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Commit | Line | Data |
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839a7a06 LT |
1 | #!/bin/sh |
2 | # | |
ec73962d PB |
3 | # Copyright (c) Linus Torvalds, 2005 |
4 | # | |
5 | # This is the git per-file merge script, called with | |
839a7a06 | 6 | # |
e3b4be7f LT |
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 |
82e5a82f | 11 | # $5 - original file mode (or empty) |
ee28152d JH |
12 | # $6 - file in branch1 mode (or empty) |
13 | # $7 - file in branch2 mode (or empty) | |
839a7a06 | 14 | # |
e3b4be7f | 15 | # Handle some trivial cases.. The _really_ trivial cases have |
0fc65a45 | 16 | # been handled already by git-read-tree, but that one doesn't |
ec73962d | 17 | # do any merges that might change the tree layout. |
0a9ea850 | 18 | |
e3b4be7f | 19 | case "${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.") |
cdcb0ed4 LT |
24 | if [ "$2" ]; then |
25 | echo "Removing $4" | |
ed93b449 JH |
26 | else |
27 | # read-tree checked that index matches HEAD already, | |
28 | # so we know we do not have this path tracked. | |
29 | # there may be an unrelated working tree file here, | |
30 | # which we should just leave unmolested. | |
31 | exit 0 | |
cdcb0ed4 | 32 | fi |
0b124bb4 | 33 | if test -f "$4"; then |
397c7669 | 34 | rm -f -- "$4" && |
f327dbce | 35 | rmdir -p "$(expr "z$4" : 'z\(.*\)/')" 2>/dev/null || : |
aacc15ec | 36 | fi && |
215a7ad1 | 37 | exec git-update-index --remove -- "$4" |
ec73962d PB |
38 | ;; |
39 | ||
839a7a06 | 40 | # |
ee28152d | 41 | # Added in one. |
839a7a06 | 42 | # |
ed93b449 JH |
43 | ".$2.") |
44 | # the other side did not add and we added so there is nothing | |
45 | # to be done. | |
46 | ;; | |
47 | "..$3") | |
98a96b00 | 48 | echo "Adding $4" |
ed93b449 JH |
49 | test -f "$4" || { |
50 | echo "ERROR: untracked $4 is overwritten by the merge." | |
51 | exit 1 | |
52 | } | |
215a7ad1 JH |
53 | git-update-index --add --cacheinfo "$6$7" "$2$3" "$4" && |
54 | exec git-checkout-index -u -f -- "$4" | |
ec73962d PB |
55 | ;; |
56 | ||
e2b6a9d0 | 57 | # |
f7d24bbe | 58 | # Added in both, identically (check for same permissions). |
e2b6a9d0 | 59 | # |
ee28152d | 60 | ".$3$2") |
e2b6a9d0 | 61 | if [ "$6" != "$7" ]; then |
ee28152d JH |
62 | echo "ERROR: File $4 added identically in both branches," |
63 | echo "ERROR: but permissions conflict $6->$7." | |
e2b6a9d0 JB |
64 | exit 1 |
65 | fi | |
98a96b00 | 66 | echo "Adding $4" |
215a7ad1 JH |
67 | git-update-index --add --cacheinfo "$6" "$2" "$4" && |
68 | exec git-checkout-index -u -f -- "$4" | |
ec73962d PB |
69 | ;; |
70 | ||
e3b4be7f | 71 | # |
ee28152d | 72 | # Modified in both, but differently. |
e3b4be7f | 73 | # |
f7d24bbe | 74 | "$1$2$3" | ".$2$3") |
54dd99a1 JH |
75 | |
76 | case ",$6,$7," in | |
77 | *,120000,*) | |
78 | echo "ERROR: $4: Not merging symbolic link changes." | |
79 | exit 1 | |
80 | ;; | |
81 | esac | |
82 | ||
cb93c193 | 83 | src2=`git-unpack-file $3` |
f7d24bbe JH |
84 | case "$1" in |
85 | '') | |
86 | echo "Added $4 in both, but differently." | |
cb93c193 JH |
87 | # This extracts OUR file in $orig, and uses git-apply to |
88 | # remove lines that are unique to ours. | |
f7d24bbe | 89 | orig=`git-unpack-file $2` |
fd66dbf5 | 90 | sz0=`wc -c <"$orig"` |
cb93c193 | 91 | diff -u -La/$orig -Lb/$orig $orig $src2 | git-apply --no-add |
fd66dbf5 JH |
92 | sz1=`wc -c <"$orig"` |
93 | ||
94 | # If we do not have enough common material, it is not | |
95 | # worth trying two-file merge using common subsections. | |
96 | expr "$sz0" \< "$sz1" \* 2 >/dev/null || : >$orig | |
f7d24bbe JH |
97 | ;; |
98 | *) | |
31f883d1 | 99 | echo "Auto-merging $4" |
f7d24bbe JH |
100 | orig=`git-unpack-file $1` |
101 | ;; | |
102 | esac | |
ec73962d | 103 | |
b539c5e8 JH |
104 | # Be careful for funny filename such as "-L" in "$4", which |
105 | # would confuse "merge" greatly. | |
106 | src1=`git-unpack-file $2` | |
caba139d | 107 | git-merge-file "$src1" "$orig" "$src2" |
e2b6a9d0 | 108 | ret=$? |
b539c5e8 JH |
109 | |
110 | # Create the working tree file, using "our tree" version from the | |
111 | # index, and then store the result of the merge. | |
112 | git-checkout-index -f --stage=2 -- "$4" && cat "$src1" >"$4" | |
113 | rm -f -- "$orig" "$src1" "$src2" | |
8544a6f1 | 114 | |
e2b6a9d0 | 115 | if [ "$6" != "$7" ]; then |
ec73962d | 116 | echo "ERROR: Permissions conflict: $5->$6,$7." |
2a68a865 | 117 | ret=1 |
e2b6a9d0 | 118 | fi |
f7d24bbe JH |
119 | if [ "$1" = '' ]; then |
120 | ret=1 | |
121 | fi | |
8544a6f1 | 122 | |
e2b6a9d0 | 123 | if [ $ret -ne 0 ]; then |
31f883d1 | 124 | echo "ERROR: Merge conflict in $4" |
0a9ea850 JB |
125 | exit 1 |
126 | fi | |
215a7ad1 | 127 | exec git-update-index -- "$4" |
ec73962d PB |
128 | ;; |
129 | ||
e3b4be7f | 130 | *) |
ec73962d PB |
131 | echo "ERROR: $4: Not handling case $1 -> $2 -> $3" |
132 | ;; | |
e3b4be7f LT |
133 | esac |
134 | exit 1 |