TextBuiltin#init: Factor out a method to get the log output encoding

Change-Id: I87c5774722bd36ea6fe18c4b7ce22342578fa290
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/TextBuiltin.java

@@ -172,29 +172,40 @@ public abstract class TextBuiltin {
 	}
 
 	/**
-	 * Initialize the command to work with a repository.
+	 * Get the log output encoding specified in the repository's
+	 * {@code i18n.logOutputEncoding} configuration.
 	 *
 	 * @param repository
-	 *            the opened repository that the command should work on.
-	 * @param gitDir
-	 *            value of the {@code --git-dir} command line option, if
-	 *            {@code repository} is null.
+	 *            the repository.
+	 * @return Charset corresponding to {@code i18n.logOutputEncoding}, or
+	 *         {@code UTF_8}.
 	 */
-	protected void init(Repository repository, String gitDir) {
-		Charset charset = UTF_8;
+	private Charset getLogOutputEncodingCharset(Repository repository) {
 		if (repository != null) {
 			String logOutputEncoding = repository.getConfig().getString(
-					CONFIG_SECTION_I18N,
-					null,
-					CONFIG_KEY_LOG_OUTPUT_ENCODING);
+					CONFIG_SECTION_I18N, null, CONFIG_KEY_LOG_OUTPUT_ENCODING);
 			if (logOutputEncoding != null) {
 				try {
-					charset = Charset.forName(logOutputEncoding);
+					return Charset.forName(logOutputEncoding);
 				} catch (IllegalArgumentException e) {
 					throw die(CLIText.get().cannotCreateOutputStream);
 				}
 			}
 		}
+		return UTF_8;
+	}
+
+	/**
+	 * Initialize the command to work with a repository.
+	 *
+	 * @param repository
+	 *            the opened repository that the command should work on.
+	 * @param gitDir
+	 *            value of the {@code --git-dir} command line option, if
+	 *            {@code repository} is null.
+	 */
+	protected void init(Repository repository, String gitDir) {
+		Charset charset = getLogOutputEncodingCharset(repository);
 
 		if (ins == null)
 			ins = new FileInputStream(FileDescriptor.in);