[PATCHv3 08/16] bash prompt: use bash builtins to find out rebase state
From: SZEDER Gábor <hidden>
Date: 2016-06-15 22:57:54
Subsystem:
the rest · Maintainer:
Linus Torvalds
During an ongoing interactive rebase __git_ps1() finds out the name of the rebased branch, the total number of patches and the number of the current patch by executing a '$(cat .git/rebase-merge/<FILE>)' command substitution for each. That is not quite the most efficient way to read single line single word files, because it imposes the overhead of fork()ing a subshell and fork()+exec()ing 'cat' several times. Use the 'read' bash builtin instead to avoid those overheads. Signed-off-by: SZEDER Gábor <redacted> --- contrib/completion/git-prompt.sh | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index 0563dea8..bc402f56 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh@@ -325,9 +325,9 @@ __git_ps1 () local step="" local total="" if [ -d "$g/rebase-merge" ]; then - b="$(cat "$g/rebase-merge/head-name" 2>/dev/null)" - step=$(cat "$g/rebase-merge/msgnum" 2>/dev/null) - total=$(cat "$g/rebase-merge/end" 2>/dev/null) + read b 2>/dev/null <"$g/rebase-merge/head-name" + read step 2>/dev/null <"$g/rebase-merge/msgnum" + read total 2>/dev/null <"$g/rebase-merge/end" if [ -f "$g/rebase-merge/interactive" ]; then r="|REBASE-i" else
@@ -335,10 +335,10 @@ __git_ps1 () fi else if [ -d "$g/rebase-apply" ]; then - step=$(cat "$g/rebase-apply/next" 2>/dev/null) - total=$(cat "$g/rebase-apply/last" 2>/dev/null) + read step 2>/dev/null <"$g/rebase-apply/next" + read total 2>/dev/null <"$g/rebase-apply/last" if [ -f "$g/rebase-apply/rebasing" ]; then - b="$(cat "$g/rebase-apply/head-name" 2>/dev/null)" + read b 2>/dev/null <"$g/rebase-apply/head-name" r="|REBASE" elif [ -f "$g/rebase-apply/applying" ]; then r="|AM"
--
1.8.3.1.599.g4459181