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#!/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
2) exit 1 ;; # do not feed unmerged diff to me!
esac
name="$1" tmp1="$2" hex1="$3" mode1="$4" tmp2="$5" hex2="$6" mode2="$7"
case "$mode1" in *7??) mode1=+x ;; *6??) mode1=-x ;; esac
case "$mode2" in *7??) mode2=+x ;; *6??) mode2=-x ;; esac
if test -f "$name.orig" || test -f "$name.rej"
then
echo >&2 "Unresolved patch conflicts in the previous run found."
exit 1
fi
case "$mode1,$mode2" in
.,?x)
# newly created
dir=$(dirname "$name")
case "$dir" in '' | .) ;; *) mkdir -p "$dir" esac || {
echo >&2 "cannot create leading path for $name."
exit 1
}
if test -f "$name"
then
echo >&2 "file $name to be created already exists."
exit 1
fi
cat "$tmp2" >"$name" || {
echo >&2 "cannot create $name."
exit 1
}
case "$mode2" in
+x)
echo >&2 "created $name with mode +x."
chmod "$mode2" "$name"
;;
-x)
echo >&2 "created $name."
;;
esac
git-update-cache --add -- "$name"
;;
?x,.)
# deleted
echo >&2 "deleted $name."
rm -f "$name" || {
echo >&2 "cannot remove $name";
exit 1
}
git-update-cache --remove -- "$name"
;;
*)
# changed
dir=$(dirname "$name")
case "$dir" in '' | .) ;; *) mkdir -p "$dir" esac || {
echo >&2 "cannot create leading path for $name."
exit 1
}
# This will say "patching ..." so we do not say anything outselves.
diff -u -L "a/$name" -L "b/$name" "$tmp1" "$tmp2" | patch -p1 || exit
case "$mode1,$mode2" in
"$mode2,$mode1") ;;
*)
echo >&2 "changing mode from $mode1 to $mode2."
chmod "$mode2" "$name"
;;
esac
git-update-cache -- "$name"
esac
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