[JENKINS-17742] - Pick Up Committer from Upstream Job

src/main/java/hudson/plugins/emailext/plugins/recipients/UpstreamComitterRecipientProvider.java

@@ -0,0 +1,79 @@
+package hudson.plugins.emailext.plugins.recipients;
+
+import hudson.EnvVars;
+import hudson.Extension;
+import hudson.model.*;
+import hudson.plugins.emailext.EmailRecipientUtils;
+import hudson.plugins.emailext.ExtendedEmailPublisherContext;
+import hudson.plugins.emailext.ExtendedEmailPublisherDescriptor;
+import hudson.plugins.emailext.plugins.RecipientProvider;
+import hudson.plugins.emailext.plugins.RecipientProviderDescriptor;
+import hudson.scm.ChangeLogSet;
+import hudson.tasks.Mailer;
+import jenkins.model.Jenkins;
+import org.kohsuke.stapler.DataBoundConstructor;
+
+import javax.mail.internet.InternetAddress;
+import java.util.Set;
+
+/**
+ * Sends emails to committers of upstream builds which triggered this build.
+ */
+public class UpstreamComitterRecipientProvider extends RecipientProvider {
+
+    @DataBoundConstructor
+    public UpstreamComitterRecipientProvider() {
+    }
+
+    @Override
+    public void addRecipients(ExtendedEmailPublisherContext context, EnvVars env, Set<InternetAddress> to, Set<InternetAddress> cc, Set<InternetAddress> bcc) {
+        ExtendedEmailPublisherDescriptor descriptor = Jenkins.getInstance().getDescriptorByType(ExtendedEmailPublisherDescriptor.class);
+        descriptor.debug(context.getListener().getLogger(), "Sending email to upstream committer(s).");
+
+        AbstractBuild<?, ?> cur;
+            Cause.UpstreamCause upc = context.getBuild().getCause(Cause.UpstreamCause.class);
+            while (upc != null) {
+                // UpstreamCause.getUpstreamProject() returns the full name, so use getItemByFullName
+                AbstractProject<?, ?> p = (AbstractProject<?, ?>) Jenkins.getInstance().getItemByFullName(upc.getUpstreamProject());
+                if(p == null)
+                    break;
+                cur = p.getBuildByNumber(upc.getUpstreamBuild());
+                upc = cur.getCause(Cause.UpstreamCause.class);
+                addUpstreamCommittersTriggeringBuild(cur, to, cc, bcc, env, context.getListener());
+            }
+    }
+
+    /**
+     * Adds for the given upstream build the committers to the recipient list for each commit in the upstream build.
+     *
+     * @param build the upstream build
+     * @param to the to recipient list
+     * @param cc the cc recipient list
+     * @param bcc the bcc recipient list
+     * @param env
+     * @param listener
+     */
+    private void addUpstreamCommittersTriggeringBuild(AbstractBuild<?, ?> build, Set<InternetAddress> to, Set<InternetAddress> cc, Set<InternetAddress> bcc, EnvVars env, TaskListener listener) {
+        listener.getLogger().println(String.format("Adding upstream committer from job %s with build number %s", build.getProject().getDisplayName(), build.getNumber()));
+        for (ChangeLogSet.Entry change : build.getChangeSet()) {
+            User user = change.getAuthor();
+            String email = user.getProperty(Mailer.UserProperty.class).getAddress();
+            if (email != null) {
+                listener.getLogger().println(String.format("Adding upstream committer %s to recipient list with email %s", user.getFullName(), email));
+                EmailRecipientUtils.addAddressesFromRecipientList(to, cc, bcc, email, env, listener);
+            } else {
+                listener.getLogger().println(String.format("The user %s does not have a configured email email, trying the user's id", user.getFullName()));
+                EmailRecipientUtils.addAddressesFromRecipientList(to, cc, bcc, user.getId(), env, listener);
+            }
+        }
+    }
+
+    @Extension
+    public static final class DescriptorImpl extends RecipientProviderDescriptor {
+
+        @Override
+        public String getDisplayName() {
+            return "Upstream Committer";
+        }
+    }
+}

src/main/resources/hudson/plugins/emailext/plugins/recipients/UpstreamComitterRecipientProvider/help.html

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+<div>
+    Sends email to the list of users who committed changes in upstream builds that triggered this build.
+</div>