/
git-merge-one-file.sh
executable file
·141 lines (129 loc) · 3.38 KB
/
git-merge-one-file.sh
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
#!/bin/sh
#
# Copyright (c) Linus Torvalds, 2005
#
# This is the git per-file merge script, called with
#
# $1 - original file SHA1 (or empty)
# $2 - file in branch1 SHA1 (or empty)
# $3 - file in branch2 SHA1 (or empty)
# $4 - pathname in repository
# $5 - original file mode (or empty)
# $6 - file in branch1 mode (or empty)
# $7 - file in branch2 mode (or empty)
#
# Handle some trivial cases.. The _really_ trivial cases have
# been handled already by git read-tree, but that one doesn't
# do any merges that might change the tree layout.
case "${1:-.}${2:-.}${3:-.}" in
#
# Deleted in both or deleted in one and unchanged in the other
#
"$1.." | "$1.$1" | "$1$1.")
if [ "$2" ]; then
echo "Removing $4"
else
# read-tree checked that index matches HEAD already,
# so we know we do not have this path tracked.
# there may be an unrelated working tree file here,
# which we should just leave unmolested. Make sure
# we do not have it in the index, though.
exec git update-index --remove -- "$4"
fi
if test -f "$4"; then
rm -f -- "$4" &&
rmdir -p "$(expr "z$4" : 'z\(.*\)/')" 2>/dev/null || :
fi &&
exec git update-index --remove -- "$4"
;;
#
# Added in one.
#
".$2.")
# the other side did not add and we added so there is nothing
# to be done, except making the path merged.
exec git update-index --add --cacheinfo "$6" "$2" "$4"
;;
"..$3")
echo "Adding $4"
if test -f "$4"
then
echo "ERROR: untracked $4 is overwritten by the merge."
exit 1
fi
git update-index --add --cacheinfo "$7" "$3" "$4" &&
exec git checkout-index -u -f -- "$4"
;;
#
# Added in both, identically (check for same permissions).
#
".$3$2")
if [ "$6" != "$7" ]; then
echo "ERROR: File $4 added identically in both branches,"
echo "ERROR: but permissions conflict $6->$7."
exit 1
fi
echo "Adding $4"
git update-index --add --cacheinfo "$6" "$2" "$4" &&
exec git checkout-index -u -f -- "$4"
;;
#
# Modified in both, but differently.
#
"$1$2$3" | ".$2$3")
case ",$6,$7," in
*,120000,*)
echo "ERROR: $4: Not merging symbolic link changes."
exit 1
;;
*,160000,*)
echo "ERROR: $4: Not merging conflicting submodule changes."
exit 1
;;
esac
src2=`git-unpack-file $3`
case "$1" in
'')
echo "Added $4 in both, but differently."
# This extracts OUR file in $orig, and uses git apply to
# remove lines that are unique to ours.
orig=`git-unpack-file $2`
sz0=`wc -c <"$orig"`
diff -u -La/$orig -Lb/$orig $orig $src2 | git apply --no-add
sz1=`wc -c <"$orig"`
# If we do not have enough common material, it is not
# worth trying two-file merge using common subsections.
expr "$sz0" \< "$sz1" \* 2 >/dev/null || : >$orig
;;
*)
echo "Auto-merging $4"
orig=`git-unpack-file $1`
;;
esac
# Be careful for funny filename such as "-L" in "$4", which
# would confuse "merge" greatly.
src1=`git-unpack-file $2`
git merge-file "$src1" "$orig" "$src2"
ret=$?
# Create the working tree file, using "our tree" version from the
# index, and then store the result of the merge.
git checkout-index -f --stage=2 -- "$4" && cat "$src1" >"$4"
rm -f -- "$orig" "$src1" "$src2"
if [ "$6" != "$7" ]; then
echo "ERROR: Permissions conflict: $5->$6,$7."
ret=1
fi
if [ "$1" = '' ]; then
ret=1
fi
if [ $ret -ne 0 ]; then
echo "ERROR: Merge conflict in $4"
exit 1
fi
exec git update-index -- "$4"
;;
*)
echo "ERROR: $4: Not handling case $1 -> $2 -> $3"
;;
esac
exit 1