TOKEN }}
+    repository: username/my-repo
+    event-type: create-pull-request
+    client-payload: '{"ref": "${{ github.ref }}", "sha": "${{ github.sha }}"}'
+```
+
+## Use case: Create a pull request to modify/fix pull requests
+
+This is a pattern that works well for any automated code linting and fixing. A pull request can be created to fix or modify something during an `on: pull_request` workflow. The pull request containing the fix will be raised with the original pull request as the base. This can be then be merged to update the original pull request and pass any required tests.
+
+Note that due to [limitations on forked repositories](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/authenticating-with-the-github_token#permissions-for-the-github_token) workflows for this use case do not work for pull requests raised from forks.
+
+### autopep8
+
+The following is an example workflow for a use case where [autopep8 action](https://github.com/peter-evans/autopep8) runs as both a check on pull requests and raises a further pull request to apply code fixes.
+
+How it works:
+
+1. When a pull request is raised the workflow executes as a check
+2. If autopep8 makes any fixes a pull request will be raised for those fixes to be merged into the current pull request branch. The workflow then deliberately causes the check to fail.
+3. When the pull request containing the fixes is merged the workflow runs again. This time autopep8 makes no changes and the check passes.
+4. The original pull request can now be merged.
+
+```yml
+name: autopep8
+on: pull_request
+jobs:
+  autopep8:
+    # Check if the PR is not raised by this workflow and is not from a fork
+    if: startsWith(github.head_ref, 'autopep8-patches') == false && github.event.pull_request.head.repo.full_name == github.repository
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: autopep8
+        id: autopep8
+        uses: peter-evans/autopep8@v1.1.0
+        with:
+          args: --exit-code --recursive --in-place --aggressive --aggressive .
+      - name: Set autopep8 branch name
+        id: vars
+        run: echo ::set-output name=branch-name::"autopep8-patches/$GITHUB_HEAD_REF"
+      - name: Create Pull Request
+        if: steps.autopep8.outputs.exit-code == 2
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: autopep8 action fixes
+          title: Fixes by autopep8 action
+          body: This is an auto-generated PR with fixes by autopep8.
+          labels: autopep8, automated pr
+          branch: ${{ steps.vars.outputs.branch-name }}
+          branch-suffix: none
+      - name: Fail if autopep8 made changes
+        if: steps.autopep8.outputs.exit-code == 2
+        run: exit 1
+```
+
+## Misc workflow tips
+
+### Filtering push events
+
+For workflows using `on: push` you may want to ignore push events for tags and only execute for branches. Specifying `branches` causes only events on branches to trigger the workflow. The `'**'` wildcard will match any branch name.
+
+```yml
+on:
+  push:
+    branches:
+      - '**' 
+```
+
+If you have a workflow that contains jobs to handle push events on branches as well as tags, you can make sure that the job where you use `create-pull-request` action only executes when `github.ref` is a branch by using an `if` condition as follows.
+
+```yml
+on: push
+jobs:
+  createPullRequest:
+    if: startsWith(github.ref, 'refs/heads/')
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      ...
+
+  someOtherJob:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      ...
+```
+
+### Dynamic configuration using variables
+
+The following examples show how configuration for the action can be dynamically defined in a previous workflow step.
+
+The recommended method is to use [`set-output`](https://help.github.com/en/github/automating-your-workflow-with-github-actions/development-tools-for-github-actions#set-an-output-parameter-set-output). Note that the step where output variables are defined must have an id.
+
+```yml
+      - name: Set output variables
+        id: vars
+        run: |
+          echo ::set-output name=pr_title::"[Test] Add report file $(date +%d-%m-%Y)"
+          echo ::set-output name=pr_body::"This PR was auto-generated on $(date +%d-%m-%Y) \
+            by [create-pull-request](https://github.com/peter-evans/create-pull-request)."
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          title: ${{ steps.vars.outputs.pr_title }}
+          body: ${{ steps.vars.outputs.pr_body }}
+```
+
+Alternatively, [`set-env`](https://help.github.com/en/github/automating-your-workflow-with-github-actions/development-tools-for-github-actions#set-an-environment-variable-set-env) can be used to create environment variables.
+
+```yml
+      - name: Set environment variables
+        run: |
+          echo ::set-env name=PULL_REQUEST_TITLE::"[Test] Add report file $(date +%d-%m-%Y)"
+          echo ::set-env name=PULL_REQUEST_BODY::"This PR was auto-generated on $(date +%d-%m-%Y) \
+            by [create-pull-request](https://github.com/peter-evans/create-pull-request)."
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          title: ${{ env.PULL_REQUEST_TITLE }}
+          body: ${{ env.PULL_REQUEST_BODY }}
+```
+
+### Debugging GitHub Actions
+
+#### Runner Diagnostic Logging
+
+[Runner diagnostic logging](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/managing-a-workflow-run#enabling-runner-diagnostic-logging) provides additional log files that contain information about how a runner is executing an action.
+To enable runner diagnostic logging, set the secret `ACTIONS_RUNNER_DEBUG` to `true` in the repository that contains the workflow.
+
+#### Step Debug Logging
+
+[Step debug logging](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/managing-a-workflow-run#enabling-step-debug-logging) increases the verbosity of a job's logs during and after a job's execution.
+To enable step debug logging set the secret `ACTIONS_STEP_DEBUG` to `true` in the repository that contains the workflow.
+
+#### Output Various Contexts
+
+```yml
+    steps:
+      - name: Dump GitHub context
+        env:
+          GITHUB_CONTEXT: ${{ toJson(github) }}
+        run: echo "$GITHUB_CONTEXT"
+      - name: Dump job context
+        env:
+          JOB_CONTEXT: ${{ toJson(job) }}
+        run: echo "$JOB_CONTEXT"
+      - name: Dump steps context
+        env:
+          STEPS_CONTEXT: ${{ toJson(steps) }}
+        run: echo "$STEPS_CONTEXT"
+      - name: Dump runner context
+        env:
+          RUNNER_CONTEXT: ${{ toJson(runner) }}
+        run: echo "$RUNNER_CONTEXT"
+      - name: Dump strategy context
+        env:
+          STRATEGY_CONTEXT: ${{ toJson(strategy) }}
+        run: echo "$STRATEGY_CONTEXT"
+      - name: Dump matrix context
+        env:
+          MATRIX_CONTEXT: ${{ toJson(matrix) }}
+        run: echo "$MATRIX_CONTEXT"
+```

