linters.yml

name: Linters

on:
  pull_request:
  workflow_dispatch:
permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  pre-commit:
    name: "Frappe Linter"
    runs-on: ubuntu-latest
    container:
      image: alpine:latest # latest used here for simplicity, not recommended
    defaults:
      run:
        shell: sh
    steps:
      - name: fix tar dependency in alpine container image
        run: |
          apk --no-cache add tar nodejs npm python3 git bash py3-pip
          npm install -g prettier
          # check python modules installed versions
          python3 -m pip freeze --local
          pip install pre-commit --break-system-packages

      - uses: actions/checkout@v6
      - run: |
          git config --global --add safe.directory $GITHUB_WORKSPACE
          git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*

      - name: Get changed files
        id: file_changes
        run: |
          export DIFF=$(git diff --name-only origin/${{ github.base_ref }} ${{ github.sha }})
          echo "Diff between ${{ github.base_ref }} and ${{ github.sha }}"
          echo "files=$( echo "$DIFF" | xargs echo )" >> $GITHUB_OUTPUT


      - name: Cache pre-commit since we use pre-commit from container
        uses: actions/cache@v5
        with:
          path: ~/.cache/pre-commit
          key: pre-commit-3|${{ hashFiles('.pre-commit-config.yaml') }}

      - name: Execute pre-commit
        run: |
          pre-commit run --color=always --show-diff-on-failure --files ${{ steps.file_changes.outputs.files }}