Improve Github Actions for Ubuntu and Fedora release packaging

* Build release packages for both Ubuntu-20.04 and Ubuntu-22.04. Both
  are LTS releases and release packages for both will be needed by other
  projects.
* Set CPACK_DEBIAN_PACKAGE_RELEASE during CMake packaging in the Github
  Actions workflow to append the intended Ubuntu release to the package
  version
* Enable CPACK_RPM_PACKAGE_RELEASE_DIST for RPM packaging in
  CMakeLists.txt such that %{?dist} is appended to the Release tag in
  the spec file to indicate the build environment distribution
* Let artifact upload fail (instead of warn) if no packages are found

.github/workflows/fedora-build.yaml

@@ -84,5 +84,6 @@ jobs:
     - name: Upload artifact
       uses: actions/upload-artifact@v3
       with:
-        name: tr31-${{env.GIT_DESCRIBE}}-fedora
+        name: tr31-${{ env.GIT_DESCRIBE }}-fedora36
         path: build/tr31-*.rpm
+        if-no-files-found: error

.github/workflows/ubuntu-build.yaml

@@ -42,9 +42,16 @@ jobs:
     - name: Test
       run: cmake --build build --target test
 
-  build-ubuntu-2004-release:
-    name: Ubuntu 20.04 build (release)
-    runs-on: ubuntu-20.04
+  build-ubuntu-release:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { name: "Ubuntu 20.04", os: ubuntu-20.04, ubuntu_release_name: "focal" }
+          - { name: "Ubuntu 22.04", os: ubuntu-22.04, ubuntu_release_name: "jammy" }
+
+    name: ${{ matrix.name }} build (release)
+    runs-on: ${{ matrix.os }}
 
     steps:
     - name: Install dependencies
@@ -59,12 +66,14 @@ jobs:
         submodules: recursive
 
     - name: Get version from git tag
-      run: |
-        git describe --always --dirty
-        echo "GIT_DESCRIBE=$(git describe --always --dirty)" >> $GITHUB_ENV
+      run: echo "GIT_DESCRIBE=$(git describe --always --dirty)" >> $GITHUB_ENV
 
     - name: Configure CMake
-      run: cmake -B build -DCMAKE_BUILD_TYPE="RelWithDebInfo" -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_SHARED_LIBS=YES -DBUILD_DOCS=YES -DCPACK_COMPONENTS_GROUPING=ALL_COMPONENTS_IN_ONE
+      # CPACK_DEBIAN_PACKAGE_RELEASE augments the package version for the
+      # intended Ubuntu release. The ppa1 component indicates that this is not
+      # an official Ubuntu package. The release name component indicates that
+      # this is for the specific Ubuntu release that has that name.
+      run: cmake -B build -DCMAKE_BUILD_TYPE="RelWithDebInfo" -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_SHARED_LIBS=YES -DBUILD_DOCS=YES -DCPACK_COMPONENTS_GROUPING=ALL_COMPONENTS_IN_ONE -DCPACK_DEBIAN_PACKAGE_RELEASE="0ubuntu1~ppa1~${{ matrix.ubuntu_release_name }}1"
 
     - name: Build
       run: cmake --build build
@@ -78,5 +87,6 @@ jobs:
     - name: Upload artifact
       uses: actions/upload-artifact@v3
       with:
-        name: tr31-${{env.GIT_DESCRIBE}}-ubuntu
+        name: tr31-${{ env.GIT_DESCRIBE }}-${{ matrix.os }}
         path: build/tr31_*.deb
+        if-no-files-found: error

CMakeLists.txt

@@ -216,6 +216,7 @@ if(rpmbuild_FOUND)
 	set(CPACK_RPM_COMPONENT_INSTALL ON)
 	# use default rpm package naming
 	set(CPACK_RPM_FILE_NAME "RPM-DEFAULT")
+	set(CPACK_RPM_PACKAGE_RELEASE_DIST ON)
 	# configure license and changelog
 	set(CPACK_RPM_PACKAGE_LICENSE "LGPLv2+")
 	set(CPACK_RPM_CHANGELOG_FILE "${CMAKE_CURRENT_SOURCE_DIR}/rpm_changelog.txt")