index.js

@@ -0,0 +1,74 @@
+const { inspect } = require("util");
+const core = require("@actions/core");
+const exec = require("@actions/exec");
+const setupPython = require("./src/setup-python");
+
+async function run() {
+  try {
+    // Allows ncc to find assets to be included in the distribution
+    const src = __dirname + "/src";
+    core.debug(`src: ${src}`);
+
+    // Setup Python from the tool cache
+    setupPython("3.8.x", "x64");
+
+    // Install requirements
+    await exec.exec("pip", [
+      "install",
+      "--requirement",
+      `${src}/requirements.txt`
+    ]);
+
+    // Fetch action inputs
+    const inputs = {
+      token: core.getInput("token"),
+      commitMessage: core.getInput("commit-message"),
+      commitAuthorName: core.getInput("author-name"),
+      commitAuthorEmail: core.getInput("author-email"),
+      committerName: core.getInput("committer-name"),
+      committerEmail: core.getInput("committer-email"),
+      title: core.getInput("title"),
+      body: core.getInput("body"),
+      labels: core.getInput("labels"),
+      assignees: core.getInput("assignees"),
+      reviewers: core.getInput("reviewers"),
+      teamReviewers: core.getInput("team-reviewers"),
+      milestone: core.getInput("milestone"),
+      project: core.getInput("project"),
+      projectColumn: core.getInput("project-column"),
+      branch: core.getInput("branch"),
+      base: core.getInput("base"),
+      branchSuffix: core.getInput("branch-suffix"),
+      debugEvent: core.getInput("debug-event")
+    };
+    core.debug(`Inputs: ${inspect(inputs)}`);
+
+    // Set environment variables from inputs.
+    if (inputs.token) process.env.GITHUB_TOKEN = inputs.token;
+    if (inputs.commitMessage) process.env.COMMIT_MESSAGE = inputs.commitMessage;
+    if (inputs.commitAuthorName) process.env.COMMIT_AUTHOR_NAME = inputs.commitAuthorName;
+    if (inputs.commitAuthorEmail) process.env.COMMIT_AUTHOR_EMAIL = inputs.commitAuthorEmail;
+    if (inputs.committerName) process.env.COMMITTER_NAME = inputs.committerName;
+    if (inputs.committerEmail) process.env.COMMITTER_EMAIL = inputs.committerEmail;
+    if (inputs.title) process.env.PULL_REQUEST_TITLE = inputs.title;
+    if (inputs.body) process.env.PULL_REQUEST_BODY = inputs.body;
+    if (inputs.labels) process.env.PULL_REQUEST_LABELS = inputs.labels;
+    if (inputs.assignees) process.env.PULL_REQUEST_ASSIGNEES = inputs.assignees;
+    if (inputs.reviewers) process.env.PULL_REQUEST_REVIEWERS = inputs.reviewers;
+    if (inputs.teamReviewers) process.env.PULL_REQUEST_TEAM_REVIEWERS = inputs.teamReviewers;
+    if (inputs.milestone) process.env.PULL_REQUEST_MILESTONE = inputs.milestone;
+    if (inputs.project) process.env.PROJECT_NAME = inputs.project;
+    if (inputs.projectColumn) process.env.PROJECT_COLUMN_NAME = inputs.projectColumn;
+    if (inputs.branch) process.env.PULL_REQUEST_BRANCH = inputs.branch;
+    if (inputs.base) process.env.PULL_REQUEST_BASE = inputs.base;
+    if (inputs.branchSuffix) process.env.BRANCH_SUFFIX = inputs.branchSuffix;
+    if (inputs.debugEvent) process.env.DEBUG_EVENT = inputs.debugEvent;
+
+    // Execute python script
+    await exec.exec("python", [`${src}/create-pull-request.py`]);
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+run();

