Fetch scripts from the main branch of the catalog

The jenkinsci/jenkins-scripts repository is switching from `master` as
its default branch to `main`. Update references to the repository to use
this new branch name.

Author: mtughan

CHANGELOG.md

@@ -97,7 +97,7 @@ Release date: _Nov 7, 2012_
     Would like to create/use a central "catalog" . . . 
 -   Scriptler now understands the format for shared scripts also when
     first time pushed via git into Scriptler (Format description:
-    <https://github.com/jenkinsci/jenkins-scripts/tree/master/scriptler#scriptler-scripts>
+    <https://github.com/jenkinsci/jenkins-scripts/tree/main/scriptler#scriptler-scripts>
     )
 -   now depends on the [Git Server
     Plugin](https://wiki.jenkins.io/display/JENKINS/Git+Server+Plugin)

README.md

@@ -7,7 +7,7 @@ Besides administering your scripts, Scriptler also provides a way to
 share scripts between users via hosted script catalogs on the
 internet.  
 On GitHub at
-<https://github.com/jenkinsci/jenkins-scripts/tree/master/scriptler> you
+<https://github.com/jenkinsci/jenkins-scripts/tree/main/scriptler> you
 are not only able to find scripts and import it via scriptler in to your
 Jenkins instance, but can also share your own scripts. Just send a pull
 request to <https://github.com/jenkinsci/jenkins-scripts/> and your

src/main/java/org/jenkinsci/plugins/scriptler/share/gh/CentralScriptJsonCatalog.java

@@ -12,8 +12,8 @@
 import org.jenkinsci.plugins.scriptler.share.ScriptInfo;
 
 /**
- * Gets the GitHub catalog from <a href="http://mirrors.jenkins-ci.org/updates/updates/org.jenkinsci.plugins.scriptler.CentralScriptJsonCatalog.json">jenkins-ci/org.jenkinsci.plugins.scriptler.CentralScriptJsonCatalog.json</a>. This catalog is updated by a background crawler on the
- * Jenkins infrastructure site.
+ * Gets the GitHub catalog from <a href="https://mirrors.updates.jenkins.io/updates/org.jenkinsci.plugins.scriptler.CentralScriptJsonCatalog.json">jenkins.io/org.jenkinsci.plugins.scriptler.CentralScriptJsonCatalog.json</a>.
+ * This catalog is updated by <a href="https://github.com/jenkins-infra/crawler/blob/main/scriptler.groovy">a background crawler on the Jenkins infrastructure site</a>.
  *
  * @author Dominik Bartholdi (imod)
  */

src/main/java/org/jenkinsci/plugins/scriptler/share/gh/GHCatalog.java

@@ -31,8 +31,10 @@ public class GHCatalog implements ScriptInfoCatalog<ScriptInfo> {
 
     private static final Logger LOGGER = Logger.getLogger(GHCatalog.class.getName());
 
-    public static final String REPO_BASE = "https://github.com/jenkinsci/jenkins-scripts/blob/master/scriptler/{1}";
-    public static final String DOWNLOAD_URL = "https://raw.github.com/jenkinsci/jenkins-scripts/master/scriptler/{1}";
+    private static final String REPO = "jenkinsci/jenkins-scripts";
+    private static final String BRANCH = "main";
+    public static final String REPO_BASE = "https://github.com/" + REPO + "/blob/" + BRANCH + "/scriptler/{1}";
+    public static final String DOWNLOAD_URL = "https://raw.github.com/" + REPO + "/" + BRANCH + "/scriptler/{1}";
 
     public static final CatalogInfo CATALOG_INFO = new CatalogInfo("gh", REPO_BASE, REPO_BASE, DOWNLOAD_URL);
 

src/main/java/org/jenkinsci/plugins/scriptler/util/ScriptHelper.java

@@ -186,12 +186,12 @@ public static String runScript(String node, String scriptTxt, @NonNull Collectio
     }
 
     /**
-     * Returns the meta info of a script body, which must follow <a href="https://github.com/jenkinsci/jenkins-scripts/tree/master/scriptler">the convention</a>
+     * Returns the meta info of a script body, which must follow <a href="https://github.com/jenkinsci/jenkins-scripts/tree/main/scriptler">the convention</a>
      *
      * @param fullScriptBody
      *            the script to extract the meta info from
      * @return <code>null</code> if no meta info found
-     * @see <a href="https://github.com/jenkinsci/jenkins-scripts/tree/master/scriptler">...</a>
+     * @see <a href="https://github.com/jenkinsci/jenkins-scripts/tree/main/scriptler">...</a>
      */
     public static ScriptInfo extractScriptInfo(String fullScriptBody) {
         final Matcher matcher = SCRIPT_META_PATTERN.matcher(fullScriptBody);