Create issue for each forward merge found in commit message

Closes gh-25586

Author: wilkinsona

git/hooks/forward-merge

@@ -17,24 +17,25 @@ class ForwardMerge
   end
 end
 
-def find_forward_merge(message_file)
+def find_forward_merges(message_file)
   $log.debug "Searching for for forward merge"
   rev=`git rev-parse -q --verify MERGE_HEAD`.strip
   $log.debug "Found #{rev} from git rev-parse"
   return nil unless rev
   message = File.read(message_file)
+  forward_merges = []
   message.each_line do |line|
     $log.debug "Checking #{line} for message"
     match = /^(?:Fixes|Closes) gh-(\d+) in (\d\.\d\.[\dx](?:[\.\-](?:M|RC)\d)?)$/.match(line)
     if match then
       issue = match[1]
       milestone = match[2]
       $log.debug "Matched reference to issue #{issue} in milestone #{milestone}"
-      return ForwardMerge.new(issue, milestone, message, line)
+      forward_merges << ForwardMerge.new(issue, milestone, message, line)
     end
   end
-  $log.debug "No match in merge message"
-  return nil
+  $log.debug "No match in merge message" unless forward_merges
+  return forward_merges
 end
 
 def get_issue(username, password, repository, number)
@@ -108,8 +109,8 @@ end
 $log.debug "Running forward-merge hook script"
 message_file=ARGV[0]
 
-forward_merge = find_forward_merge(message_file)
-exit 0 unless forward_merge
+forward_merges = find_forward_merges(message_file)
+exit 0 unless forward_merges
 
 $log.debug "Loading config from ~/.spring-boot/forward_merge.yml"
 config = YAML.load_file(File.join(Dir.home, '.spring-boot', 'forward-merge.yml'))
@@ -118,15 +119,17 @@ password = config['github']['credentials']['password']
 dry_run = config['dry_run']
 repository = 'spring-projects/spring-boot'
 
-existing_issue = get_issue(username, password, repository, forward_merge.issue)
-title = existing_issue['title']
-labels = existing_issue['labels'].map { |label| label['name'] }
-labels << "status: forward-port"
-$log.debug "Processing issue '#{title}'"
+forward_merges.each do |forward_merge|
+  existing_issue = get_issue(username, password, repository, forward_merge.issue)
+  title = existing_issue['title']
+  labels = existing_issue['labels'].map { |label| label['name'] }
+  labels << "status: forward-port"
+  $log.debug "Processing issue '#{title}'"
 
-milestone = find_milestone(username, password, repository, forward_merge.milestone)
-new_issue_number = create_issue(username, password, repository, forward_merge.issue, title, labels, milestone, forward_merge.milestone, dry_run)
+  milestone = find_milestone(username, password, repository, forward_merge.milestone)
+  new_issue_number = create_issue(username, password, repository, forward_merge.issue, title, labels, milestone, forward_merge.milestone, dry_run)
 
-puts "Created gh-#{new_issue_number} for forward port of gh-#{forward_merge.issue} into #{forward_merge.milestone}"
-rewritten_message = forward_merge.message.sub(forward_merge.line, "Closes gh-#{new_issue_number}\n")
-File.write(message_file, rewritten_message)
+  puts "Created gh-#{new_issue_number} for forward port of gh-#{forward_merge.issue} into #{forward_merge.milestone}"
+  rewritten_message = forward_merge.message.sub(forward_merge.line, "Closes gh-#{new_issue_number}\n")
+  File.write(message_file, rewritten_message)
+end