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Author: Github Actions

README.md

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+[![Build Status](https://github.com/pre-commit/action/workflows/deploy/badge.svg)](https://github.com/pre-commit/action/actions)
+
+pre-commit/action
+=================
+
+a GitHub action to run [pre-commit](https://pre-commit.com)
+
+### using this action
+
+To use this action, make a file `.github/workflows/pre-commit.yml`.  Here's a
+template to get started:
+
+```yaml
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-python@v1
+    - name: set PY
+      run: echo "::set-env name=PY::$(python --version --version | sha256sum | cut -d' ' -f1)"
+    - uses: actions/cache@v1
+      with:
+        path: ~/.cache/pre-commit
+        key: pre-commit|${{ env.PY }}|${{ hashFiles('.pre-commit-config.yaml') }}
+    - uses: pre-commit/[email protected]
+```
+
+This does a few things:
+
+- clones the code
+- installs python
+- sets up the `pre-commit` cache
+
+Hopefully in the future when `actions` matures the yaml can be simplified.
+
+### using this action in private repositories
+
+this action also provides an additional behaviour when used in private
+repositories.  when configured with a github token, the action will push back
+fixes to the pull request branch.
+
+here's an example configuration for that (use the template above except for the
+`pre-commit` action):
+
+```yaml
+    - uses: pre-commit/[email protected]
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+```
+
+note that `secrets.GITHUB_TOKEN` is automatically provisioned and will not
+require any special configuration.
+
+while you could _technically_ configure this for a public repository (using a
+personal access token), I can't think of a way to do this safely without
+exposing a privileged token to pull requests -- if you have any ideas, please
+leave an issue!

action.yml

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+name: pre-commit
+description: run pre-commit and optionally commit back to the pull request
+inputs:
+  token:
+    description: github token to clone / push with
+    required: false
+runs:
+  using: 'node12'
+  main: 'dist/index.js'