Andrew's git - gitweb.git/blob - git-merge-one-file-script

   1#!/bin/sh
   2#
   3# Copyright (c) Linus Torvalds, 2005
   4#
   5# This is the git per-file merge script, called with
   6#
   7#   $1 - original file SHA1 (or empty)
   8#   $2 - file in branch1 SHA1 (or empty)
   9#   $3 - file in branch2 SHA1 (or empty)
  10#   $4 - pathname in repository
  11#   $5 - orignal file mode (or empty)
  12#   $6 - file in branch1 mode (or empty)
  13#   $7 - file in branch2 mode (or empty)
  14#
  15# Handle some trivial cases.. The _really_ trivial cases have
  16# been handled already by git-read-tree, but that one doesn't
  17# do any merges that might change the tree layout.
  18
  19case "${1:-.}${2:-.}${3:-.}" in
  20#
  21# Deleted in both or deleted in one and unchanged in the other
  22#
  23"$1.." | "$1.$1" | "$1$1.")
  24        echo "Removing $4"
  25        if test -f "$4"; then
  26                rm -f -- "$4"
  27        fi &&
  28                exec git-update-cache --remove -- "$4"
  29        ;;
  30
  31#
  32# Added in one.
  33#
  34".$2." | "..$3" )
  35        echo "Adding $4"
  36        git-update-cache --add --cacheinfo "$6$7" "$2$3" "$4" &&
  37                exec git-checkout-cache -u -f -- "$4"
  38        ;;
  39
  40#
  41# Added in both (check for same permissions).
  42#
  43".$3$2")
  44        if [ "$6" != "$7" ]; then
  45                echo "ERROR: File $4 added identically in both branches,"
  46                echo "ERROR: but permissions conflict $6->$7."
  47                exit 1
  48        fi
  49        echo "Adding $4"
  50        git-update-cache --add --cacheinfo "$6" "$2" "$4" &&
  51                exec git-checkout-cache -u -f -- "$4"
  52        ;;
  53
  54#
  55# Modified in both, but differently.
  56#
  57"$1$2$3")
  58        echo "Auto-merging $4."
  59        orig=`git-unpack-file $1`
  60        src2=`git-unpack-file $3`
  61
  62        # We reset the index to the first branch, making
  63        # git-diff-file useful
  64        git-update-cache --add --cacheinfo "$6" "$2" "$4"
  65                git-checkout-cache -u -f -- "$4" &&
  66                merge "$4" "$orig" "$src2"
  67        ret=$?
  68        rm -f -- "$orig" "$src2"
  69
  70        if [ "$6" != "$7" ]; then
  71                echo "ERROR: Permissions conflict: $5->$6,$7."
  72                ret=1
  73        fi
  74
  75        if [ $ret -ne 0 ]; then
  76                echo "ERROR: Merge conflict in $4."
  77                exit 1
  78        fi
  79        exec git-update-cache -- "$4"
  80        ;;
  81
  82*)
  83        echo "ERROR: $4: Not handling case $1 -> $2 -> $3"
  84        ;;
  85esac
  86exit 1