-#!/bin/sh
-# Copyright (C) 2005 Junio C Hamano
-#
-# Applying diff between two trees to the work tree can be
-# done with the following single command:
-#
-# GIT_EXTERNAL_DIFF=git-apply-patch-script git-diff-tree -p $tree1 $tree2
-#
-
-case "$#" in
-1)
- echo >&2 "cannot handle unmerged diff on path $1."
- exit 1 ;;
-8 | 9)
- echo >&2 "cannot handle rename diff between $1 and $8 yet."
- exit 1 ;;
-esac
-name="$1" tmp1="$2" hex1="$3" mode1="$4" tmp2="$5" hex2="$6" mode2="$7"
-
-type1=f
-case "$mode1" in
-*120???) type1=l ;;
-*1007??) mode1=+x ;;
-*1006??) mode1=-x ;;
-.) type1=- ;;
-esac
-
-type2=f
-case "$mode2" in
-*120???) type2=l ;;
-*1007??) mode2=+x ;;
-*1006??) mode2=-x ;;
-.) type2=- ;;
-esac
-
-case "$type1,$type2" in
-
--,?)
- dir=$(dirname "$name")
- case "$dir" in '' | .) ;; *) mkdir -p "$dir" ;; esac || {
- echo >&2 "cannot create leading path for $name."
- exit 1
- }
- if test -e "$name"
- then
- echo >&2 "path $name to be created already exists."
- exit 1
- fi
- case "$type2" in
- f)
- # creating a regular file
- cat "$tmp2" >"$name" || {
- echo >&2 "cannot create a regular file $name."
- exit 1
- }
- case "$mode2" in
- +x)
- echo >&2 "created a regular file $name with mode +x."
- chmod "$mode2" "$name"
- ;;
- -x)
- echo >&2 "created a regular file $name."
- ;;
- esac
- ;;
- l)
- # creating a symlink
- ln -s "$(cat "$tmp2")" "$name" || {
- echo >&2 "cannot create a symbolic link $name."
- exit 1
- }
- echo >&2 "created a symbolic link $name."
- ;;
- *)
- echo >&2 "do not know how to create $name of type $type2."
- exit 1
- esac
- git-update-cache --add -- "$name" ;;
-
-?,-)
- rm -f "$name" || {
- echo >&2 "cannot remove $name"
- exit 1
- }
- echo >&2 "deleted $name."
- git-update-cache --remove -- "$name" ;;
-
-l,f|f,l)
- echo >&2 "cannot change a regular file $name and a symbolic link $name."
- exit 1 ;;
-
-l,l)
- # symlink to symlink
- current=$(readlink "$name") || {
- echo >&2 "cannot read the target of the symbolic link $name."
- exit 1
- }
- original=$(cat "$tmp1")
- next=$(cat "$tmp2")
- test "$original" != "$current" || {
- echo >&2 "cannot apply symbolic link target change ($original->$next) to $name which points to $current."
- exit 1
- }
- if test "$next" != "$current"
- then
- rm -f "$name" && ln -s "$next" "$name" || {
- echo >&2 "cannot create symbolic link $name."
- exit 1
- }
- echo >&2 "changed symbolic target of $name."
- git-update-cache -- "$name"
- fi ;;
-
-f,f)
- # changed
- test -e "$name" || {
- echo >&2 "regular file $name to be patched does not exist."
- exit 1
- }
- dir=$(dirname "$name")
- case "$dir" in '' | .) ;; *) mkdir -p "$dir";; esac || {
- echo >&2 "cannot create leading path for $name."
- exit 1
- }
- tmp=.git-apply-patch-$$
- trap "rm -f $tmp-*" 0 1 2 3 15
-
- # Be careful, in case "$tmp2" is borrowed path from the work tree
- # we are looking at...
- diff -u -L "a/$name" -L "b/$name" "$tmp1" "$tmp2" >$tmp-patch
-
- # This will say "patching ..." so we do not say anything outselves.
- patch -p1 <$tmp-patch || exit
- rm -f $tmp-patch
- case "$mode1,$mode2" in
- "$mode2,$mode1") ;;
- *)
- chmod "$mode2" "$name"
- echo >&2 "changed mode from $mode1 to $mode2."
- ;;
- esac
- git-update-cache -- "$name"
-
-esac