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