Automate updating weekly version

.github/workflows/updatecli.yaml

@@ -0,0 +1,22 @@
+name: updatecli
+
+on:
+  workflow_dispatch:
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    # Run once a day
+    - cron: '0 0 * * *'
+
+jobs:
+  updatecli:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Apply
+        uses: updatecli/updatecli-action@v1
+        with:
+          flags: "--config updatecli/updatecli.d --values updatecli/values.yaml"
+        env:
+          UPDATECLI_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

sample-plugin/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <changelist>999999-SNAPSHOT</changelist>
         <bom>weekly</bom>
-        <jenkins.version>2.317</jenkins.version>
+        <jenkins.version>2.316</jenkins.version>
         <java.level>8</java.level>
     </properties>
     <repositories>

updatecli/updatecli.d/weekly-apply.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+set -eux -o pipefail
+
+# Script "weekly-apply.sh"
+# The script checks the current weekly version in the sample plugin
+# - if different than $1 and DRY_RUN is set to:
+#   - "false" then it updates it with the value of $1
+#   - "true" then it only reports the value of $1
+# - otherwise it exits without any value reported
+existing_version=$(mvn help:evaluate -f sample-plugin -Dexpression=jenkins.version -q -DforceStdout)
+
+if test "$1" == "$(echo "${existing_version}")"
+then
+  ## No change
+  # early return with no output
+  exit 0
+else
+  if test "$DRY_RUN" == "false"
+  then
+    ## Value changed to $1" - NO dry run
+    mvn versions:set-property -DgenerateBackupPoms=false -Dproperty=jenkins.version -DnewVersion="$1"
+  fi
+  # Report on stdout
+  echo "$1"
+  exit 0
+fi

updatecli/updatecli.d/weekly.yaml

@@ -0,0 +1,19 @@
+sources:
+  newVersion:
+    name: Get Jenkins Version
+    kind: maven
+    spec:
+      owner: "maven"
+      url: "repo.jenkins-ci.org"
+      repository: "releases"
+      groupID: "org.jenkins-ci.main"
+      artifactID: "jenkins-war"
+
+targets:
+  default:
+    name: setWeeklyVersion
+    sourceID: newVersion
+    kind: shell
+    spec:
+      command: bash ./updatecli/updatecli.d/weekly-apply.sh
+

updatecli/values.yaml

@@ -0,0 +1,5 @@
+github:
+  user: "GitHub Actions"
+  email: "41898282+github-actions[bot]@users.noreply.github.com"
+  username: "github-actions"
+  token: "UPDATECLI_GITHUB_TOKEN"