package-lock.json

@@ -0,0 +1,71 @@
+{
+  "name": "create-pull-request",
+  "version": "1.8.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@actions/core": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.0.tgz",
+      "integrity": "sha512-ZKdyhlSlyz38S6YFfPnyNgCDZuAF2T0Qv5eHflNWytPS8Qjvz39bZFMry9Bb/dpSnqWcNeav5yM2CTYpJeY+Dw=="
+    },
+    "@actions/exec": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@actions/exec/-/exec-1.0.1.tgz",
+      "integrity": "sha512-nvFkxwiicvpzNiCBF4wFBDfnBvi7xp/as7LE1hBxBxKG2L29+gkIPBiLKMVORL+Hg3JNf07AKRfl0V5djoypjQ=="
+    },
+    "@actions/io": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@actions/io/-/io-1.0.1.tgz",
+      "integrity": "sha512-rhq+tfZukbtaus7xyUtwKfuiCRXd1hWSfmJNEpFgBQJ4woqPEpsBw04awicjwz9tyG2/MVhAEMfVn664Cri5zA=="
+    },
+    "@actions/tool-cache": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@actions/tool-cache/-/tool-cache-1.1.2.tgz",
+      "integrity": "sha512-IJczPaZr02ECa3Lgws/TJEVco9tjOujiQSZbO3dHuXXjhd5vrUtfOgGwhmz3/f97L910OraPZ8SknofUk6RvOQ==",
+      "requires": {
+        "@actions/core": "^1.1.0",
+        "@actions/exec": "^1.0.1",
+        "@actions/io": "^1.0.1",
+        "semver": "^6.1.0",
+        "typed-rest-client": "^1.4.0",
+        "uuid": "^3.3.2"
+      }
+    },
+    "@zeit/ncc": {
+      "version": "0.20.5",
+      "resolved": "https://registry.npmjs.org/@zeit/ncc/-/ncc-0.20.5.tgz",
+      "integrity": "sha512-XU6uzwvv95DqxciQx+aOLhbyBx/13ky+RK1y88Age9Du3BlA4mMPCy13BGjayOrrumOzlq1XV3SD/BWiZENXlw==",
+      "dev": true
+    },
+    "semver": {
+      "version": "6.3.0",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+      "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw=="
+    },
+    "tunnel": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.4.tgz",
+      "integrity": "sha1-LTeFoVjBdMmhbcLARuxfxfF0IhM="
+    },
+    "typed-rest-client": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/typed-rest-client/-/typed-rest-client-1.5.0.tgz",
+      "integrity": "sha512-DVZRlmsfnTjp6ZJaatcdyvvwYwbWvR4YDNFDqb+qdTxpvaVP99YCpBkA8rxsLtAPjBVoDe4fNsnMIdZTiPuKWg==",
+      "requires": {
+        "tunnel": "0.0.4",
+        "underscore": "1.8.3"
+      }
+    },
+    "underscore": {
+      "version": "1.8.3",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz",
+      "integrity": "sha1-Tz+1OxBuYJf8+ctBCfKl6b36UCI="
+    },
+    "uuid": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.3.tgz",
+      "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ=="
+    }
+  }
+}

