ci: Resolves #256 - Rebuild systemd metadata nightly

Author: Steve Ramage

.github/workflows/main.yml

@@ -43,6 +43,8 @@ jobs:
             ${{ runner.os }}-gradle-
       - name: Build with Gradle
         run: |
+          mkdir -p ./build
+          ./generate-changelog  > build/CHANGELOG
           ./gradlew composeUp
           ./gradlew test buildPlugin
           ./gradlew --stop

README.md

@@ -65,6 +65,11 @@ License
 
 ## Development Notes
 
+### Commit Format
+
+This has adopted [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) format for commit messages, in theory anyway. 
+The main effect is that certain tags will be excluded from the automatic changelog.
+
 ### System Requirements
 
 Java 17

ci/release.Jenkinsfile

@@ -4,6 +4,14 @@
 
 def buildDate = new Date().format("yyMMdd", TimeZone.getTimeZone('UTC'))
 
+cron_string = ""
+
+// Build nightly on a release branch
+
+if (BRANCH_NAME ==~ /^([0-9][0-9][0-9].x)$/) {
+  cron_string = "H 1 * * *"
+}
+
 def buildPodDefinition(workerPodImage, ciUtilsEnabled, kanikoEnabled) {
   // language=yaml
   yaml = """
@@ -108,6 +116,9 @@ pipeline {
     quietPeriod(1)
     //skipDefaultCheckout()
   }
+  triggers {
+    cron(cron_string)
+  }
   agent none
 
   stages {

generate-changelog

@@ -6,5 +6,5 @@ SYSTEMD_MESSAGE=$(echo "<li><b>[$SYSTEMD_DATE]</b> Update of systemd unit metada
 
 echo "<h3>Changes</h3>"
 echo "<ul>"
-{ git log --format="%H %aE"  | grep -v dependabot | head -n 20 | cut -d ' ' -f 1 | xargs -d "\n" -n 1 git log -n 1 "--pretty=format:<li><b>[%ad]</b> %s</li></br>%n" --date=format:%Y-%m-%d | sed -E "s%#([0-9]+)%\<a href='https://github.com/SJrX/systemdUnitFilePlugin/issues/\1'>#\1</a>%g"; echo $SYSTEMD_MESSAGE; } | sort -r
+{ git log --format="%H %aE"  | grep -v dependabot | head -n 100 | cut -d ' ' -f 1 | xargs -d "\n" -n 1 git log -n 1 "--pretty=format:<li><b>[%ad]</b> %s</li></br>%n" --date=format:%Y-%m-%d 2> /dev/null | grep -v -E "</b> (ci|chore|docs|build|style|refactor|test):" | head -n 20 | sed -E "s%#([0-9]+)%\<a href='https://github.com/SJrX/systemdUnitFilePlugin/issues/\1'>#\1</a>%g"; echo $SYSTEMD_MESSAGE; } | sort -r
 echo "</ul>"