build-validation.yml

name: "MPTCP Upstream Build Validation"
on:
  push:
    branches-ignore:
      - 'archived/**'    # previous branches
      - 't/**'           # TopGit tree
      - 'net'            # part of the TopGit tree
      - 'net-next'       # part of the TopGit tree
      - 'for-review'     # part of the TopGit tree
      - 'for-review-net' # part of the TopGit tree
    tags:
      - 'patchew/**'     # patchew is using tags
      # ideally, we would take 'export/**' but the cache is per branch...
      # In other words, when using tags, we can only use the cache if we re-tag.
      # https://github.com/actions/cache/issues/556
      # So we build the "export" branch and we try to find the tag later

env:
  CURL_OPT: "--no-progress-meter --connect-timeout 30 --retry 20 --retry-delay 10"
  CURL_ACC: "Accept: application/vnd.github.v3+json"
  URI: "https://api.github.com"
  PW: "https://patchwork.kernel.org/api/1.2"

permissions: {}

jobs:
  build:
    name: "Build (matrix)"
    if: "! startswith(github.ref, 'refs/tags/patchew/') || contains(github.event.head_commit.message, 'Message-Id: ')"
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        defconfig: ['x86_64', 'i386']
        ipv6: ['with_ipv6', 'without_ipv6']
        mptcp: ['with_mptcp', 'without_mptcp']
    permissions:
      contents: read # to fetch code (actions/checkout)

    steps:
      - name: "Checkout (light)"
        if: github.ref != 'refs/heads/export'
        uses: actions/checkout@v4
        with:
          fetch-depth: 100 # we should not have more commits on top of export and -net

      - name: "Checkout (export)"
        if: github.ref == 'refs/heads/export'
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # we need to fetch all commits between net and net-next, quicker to get everything

      - name: "Find base branch"
        id: branch
        run: |
          if [ "${REF_NAME}" = "export" ]; then  # just to avoid the next cmd
            echo "name=export" >> ${GITHUB_OUTPUT}
          elif [ -n "$(git log -1 --grep "^DO-NOT-MERGE: mptcp: enabled by default (net)$" --format="format:%H" HEAD -- net/mptcp/Kconfig)" ]; then
            echo "name=export-net" >> ${GITHUB_OUTPUT}
          else
            echo "name=export" >> ${GITHUB_OUTPUT}
          fi
        env:
          REF_NAME: ${{ github.ref_name }}

      - name: "Restore cache for CCache"
        uses: actions/cache/restore@v4
        id: restore-ccache
        with:
          path: ${{ github.workspace }}/.ccache
          key: ${{ runner.os }}_build_${{ matrix.defconfig }}_${{ matrix.ipv6 }}_${{ matrix.mptcp }}_${{ steps.branch.outputs.name }}-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}_build_${{ matrix.defconfig }}_${{ matrix.ipv6 }}_${{ matrix.mptcp }}_${{ steps.branch.outputs.name }}-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.sha }}
            ${{ runner.os }}_build_${{ matrix.defconfig }}_${{ matrix.ipv6 }}_${{ matrix.mptcp }}_${{ steps.branch.outputs.name }}-${{ github.run_id }}-${{ github.run_attempt }}-
            ${{ runner.os }}_build_${{ matrix.defconfig }}_${{ matrix.ipv6 }}_${{ matrix.mptcp }}_${{ steps.branch.outputs.name }}-${{ github.run_id }}-
            ${{ runner.os }}_build_${{ matrix.defconfig }}_${{ matrix.ipv6 }}_${{ matrix.mptcp }}_${{ steps.branch.outputs.name }}-

      - name: "Build Validation"
        uses: multipath-tcp/mptcp-upstream-validate-export-action@main
        with:
          # we want to validate each commits on top of net-next/export (or -net) except for stable
          each_commit: ${{ ! startswith(github.ref, 'refs/heads/stable/') }}
          ccache_maxsize: 350M ## 10GB = project limit
          defconfig: ${{ matrix.defconfig }}
          ipv6: ${{ matrix.ipv6 }}
          mptcp: ${{ matrix.mptcp }}
          debug: ${{ runner.debug }}

      - name: "Artifacts"
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: results-${{ matrix.defconfig }}_${{ matrix.ipv6 }}_${{ matrix.mptcp }}
          path: ./build-*-results.txt

      - name: "Publish details"
        if: always()
        run: |
          if stat ./build-*-results.txt &>/dev/null; then
            echo '- Results for ${{ matrix.defconfig }} ${{ matrix.ipv6 }} ${{ matrix.mptcp }}:' >> ${GITHUB_STEP_SUMMARY}
            echo "\`\`\`" >> ${GITHUB_STEP_SUMMARY}
            cat ./build-*-results.txt >> ${GITHUB_STEP_SUMMARY}
            echo "\`\`\`" >> ${GITHUB_STEP_SUMMARY}
          fi