package.json

@@ -0,0 +1,28 @@
+{
+  "name": "create-pull-request",
+  "version": "1.9.1",
+  "description": "Creates a pull request for changes to your repository in the actions workspace",
+  "main": "index.js",
+  "scripts": {
+    "package": "ncc build index.js -o dist"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/peter-evans/create-pull-request.git"
+  },
+  "keywords": [],
+  "author": "Peter Evans",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/peter-evans/create-pull-request/issues"
+  },
+  "homepage": "https://github.com/peter-evans/create-pull-request",
+  "dependencies": {
+    "@actions/core": "^1.1.1",
+    "@actions/exec": "^1.0.1",
+    "@actions/tool-cache": "^1.1.2"
+  },
+  "devDependencies": {
+    "@zeit/ncc": "0.20.5"
+  }
+}

requirements.txt

@@ -1,2 +0,0 @@
-GitPython==3.0.2
-PyGithub==1.43.8

src/create-pull-request.py

@@ -0,0 +1,352 @@
+#!/usr/bin/env python3
+""" Create Pull Request """
+import json
+import os
+import random
+import string
+import sys
+import time
+from git import Repo
+from github import Github, GithubException
+
+
+def get_github_event(github_event_path):
+    with open(github_event_path) as f:
+        github_event = json.load(f)
+    if bool(os.environ.get("DEBUG_EVENT")):
+        print(os.environ["GITHUB_EVENT_NAME"])
+        print(json.dumps(github_event, sort_keys=True, indent=2))
+    return github_event
+
+
+def get_head_short_sha1(repo):
+    return repo.git.rev_parse("--short", "HEAD")
+
+
+def get_random_suffix(size=7, chars=string.ascii_lowercase + string.digits):
+    return "".join(random.choice(chars) for _ in range(size))
+
+
+def remote_branch_exists(repo, branch):
+    for ref in repo.remotes.origin.refs:
+        if ref.name == ("origin/%s" % branch):
+            return True
+    return False
+
+
+def get_author_default(event_name, event_data):
+    if event_name == "push":
+        email = "{head_commit[author][email]}".format(**event_data)
+        name = "{head_commit[author][name]}".format(**event_data)
+    else:
+        email = os.environ["GITHUB_ACTOR"] + "@users.noreply.github.com"
+        name = os.environ["GITHUB_ACTOR"]
+    return email, name
+
+
+def get_repo_url(token, github_repository):
+    return "https://x-access-token:%s@github.com/%s" % (token, github_repository)
+
+
+def checkout_branch(git, remote_exists, branch):
+    if remote_exists:
+        print("Checking out branch '%s'" % branch)
+        git.stash("--include-untracked")
+        git.checkout(branch)
+        try:
+            git.stash("pop")
+        except BaseException:
+            git.checkout("--theirs", ".")
+            git.reset()
+    else:
+        print("Creating new branch '%s'" % branch)
+        git.checkout("HEAD", b=branch)
+
+
+def push_changes(git, token, github_repository, branch, commit_message):
+    git.add("-A")
+    git.commit(m=commit_message)
+    repo_url = get_repo_url(token, github_repository)
+    return git.push("-f", repo_url, f"HEAD:refs/heads/{branch}")
+
+
+def cs_string_to_list(str):
+    # Split the comma separated string into a list
+    l = [i.strip() for i in str.split(",")]
+    # Remove empty strings
+    return list(filter(None, l))
+
+
+def create_project_card(github_repo, project_name, project_column_name, pull_request):
+    # Locate the project by name
+    project = None
+    for project_item in github_repo.get_projects("all"):
+        if project_item.name == project_name:
+            project = project_item
+            break
+
+    if not project:
+        print("::warning::Project not found. Unable to create project card.")
+        return
+
+    # Locate the column by name
+    column = None
+    for column_item in project.get_columns():
+        if column_item.name == project_column_name:
+            column = column_item
+            break
+
+    if not column:
+        print("::warning::Project column not found. Unable to create project card.")
+        return
+
+    # Create a project card for the pull request
+    column.create_card(content_id=pull_request.id, content_type="PullRequest")
+    print(
+        "Added pull request #%d to project '%s' under column '%s'"
+        % (pull_request.number, project.name, column.name)
+    )
+
+
+def process_event(github_token, github_repository, repo, branch, base):
+    # Fetch optional environment variables with default values
+    commit_message = os.getenv(
+        "COMMIT_MESSAGE", "Auto-committed changes by create-pull-request action"
+    )
+    title = os.getenv(
+        "PULL_REQUEST_TITLE", "Auto-generated by create-pull-request action"
+    )
+    body = os.getenv(
+        "PULL_REQUEST_BODY",
+        "Auto-generated pull request by "
