[PATCH] mmap error handling
[git/git.git] / git-merge-one-file-script
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839a7a06
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1#!/bin/sh
2#
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3# Copyright (c) Linus Torvalds, 2005
4#
5# This is the git per-file merge script, called with
839a7a06 6#
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7# $1 - original file SHA1 (or empty)
8# $2 - file in branch1 SHA1 (or empty)
9# $3 - file in branch2 SHA1 (or empty)
839a7a06 10# $4 - pathname in repository
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11# $5 - orignal file mode (or empty)
12# $6 - file in branch1 mode (or empty)
13# $7 - file in branch2 mode (or empty)
839a7a06 14#
e3b4be7f 15# Handle some trivial cases.. The _really_ trivial cases have
0fc65a45 16# been handled already by git-read-tree, but that one doesn't
ec73962d 17# do any merges that might change the tree layout.
0a9ea850 18
e3b4be7f 19case "${1:-.}${2:-.}${3:-.}" in
839a7a06 20#
98a96b00 21# Deleted in both or deleted in one and unchanged in the other
839a7a06 22#
98a96b00 23"$1.." | "$1.$1" | "$1$1.")
e2b6a9d0 24 echo "Removing $4"
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25 if test -f "$4"
26 then
27 rm -f -- "$4"
28 fi &&
29 exec git-update-cache --remove -- "$4"
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30 ;;
31
839a7a06 32#
ee28152d 33# Added in one.
839a7a06 34#
e2b6a9d0 35".$2." | "..$3" )
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36 echo "Adding $4"
37 git-update-cache --add --cacheinfo "$6$7" "$2$3" "$4" &&
38 exec git-checkout-cache -u -f -- "$4"
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39 ;;
40
e2b6a9d0 41#
ee28152d 42# Added in both (check for same permissions).
e2b6a9d0 43#
ee28152d 44".$3$2")
e2b6a9d0 45 if [ "$6" != "$7" ]; then
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46 echo "ERROR: File $4 added identically in both branches,"
47 echo "ERROR: but permissions conflict $6->$7."
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48 exit 1
49 fi
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50 echo "Adding $4"
51 git-update-cache --add --cacheinfo "$6" "$2" "$4" &&
52 exec git-checkout-cache -u -f -- "$4"
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53 ;;
54
e3b4be7f 55#
ee28152d 56# Modified in both, but differently.
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57#
58"$1$2$3")
ee28152d 59 echo "Auto-merging $4."
c7d1d4e1 60 orig=`git-unpack-file $1`
c7d1d4e1 61 src2=`git-unpack-file $3`
ec73962d 62
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63 # We reset the index to the first branch, making
64 # git-diff-file useful
65 git-update-cache --add --cacheinfo "$6" "$2" "$4"
66 git-checkout-cache -u -f -- "$4" &&
67 merge "$4" "$orig" "$src2"
e2b6a9d0 68 ret=$?
98a96b00 69 rm -f -- "$orig" "$src2"
8544a6f1 70
e2b6a9d0 71 if [ "$6" != "$7" ]; then
ec73962d 72 echo "ERROR: Permissions conflict: $5->$6,$7."
2a68a865 73 ret=1
e2b6a9d0 74 fi
8544a6f1 75
e2b6a9d0 76 if [ $ret -ne 0 ]; then
2a68a865 77 echo "ERROR: Merge conflict in $4."
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78 exit 1
79 fi
98a96b00 80 exec git-update-cache -- "$4"
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81 ;;
82
e3b4be7f 83*)
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84 echo "ERROR: $4: Not handling case $1 -> $2 -> $3"
85 ;;
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86esac
87exit 1