Back to staging

- Use https://download.eclipse.org/staging/2026-03/
- Improve/fix the updater for sending RC2 emails.

Part of #426

Author: merks

releng/org.eclipse.epp.config/org.eclipse.epp.releng.updater/src/org/eclipse/epp/releng/updater/Updater.java

@@ -327,9 +327,16 @@ public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) th
 	}
 
 	private void sendEmail() throws IOException {
+		var folder = "RC2".equals(MILESTONE) ? RELEASE_DIR : MILESTONE;
 		var text = getContents("https://download.eclipse.org/technology/epp/downloads/release/" + SIMREL_VERSION + "/"
-				+ MILESTONE + "/_email.txt");
+				+ folder + "/_email.txt");
 		text = text.replace("https://github.com/eclipse-packaging/packages/labels/endgame", getEndgameIssue());
+		if ("RC2".equals(MILESTONE)) {
+			text = text.replace("Download link:",
+					"Temporary download link: " + "https://download.eclipse.org/technology/epp/downloads/release/"
+							+ SIMREL_VERSION + "/" + RELEASE_DIR + "/\n" + "Final download link: ");
+		}
+
 		openURL("mailto:epp-dev@eclipse.org?subject=" + encode("EPP " + SIMREL_VERSION + " " + MILESTONE) + "&body="
 				+ encode(text));
 	}

releng/org.eclipse.epp.config/parent/pom.xml

@@ -41,7 +41,7 @@
     <!-- Name release directory on download.eclipse.org -->
     <RELEASE_DIR>202603051000</RELEASE_DIR>
     <!-- SimRel Repo to build from -->
-    <SIMREL_REPO>https://download.eclipse.org/releases/2026-03/202603111000/</SIMREL_REPO>
+    <SIMREL_REPO>https://download.eclipse.org/staging/2026-03/</SIMREL_REPO>
     <!-- ID used to generate the filename of the packages -->
     <eclipse.simultaneous.release.id>${RELEASE_NAME}-${RELEASE_MILESTONE}</eclipse.simultaneous.release.id>
     <!-- Timestamp used in various places, e.g. the about dialog (see about.mappings) -->