[PATCH] clean up git script
From: Amos Waterland <hidden>
Date: 2016-06-15 22:42:04
Subsystem:
the rest · Maintainer:
Linus Torvalds
Makes git work with a pure POSIX shell (tested with bash --posix and ash). Right now git causes ash to choke on the redundant shift on line two. Reduces the number of system calls git makes just to do a usage statement from 22610 to 1122, and the runtime for same from 349ms to 29ms on my x86 Linux box. Presents a standard usage statement, and pretty prints the available commands in a form that does not scroll off small terminals. Signed-off-by: Amos Waterland <redacted> --- git | 27 +++++++++++++-------------- 1 files changed, 13 insertions(+), 14 deletions(-)
diff --git a/git b/git
--- a/git
+++ b/git@@ -1,19 +1,18 @@ #!/bin/sh + cmd="$1" -shift -if which git-$cmd-script >& /dev/null -then - exec git-$cmd-script "$@" -fi +path=$(dirname $0) -if which git-$cmd >& /dev/null -then - exec git-$cmd "$@" -fi +test -x $path/git-$cmd-script && exec $path/git-$cmd-script "$@" +test -x $path/git-$cmd && exec $path/git-$cmd "$@" -alternatives=($(echo $PATH | tr ':' '\n' | while read i; do ls $i/git-*-script 2> /dev/null; done)) +echo "Usage: git COMMAND [OPTIONS] [TARGET]" +if [ -n "$cmd" ]; then + echo " git command '$cmd' not found: commands are:" +else + echo " git commands are:" +fi -echo Git command "'$cmd'" not found. Try one of -for i in "${alternatives[@]}"; do - echo $i | sed 's:^.*/git-: :' | sed 's:-script$::' -done | sort | uniq +alternatives=$(cd $path && + ls git-*-script | sed -e 's/git-//' -e 's/-script//') +echo $alternatives | fmt | sed 's/^/ /'