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1 | #!/bin/sh | |
2 | # | |
3 | # Copyright (c) 2005 Linus Torvalds | |
4 | # Copyright (c) 2005 Junio C Hamano | |
5 | # | |
6 | ||
7 | case "$0" in | |
8 | *-revert* ) | |
9 | test -t 0 && edit=-e | |
10 | me=revert | |
11 | USAGE='[--edit | --no-edit] [-n] <commit-ish>' ;; | |
12 | *-cherry-pick* ) | |
13 | edit= | |
14 | me=cherry-pick | |
15 | USAGE='[--edit] [-n] [-r] <commit-ish>' ;; | |
16 | * ) | |
17 | die "What are you talking about?" ;; | |
18 | esac | |
19 | . git-sh-setup | |
20 | ||
21 | no_commit= replay= | |
22 | while case "$#" in 0) break ;; esac | |
23 | do | |
24 | case "$1" in | |
25 | -n|--n|--no|--no-|--no-c|--no-co|--no-com|--no-comm|\ | |
26 | --no-commi|--no-commit) | |
27 | no_commit=t | |
28 | ;; | |
29 | -e|--e|--ed|--edi|--edit) | |
30 | edit=-e | |
31 | ;; | |
32 | --n|--no|--no-|--no-e|--no-ed|--no-edi|--no-edit) | |
33 | edit= | |
34 | ;; | |
35 | -r|--r|--re|--rep|--repl|--repla|--replay) | |
36 | replay=t | |
37 | ;; | |
38 | -*) | |
39 | usage | |
40 | ;; | |
41 | *) | |
42 | break | |
43 | ;; | |
44 | esac | |
45 | shift | |
46 | done | |
47 | ||
48 | test "$me,$replay" = "revert,t" && usage | |
49 | ||
50 | case "$no_commit" in | |
51 | t) | |
52 | # We do not intend to commit immediately. We just want to | |
53 | # merge the differences in. | |
54 | head=$(git-write-tree) || | |
55 | die "Your index file is unmerged." | |
56 | ;; | |
57 | *) | |
58 | head=$(git-rev-parse --verify HEAD) || | |
59 | die "You do not have a valid HEAD" | |
60 | files=$(git-diff-index --cached --name-only $head) || exit | |
61 | if [ "$files" ]; then | |
62 | die "Dirty index: cannot $me (dirty: $files)" | |
63 | fi | |
64 | ;; | |
65 | esac | |
66 | ||
67 | rev=$(git-rev-parse --verify "$@") && | |
68 | commit=$(git-rev-parse --verify "$rev^0") || | |
69 | die "Not a single commit $@" | |
70 | prev=$(git-rev-parse --verify "$commit^1" 2>/dev/null) || | |
71 | die "Cannot run $me a root commit" | |
72 | git-rev-parse --verify "$commit^2" >/dev/null 2>&1 && | |
73 | die "Cannot run $me a multi-parent commit." | |
74 | ||
75 | # "commit" is an existing commit. We would want to apply | |
76 | # the difference it introduces since its first parent "prev" | |
77 | # on top of the current HEAD if we are cherry-pick. Or the | |
78 | # reverse of it if we are revert. | |
79 | ||
80 | case "$me" in | |
81 | revert) | |
82 | git-rev-list --pretty=oneline --max-count=1 $commit | | |
83 | sed -e ' | |
84 | s/^[^ ]* /Revert "/ | |
85 | s/$/"/' | |
86 | echo | |
87 | echo "This reverts $commit commit." | |
88 | test "$rev" = "$commit" || | |
89 | echo "(original 'git revert' arguments: $@)" | |
90 | base=$commit next=$prev | |
91 | ;; | |
92 | ||
93 | cherry-pick) | |
94 | pick_author_script=' | |
95 | /^author /{ | |
96 | h | |
97 | s/^author \([^<]*\) <[^>]*> .*$/\1/ | |
98 | s/'\''/'\''\'\'\''/g | |
99 | s/.*/GIT_AUTHOR_NAME='\''&'\''/p | |
100 | ||
101 | g | |
102 | s/^author [^<]* <\([^>]*\)> .*$/\1/ | |
103 | s/'\''/'\''\'\'\''/g | |
104 | s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p | |
105 | ||
106 | g | |
107 | s/^author [^<]* <[^>]*> \(.*\)$/\1/ | |
108 | s/'\''/'\''\'\'\''/g | |
109 | s/.*/GIT_AUTHOR_DATE='\''&'\''/p | |
110 | ||
111 | q | |
112 | }' | |
113 | set_author_env=`git-cat-file commit "$commit" | | |
114 | LANG=C LC_ALL=C sed -ne "$pick_author_script"` | |
115 | eval "$set_author_env" | |
116 | export GIT_AUTHOR_NAME | |
117 | export GIT_AUTHOR_EMAIL | |
118 | export GIT_AUTHOR_DATE | |
119 | ||
120 | git-cat-file commit $commit | sed -e '1,/^$/d' | |
121 | case "$replay" in | |
122 | '') | |
123 | echo "(cherry picked from $commit commit)" | |
124 | test "$rev" = "$commit" || | |
125 | echo "(original 'git cherry-pick' arguments: $@)" | |
126 | ;; | |
127 | esac | |
128 | base=$prev next=$commit | |
129 | ;; | |
130 | ||
131 | esac >.msg | |
132 | ||
133 | # This three way merge is an interesting one. We are at | |
134 | # $head, and would want to apply the change between $commit | |
135 | # and $prev on top of us (when reverting), or the change between | |
136 | # $prev and $commit on top of us (when cherry-picking or replaying). | |
137 | ||
138 | echo >&2 "First trying simple merge strategy to $me." | |
139 | git-read-tree -m -u $base $head $next && | |
140 | result=$(git-write-tree 2>/dev/null) || { | |
141 | echo >&2 "Simple $me fails; trying Automatic $me." | |
142 | git-merge-index -o git-merge-one-file -a || { | |
143 | echo >&2 "Automatic $me failed. After fixing it up," | |
144 | echo >&2 "you can use \"git commit -F .msg\"" | |
145 | case "$me" in | |
146 | cherry-pick) | |
147 | echo >&2 "You may choose to use the following when making" | |
148 | echo >&2 "the commit:" | |
149 | echo >&2 "$set_author_env" | |
150 | esac | |
151 | exit 1 | |
152 | } | |
153 | result=$(git-write-tree) || exit | |
154 | } | |
155 | echo >&2 "Finished one $me." | |
156 | ||
157 | # If we are cherry-pick, and if the merge did not result in | |
158 | # hand-editing, we will hit this commit and inherit the original | |
159 | # author date and name. | |
160 | # If we are revert, or if our cherry-pick results in a hand merge, | |
161 | # we had better say that the current user is responsible for that. | |
162 | ||
163 | case "$no_commit" in | |
164 | '') | |
165 | git-commit -n -F .msg $edit | |
166 | rm -f .msg | |
167 | ;; | |
168 | esac |