.github: allow building and releasing from maintenance branches

With 5.0 on master, maintenance releases move to a 4.x branch: run
push builds, docs deploy, and weekly distcheck for any N.x branch,
and mark only the highest stable tag as the latest release.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

.github/workflows/build.yml

@@ -1,12 +1,13 @@
 name: Bob the Builder
 
-# Run on all branches, including all pull requests, except the 'dev'
-# branch since that's where we run Coverity Scan (limited tokens/day)
+# Run on push to release branches (master and maintenance N.x), and
+# on all pull requests.  The 'dev' branch is where we run Coverity
+# Scan (limited tokens/day)
 on:
   push:
     branches:
-      - '**'
-      - '!dev'
+      - master
+      - '[0-9]+.x'
   pull_request:
     types: [opened, synchronize, reopened, labeled]
 
@@ -22,8 +23,6 @@ jobs:
     # Verify we can build on latest Ubuntu with both gcc and clang
     name: ${{ matrix.compiler }}
     runs-on: ubuntu-latest
-    # Skip redundant builds for PRs - prefer PR builds over push builds
-    if: github.event_name != 'push' || github.ref == 'refs/heads/master'
     strategy:
       matrix:
         compiler: [gcc, clang]

.github/workflows/docs.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - master
-      - 4.x
+      - '[0-9]+.x'
     paths:
       - 'doc/**'
       - 'README.md'

.github/workflows/release.yml

@@ -31,12 +31,17 @@ jobs:
         run: |
           ver=${GITHUB_REF#refs/tags/}
           echo "ver=${ver}" >> $GITHUB_OUTPUT
-          if echo $ver | grep -qE '^[0-9]+\.[0-9]+(\.[0-9]+)?(-alpha|-beta|-rc)[0-9]*$'; then
+          stable='[0-9]+\.[0-9]+(\.[0-9]+)?'
+          if echo $ver | grep -qE "^${stable}(-alpha|-beta|-rc)[0-9]*$"; then
             echo "pre=true"  >> $GITHUB_OUTPUT
           else
             echo "pre=false" >> $GITHUB_OUTPUT
           fi
-          if echo $ver | grep -qE '^[0-9.]+\.[0-9.]+(\.[0-9]+)?$'; then
+          # Mark as latest release only if this is the highest stable
+          # tag, so a 4.x maintenance release doesn't outrank 5.x
+          newest=$(git ls-remote --tags --refs origin | awk -F/ '{print $NF}' \
+                       | grep -E "^${stable}$" | sort -V | tail -1)
+          if [ "$ver" = "$newest" ]; then
             echo "latest=true"  >> $GITHUB_OUTPUT
           else
             echo "latest=false" >> $GITHUB_OUTPUT

.github/workflows/weekly.yml

@@ -14,22 +14,31 @@ jobs:
   schedule:
     runs-on: ubuntu-latest
     outputs:
-      run: ${{ steps.schedule.outputs.run }}
+      branches: ${{ steps.schedule.outputs.branches }}
     steps:
       - uses: actions/checkout@v4
-      - name: Check for any commits since last week
+        with:
+          fetch-depth: 0
+      - name: Check for branches with no commits since last week
         id: schedule
         run: |
-          commits="$(git log --format=%H --since='1 week ago')"
-          if [ -z "$commits" ]; then
-              echo "run=true"  >> $GITHUB_OUTPUT
-          else
-              echo "run=false" >> $GITHUB_OUTPUT
-          fi
+          branches=
+          maint=$(git branch -r --format='%(refname:lstrip=3)' | grep -E '^[0-9]+\.x$')
+          for branch in master $maint; do
+              commits="$(git log --format=%H --since='1 week ago' origin/$branch)"
+              if [ -z "$commits" ]; then
+                  branches="$branches\"$branch\","
+              fi
+          done
+          echo "branches=[${branches%,}]" >> $GITHUB_OUTPUT
   distcheck:
     needs: schedule
-    if: ${{ needs.schedule.outputs.run == 'true' }}
+    if: ${{ needs.schedule.outputs.branches != '[]' }}
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        branch: ${{ fromJSON(needs.schedule.outputs.branches) }}
+      fail-fast: false
     steps:
       - name: Install dependencies
         run: |
@@ -43,6 +52,8 @@ jobs:
           (cd libite-2.6.2 && ./configure && make -j9 && sudo make install-strip)
           sudo ldconfig
       - uses: actions/checkout@v4
+        with:
+          ref: ${{ matrix.branch }}
       - name: Base run
         run: |
           ./autogen.sh
@@ -63,5 +74,5 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: finit-weekly-test-logs
+          name: finit-weekly-test-logs-${{ matrix.branch }}
           path: finit-*/_build/sub/test/*.log