X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topgit.git;a=blobdiff_plain;f=tg-summary.sh;fp=tg-summary.sh;h=1c99e2225c61a2a4c9a07ec6bd64ee82558ddda7;hp=612bd27443779266de3385dfce6b2812be81f85a;hb=466ad37954e4735f2f5a38bc47a78d9088b42c00;hpb=f6a3b3964256f3c97793207e801c9c3d854e3b6a

diff --git a/tg-summary.sh b/tg-summary.sh
index 612bd27..1c99e22 100644
--- a/tg-summary.sh
+++ b/tg-summary.sh
@@ -7,13 +7,16 @@ terse=
 graphviz=
 sort=
 deps=
-
+head_from=
 
 ## Parse options
 
 while [ -n "$1" ]; do
 	arg="$1"; shift
 	case "$arg" in
+	-i|-w)
+		[ -z "$head_from" ] || die "-i and -w are mutually exclusive"
+		head_from="$arg";;
 	-t)
 		terse=1;;
 	--graphviz)
@@ -23,7 +26,7 @@ while [ -n "$1" ]; do
 	--deps)
 		deps=1;;
 	*)
-		echo "Usage: tg [...] summary [-t | --sort | --deps | --graphviz]" >&2
+		echo "Usage: tg [...] summary [-t | --sort | --deps | --graphviz] [-i | -w]" >&2
 		exit 1;;
 	esac
 done
@@ -68,8 +71,11 @@ process_branch()
 
 	current=' '
 	[ "$name" != "$curname" ] || current='>'
+	from=$head_from
+	[ "$name" = "$curname" ] ||
+		from=
 	nonempty=' '
-	! branch_empty "$name" || nonempty='0'
+	! branch_empty "$name" $from || nonempty='0'
 	remote=' '
 	[ -z "$base_remote" ] || remote='l'
 	! has_remote "$name" || remote='r'
@@ -88,7 +94,7 @@ process_branch()
 	branch_contains "$name" "refs/top-bases/$name" || base_update='B'
 
 	if [ "$(git rev-parse "$name")" != "$rev" ]; then
-		subject="$(git cat-file blob "$name:.topmsg" | sed -n 's/^Subject: //p')"
+		subject="$(cat_file "$name:.topmsg" $from | sed -n 's/^Subject: //p')"
 	else
 		# No commits yet
 		subject="(No commits)"
@@ -99,7 +105,7 @@ process_branch()
 }
 
 if [ -n "$deps" ]; then
-	list_deps
+	list_deps $head_from
 	exit 0
 fi
 
@@ -113,7 +119,10 @@ git for-each-ref refs/top-bases |
 		if [ -n "$terse" ]; then
 			echo "$name"
 		elif [ -n "$graphviz$sort" ]; then
-			git cat-file blob "$name:.topdeps" | while read dep; do
+			from=$head_from
+			[ "$name" = "$curname" ] ||
+				from=
+			cat_file "$name:.topdeps" $from | while read dep; do
 				dep_is_tgish=true
 				ref_exists "refs/top-bases/$dep"  ||
 					dep_is_tgish=false