[PATCH] cg-object-id: use git-rev-parse(1) for date parsing

[Jonas Fonseca <fonseca@diku.dk>]

Using the --until switch, git-rev-parse(1) will first be given the ID. If it
cannot make sense of the ID fallback to using date(1).

Signed-off-by: Jonas Fonseca <fonseca@diku.dk>

---

 The mixing of date parsing behaviours might be a little questionable,
 but it's good to stay compatible with git.

commit 41447107236a7d23daa6ab0f40a0829935485bc8
tree 27863684c19e7f129304d2a1573c08f974126e2a
parent f0535e9952f1cace89d03649e8238aca69a6df44
author Jonas Fonseca <fonseca@diku.dk> Wed, 07 Dec 2005 22:16:50 +0100
committer Jonas Fonseca <fonseca@antimatter.localdomain> Wed, 07 Dec 2005 22:16:50 +0100

 cg-object-id |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/cg-object-id b/cg-object-id
index ea04dca..baf096e 100755
--- a/cg-object-id
+++ b/cg-object-id
@@ -73,7 +73,14 @@ normalize_id()
 	fi
 
 	if [ "$id" != " " ] && [ ! "$valid" ]; then
-		reqsecs=$(date --date="$id" +'%s' 2>/dev/null)
+		curtime=$(date +'%s' 2>/dev/null)
+		reqsecs=$(git-rev-parse --until="$id"); reqsecs=${reqsecs:10}
+
+		# git-rev-parse(1) will output the current time if the ID
+		# doesn't make sense. Workaround it so date(1) can have a try.
+		if [ "$curtime" -le "$reqsecs" ]; then
+			reqsecs=$(date --date="$id" +'%s' 2>/dev/null)
+		fi
 
 		if [ "$reqsecs" ]; then
 			id=$(git-rev-list --min-age=$reqsecs --max-count=1 HEAD)

-- 
Jonas Fonseca