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Commit | Line | Data |
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67cc5c4e LT |
1 | #!/bin/sh |
2 | # | |
8ac069ac JH |
3 | # Copyright (c) 2005 Linus Torvalds |
4 | # | |
67cc5c4e LT |
5 | # Resolve two trees. |
6 | # | |
b33e9666 | 7 | |
806f36d4 FK |
8 | USAGE='<head> <remote> <merge-message>' |
9 | . git-sh-setup | |
67cc5c4e | 10 | |
c591412c | 11 | dropheads() { |
6b38a402 | 12 | rm -f -- "$GIT_DIR/MERGE_HEAD" \ |
c591412c DH |
13 | "$GIT_DIR/LAST_MERGE" || exit 1 |
14 | } | |
67cc5c4e | 15 | |
165e160e JH |
16 | head=$(git-rev-parse --verify "$1"^0) && |
17 | merge=$(git-rev-parse --verify "$2"^0) && | |
5a6852fe | 18 | merge_name="$2" && |
165e160e JH |
19 | merge_msg="$3" || usage |
20 | ||
67cc5c4e LT |
21 | # |
22 | # The remote name is just used for the message, | |
23 | # but we do want it. | |
24 | # | |
3ba513c3 | 25 | if [ -z "$head" -o -z "$merge" -o -z "$merge_msg" ]; then |
165e160e | 26 | usage |
67cc5c4e LT |
27 | fi |
28 | ||
c591412c DH |
29 | dropheads |
30 | echo $head > "$GIT_DIR"/ORIG_HEAD | |
31 | echo $merge > "$GIT_DIR"/LAST_MERGE | |
32 | ||
67cc5c4e LT |
33 | common=$(git-merge-base $head $merge) |
34 | if [ -z "$common" ]; then | |
b33e9666 | 35 | die "Unable to find common commit between" $merge $head |
67cc5c4e LT |
36 | fi |
37 | ||
86b13da4 JH |
38 | case "$common" in |
39 | "$merge") | |
67cc5c4e | 40 | echo "Already up-to-date. Yeeah!" |
c591412c | 41 | dropheads |
67cc5c4e | 42 | exit 0 |
86b13da4 JH |
43 | ;; |
44 | "$head") | |
180b0d74 | 45 | echo "Updating from $head to $merge" |
220a0b52 | 46 | git-read-tree -u -m $head $merge || exit 1 |
5a6852fe SP |
47 | git-update-ref -m "resolve $merge_name: Fast forward" \ |
48 | HEAD "$merge" "$head" | |
6b38a402 | 49 | git-diff-tree -p $head $merge | git-apply --stat |
c591412c | 50 | dropheads |
67cc5c4e | 51 | exit 0 |
86b13da4 JH |
52 | ;; |
53 | esac | |
9585e406 | 54 | |
e3b59a44 JH |
55 | # We are going to make a new commit. |
56 | git var GIT_COMMITTER_IDENT >/dev/null || exit | |
57 | ||
9585e406 JH |
58 | # Find an optimum merge base if there are more than one candidates. |
59 | LF=' | |
60 | ' | |
61 | common=$(git-merge-base -a $head $merge) | |
62 | case "$common" in | |
63 | ?*"$LF"?*) | |
64 | echo "Trying to find the optimum merge base." | |
65 | G=.tmp-index$$ | |
66 | best= | |
67 | best_cnt=-1 | |
68 | for c in $common | |
69 | do | |
70 | rm -f $G | |
71 | GIT_INDEX_FILE=$G git-read-tree -m $c $head $merge \ | |
72 | 2>/dev/null || continue | |
73 | # Count the paths that are unmerged. | |
74 | cnt=`GIT_INDEX_FILE=$G git-ls-files --unmerged | wc -l` | |
75 | if test $best_cnt -le 0 -o $cnt -le $best_cnt | |
76 | then | |
77 | best=$c | |
78 | best_cnt=$cnt | |
79 | if test "$best_cnt" -eq 0 | |
80 | then | |
81 | # Cannot do any better than all trivial merge. | |
82 | break | |
83 | fi | |
84 | fi | |
85 | done | |
86 | rm -f $G | |
87 | common="$best" | |
88 | esac | |
89 | ||
90 | echo "Trying to merge $merge into $head using $common." | |
215a7ad1 | 91 | git-update-index --refresh 2>/dev/null |
220a0b52 | 92 | git-read-tree -u -m $common $head $merge || exit 1 |
67cc5c4e LT |
93 | result_tree=$(git-write-tree 2> /dev/null) |
94 | if [ $? -ne 0 ]; then | |
95 | echo "Simple merge failed, trying Automatic merge" | |
215a7ad1 | 96 | git-merge-index -o git-merge-one-file -a |
e5b905c4 | 97 | if [ $? -ne 0 ]; then |
c591412c | 98 | echo $merge > "$GIT_DIR"/MERGE_HEAD |
b33e9666 | 99 | die "Automatic merge failed, fix up by hand" |
e5b905c4 | 100 | fi |
67cc5c4e LT |
101 | result_tree=$(git-write-tree) || exit 1 |
102 | fi | |
d5a72fd6 | 103 | result_commit=$(echo "$merge_msg" | git-commit-tree $result_tree -p $head -p $merge) |
67cc5c4e | 104 | echo "Committed merge $result_commit" |
5a6852fe SP |
105 | git-update-ref -m "resolve $merge_name: In-index merge" \ |
106 | HEAD "$result_commit" "$head" | |
9c065315 | 107 | git-diff-tree -p $head $result_commit | git-apply --stat |
c591412c | 108 | dropheads |