git-svn: add -l/--local command to "git svn rebase"

This avoids fetching new revisions remotely, and is usefuly
versus plain "git rebase" because the user does not have to
specify which remote head to rebase against.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/git-svn.txt

@@ -104,6 +104,14 @@ accepts.  However '--fetch-all' only fetches from the current
 
 Like 'git-rebase'; this requires that the working tree be clean
 and have no uncommitted changes.
++
+--
+-l;;
+--local;;
+	Do not fetch remotely; only run 'git-rebase' against the
+	last fetched commit from the upstream SVN.
+--
++
 
 'dcommit'::
 	Commit each diff from a specified head directly to the SVN

git-svn.perl

@@ -56,7 +56,7 @@ BEGIN
 	$_message, $_file,
 	$_template, $_shared,
 	$_version, $_fetch_all,
-	$_merge, $_strategy, $_dry_run,
+	$_merge, $_strategy, $_dry_run, $_local,
 	$_prefix, $_no_checkout, $_verbose);
 $Git::SVN::_follow_parent = 1;
 my %remote_opts = ( 'username=s' => \$Git::SVN::Prompt::_username,
@@ -145,6 +145,7 @@ BEGIN
 			{ 'merge|m|M' => \$_merge,
 			  'verbose|v' => \$_verbose,
 			  'strategy|s=s' => \$_strategy,
+			  'local|l' => \$_local,
 			  'fetch-all|all' => \$_fetch_all,
 			  %fc_opts } ],
 	'commit-diff' => [ \&cmd_commit_diff,
@@ -439,7 +440,9 @@ sub cmd_rebase {
 		command_noisy('status');
 		exit 1;
 	}
-	$_fetch_all ? $gs->fetch_all : $gs->fetch;
+	unless ($_local) {
+		$_fetch_all ? $gs->fetch_all : $gs->fetch;
+	}
 	command_noisy(rebase_cmd(), $gs->refname);
 }