git-merge-one-file.sh [plain text]
#!/bin/sh
USAGE='<orig blob> <our blob> <their blob> <path>'
USAGE="$USAGE <orig mode> <our mode> <their mode>"
LONG_USAGE="Usage: git merge-one-file $USAGE
Blob ids and modes should be empty for missing files."
SUBDIRECTORY_OK=Yes
. git-sh-setup
cd_to_toplevel
require_work_tree
if ! test "$#" -eq 7
then
echo "$LONG_USAGE"
exit 1
fi
case "${1:-.}${2:-.}${3:-.}" in
"$1.." | "$1.$1" | "$1$1.")
if [ "$2" ]; then
echo "Removing $4"
else
exec git update-index --remove -- "$4"
fi
if test -f "$4"; then
rm -f -- "$4" &&
rmdir -p "$(expr "z$4" : 'z\(.*\)/')" 2>/dev/null || :
fi &&
exec git update-index --remove -- "$4"
;;
".$2.")
exec git update-index --add --cacheinfo "$6" "$2" "$4"
;;
"..$3")
echo "Adding $4"
if test -f "$4"
then
echo "ERROR: untracked $4 is overwritten by the merge."
exit 1
fi
git update-index --add --cacheinfo "$7" "$3" "$4" &&
exec git checkout-index -u -f -- "$4"
;;
".$3$2")
if [ "$6" != "$7" ]; then
echo "ERROR: File $4 added identically in both branches,"
echo "ERROR: but permissions conflict $6->$7."
exit 1
fi
echo "Adding $4"
git update-index --add --cacheinfo "$6" "$2" "$4" &&
exec git checkout-index -u -f -- "$4"
;;
"$1$2$3" | ".$2$3")
case ",$6,$7," in
*,120000,*)
echo "ERROR: $4: Not merging symbolic link changes."
exit 1
;;
*,160000,*)
echo "ERROR: $4: Not merging conflicting submodule changes."
exit 1
;;
esac
src2=`git-unpack-file $3`
case "$1" in
'')
echo "Added $4 in both, but differently."
orig=`git-unpack-file $2`
sz0=`wc -c <"$orig"`
@@DIFF@@ -u -La/$orig -Lb/$orig $orig $src2 | git apply --no-add
sz1=`wc -c <"$orig"`
expr $sz0 \< $sz1 \* 2 >/dev/null || : >$orig
;;
*)
echo "Auto-merging $4"
orig=`git-unpack-file $1`
;;
esac
src1=`git-unpack-file $2`
git merge-file "$src1" "$orig" "$src2"
ret=$?
msg=
if [ $ret -ne 0 ]; then
msg='content conflict'
fi
git checkout-index -f --stage=2 -- "$4" && cat "$src1" >"$4" || exit 1
rm -f -- "$orig" "$src1" "$src2"
if [ "$6" != "$7" ]; then
if [ -n "$msg" ]; then
msg="$msg, "
fi
msg="${msg}permissions conflict: $5->$6,$7"
ret=1
fi
if [ "$1" = '' ]; then
ret=1
fi
if [ $ret -ne 0 ]; then
echo "ERROR: $msg in $4"
exit 1
fi
exec git update-index -- "$4"
;;
*)
echo "ERROR: $4: Not handling case $1 -> $2 -> $3"
;;
esac
exit 1