development/git
development/git
1
0
Fork 0
mirror of https://github.com/git/git synced 2024-09-12 21:04:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

bash prompt: combine 'git rev-parse' executions in the main code path

Browse source 
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 <szeder@ira.uka.de>
This commit is contained in:
SZEDER Gábor 2013-06-17 22:58:42 +02:00
parent 3a43c4b5bd
commit efaa0c1532
1 changed files with 13 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
contrib/completion/git-prompt.sh
View file

@ -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