Commit messages are now scanned for referenced or fixed issue IDs.

Keywords and the status to apply to fixed issues can be defined in Admin -> Settings.

Default keywords:
- for referencing issues: refs, references, IssueID
- for fixing issues: fixes,closes
There's no default status defined for fixed issue. You'll have to specify it if you want to enable auto closure of issues.

Example of a working commit message: "This commit references #1, #2 and fixes #3"

git-svn-id: http://redmine.rubyforge.org/svn/trunk@473 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/changeset.rb

@@ -18,6 +18,7 @@
 class Changeset < ActiveRecord::Base
   belongs_to :repository
   has_many :changes, :dependent => :delete_all
+  has_and_belongs_to_many :issues
   
   validates_presence_of :repository_id, :revision, :committed_on, :commit_date
   validates_numericality_of :revision, :only_integer => true
@@ -27,4 +28,41 @@ class Changeset < ActiveRecord::Base
     self.commit_date = date
     super
   end
+  
+  def after_create
+    scan_comment_for_issue_ids
+  end
+  
+  def scan_comment_for_issue_ids
+    return if comment.blank?
+    # keywords used to reference issues
+    ref_keywords = Setting.commit_ref_keywords.downcase.split(",")
+    # keywords used to fix issues
+    fix_keywords = Setting.commit_fix_keywords.downcase.split(",")
+    # status applied
+    fix_status = IssueStatus.find_by_id(Setting.commit_fix_status_id)
+    
+    kw_regexp = (ref_keywords + fix_keywords).collect{|kw| Regexp.escape(kw.strip)}.join("|")
+    return if kw_regexp.blank?
+    
+    # remove any associated issues
+    self.issues.clear
+    
+    comment.scan(Regexp.new("(#{kw_regexp})[\s:]+(([\s,;&]*#?\\d+)+)", Regexp::IGNORECASE)).each do |match|
+      action = match[0]
+      target_issue_ids = match[1].scan(/\d+/)
+      target_issues = repository.project.issues.find_all_by_id(target_issue_ids)
+      if fix_status && fix_keywords.include?(action.downcase)
+        # update status of issues
+        logger.debug "Issues fixed by changeset #{self.revision}: #{issue_ids.join(', ')}." if logger && logger.debug?
+        target_issues.each do |issue|
+          # don't change the status is the issue is already closed
+          next if issue.status.is_closed?
+          issue.status = fix_status
+          issue.save
+        end
+      end
+      self.issues << target_issues
+    end
+  end
 end