Andrew's git - gitweb.git/blob - git-apply-patch-script

   1#!/bin/sh
   2# Copyright (C) 2005 Junio C Hamano
   3#
   4# Applying diff between two trees to the work tree can be
   5# done with the following single command:
   6#
   7# GIT_EXTERNAL_DIFF=git-apply-patch-script git-diff-tree -p $tree1 $tree2
   8#
   9
  10case "$#" in
  111)
  12    echo >&2 "cannot handle unmerged diff on path $1."
  13    exit 1 ;;
  148 | 9)
  15    echo >&2 "cannot handle rename diff between $1 and $8 yet."
  16    exit 1 ;;
  17esac
  18name="$1" tmp1="$2" hex1="$3" mode1="$4" tmp2="$5" hex2="$6" mode2="$7"
  19
  20type1=f
  21case "$mode1" in
  22*120???) type1=l  ;;
  23*1007??) mode1=+x ;;
  24*1006??) mode1=-x ;;
  25.)       type1=-  ;; 
  26esac
  27
  28type2=f
  29case "$mode2" in
  30*120???) type2=l  ;;
  31*1007??) mode2=+x ;;
  32*1006??) mode2=-x ;;
  33.)       type2=-  ;; 
  34esac
  35
  36case "$type1,$type2" in
  37
  38-,?)
  39    dir=$(dirname "$name")
  40    case "$dir" in '' | .) ;; *) mkdir -p "$dir" ;; esac || {
  41        echo >&2 "cannot create leading path for $name."
  42        exit 1
  43    }
  44    if test -e "$name"
  45    then
  46        echo >&2 "path $name to be created already exists."
  47        exit 1
  48    fi
  49    case "$type2" in
  50    f)
  51        # creating a regular file
  52        cat "$tmp2" >"$name" || {
  53            echo >&2 "cannot create a regular file $name."
  54            exit 1
  55        } 
  56        case "$mode2" in
  57        +x)
  58            echo >&2 "created a regular file $name with mode +x."
  59            chmod "$mode2" "$name"
  60            ;;
  61        -x)
  62            echo >&2 "created a regular file $name."
  63            ;;
  64        esac
  65        ;;
  66    l)
  67        # creating a symlink
  68        ln -s "$(cat "$tmp2")" "$name" || {
  69            echo >&2 "cannot create a symbolic link $name."
  70            exit 1
  71        }
  72        echo >&2 "created a symbolic link $name."
  73        ;;
  74    *)
  75        echo >&2 "do not know how to create $name of type $type2."
  76        exit 1
  77    esac
  78    git-update-cache --add -- "$name" ;;
  79
  80?,-)
  81    rm -f "$name" || {
  82        echo >&2 "cannot remove $name"
  83        exit 1
  84    }
  85    echo >&2 "deleted $name."
  86    git-update-cache --remove -- "$name" ;;
  87
  88l,f|f,l)
  89    echo >&2 "cannot change a regular file $name and a symbolic link $name."
  90    exit 1 ;;
  91
  92l,l)
  93    # symlink to symlink
  94    current=$(readlink "$name") || {
  95        echo >&2 "cannot read the target of the symbolic link $name."
  96        exit 1
  97    }
  98    original=$(cat "$tmp1")
  99    next=$(cat "$tmp2")
 100    test "$original" != "$current" || {
 101        echo >&2 "cannot apply symbolic link target change ($original->$next) to $name which points to $current."
 102        exit 1
 103    }
 104    if test "$next" != "$current"
 105    then
 106        rm -f "$name" && ln -s "$next" "$name" || {
 107            echo >&2 "cannot create symbolic link $name."
 108            exit 1
 109        }
 110        echo >&2 "changed symbolic target of $name."
 111        git-update-cache -- "$name"
 112    fi ;;
 113
 114f,f)
 115    # changed
 116    test -e "$name" || {
 117        echo >&2 "regular file $name to be patched does not exist."
 118        exit 1
 119    }
 120    dir=$(dirname "$name")
 121    case "$dir" in '' | .) ;; *) mkdir -p "$dir";; esac || {
 122        echo >&2 "cannot create leading path for $name."
 123        exit 1
 124    }
 125    tmp=.git-apply-patch-$$
 126    trap "rm -f $tmp-*" 0 1 2 3 15
 127
 128    # Be careful, in case "$tmp2" is borrowed path from the work tree
 129    # we are looking at...
 130    diff -u -L "a/$name" -L "b/$name" "$tmp1" "$tmp2" >$tmp-patch
 131
 132    # This will say "patching ..." so we do not say anything outselves.
 133    patch -p1 <$tmp-patch || exit
 134    rm -f $tmp-patch
 135    case "$mode1,$mode2" in
 136    "$mode2,$mode1") ;;
 137    *)
 138        chmod "$mode2" "$name"
 139        echo >&2 "changed mode from $mode1 to $mode2."
 140        ;;
 141    esac
 142    git-update-cache -- "$name"
 143
 144esac