[Idea] Automatically apply fixes as a pull request

This has been successfully achieved using another workflow. I recommend not including this in pull_request workflows because a PR from a fork has no write access to the original project, whereas the push fixes will get applied to the fork directly instead. Given that this can already be solved with existing actions I won't be adding this to the action, but would like to write up a recipe book including this at some point.

name: Fixes
on:
  push:
    branches: ['**']

jobs:
  lint:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
      - name: Extract branch name
        shell: bash
        run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
        id: extract_branch
      - name: Get yarn cache directory
        id: yarn-cache-dir
        run: echo "::set-output name=path::$(yarn cache dir)"
      - uses: actions/cache@v1
        id: yarn-cache
        with:
          path: ${{ steps.yarn-cache-dir.outputs.path }}
          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-yarn-
      - uses: actions/cache@v1
        id: elm-cache
        with:
          path: ~/.elm
          key: ${{ runner.os }}-elm--home-${{ hashFiles('**/elm.json') }}
      - name: Install dependencies
        run: yarn install --frozen-lockfile
      - name: Add yarn bin to path
        run: echo ::add-path::$(yarn bin)
      - name: Run elm-format
        run: elm-format --yes
      - name: Apply elm-review fixes
        id: elm-review
        run: yes | elm-review --fix-all
        continue-on-error: true
      - uses: peter-evans/create-pull-request@v2
        with:
          commit-message: 'Apply elm-review fixes'
          branch: fixes/${{ steps.extract_branch.outputs.branch }}
          title: "Apply elm-review fixes"
          body: "*This is an automated pull request because elm-review found problems that could be fixed automatically.*"
          reviewers: sparksp
          assignees: sparksp

sparksp / elm-review-action

[Idea] Automatically apply fixes as a pull request #9