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Commit | Line | Data |
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1 | #!/bin/sh | |
2 | # | |
3 | # Copyright (c) 2005 Junio C Hamano | |
4 | # | |
5 | # Resolve two or more trees. | |
6 | # | |
7 | ||
8 | LF=' | |
9 | ' | |
10 | ||
11 | die () { | |
12 | echo >&2 "$*" | |
13 | exit 1 | |
14 | } | |
15 | ||
16 | # The first parameters up to -- are merge bases; the rest are heads. | |
17 | bases= head= remotes= sep_seen= | |
18 | for arg | |
19 | do | |
20 | case ",$sep_seen,$head,$arg," in | |
21 | *,--,) | |
22 | sep_seen=yes | |
23 | ;; | |
24 | ,yes,,*) | |
25 | head=$arg | |
26 | ;; | |
27 | ,yes,*) | |
28 | remotes="$remotes$arg " | |
29 | ;; | |
30 | *) | |
31 | bases="$bases$arg " | |
32 | ;; | |
33 | esac | |
34 | done | |
35 | ||
36 | # Reject if this is not an Octopus -- resolve should be used instead. | |
37 | case "$remotes" in | |
38 | ?*' '?*) | |
39 | ;; | |
40 | *) | |
41 | exit 2 ;; | |
42 | esac | |
43 | ||
44 | # MRC is the current "merge reference commit" | |
45 | # MRT is the current "merge result tree" | |
46 | ||
47 | MRC=$(git rev-parse --verify -q $head) | |
48 | MRT=$(git write-tree) | |
49 | NON_FF_MERGE=0 | |
50 | OCTOPUS_FAILURE=0 | |
51 | for SHA1 in $remotes | |
52 | do | |
53 | case "$OCTOPUS_FAILURE" in | |
54 | 1) | |
55 | # We allow only last one to have a hand-resolvable | |
56 | # conflicts. Last round failed and we still had | |
57 | # a head to merge. | |
58 | echo "Automated merge did not work." | |
59 | echo "Should not be doing an Octopus." | |
60 | exit 2 | |
61 | esac | |
62 | ||
63 | eval pretty_name=\${GITHEAD_$SHA1:-$SHA1} | |
64 | if test "$SHA1" = "$pretty_name" | |
65 | then | |
66 | SHA1_UP="$(echo "$SHA1" | tr a-z A-Z)" | |
67 | eval pretty_name=\${GITHEAD_$SHA1_UP:-$pretty_name} | |
68 | fi | |
69 | common=$(git merge-base --all $SHA1 $MRC) || | |
70 | die "Unable to find common commit with $pretty_name" | |
71 | ||
72 | case "$LF$common$LF" in | |
73 | *"$LF$SHA1$LF"*) | |
74 | echo "Already up-to-date with $pretty_name" | |
75 | continue | |
76 | ;; | |
77 | esac | |
78 | ||
79 | if test "$common,$NON_FF_MERGE" = "$MRC,0" | |
80 | then | |
81 | # The first head being merged was a fast-forward. | |
82 | # Advance MRC to the head being merged, and use that | |
83 | # tree as the intermediate result of the merge. | |
84 | # We still need to count this as part of the parent set. | |
85 | ||
86 | echo "Fast-forwarding to: $pretty_name" | |
87 | git read-tree -u -m $head $SHA1 || exit | |
88 | MRC=$SHA1 MRT=$(git write-tree) | |
89 | continue | |
90 | fi | |
91 | ||
92 | NON_FF_MERGE=1 | |
93 | ||
94 | echo "Trying simple merge with $pretty_name" | |
95 | git read-tree -u -m --aggressive $common $MRT $SHA1 || exit 2 | |
96 | next=$(git write-tree 2>/dev/null) | |
97 | if test $? -ne 0 | |
98 | then | |
99 | echo "Simple merge did not work, trying automatic merge." | |
100 | git-merge-index -o git-merge-one-file -a || | |
101 | OCTOPUS_FAILURE=1 | |
102 | next=$(git write-tree 2>/dev/null) | |
103 | fi | |
104 | ||
105 | MRC="$MRC $SHA1" | |
106 | MRT=$next | |
107 | done | |
108 | ||
109 | exit "$OCTOPUS_FAILURE" |