      - name: "Save cache for CCache"
        if: github.ref == 'refs/heads/export' || github.ref == 'refs/heads/export-net'
        uses: actions/cache/save@v4
        with:
          path: ${{ github.workspace }}/.ccache
          key: ${{ steps.restore-ccache.outputs.cache-primary-key }}

  notif-export:
    name: "Notifications export branches"
    needs: build
    # only for the official repo, export branches
    if: always() && github.repository_owner == 'multipath-tcp' && (github.ref == 'refs/heads/export' || github.ref == 'refs/heads/export-net')
    runs-on: ubuntu-latest
    steps:
      - name: get linked tag
        id: tag
        run: |
          TAG=$(curl ${CURL_OPT} -H "${CURL_ACC}" -H "${CURL_AUTH}" "${URL}" | jq -r ".[] | select(.object.sha == \"${SHA}\").ref" | tail -n1)
          echo "Found: ${TAG} (${SHA} - ${BRANCH})"
          TAG="${TAG:10}"
          echo "tag=${TAG:-${BRANCH}}" >> ${GITHUB_OUTPUT}
        env:
          CURL_AUTH: "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}"
          URL: "${{ env.URI }}/repos/${{ github.repository }}/git/matching-refs/tags/"
          SHA: "${{ github.sha }}"
          BRANCH: "${{ github.ref_name }}"

      - name: irc build
        uses: rectalogic/notify-irc@v2
        with:
          server: irc.libera.chat
          channel: "#mptcp-ci"
          nickname: gh-build-bot
          verbose: true
          message: |-
            New build validating ${{ steps.tag.outputs.tag }} (by ${{ github.actor }}) ended with ${{ needs.build.result }}: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}

      - name: irc build error
        if: needs.build.result == 'failure'
        uses: rectalogic/notify-irc@v2
        with:
          server: irc.libera.chat
          channel: "#mptcp"
          nickname: gh-build-bot
          verbose: true
          message: |-
            New build validating ${{ steps.tag.outputs.tag }} (by ${{ github.actor }}) failed: ${{ needs.build.result }}: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}

  notif-patchew:
    name: "Notifications patchew tags"
    needs: build
    # only for the official repo, patchew tags branches
    if: always() && github.repository_owner == 'multipath-tcp' && startswith(github.ref, 'refs/tags/patchew/') && (needs.build.result == 'success' || needs.build.result == 'failure')
    runs-on: ubuntu-latest
    steps:
      - uses: actions/download-artifact@v4
        with:
          pattern: results-*
          merge-multiple: true

      - name: "Patchwork"
        run: |
          # $1: mid
          get_status() {
            case "$(awk "/^${1} /{ print \$2 }" build-*-results.txt | sort -u)" in
              'fail'*)    echo "fail"; ;;
              *'warning') echo "warning"; ;;
              'success')  echo "success"; ;;
              *)          echo "fail"; ;;
            esac
          }

          # $1: mid, $2: status
          get_desc() {
            awk "/^${1} ${2} /{
              out=\$3
              for(i=4; i<=NF; i++)
                out=out\" \"\$i
              print out
            }" build-*-results.txt | sort -u | sed '$!{:a;N;s/\n/ ; /;ta}'
          }

          # $1: mid, $2: status, $3: desc
          _send() { local check_url
            check_url="$(curl "${URL_PW}${1}" | jq -r 'last(.[].checks)')"
            if [ -z "${check_url}" ] || [ "${check_url}" = "null" ]; then
              echo "URL not found: '${check_url}' '${URL_PW}${1}'"
              return 1
            fi

            curl ${CURL_OPT} \
              -X POST \
              -H "Authorization: Token ${{ secrets.PW_TOKEN }}" \
              -F "state=${2}" \
              -F "target_url=${URL_GH}" \
              -F "context=build" \
              -F "description=${3}" \
              "${check_url}" | jq '.'
          }

          FIRST=1
          send() { local i
            # patches can take a bit of time to appear: retry the first time
            if [ "${FIRST}" = "1" ]; then
              FIRST=0

              for i in $(seq 45); do
                if _send "${@}"; then
                  echo "Successful sent after ${i} attempts"
                  return 0
                fi
                sleep 1m
              done

              curl "${URL_PW}${1}"
              return 1
            else
              _send "${@}"
            fi
          }

          if ! ls ./build-*-results.txt; then
            echo "Strange, no results, please check why"
            exit 1
          fi

          while read -r mid; do
            status=$(get_status "${mid}")
            desc=$(get_desc "${mid}" "${status}")
            send "${mid}" "${status}" "${desc}"
          done < <(awk '{ print $1 }' build-*-results.txt | sort -u)
        env:
          URL_GH: "${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
          URL_PW: "${{ env.PW }}/patches/?project=mptcp&msgid="

