ci.yml

# Copyright (c) 2023 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

name: CI
on:
  # See: https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request.
  pull_request:
  # See: https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#push.
  push:
    branches:
      - '**'
    tags-ignore:
      - '**'

concurrency:
  group: ${{ github.event_name != 'pull_request' && github.run_id || github.ref }}
  cancel-in-progress: true

env:
  DANGER_RUN_CI_ON_HOST: 1
  CI_FAILFAST_TEST_LEAVE_DANGLING: 1  # GHA does not care about dangling processes and setting this variable avoids killing the CI script itself on error
  MAKEJOBS: '-j10'

jobs:
  test-each-commit:
    name: 'test each commit'
    runs-on: [self-hosted, ubuntu-22.04]
    if: github.event_name == 'pull_request' && github.event.pull_request.commits != 1
    timeout-minutes: 360  # Use maximum time, see https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idtimeout-minutes. Assuming a worst case time of 1 hour per commit, this leads to a --max-count=6 below.
    env:
      MAX_COUNT: 6
    steps:
      - name: Determine fetch depth
        run: echo "FETCH_DEPTH=$((${{ github.event.pull_request.commits }} + 2))" >> "$GITHUB_ENV"
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: ${{ env.FETCH_DEPTH }}
      - name: Determine commit range
        run: |
          # Checkout HEAD~ and find the test base commit
          # Checkout HEAD~ because it would be wasteful to rerun tests on the PR
          # head commit that are already run by other jobs.
          git checkout HEAD~
          # Figure out test base commit by listing ancestors of HEAD, excluding
          # ancestors of the most recent merge commit, limiting the list to the
          # newest MAX_COUNT ancestors, ordering it from oldest to newest, and
          # taking the first one.
          #
          # If the branch contains up to MAX_COUNT ancestor commits after the
          # most recent merge commit, all of those commits will be tested. If it
          # contains more, only the most recent MAX_COUNT commits will be
          # tested.
          #
          # In the command below, the ^@ suffix is used to refer to all parents
          # of the merge commit as described in:
          # https://git-scm.com/docs/git-rev-parse#_other_rev_parent_shorthand_notations
          # and the ^ prefix is used to exclude these parents and all their
          # ancestors from the rev-list output as described in:
          # https://git-scm.com/docs/git-rev-list
          echo "TEST_BASE=$(git rev-list -n$((${{ env.MAX_COUNT }} + 1)) --reverse HEAD ^$(git rev-list -n1 --merges HEAD)^@ | head -1)" >> "$GITHUB_ENV"
      - run: |
          sudo apt-get update
          sudo apt-get install clang-15 ccache build-essential libtool autotools-dev automake pkg-config bsdmainutils python3-zmq libevent-dev libboost-dev libsqlite3-dev libdb++-dev systemtap-sdt-dev libminiupnpc-dev libnatpmp-dev libqt5gui5 libqt5core5a libqt5dbus5 qttools5-dev qttools5-dev-tools qtwayland5 libqrencode-dev -y
      - name: Compile and run tests
        run: |
          # Run tests on commits after the last merge commit and before the PR head commit
          # Use clang++, because it is a bit faster and uses less memory than g++
          git rebase --exec "echo Running test-one-commit on \$( git log -1 ) && ./autogen.sh && CC=clang-15 CXX=clang++-15 ./configure && make clean && make -j $(nproc) check && ./test/functional/test_runner.py -j $(( $(nproc) * 2 ))" ${{ env.TEST_BASE }}