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2276aa6c JH |
1 | #!/bin/sh |
2 | # | |
3 | # Copyright (c) 2005 Linus Torvalds | |
4 | # | |
5 | # Resolve two trees, 'stupid merge'. | |
6 | ||
7 | # The first parameters up to -- are merge bases; the rest are heads. | |
8 | bases= head= remotes= sep_seen= | |
9 | for arg | |
10 | do | |
11 | case ",$sep_seen,$head,$arg," in | |
12 | *,--,) | |
13 | sep_seen=yes | |
14 | ;; | |
15 | ,yes,,*) | |
16 | head=$arg | |
17 | ;; | |
18 | ,yes,*) | |
19 | remotes="$remotes$arg " | |
20 | ;; | |
21 | *) | |
22 | bases="$bases$arg " | |
23 | ;; | |
24 | esac | |
25 | done | |
26 | ||
27 | # Give up if we are given more than two remotes -- not handling octopus. | |
28 | case "$remotes" in | |
29 | ?*' '?*) | |
30 | exit 2 ;; | |
31 | esac | |
32 | ||
33 | # Find an optimum merge base if there are more than one candidates. | |
34 | case "$bases" in | |
35 | ?*' '?*) | |
36 | echo "Trying to find the optimum merge base." | |
37 | G=.tmp-index$$ | |
38 | best= | |
39 | best_cnt=-1 | |
40 | for c in $bases | |
41 | do | |
42 | rm -f $G | |
43 | GIT_INDEX_FILE=$G git-read-tree -m $c $head $remotes \ | |
44 | 2>/dev/null || continue | |
45 | # Count the paths that are unmerged. | |
46 | cnt=`GIT_INDEX_FILE=$G git-ls-files --unmerged | wc -l` | |
47 | if test $best_cnt -le 0 -o $cnt -le $best_cnt | |
48 | then | |
49 | best=$c | |
50 | best_cnt=$cnt | |
51 | if test "$best_cnt" -eq 0 | |
52 | then | |
53 | # Cannot do any better than all trivial merge. | |
54 | break | |
55 | fi | |
56 | fi | |
57 | done | |
58 | rm -f $G | |
59 | common="$best" | |
60 | ;; | |
61 | *) | |
62 | common="$bases" | |
63 | ;; | |
64 | esac | |
65 | ||
66 | git-update-index --refresh 2>/dev/null | |
67 | git-read-tree -u -m $common $head $remotes || exit 2 | |
68 | echo "Trying simple merge." | |
69 | if result_tree=$(git-write-tree 2>/dev/null) | |
70 | then | |
71 | exit 0 | |
72 | else | |
73 | echo "Simple merge failed, trying Automatic merge." | |
74 | if git-merge-index -o git-merge-one-file -a | |
75 | then | |
76 | exit 0 | |
77 | else | |
78 | exit 1 | |
79 | fi | |
80 | fi |