Teach git push .git/branches shorthand

Although it is uncertain if we would keep .git/branches for
long, the shorthand stored there can be used for pushing if it
is host:path/to/git format, so let's make use of it.  This does
not use git-parse-remote because that script will be rewritten
quite a bit for updated pulling.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-push-script b/git-push-script
index 80e922b..70fa968 100755 (executable)
--- a/git-push-script
+++ b/git-push-script
@@ -1,3 +1,64 @@
 #!/bin/sh
 . git-sh-setup-script || die "Not a git archive"
-git-send-pack "$@"
+
+# Parse out parameters and then stop at remote, so that we can
+# translate it using .git/branches information
+has_all=
+has_force=
+has_exec=
+remote=
+
+while case "$#" in 0) break ;; esac
+do
+       case "$1" in
+       --all)
+               has_all=--all ;;
+       --force)
+               has_force=--force ;;
+       --exec=*)
+               has_exec="$1" ;;
+       -*)
+               die "Unknown parameter $1" ;;
+        *)
+               remote="$1"
+               shift
+               set x "$@"
+               shift
+               break ;;
+       esac
+       shift
+done
+
+case "$remote" in
+*:* | /* | ../* | ./* )
+       # An URL, host:/path/to/git, absolute and relative paths.
+       ;;
+* )
+       # Shorthand
+       if expr "$remote" : '..*/..*' >/dev/null
+       then
+               # a short-hand followed by a trailing path
+               shorthand=$(expr "$remote" : '\([^/]*\)')
+               remainder=$(expr "$remote" : '[^/]*\(/.*\)$')
+       else
+               shorthand="$remote"
+               remainder=
+       fi
+       remote=$(sed -e 's/#.*//' "$GIT_DIR/branches/$remote") &&
+       expr "$remote" : '..*:' >/dev/null &&
+       remote="$remote$remainder" ||
+       die "Cannot parse remote $remote"
+       ;;
+esac
+
+case "$remote" in
+http://* | https://* | git://* | rsync://* )
+       die "Cannot push to $remote" ;;
+esac
+
+set x "$remote" "$@"; shift
+test "$has_all" && set x "$has_all" "$@" && shift
+test "$has_force" && set x "$has_force" "$@" && shift
+test "$has_exec" && set x "$has_exec" "$@" && shift
+
+exec git-send-pack "$@"