Run prepareRelease workflow manually and set 'previous-release.baseline'

.github/workflows/prepareRelease.yml

@@ -1,15 +1,23 @@
 name: Prepare Next Release
 on:
-  milestone:
-    types: [created]
+  workflow_dispatch:
+    inputs:
+      nextReleaseName:
+        description: 'Next release name, e.g.: 2025-03'
+        required: true
+      nextReleaseVersion:
+        description: 'Next release name, e.g.: 4.35'
+        required: true
+      baselineRepository:
+        description: 'Previous release baseline repository, e.g.: 4.34-I-builds/I20241120-1800'
+        required: true
 
 permissions:
   contents: read
 
 jobs:
   prepare:
     runs-on: ubuntu-latest
-    if: contains(github.event.milestone.description, 'Release')
     permissions:
       pull-requests: write
       contents: write
@@ -18,10 +26,6 @@ jobs:
       uses: stCarolas/setup-maven@d6af6abeda15e98926a57b5aa970a96bb37f97d1 # v5
       with:
         maven-version: 3.9.9
-    - id: get-release-name
-      run: |
-        name=$(echo ${{ github.event.milestone.due_on }} | cut -d- -f-2)
-        echo "name=$name" >> $GITHUB_OUTPUT
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         ref: master
@@ -32,15 +36,20 @@ jobs:
         distribution: 'temurin'
         cache: maven
     - name: Update Main Versions
-      run: mvn -U -ntp -f eclipse-platform-parent org.eclipse.tycho:tycho-versions-plugin:set-version -DnewVersion=${{ github.event.milestone.title }}.0-SNAPSHOT -Dmodules=../eclipse.platform.releng.prereqs.sdk
+      run: mvn -U -ntp -f eclipse-platform-parent org.eclipse.tycho:tycho-versions-plugin:set-version -DnewVersion=${{ inputs.nextReleaseVersion }}.0-SNAPSHOT -Dmodules=../eclipse.platform.releng.prereqs.sdk
     - name: Update Release Versions
-      run: mvn -ntp -f eclipse-platform-parent/pom.xml --non-recursive org.eclipse.tycho:tycho-versions-plugin:set-property -Dproperties=releaseVersion,releaseName -DnewReleaseName=${{ steps.get-release-name.outputs.name }} -DnewreleaseVersion=${{ github.event.milestone.title }}
-    - name: Create Pull Request for Release ${{ github.event.milestone.title }}
+      run: >-
+        mvn -ntp -f eclipse-platform-parent/pom.xml --non-recursive org.eclipse.tycho:tycho-versions-plugin:set-property 
+        -Dproperties=releaseVersion,releaseName,previous-release.baseline
+        -DnewReleaseName=${{ inputs.nextReleaseName }}
+        -DnewReleaseVersion=${{ inputs.nextReleaseVersion }}
+        '-DnewPrevious-release.baseline=https://download.eclipse.org/eclipse/updates/${{ inputs.baselineRepository }}'
+    - name: Create Pull Request for Release ${{ inputs.nextReleaseVersion }}
       uses: peter-evans/create-pull-request@5e914681df9dc83aa4e4905692ca88beb2f9e91f # v7.0.5
       with:
-        commit-message: Prepare Release ${{ github.event.milestone.title }}
-        branch: prepare_R${{ github.event.milestone.title }}
-        title: Prepare Release ${{ github.event.milestone.title }}
+        commit-message: Prepare Release ${{ inputs.nextReleaseVersion }}
+        branch: prepare_R${{ inputs.nextReleaseVersion }}
+        title: Prepare Release ${{ inputs.nextReleaseVersion }}
         body: A new Release Milstone was created, please review the changes and merge if appropriate.
         delete-branch: true
         milestone: ${{ github.event.milestone.number }}

Jenkinsfile

@@ -23,7 +23,6 @@ pipeline {
 				anyOf {
 					branch 'master'
 					branch 'R*_maintenance'
-					branch 'prepare_R*'
 				}
 			}
 			steps {

RELEASE.md

@@ -194,8 +194,12 @@ The release is scheduled for 10AM EST. Typically the jobs are scheduled beforeha
 #### **Create new Stream Repos:**
   - Run the [Create New Stream Repos](https://ci.eclipse.org/releng/job/Releng/job/newStreamRepos/) job to make an I-builds repo for the next release.
 
+#### **Prepare:**
+  - Run the [prepareRelease](https://github.com/eclipse-platform/eclipse.platform.releng.aggregator/actions/workflows/prepareRelease.yml) GH workflow to create a PR
+  to preapre eclipse-platform-parent/pom.xml for for the next release.
+
 #### **Create Git Milestones for the next Release:**
-  - Milestones in git are created by running the create-milestones job in jenkins, usually after RC1 or RC2. Only specific users can access this job for security reasons. If milestones need to be created and have not please contact @sdawley @sravanlakkimsetti or @laeubi to run it.
+  - Milestones in git are created by running the `create-milestones` job in jenkins, usually after RC1 or RC2. Only specific users can access this job for security reasons. If milestones need to be created and have not please contact @sdawley @sravanlakkimsetti or @laeubi to run it.
 
 #### **Version Updates:**
   - Once the milestones are created (see above) the [Prepare Next Release](https://github.com/eclipse-platform/eclipse.platform.releng.aggregator/actions/workflows/prepareRelease.yml) workflow will run, which will update pom and product versions for the Eclipse repositories and submit pull requests for the changes.