Add special changelog/version for unstable builds

.ci/azure-pipelines-package.yml

@@ -20,7 +20,7 @@ jobs:
   - script: 'docker build -f deployment/Dockerfile.$(BuildConfiguration) -t jellyfin-web-$(BuildConfiguration) deployment'
     displayName: 'Build Dockerfile'
 
-  - script: 'docker image ls -a && docker run -v $(pwd)/deployment/dist:/dist -v $(pwd):/jellyfin jellyfin-web-$(BuildConfiguration)'
+  - script: 'docker image ls -a && docker run -v $(pwd)/deployment/dist:/dist -v $(pwd):/jellyfin -e GIT_BRANCH=$(Build.SourceBranch) -e BUILD_ID=$(Build.BuildNumber) jellyfin-web-$(BuildConfiguration)'
     displayName: 'Run Dockerfile'
 
   - task: PublishPipelineArtifact@1

deployment/build.debian

@@ -8,6 +8,21 @@ pushd ${SOURCE_DIR}
 
 cp -a yarn.lock /tmp/yarn.lock
 
+# modify changelog to unstable configuration if IS_UNSTABLE
+if [[ ${GIT_BRANCH} == 'refs/heads/package' ]]; then
+    pushd debian/
+    # get the last PR ID
+    PR_ID=$( git log --grep 'Merge pull request' --oneline --single-worktree --first-parent | head -1 | grep --color=none -Eo '#[0-9]+' | tr -d '#' )
+    cat <<EOF >changelog
+jellyfin-web (${BUILD_ID}-unstable) unstable; urgency=medium
+
+  * Jellyfin unstable build ${BUILD_ID} for merged PR #${PR_ID}
+
+ -- Jellyfin Packaging Team <packaging@jellyfin.org>  $( date --rfc-2822 )
+EOF
+    popd
+fi
+
 # build deb
 dpkg-buildpackage -us -uc --pre-clean --post-clean