ci.yaml

name: CI

on:
  pull_request: {}
  push:
    branches:
      - master

jobs:
  build:
    name: Build
    strategy:
      fail-fast: false
      matrix:
        os:
          - 'ubuntu-latest'
#         - 'macos-latest'
        ocaml-version:
#         - 4.10.1
#         - 4.11.1
          - 4.12.0
        snapshot:
          - develop
          - stable-0-0-11
          - stable-0-0-10
          - stable-0-0-8
          - stable-0-0-7
          - stable-0-0-6--1
          - stable-0-0-6
          - stable-0-0-5
        include:
          - os: 'ubuntu-latest'
            ocaml-version: '4.07.1'
            snapshot: stable-0-0-4
    runs-on: ${{ matrix.os }}
    env:
      OPAMSOLVERTIMEOUT: 3600
      OPAMVERBOSE: 1
      SNAPSHOT: "snapshot-${{ matrix.snapshot }}"
    steps:
      - name: Checkout code (10 commits)
        uses: actions/checkout@v2
        with:
          fetch-depth: 10
          submodules: true

      - name: Fetch master branch (50 commits)
        run: |
          git remote set-branches --add origin master
          git fetch --depth 50 origin master

      - name: Output Run ID/Number
        run: echo ${{ github.run_id }} ${{ github.run_number }}
        
      - name: Determine the default OPAM Repo
        id: determine-default-opam-repo
        # See https://docs.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#runner-context
        # and https://github.com/ocaml/setup-ocaml/blob/4ac56b0fd440c3eef30fd1e34c96e0c740a807da/src/constants.ts#L45
        run: |
          if [ "${{ runner.os }}" = "Windows" ] ; then
            DEFAULT_OPAM_REPO="https://github.com/fdopen/opam-repository-mingw.git#opam2"
          else
            DEFAULT_OPAM_REPO="https://github.com/ocaml/opam-repository.git"
          fi
          echo "::set-output name=opam-repo-default::$(echo "$DEFAULT_OPAM_REPO")"

      - name: Setup OCaml ${{ matrix.ocaml-version }}
        uses: ocaml/setup-ocaml@v2
        with:
          ocaml-compiler: ${{ matrix.ocaml-version }}
          dune-cache: true
          cache-prefix: "snapshot-${{ matrix.snapshot }}"

          opam-depext: false
          opam-pin: false

          opam-repositories: |
            satysfi-external: https://github.com/gfngfn/satysfi-external-repo.git
            satyrographos-local: git+file://${{ github.workspace }}
            default: ${{ steps.determine-default-opam-repo.outputs.opam-repo-default }}

      - name: Create a dir for post-CI actions
        run: |
          set -exo pipefail
          mkdir pr

      - name: Check validity of the snapshot OPAM files
        run: |
          set -exo pipefail
          opam lint --strict *.opam

      - name: Check validity of the package OPAM files
        run: |
          set -exo pipefail
          echo "### OPAM Lint" | tee -a "pr/comment.txt"
          git diff --name-status origin/master... -- packages/ | sed -e '/^D/d' -e 's/^\w*\s//' -e '/\/opam/!d' | xargs opam lint --color=never --strict | tee -a "pr/comment.txt"

      - name: Install the snapshot
        run: |
          opam pin add "${SNAPSHOT}.dev" . --no-action
          opam depext "$SNAPSHOT" --yes
          opam install "$SNAPSHOT" --yes

      - name: Check if snapshot is consistent
        run: |
          set -exo pipefail
          export OPAMCOLOR=never
          comm --nocheck-order -13 <(opam list 'satysfi-*' --short --required-by "$SNAPSHOT") <(opam list 'satysfi-*' --short --recursive --required-by "$SNAPSHOT") > snapshot-diffs.txt
          echo "### Missing libraries in the snapshot" | tee -a "pr/comment.txt"
          cat snapshot-diffs.txt | tee -a "pr/comment.txt"
          # echo "Requiring libraries:"
          # cat snapshot-diffs.txt | xargs -r -L1 opam list 'satysfi-*' --recursive --required-by "$SNAPSHOT" --depends-on

      - name: Detect file collisions in installed SATySFI libraries
        run: |
          opam exec -- satyrographos install test-satysfi-root

      - name: Removing the snapshot
        run: |
          opam uninstall "$SNAPSHOT"

      - name: Build against snapshots and oldest deps
        run: |
          export COMMENT_FILE=pr/comment.txt
          export SKIP_REVERSE_DEPS=1
          echo "### Snapshots and oldest deps" >>"$COMMENT_FILE"
          ./ci.sh

      - name: Revdep tests
        run: |
          export COMMENT_FILE=pr/comment.txt
          export SKIP_OLDEST_DEPS=1
          echo "### Reverse deps" >>"$COMMENT_FILE"
          ./ci.sh

      - name: Test if the packages can be added to the snapshot
        if: github.event_name == 'pull_request' || github.event_name == 'pull_request_target'
        # continue-on-error: true
        id: test-update-snapshot
        run: |
          set -exo pipefail
          echo "$SNAPSHOT" > pr/id.txt
          echo "${{ matrix.snapshot }}; OCaml ${{ matrix.ocaml-version }}; ${{ matrix.os }}" > pr/matrix.txt
          echo "${{ github.event.pull_request.number }}" > pr/pull-number.txt
          echo "${{ github.run_id }}" > pr/run-id.txt
          git checkout "$SNAPSHOT.opam"
          scripts/update-snapshot --opam "$SNAPSHOT.opam"
          git diff HEAD -- "$SNAPSHOT.opam" | sed -ne '/^+ /{ s!^+ *"\([^"]*\)".*"\([^"]*\)".*$!\1.\2! ; p}' | tr '\n' ' ' > pr/packages.txt

          if git diff --quiet HEAD -- "$SNAPSHOT.opam" ; then
            echo 'no-updates' > pr/result.txt
            exit 0
          fi

          FAILED=
          git add "$SNAPSHOT.opam"
          git config --local user.email "action@github.com"
          git config --local user.name "GitHub Action"
          git commit -m 'Update snapshot'
          opam update
          if ! opam install "$SNAPSHOT" --yes --with-doc --with-test --verbose --dry-run ; then
            echo 'failed' > pr/result.txt
          elif ! opam install "$SNAPSHOT" --yes --with-doc --with-test --verbose ; then
            echo 'failed' > pr/result.txt
            FAILED=1
          else
            opam list --color=never 'satysfi-*' --short --required-by "$SNAPSHOT" > snapshot-deps.txt
            opam list --color=never 'satysfi-*' --short --recursive --required-by "$SNAPSHOT" > snapshot-recursive-deps.txt
            if ! diff -u snapshot-deps.txt snapshot-recursive-deps.txt | sed -e '1,/^@@/d' | awk 'BEGIN{ORS=" "; print "inconsistent-snapshot"}; /^[-+]/ {print}' > pr/result.txt ; then
              :
            else
              echo 'updated' > pr/result.txt
            fi
          fi

          opam uninstall "$SNAPSHOT" --yes
          
          if [ -n "$FAILED" ] ; then
            exit 1
          fi

      - uses: actions/upload-artifact@v2
        if: success() || failure()
        with:
          name: "pr-snapshot-${{ matrix.snapshot }}-${{ matrix.ocaml-version }}-${{ matrix.os }}"
          path: pr/