+        "[create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub Action",
+    )
+    # Fetch optional environment variables with no default values
+    pull_request_labels = os.environ.get("PULL_REQUEST_LABELS")
+    pull_request_assignees = os.environ.get("PULL_REQUEST_ASSIGNEES")
+    pull_request_milestone = os.environ.get("PULL_REQUEST_MILESTONE")
+    pull_request_reviewers = os.environ.get("PULL_REQUEST_REVIEWERS")
+    pull_request_team_reviewers = os.environ.get("PULL_REQUEST_TEAM_REVIEWERS")
+    project_name = os.environ.get("PROJECT_NAME")
+    project_column_name = os.environ.get("PROJECT_COLUMN_NAME")
+
+    # Push the local changes to the remote branch
+    print("Pushing changes to 'origin/%s'" % branch)
+    push_result = push_changes(
+        repo.git, github_token, github_repository, branch, commit_message
+    )
+    print(push_result)
+
+    # Create the pull request
+    github_repo = Github(github_token).get_repo(github_repository)
+    try:
+        pull_request = github_repo.create_pull(
+            title=title, body=body, base=base, head=branch
+        )
+        print(
+            "Created pull request #%d (%s => %s)" % (pull_request.number, branch, base)
+        )
+    except GithubException as e:
+        if e.status == 422:
+            # Format the branch name
+            head_branch = "%s:%s" % (github_repository.split("/")[0], branch)
+            # Get the pull request
+            pull_request = github_repo.get_pulls(
+                state="open", base=base, head=head_branch
+            )[0]
+            print(
+                "Updated pull request #%d (%s => %s)"
+                % (pull_request.number, branch, base)
+            )
+        else:
+            print(str(e))
+            sys.exit(1)
+
+    # Set the output variables
+    os.system("echo ::set-env name=PULL_REQUEST_NUMBER::%d" % pull_request.number)
+    os.system("echo ::set-output name=pr_number::%d" % pull_request.number)
+
+    # Set labels, assignees and milestone
+    if pull_request_labels is not None:
+        print("Applying labels '%s'" % pull_request_labels)
+        pull_request.as_issue().edit(labels=cs_string_to_list(pull_request_labels))
+    if pull_request_assignees is not None:
+        print("Applying assignees '%s'" % pull_request_assignees)
+        pull_request.as_issue().edit(
+            assignees=cs_string_to_list(pull_request_assignees)
+        )
+    if pull_request_milestone is not None:
+        print("Applying milestone '%s'" % pull_request_milestone)
+        milestone = github_repo.get_milestone(int(pull_request_milestone))
+        pull_request.as_issue().edit(milestone=milestone)
+
+    # Set pull request reviewers
+    if pull_request_reviewers is not None:
+        print("Requesting reviewers '%s'" % pull_request_reviewers)
+        try:
+            pull_request.create_review_request(
+                reviewers=cs_string_to_list(pull_request_reviewers)
+            )
+        except GithubException as e:
+            # Likely caused by "Review cannot be requested from pull request
+            # author."
+            if e.status == 422:
+                print("Requesting reviewers failed - %s" % e.data["message"])
+
+    # Set pull request team reviewers
+    if pull_request_team_reviewers is not None:
+        print("Requesting team reviewers '%s'" % pull_request_team_reviewers)
+        pull_request.create_review_request(
+            team_reviewers=cs_string_to_list(pull_request_team_reviewers)
+        )
+
+    # Create a project card for the pull request
+    if project_name is not None and project_column_name is not None:
+        try:
+            create_project_card(
+                github_repo, project_name, project_column_name, pull_request
+            )
+        except GithubException as e:
+            # Likely caused by "Project already has the associated issue."
+            if e.status == 422:
+                print(
+                    "Create project card failed - %s" % e.data["errors"][0]["message"]
+                )
+
+
+# Fetch environment variables
+github_token = os.environ["GITHUB_TOKEN"]
+github_repository = os.environ["GITHUB_REPOSITORY"]
+github_ref = os.environ["GITHUB_REF"]
+event_name = os.environ["GITHUB_EVENT_NAME"]
+# Get the JSON event data
+event_data = get_github_event(os.environ["GITHUB_EVENT_PATH"])
+
+# Get the default for author email and name
+author_email, author_name = get_author_default(event_name, event_data)
+# Set author name and email overrides
+author_name = os.getenv("COMMIT_AUTHOR_NAME", author_name)
+author_email = os.getenv("COMMIT_AUTHOR_EMAIL", author_email)
+# Set committer name and email overrides
