From: "SZEDER Gábor" <szeder@ira.uka.de>
To: git@vger.kernel.org
Cc: "SZEDER Gábor" <szeder@ira.uka.de>
Subject: [PATCH 11/19] bash prompt: use bash builtins to find out current branch
Date: Wed, 9 May 2012 02:44:42 +0200 [thread overview]
Message-ID: <1336524290-30023-12-git-send-email-szeder@ira.uka.de> (raw)
In-Reply-To: <1336524290-30023-1-git-send-email-szeder@ira.uka.de>
__git_ps1() runs the '$(git symbolic-ref HEAD)' command substitution
to find out whether we are on a branch and to find out the name of
that branch. This imposes the overhead of fork()ing a subshell and
fork()+exec()ing a git process.
Since HEAD is a single-line file and the symbolic ref format is quite
simple to recognize and parse, read and parse it using only bash
builtins, thereby sparing all that fork()+exec() overhead.
Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
---
contrib/completion/git-completion.bash | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index dd69e56e..ed372c41 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -293,8 +293,11 @@ __git_ps1 ()
r="|BISECTING"
fi
- b="$(git symbolic-ref HEAD 2>/dev/null)" || {
-
+ local head=""
+ read head 2>/dev/null <"$__git_dir/HEAD" || return
+ # is it a symbolic ref?
+ b="${head#ref: }"
+ if [ "$head" = "$b" ]; then
b="$(
case "${GIT_PS1_DESCRIBE_STYLE-}" in
(contains)
@@ -310,7 +313,7 @@ __git_ps1 ()
b="$(cut -c1-7 "$__git_dir/HEAD" 2>/dev/null)..." ||
return
b="($b)"
- }
+ fi
fi
local w=""
--
1.7.10.1.541.gb1be298
next prev parent reply other threads:[~2012-05-09 0:47 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-09 0:44 [PATCH 00/19] Bash prompt speedup SZEDER Gábor
2012-05-09 0:44 ` [PATCH 01/19] tests: move code to run tests under bash into a helper library SZEDER Gábor
2012-05-09 0:44 ` [PATCH 02/19] tests: add tests for the bash prompt functions in the completion script SZEDER Gábor
2012-05-09 8:07 ` Johannes Sixt
2012-05-09 18:08 ` Junio C Hamano
2012-05-10 6:09 ` Johannes Sixt
2012-05-09 18:36 ` Junio C Hamano
2012-05-09 20:33 ` SZEDER Gábor
2012-05-09 0:44 ` [PATCH 03/19] completion: use __gitdir() in _git_log() SZEDER Gábor
2012-05-09 18:41 ` Junio C Hamano
2012-05-09 19:01 ` SZEDER Gábor
2012-05-09 0:44 ` [PATCH 04/19] completion: respect $GIT_DIR SZEDER Gábor
2012-05-09 8:09 ` Johannes Sixt
2012-05-09 18:54 ` Junio C Hamano
2012-05-09 0:44 ` [PATCH 05/19] bash prompt: don't show the prompt when .git/HEAD is unreadable SZEDER Gábor
2012-05-09 19:32 ` Junio C Hamano
2012-05-09 19:45 ` SZEDER Gábor
2012-05-09 0:44 ` [PATCH 06/19] bash prompt: return early from __git_ps1() when not in a git repository SZEDER Gábor
2012-05-09 0:44 ` [PATCH 07/19] completion: make __gitdir() store repository path in $__git_dir SZEDER Gábor
2012-05-09 19:36 ` Junio C Hamano
2012-05-09 0:44 ` [PATCH 08/19] completion: use $__git_dir instead of $(__gitdir) SZEDER Gábor
2012-05-09 19:43 ` Junio C Hamano
2012-05-09 20:22 ` SZEDER Gábor
2012-05-09 20:56 ` Junio C Hamano
2012-05-09 21:36 ` SZEDER Gábor
2012-05-09 0:44 ` [RFC PATCH 09/19] completion: platform-specific helper function to get physical path SZEDER Gábor
2012-05-09 7:37 ` Johannes Sixt
2012-05-09 0:44 ` [PATCH 10/19] completion: use bash builtins to search for repository SZEDER Gábor
2012-05-09 19:52 ` Junio C Hamano
2012-05-09 22:34 ` SZEDER Gábor
2012-05-09 22:59 ` Junio C Hamano
2012-05-09 0:44 ` SZEDER Gábor [this message]
2012-05-09 20:02 ` [PATCH 11/19] bash prompt: use bash builtins to find out current branch Junio C Hamano
2012-05-09 21:11 ` SZEDER Gábor
2012-05-09 21:25 ` Junio C Hamano
2012-05-09 21:45 ` SZEDER Gábor
2012-05-09 21:50 ` Junio C Hamano
2012-05-09 0:44 ` [PATCH 12/19] bash prompt: use bash builtins to check whether inside git dir SZEDER Gábor
2012-05-09 8:07 ` Johannes Sixt
2012-05-09 20:06 ` Junio C Hamano
2012-05-09 0:44 ` [PATCH 13/19] bash prompt: check whether inside the worktree only when necessary SZEDER Gábor
2012-05-09 0:44 ` [PATCH 14/19] bash prompt: use bash builtins to find out current branch during rebase SZEDER Gábor
2012-05-09 0:44 ` [PATCH 15/19] bash prompt: use bash builtins to get detached HEAD abbrev. object name SZEDER Gábor
2012-05-09 0:44 ` [PATCH 16/19] bash prompt: display stash and upstream state even inside the repository SZEDER Gábor
2012-05-09 0:44 ` [PATCH 17/19] bash prompt: use bash builtins to check stash state SZEDER Gábor
2012-05-09 0:44 ` [RFC PATCH 18/19] bash prompt: avoid command substitution when checking for untracked files SZEDER Gábor
2012-05-09 20:32 ` Junio C Hamano
2012-05-09 0:44 ` [PATCH 19/19] bash prompt: alternative git prompt without command substitution SZEDER Gábor
2012-05-09 19:38 ` Andrew Sayers
2012-05-09 22:08 ` SZEDER Gábor
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