[PATCH 2/4] convert: Keep foreign $Id$ on checkout.

["Henrik Grubbström" <grubba@grubba.org>]

From: Henrik Grubbström (Grubba) <grubba@grubba.org>

If there are foreign $Id$ keywords in the repository, they are most
likely there for a reason. Let's keep them on checkout (which is also
what the documentation indicates). Foreign $Id$ keywords are now
recognized by there being multiple space separated fields in $Id:xxxxx$.

Signed-off-by: Henrik Grubbström <grubba@grubba.org>
---
 convert.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/convert.c b/convert.c
index 91207ab..28aeea3 100644
--- a/convert.c
+++ b/convert.c
@@ -513,7 +513,10 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 		} else if (src[2] == ':') {
 			/*
 			 * It's possible that an expanded Id has crept its way into the
-			 * repository, we cope with that by stripping the expansion out
+			 * repository, we cope with that by stripping the expansion out.
+			 * This is probably not a good idea, since it will cause changes
+			 * on checkout, which won't go away by stash, but let's keep it
+			 * for git-style ids.
 			 */
 			dollar = memchr(src + 3, '$', len - 3);
 			if (!dollar) {
@@ -527,6 +530,15 @@ static int ident_to_worktree(const char *path, const char *src, size_t len,
 				continue;
 			}
 
+			if ((src[3] != ' ') ||
+			    (memchr(src + 4, ' ', len - 4) != dollar-1)) {
+				/* There are spaces in unexpected places.
+				 * This is probably an id from some other
+				 * versioning system. Keep it for now.
+				 */
+				continue;
+			}
+
 			len -= dollar + 1 - src;
 			src  = dollar + 1;
 		} else {
-- 
1.6.4.122.g6ffd7