[fixed JENKINS-19740] Added postCheckout for SCMs

core/src/main/java/hudson/model/AbstractBuild.java

@@ -667,6 +667,10 @@ public abstract class AbstractBuild<P extends AbstractProject<P,R>,R extends Abs
                             } catch (Exception e) {
                                 throw new IOException2("Failed to parse changelog",e);
                             }
+
+                        // Get a chance to do something after checkout and changelog is done
+                        scm.postCheckout( build, launcher, build.getWorkspace(), listener );
+
                         return;
                     }
                 } catch (AbortException e) {

core/src/main/java/hudson/scm/SCM.java

@@ -420,6 +420,13 @@ public abstract class SCM implements Describable<SCM>, ExtensionPoint {
      */
     public abstract boolean checkout(AbstractBuild<?,?> build, Launcher launcher, FilePath workspace, BuildListener listener, File changelogFile) throws IOException, InterruptedException;
 
+    /**
+     * Get a chance to do operations after the workspace i checked out and the changelog is written.
+     */
+    public void postCheckout(AbstractBuild<?,?> build, Launcher launcher, FilePath workspace, BuildListener listener) throws IOException, InterruptedException {
+        /* Default implementation is noop */
+    }
+
     /**
      * Adds environmental variables for the builds to the given map.
      *