+committer_name = os.getenv("COMMITTER_NAME", author_name)
+committer_email = os.getenv("COMMITTER_EMAIL", author_email)
+
+# Set the repo to the working directory
+repo = Repo(os.getcwd())
+# Set git environment. This will not persist after the action completes.
+print("Configuring git author as '%s <%s>'" % (author_name, author_email))
+print("Configuring git committer as '%s <%s>'" % (committer_name, committer_email))
+repo.git.update_environment(
+    GIT_AUTHOR_NAME=author_name,
+    GIT_AUTHOR_EMAIL=author_email,
+    GIT_COMMITTER_NAME=committer_name,
+    GIT_COMMITTER_EMAIL=committer_email,
+)
+
+# Fetch/Set the branch name
+branch_prefix = os.getenv("PULL_REQUEST_BRANCH", "create-pull-request/patch")
+# Fetch an optional base branch override
+base_override = os.environ.get("PULL_REQUEST_BASE")
+
+# Set the base branch
+if base_override is not None:
+    base = base_override
+    print("Overriding the base with branch '%s'" % base)
+    checkout_branch(repo.git, True, base)
+elif github_ref.startswith("refs/pull/"):
+    # Check the PR is not raised from a fork of the repository
+    head_repo = "{pull_request[head][repo][full_name]}".format(**event_data)
+    if head_repo != github_repository:
+        print(
+            "::warning::Pull request was raised from a fork of the repository. "
+            + "Limitations on forked repositories have been imposed by GitHub Actions. "
+            + "Unable to continue. Exiting."
+        )
+        sys.exit()
+    # Switch to the merging branch instead of the merge commit
+    base = os.environ["GITHUB_HEAD_REF"]
+    print(
+        "Removing the merge commit by switching to the pull request head branch '%s'"
+        % base
+    )
+    checkout_branch(repo.git, True, base)
+elif github_ref.startswith("refs/heads/"):
+    base = github_ref[11:]
+    print("Currently checked out base assumed to be branch '%s'" % base)
+else:
+    print(
+        f"::warning::Currently checked out ref '{github_ref}' is not a valid base for a pull request. "
+        + "Unable to continue. Exiting."
+    )
+    sys.exit()
+
+# Skip if the current branch is a PR branch created by this action.
+# This may occur when using a PAT instead of GITHUB_TOKEN because
+# a PAT allows workflow actions to trigger further events.
+if base.startswith(branch_prefix):
+    print("Branch '%s' was created by this action. Skipping." % base)
+    sys.exit()
+
+# Fetch an optional environment variable to determine the branch suffix
+branch_suffix = os.getenv("BRANCH_SUFFIX", "short-commit-hash")
+if branch_suffix == "short-commit-hash":
+    # Suffix with the short SHA1 hash
+    branch = "%s-%s" % (branch_prefix, get_head_short_sha1(repo))
+elif branch_suffix == "timestamp":
+    # Suffix with the current timestamp
+    branch = "%s-%s" % (branch_prefix, int(time.time()))
+elif branch_suffix == "random":
+    # Suffix with the current timestamp
+    branch = "%s-%s" % (branch_prefix, get_random_suffix())
+elif branch_suffix == "none":
+    # Fixed branch name
+    branch = branch_prefix
+else:
+    print("Branch suffix '%s' is not a valid value." % branch_suffix)
+    sys.exit(1)
+
+# Output head branch
+print("Pull request branch to create/update set to '%s'" % branch)
+
+# Check if the determined head branch exists as a remote
+remote_exists = remote_branch_exists(repo, branch)
+if remote_exists:
+    print(
+        "Pull request branch '%s' already exists as remote branch 'origin/%s'"
+        % (branch, branch)
+    )
+    if branch_suffix == "short-commit-hash":
+        # A remote branch already exists for the HEAD commit
+        print(
+            "Pull request branch '%s' already exists for this commit. Skipping."
+            % branch
+        )
+        sys.exit()
+    elif branch_suffix in ["timestamp", "random"]:
+        # Generated branch name collision with an existing branch
+        print(
+            "Pull request branch '%s' collided with a branch of the same name. Please re-run."
+            % branch
+        )
+        sys.exit(1)
+
+# Checkout branch
+checkout_branch(repo.git, remote_exists, branch)
+
+# Check if there are changes to pull request
+if remote_exists:
+    print(
+        "Checking for local working copy changes indicating a "
+        + "diff with existing pull request branch 'origin/%s'" % branch
+    )
+else:
+    print(
+        "Checking for local working copy changes indicating a "
+        + "diff with base 'origin/%s'" % base
+    )
+
+if repo.is_dirty() or len(repo.untracked_files) > 0:
+    print("Modified or untracked files detected.")
+    process_event(github_token, github_repository, repo, branch, base)
+else:
+    print("No modified or untracked files detected. Skipping.")

