Feat/create action

.github/workflows/commitlint.yml

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+name: Commitlint
+on: [pull_request]
+
+jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v1
+      - uses: ./

.prettierrc

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+{
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "semi": false,
+  "singleQuote": true
+}

Dockerfile

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+FROM node:10
+
+COPY package*.json /
+
+RUN npm ci --production
+
+COPY . .
+
+ENTRYPOINT ["/entrypoint.sh"]

README.md

@@ -1,2 +1,40 @@
-# commitlint-pr-action
+# Commitlint Github Action
+
 Lints Pull Request commits with commitlint
+
+## Usage
+
+Create a github workflow in the `.github` folder, e.g. `.github/workflows/commitlint.yml`:
+
+```yaml
+name: Commitlint
+on: [pull_request]
+
+jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v1
+      - uses: wagoid/[email protected]
+```
+
+## Inputs
+
+### `configFile`
+
+The path to your commitlint config file. Default `commitlint.config.js`.
+
+## About `extends` in your config file
+
+This is a [`Docker` action](https://github.com/actions/toolkit/blob/e2adf403d6d14a9ca7474976ccaca20f72ff8209/docs/action-types.md#why-would-i-choose-a-docker-action), and was made like this so that you can run it with minimum setup, regardless of your repo's environment. It comes packed with the most famous shared configurations that you can use in your commitlint config's `extends` field:
+
+- [@commitlint/config-angular](./@commitlint/config-angular)
+- [@commitlint/config-conventional](./@commitlint/config-conventional)
+- [@commitlint/config-lerna-scopes](./@commitlint/config-lerna-scopes)
+- [@commitlint/config-patternplate](./@commitlint/config-patternplate)
+- [conventional-changelog-lint-config-canonical](https://github.com/gajus/conventional-changelog-lint-config-canonical)
+- [commitlint-config-jira](https://github.com/Gherciu/commitlint-jira)
+
+If you have a custom shared config that lies in a private registry, let us know! We will be happy to cover this case if necessary.

action.yml

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+name: 'Commitlint'
+description: 'Lints commit messages with commitlint'
+author: 'Wagner Santos'
+inputs:
+  configFile:
+    description: 'commitlint config file'
+    default: './commitlint.config.js'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+branding:
+  icon: 'check-square'
+  color: 'blue'

commitlint.config.js

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+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+}

entrypoint.sh

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+#!/bin/sh
+
+set -e
+
+cd ${GITHUB_WORKSPACE}
+
+NODE_PATH=/node_modules node /run.js