name: "Treewide Checks"
permissions: read-all

on:
  pull_request:
  workflow_dispatch:
  push:
    branches:
      - main
    paths-ignore:
      - assets/**

jobs:
  nix-flake-check:
    name: "Validate flake"
    runs-on: ubuntu-latest
    if: "!contains(github.event.pull_request.title, '[skip ci]')"
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Check Flake
        run: nix flake check

  format-with-alejandra:
    name: "Check formatting"
    runs-on: ubuntu-latest
    if: "!contains(github.event.pull_request.title, '[skip ci]')"
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Check formatting via Alejandra
        run: nix run nixpkgs#alejandra -- -c .

  check-typos:
    name: "Check source tree for typos"
    runs-on: ubuntu-latest
    if: "!contains(github.event.pull_request.title, '[skip ci]')"
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Check for typos
        uses: crate-ci/typos@master
        with:
          config: .github/typos.toml

      - if: ${{ failure() }}
        shell: bash
        run: |
          echo "::error:: Current codebase contains typos that were caught by the CI!"
          echo "If those typos were intentional, please add them to the ignored regexes in .github/typos.toml"
          echo "[skip ci] label may be added to the PR title if this is a one-time issue and is safe to ignore"
          exit 1

  flake-docs-check:
    name: "Validate documentation builds"
    runs-on: ubuntu-latest
    if: "!contains(github.event.pull_request.title, '[skip ci]')"
    strategy:
      matrix:
        package:
          - docs
          - docs-html
          - docs-manpages
          - docs-json
    steps:
      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Checkout
        uses: actions/checkout@v4

      - name: Set default git branch (to reduce log spam)
        run: git config --global init.defaultBranch main

      - name: Build documentation packages
        run: nix build .#${{ matrix.package }} --print-build-logs

      - name: Get current date
        id: get-date
        # output format: 2023-12-22-120000
        run: echo "date=$(date +'%Y-%m-%d-%H%M%S')" >> ${GITHUB_OUTPUT}

      - name: Upload doc artifacts
        uses: actions/upload-artifact@v4
        with:
          name: "${{ matrix.package }}"
          path: result/share/doc/nvf

  flake-docs-linkcheck:
    name: "Validate hyperlinks in documentation sources"
    runs-on: ubuntu-latest
    if: "!contains(github.event.pull_request.title, '[skip ci]')"
    steps:
      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Checkout
        uses: actions/checkout@v4

      - name: Build linkcheck package
        run: nix build .#docs-linkcheck -Lv

  check-editorconfig:
    name: "Validate Editorconfig conformance"
    runs-on: ubuntu-latest
    if: "!contains(github.event.pull_request.title, '[skip ci]')"
    steps:
      - name: Get list of changed files from PR
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh api \
            repos/${{ github.repository }}/pulls/${{github.event.number}}/files --paginate \
            | jq '.[] | select(.status != "removed") | .filename' \
            > "$HOME/changed_files"

      - name: Print list of changed files
        run: |
          cat "$HOME/changed_files"

      - name: Checkout
        uses: actions/checkout@v4
        with:
          ref: refs/pull/${{ github.event.pull_request.number }}/merge

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Checking EditorConfig
        shell: bash
        run: |
          cat "$HOME/changed_files" | nix-shell -p editorconfig-checker.out \
            --run 'xargs -r editorconfig-checker -disable-indentation -exclude flake.lock --verbose'
          echo -n "Check status: $?"

      - if: ${{ failure() }}
        shell: bash
        run: |
          echo "::error:: Current formatting does not fit convention provided by .editorconfig located in the project root."
          echo "Please make sure your editor properly integrates editorconfig, Neovim does so by default."
          echo "See https://editorconfig.org/#download on how to integrate Editorconfig to your editor."
          exit 1