src/requirements.txt

@@ -0,0 +1,2 @@
+GitPython==3.0.8
+PyGithub==1.46

src/setup-python.js

@@ -0,0 +1,52 @@
+const core = require("@actions/core");
+const tc = require("@actions/tool-cache");
+const path = require("path");
+const semver = require("semver");
+
+/**
+ * Setup for Python from the GitHub Actions tool cache
+ * Converted from https://github.com/actions/setup-python
+ *
+ * @param {string} versionSpec version of Python
+ * @param {string} arch architecture (x64|x32)
+ */
+let setupPython = function(versionSpec, arch) {
+  return new Promise((resolve, reject) => {
+    const IS_WINDOWS = process.platform === "win32";
+
+    // Find the version of Python we want in the tool cache
+    const installDir = tc.find("Python", versionSpec, arch);
+    core.debug(`installDir: ${installDir}`);
+
+    // Set paths
+    core.exportVariable("pythonLocation", installDir);
+    core.addPath(installDir);
+    if (IS_WINDOWS) {
+      core.addPath(path.join(installDir, "Scripts"));
+    } else {
+      core.addPath(path.join(installDir, "bin"));
+    }
+
+    if (IS_WINDOWS) {
+      // Add --user directory
+      // `installDir` from tool cache should look like $AGENT_TOOLSDIRECTORY/Python/<semantic version>/x64/
+      // So if `findLocalTool` succeeded above, we must have a conformant `installDir`
+      const version = path.basename(path.dirname(installDir));
+      const major = semver.major(version);
+      const minor = semver.minor(version);
+
+      const userScriptsDir = path.join(
+        process.env["APPDATA"] || "",
+        "Python",
+        `Python${major}${minor}`,
+        "Scripts"
+      );
+      core.addPath(userScriptsDir);
+    }
+    // On Linux and macOS, pip will create the --user directory and add it to PATH as needed.
+
+    resolve();
+  });
+};
+
+module.exports = setupPython;