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[PATCH] git-merge-one-file-script cleanups from Cogito 

Chain the resolving sequences (e.g. git-cat-file - chmod -
git-update-cache) through &&s so we stop right away in case one of the
command fails, and report the error code to the script caller.

Also add a copyright notice, some blank lines, ;; on a separate line,
and nicer error messages.

Signed-off-by: Petr Baudis <pasky@ucw.cz>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Petr Baudis 2005-06-09 01:38:20 +02:00 committed by Linus Torvalds
parent 17ebe977d7
commit ec73962d8e
1 changed files with 29 additions and 15 deletions
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44
git-merge-one-file-script
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@ -1,6 +1,8 @@
#!/bin/sh
#
# This is the git merge script, called with
# Copyright (c) Linus Torvalds, 2005
#
# This is the git per-file merge script, called with
#
# $1 - original file SHA1 (or empty)
# $2 - file in branch1 SHA1 (or empty)
@ -12,7 +14,7 @@
#
# Handle some trivial cases.. The _really_ trivial cases have
# been handled already by git-read-tree, but that one doesn't
# do any merges that migth change the tree layout.
# do any merges that might change the tree layout.
case "${1:-.}${2:-.}${3:-.}" in
#
@ -21,23 +23,29 @@ case "${1:-.}${2:-.}${3:-.}" in
"$1..")
echo "WARNING: $4 is removed in both branches."
echo "WARNING: This is a potential rename conflict."
exec git-update-cache --remove -- "$4" ;;
exec git-update-cache --remove -- "$4"
;;
#
# Deleted in one and unchanged in the other.
#
"$1.." | "$1.$1" | "$1$1.")
"$1.$1" | "$1$1.")
echo "Removing $4"
rm -f -- "$4"
exec git-update-cache --remove -- "$4" ;;
exec rm -f -- "$4" &&
git-update-cache --remove -- "$4"
;;
#
# Added in one.
#
".$2." | "..$3" )
case "$6$7" in *7??) mode=+x;; *) mode=-x;; esac
echo "Adding $4 with perm $mode."
git-cat-file blob "$2$3" > "$4"
chmod $mode -- "$4"
exec git-update-cache --add -- "$4" ;;
exec git-cat-file blob "$2$3" >"$4" &&
chmod $mode -- "$4" &&
git-update-cache --add -- "$4"
;;
#
# Added in both (check for same permissions).
#
@ -49,9 +57,11 @@ case "${1:-.}${2:-.}${3:-.}" in
fi
case "$6" in *7??) mode=+x;; *) mode=-x;; esac
echo "Adding $4 with perm $mode"
git-cat-file blob "$2" > "$4"
chmod $mode -- "$4"
exec git-update-cache --add -- "$4" ;;
exec git-cat-file blob "$2" >"$4" &&
chmod $mode -- "$4" &&
git-update-cache --add -- "$4"
;;
#
# Modified in both, but differently.
#
@ -60,12 +70,13 @@ case "${1:-.}${2:-.}${3:-.}" in
orig=`git-unpack-file $1`
src1=`git-unpack-file $2`
src2=`git-unpack-file $3`
merge -p "$src1" "$orig" "$src2" > "$4"
ret=$?
rm -f -- "$orig" "$src1" "$src2"
if [ "$6" != "$7" ]; then
echo "ERROR: Permissions $5->$6->$7 don't match."
echo "ERROR: Permissions conflict: $5->$6,$7."
ret=1
fi
case "$6" in *7??) mode=+x;; *) mode=-x;; esac
@ -78,8 +89,11 @@ case "${1:-.}${2:-.}${3:-.}" in
echo "ERROR: Merge conflict in $4."
exit 1
fi
exec git-update-cache --add -- "$4" ;;
exec git-update-cache --add -- "$4"
;;
*)
echo "ERROR: Not handling case $4: $1 -> $2 -> $3" ;;
echo "ERROR: $4: Not handling case $1 -> $2 -> $3"
;;
esac
exit 1