contrib/git-svn: remove the --no-stop-on-copy flag

Output a big warning if somebody actually has a pre-1.0 version
of svn that doesn't support it.

Thanks to Yann Dirson for reminding me it still existed
and attempting to re-enable it :)

I think I subconciously removed support for it earlier...

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

contrib/git-svn/git-svn.perl

@@ -1019,6 +1019,17 @@ sub svn_compat_check {
 	if (grep /usage: checkout URL\[\@REV\]/,@co_help) {
 		$_svn_co_url_revs = 1;
 	}
+
+	# I really, really hope nobody hits this...
+	unless (grep /stop-on-copy/, (safe_qx(qw(svn log -h)))) {
+		print STDERR <<'';
+W: The installed svn version does not support the --stop-on-copy flag in
+   the log command.
+   Lets hope the directory you're tracking is not a branch or tag
+   and was never moved within the repository...
+
+		$_no_stop_copy = 1;
+	}
 }
 
 # *sigh*, new versions of svn won't honor -r<rev> without URL@<rev>,

contrib/git-svn/git-svn.txt

@@ -162,19 +162,6 @@ COMPATIBILITY OPTIONS
 	Otherwise, do not enable this flag unless you know what you're
 	doing.
 
---no-stop-on-copy::
-	Only used with the 'fetch' command.
-
-	By default, git-svn passes --stop-on-copy to avoid dealing with
-	the copied/renamed branch directory problem entirely.  A
-	copied/renamed branch is the result of a <SVN_URL> being created
-	in the past from a different source.  These are problematic to
-	deal with even when working purely with svn if you work inside
-	subdirectories.
-
-	Do not use this flag unless you know exactly what you're getting
-	yourself into.  You have been warned.
-
 Basic Examples
 ~~~~~~~~~~~~~~