There are a couple of '$(git rev-parse --<opt>)' command substitutions
in __git_ps1() and three of them are executed in the main code path:
- the first to get the path to the .git directory ('--git-dir'),
- the second to check whether we're inside the .git directory
('--is-inside-git-dir'),
- and the last, depending on the results of the second, either
* to check whether it's a bare repo ('--is-bare-repository'), or
* to check whether inside a work tree ('--is-inside-work-tree').
Naturally, this imposes the overhead of fork()ing three subshells and
fork()+exec()ing three git commands.
Combine these four 'git rev-parse' queries into a single one and use
bash parameter expansions to parse the combined output, i.e. to
separate the path to the .git directory from the true/false of
'--is-inside-git-dir', etc. This way we can eliminate two of the
three subshells and git commands.
Signed-off-by: SZEDER Gábor <sze...@ira.uka.de>
---
contrib/completion/git-prompt.sh | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index c2050b69..7d226251 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -311,8 +311,9 @@ __git_ps1 ()
;;
esac
- local g="$(git rev-parse --git-dir 2>/dev/null)"
- if [ -z "$g" ]; then
+ local repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
+ --is-bare-repository --is-inside-work-tree 2>/dev/null)"
+ if [ -z "$repo_info" ]; then
if [ $pcmode = yes ]; then
#In PC mode PS1 always needs to be set
PS1="$ps1pc_start$ps1pc_end"
@@ -320,6 +321,13 @@ __git_ps1 ()
return
fi
+ local inside_worktree="${repo_info##*$'\n'}"
+ repo_info="${repo_info%$'\n'*}"
+ local bare_repo="${repo_info##*$'\n'}"
+ repo_info="${repo_info%$'\n'*}"
+ local inside_gitdir="${repo_info##*$'\n'}"
+ local g="${repo_info%$'\n'*}"
+
local r=""
local b=""
local step=""
@@ -402,13 +410,13 @@ __git_ps1 ()
local c=""
local p=""
- if [ "true" = "$(git rev-parse --is-inside-git-dir 2>/dev/null)" ]; then
- if [ "true" = "$(git rev-parse --is-bare-repository
2>/dev/null)" ]; then
+ if [ "true" = "$inside_gitdir" ]; then
+ if [ "true" = "$bare_repo" ]; then
c="BARE:"
else
b="GIT_DIR!"
fi
- elif [ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ];
then
+ elif [ "true" = "$inside_worktree" ]; then
if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
[ "$(git config --bool bash.showDirtyState)" != "false" ]
then
--
1.8.3.1.599.g4459181
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