#
case "$#" in
-2) exit 1 ;; # do not feed unmerged diff to me!
+1)
+ echo >&2 "cannot handle unmerged diff on path $1."
+ exit 1 ;;
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 "$name.rej"
-then
- echo >&2 "Unresolved patch conflicts in the previous run found."
- exit 1
-fi
+type1=f
+case "$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,$type2" in
-case "$mode1,$mode2" in
-.,?x)
- # newly created
+-,?)
dir=$(dirname "$name")
- case "$dir" in '' | .) ;; *) mkdir -p "$dir" esac || {
+ case "$dir" in '' | .) ;; *) mkdir -p "$dir" ;; esac || {
echo >&2 "cannot create leading path for $name."
exit 1
}
- case "$mode2" in
- +x)
- echo >&2 "created $name with mode +x."
- chmod "$mode2" "$name"
- ;;
- -x)
- echo >&2 "created $name."
+ if test -e "$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"
- ;;
-?x,.)
- # deleted
- echo >&2 "deleted $name."
+ git-update-cache --add -- "$name" ;;
+
+?,-)
rm -f "$name" || {
- echo >&2 "cannot remove $name";
+ echo >&2 "cannot remove $name"
exit 1
}
- git-update-cache --remove -- "$name"
- ;;
-*)
+ 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 "$dir" esac || {
+ case "$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
+ 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") ;;
*)
- echo >&2 "changing mode from $mode1 to $mode2."
chmod "$mode2" "$name"
+ echo >&2 "changed mode from $mode1 to $mode2."
;;
esac
git-update-cache -- "$name"
+
esac