Maintain repository 'description' file.

Make use of the 'description' file in Git repositories which is used by tools
like gitweb or cgit and often by standard hooks. Update the file when changing
the description and initialize the Gitblit description from the file when
Gitblit reads a new, existing repository.

src/main/java/com/gitblit/GitBlit.java

@@ -2021,6 +2021,14 @@ public class GitBlit implements ServletContextListener {
 		boolean hasOrigin = !StringUtils.isEmpty(config.getString("remote", "origin", "url"));
 		
 		if (config != null) {
+			// Initialize description from description file
+			if (getConfig(config,"description", null) == null) {
+				File descFile = new File(r.getDirectory(), "description");
+				if (descFile.exists()) {
+					config.setString(Constants.CONFIG_GITBLIT, null, "description",
+							com.gitblit.utils.FileUtils.readContent(descFile, System.getProperty("line.separator")));
+				}
+			}
 			model.description = getConfig(config, "description", "");
 			model.originRepository = getConfig(config, "originRepository", null);
 			model.addOwners(ArrayUtils.fromString(getConfig(config, "owner", "")));
@@ -2521,6 +2529,15 @@ public class GitBlit implements ServletContextListener {
 		// update settings
 		if (r != null) {
 			updateConfiguration(r, repository);
+			// Update the description file
+			File descFile = new File(r.getDirectory(), "description");
+			if (repository.description != null)
+			{
+				com.gitblit.utils.FileUtils.writeContent(descFile, repository.description);
+			}
+			else if (descFile.exists() && !descFile.isDirectory()) {
+				descFile.delete();
+			}
 			// only update symbolic head if it changes
 			String currentRef = JGitUtils.getHEADRef(r);
 			if (!StringUtils.isEmpty(repository.HEAD) && !repository.HEAD.equals(currentRef)) {