      - name: get commit info
        id: commit
        if: needs.build.result == 'failure'
        run: |
          cat <<'EOF' > commit.json
          ${{ toJSON(github.event.head_commit) }}
          EOF

          # ignore error, just in case the MID has not been added by the author
          read -r TAG MID < <(jq -r '.message' commit.json | grep "^Message-Id: " | tail -n1) || true

          # Guess the subject from the last commit
          SUBJECT=$(jq -r '.message' commit.json | head -n1)

          if [ -n "${MID:1:-1}" ]; then
            # get cover-letter and series' name if any
            URL_PW_SERIES_API=$(curl "${URL_PW}${MID:1:-1}" | jq -er 'last(last(.[].series)[].url)' || true)
            if [ -n "${URL_PW_SERIES_API}" ] && [ "${URL_PW_SERIES_API}" != "null" ]; then
              echo "series=${URL_PW_SERIES}$(basename "${URL_PW_SERIES_API}")" >> ${GITHUB_OUTPUT}
              if curl "${URL_PW_SERIES_API}" > pw_series.json && [ -s pw_series.json ]; then
                CL="$(jq '.cover_letter' pw_series.json || true)"
                if [ -n "${CL}" ] && [ "${CL}" != "null" ] && [ "${CL}" != "{}" ]; then
                  MID=$(echo "${CL}" | jq -er '.msgid' || echo "${MID}")
                  SUBJECT=$(jq -er '.name' pw_series.json || echo "${SUBJECT}")
                fi
              fi
            fi

            # get tags from Lore: not fully available from Patchwork
            SUBJECT="$(curl "${URL_LORE//MID/${MID:1:-1}}" | grep '^Subject: ' | head -n1 | sed 's/^Subject: \(\[.*\] \).*/\1/')${SUBJECT}"
          fi

          echo "Found message ID: '${TAG}' '${MID}'"
          echo "mid=${MID:1:-1}" >> ${GITHUB_OUTPUT}

          echo "Found subject: '${SUBJECT}'"
          echo "subject=${SUBJECT}" >> ${GITHUB_OUTPUT}

          NAME=$(jq -r '.author.name' commit.json)
          EMAIL=$(jq -r '.author.email' commit.json)
          echo "Found author: '${NAME}' '${EMAIL}'"
          echo "name=${NAME%% *}" >> ${GITHUB_OUTPUT}
          echo "author=${NAME} <${EMAIL}>" >> ${GITHUB_OUTPUT}

          SHA=$(jq -r '.id' commit.json)
          echo "Found SHA: '${SHA}' ('${SHA:0:12}')"
          echo "sha=${SHA:0:12}" >> ${GITHUB_OUTPUT}

          COMMITTER=$(jq -r '.committer.name' commit.json)
          echo "Found committer: '${COMMITTER}'"
          echo "committer=${COMMITTER}" >> ${GITHUB_OUTPUT}
        env:
          URL_PW: "${{ env.PW }}/patches/?project=mptcp&msgid="
          URL_PW_SERIES: "https://patchwork.kernel.org/project/mptcp/list/?series="
          URL_LORE: "https://lore.kernel.org/mptcp/MID/raw"

      - name: send email
        if: needs.build.result == 'failure'
        uses: dawidd6/action-send-mail@v3
        with:
          server_address: smtp.gmail.com
          server_port: 465
          username: ${{ secrets.MAIL_USERNAME }}
          password: ${{ secrets.MAIL_PASSWORD }}
          to: ${{ steps.commit.outputs.author }}
          cc: mptcp@lists.linux.dev
          from: MPTCP CI
          reply_to: mptcp@lists.linux.dev
          in_reply_to: "<${{ steps.commit.outputs.mid }}>"
          subject: "Re: ${{ steps.commit.outputs.subject }}"
          body: |
            Hi ${{ steps.commit.outputs.name }},

            Thank you for your modifications, that's great!

            But sadly, our CI spotted some issues with it when trying to build it.

            You can find more details there:

              ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}

            Status: ${{ needs.build.result }}
            Initiator: ${{ steps.commit.outputs.committer }}
            Commits: ${{ github.server_url }}/${{ github.repository }}/commits/${{ steps.commit.outputs.sha }}
            Patchwork: ${{ steps.commit.outputs.series }}

            Feel free to reply to this email if you cannot access logs, if you need
            some support to fix the error, if this doesn't seem to be caused by your
            modifications or if the error is a false positive one.

            Cheers,
            MPTCP GH Action bot
            Bot operated by Matthieu Baerts (NGI0 Core)