Polish "Automate Docker update in CI"

See gh-20530

ci/pipeline.yml

@@ -189,7 +189,6 @@ jobs:
 - name: detect-docker-updates
   plan:
   - get: git-repo
-    resource: git-repo-ci-docker
   - get: every-wednesday
     trigger: true
   - get: spring-boot-ci-image
@@ -199,13 +198,11 @@ jobs:
       params:
         GITHUB_REPO: spring-boot
         GITHUB_ORGANIZATION: spring-projects
-        GITHUB_PASSWORD: ((github-password))
-        GITHUB_USERNAME: ((github-username))
         ISSUE_TITLE: ((docker-upgrade-issue-title))
       image: spring-boot-ci-image
     - put: git-repo-ci-docker
       params:
-        repository: docker-updates-git-repo
+        repository: git-repo-updated
         force: true
     - task: create-pull-request
       file: git-repo/ci/tasks/create-pull-request.yml

ci/scripts/create-pull-request.sh

@@ -1,7 +1,10 @@
 #!/bin/bash
 set -e
 
-curl \
+commit_message=$( cat commit-details/message )
+
+if [[ ${commit_message} != "" ]]; then
+	curl \
 	  -s \
 		-u ${GITHUB_USERNAME}:${GITHUB_PASSWORD} \
 		-H "Content-type:application/json" \
@@ -9,3 +12,6 @@ curl \
 		-f \
 		-X \
 		POST "https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/pulls" > /dev/null || { echo "Failed to create pull request" >&2; exit 1; }
+else
+	echo "Already up-to-date"
+fi

ci/scripts/detect-docker-updates.sh

@@ -18,20 +18,17 @@ fi
 existing_tasks=$( curl -s https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/pulls\?labels\=type:%20task\&state\=open\&creator\=spring-buildmaster )
 existing_upgrade_issues=$( echo "$existing_tasks" | jq -c --arg TITLE "$ISSUE_TITLE" '.[] | select(.title==$TITLE)' )
 
+git clone git-repo git-repo-updated > /dev/null
+
 if [[ ${existing_upgrade_issues} = "" ]]; then
-	pushd git-repo > /dev/null
-	popd > /dev/null
-	git clone git-repo docker-updates-git-repo > /dev/null
-	pushd docker-updates-git-repo > /dev/null
-	# Create changes in dedicated branch
-	branch="ci-docker-$latest_version"
+	pushd git-repo-updated > /dev/null
 	git config user.name "Spring Buildmaster" > /dev/null
 	git config user.email "buildmaster@springframework.org" > /dev/null
-	git checkout -b "$branch" origin/master > /dev/null
 	sed -i "s/version=.*/version=\"$latest_version\"/" ci/images/get-docker-url.sh
 	git add ci/images/get-docker-url.sh > /dev/null
 	commit_message="Upgrade to Docker $latest_version in CI"
 	git commit -m "$commit_message" > /dev/null
+	echo ${commit_message} > commit-details/message
 else
 	echo "Pull request already exists."
 fi

ci/tasks/create-pull-request.yml

@@ -2,6 +2,7 @@
 platform: linux
 inputs:
   - name: git-repo
+  - name: commit-details
 params:
   BASE_BRANCH:
   BRANCH:

ci/tasks/detect-docker-updates.yml

@@ -3,12 +3,11 @@ platform: linux
 inputs:
   - name: git-repo
 outputs:
-  - name: docker-updates-git-repo
+  - name: git-repo-updated
+  - name: commit-details
 params:
   GITHUB_REPO:
   GITHUB_ORGANIZATION:
-  GITHUB_PASSWORD:
-  GITHUB_USERNAME:
   ISSUE_TITLE:
 run:
   path: git-repo/ci/scripts/detect-docker-updates.sh