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1 | #!/bin/sh |
2 | . git-sh-setup-script || dir "Not a git archive" | |
3 | ||
4 | usage() { | |
5 | echo >&2 'usage: git bisect [start | bad | good | next | reset] | |
6 | git bisect start reset bisect state and start bisection. | |
7 | git bisect bad [<rev>] mark <rev> a known-bad revision. | |
8 | git bisect good [<rev>...] mark <rev>... known-good revisions. | |
9 | git bisect next find next bisection to test and check it out. | |
10 | git bisect reset [<branch>] finish bisection search and go back to branch.' | |
11 | exit 1 | |
12 | } | |
13 | ||
14 | bisect_autostart() { | |
15 | test -d "$GIT_DIR/refs/bisect" || { | |
16 | echo >&2 'You need to start by "git bisect start"' | |
17 | if test -t 0 | |
18 | then | |
19 | echo >&2 -n 'Do you want me to do it for you [Y/n]? ' | |
20 | read yesno | |
21 | case "$yesno" in | |
22 | [Nn]*) | |
23 | exit ;; | |
24 | esac | |
25 | bisect_start | |
26 | else | |
27 | exit 1 | |
28 | fi | |
29 | } | |
30 | } | |
31 | ||
32 | bisect_start() { | |
33 | case "$#" in 0) ;; *) usage ;; esac | |
34 | # | |
35 | # Verify HEAD. If we were bisecting before this, reset to the | |
36 | # top-of-line master first! | |
37 | # | |
38 | head=$(readlink $GIT_DIR/HEAD) || die "Bad HEAD - I need a symlink" | |
39 | case "$head" in | |
40 | refs/heads/bisect*) | |
41 | git checkout master || exit | |
42 | ;; | |
43 | refs/heads/*) | |
44 | ;; | |
45 | *) | |
46 | die "Bad HEAD - strange symlink" | |
47 | ;; | |
48 | esac | |
49 | ||
50 | # | |
51 | # Get rid of any old bisect state | |
52 | # | |
53 | rm -f "$GIT_DIR/refs/heads/bisect" | |
54 | rm -rf "$GIT_DIR/refs/bisect/" | |
55 | mkdir "$GIT_DIR/refs/bisect" | |
56 | } | |
57 | ||
58 | bisect_bad() { | |
59 | bisect_autostart | |
60 | case "$#" in 0 | 1) ;; *) usage ;; esac | |
61 | rev=$(git-rev-parse --revs-only --verify --default HEAD "$@") || exit | |
62 | echo "$rev" > "$GIT_DIR/refs/bisect/bad" | |
63 | bisect_auto_next | |
64 | } | |
65 | ||
66 | bisect_good() { | |
67 | bisect_autostart | |
68 | case "$#" in | |
69 | 0) revs=$(git-rev-parse --verify HEAD) || exit ;; | |
70 | *) revs=$(git-rev-parse --revs-only "$@") || exit ;; | |
71 | esac | |
72 | for rev in $revs | |
73 | do | |
74 | echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev" | |
75 | done | |
76 | bisect_auto_next | |
77 | } | |
78 | ||
79 | bisect_next_check() { | |
80 | next_ok=no | |
81 | test -f "$GIT_DIR/refs/bisect/bad" && | |
82 | case "$(cd "$GIT_DIR" && echo refs/bisect/good-*)" in | |
83 | refs/bisect/good-\*) ;; | |
84 | *) next_ok=yes ;; | |
85 | esac | |
86 | case "$next_ok,$1" in | |
87 | no,) false ;; | |
88 | no,fail) | |
89 | echo >&2 'You need to give me at least one good and one bad revisions.' | |
90 | exit 1 ;; | |
91 | *) | |
92 | true ;; | |
93 | esac | |
94 | } | |
95 | ||
96 | bisect_auto_next() { | |
97 | bisect_next_check && bisect_next | |
98 | } | |
99 | ||
100 | bisect_next() { | |
101 | case "$#" in 0) ;; *) usage ;; esac | |
102 | bisect_autostart | |
103 | bisect_next_check fail | |
104 | bad=$(git-rev-parse --verify refs/bisect/bad) && | |
105 | good=$(git-rev-parse --sq --revs-only --not \ | |
106 | $(cd "$GIT_DIR" && ls refs/bisect/good-*)) && | |
107 | rev=$(eval "git-rev-list --bisect $good $bad") || exit | |
108 | nr=$(eval "git-rev-list $rev $good" | wc -l) || exit | |
109 | if [ "$nr" -le "1" ]; then | |
110 | echo "$bad is first bad commit" | |
111 | git-diff-tree --pretty $bad | |
112 | exit 0 | |
113 | fi | |
114 | echo "Bisecting: $nr revisions left to test after this" | |
115 | echo "$rev" > "$GIT_DIR/refs/heads/new-bisect" | |
116 | git checkout new-bisect || exit | |
117 | mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" && | |
118 | ln -sf refs/heads/bisect "$GIT_DIR/HEAD" | |
119 | } | |
120 | ||
121 | bisect_reset() { | |
122 | case "$#" in | |
123 | 0) branch=master ;; | |
124 | 1) test -f "$GIT_DIR/refs/heads/$1" || { | |
125 | echo >&2 "$1 does not seem to be a valid branch" | |
126 | exit 1 | |
127 | } | |
128 | branch="$1" ;; | |
129 | *) | |
130 | usage ;; | |
131 | esac | |
132 | git checkout "$branch" && | |
133 | rm -fr "$GIT_DIR/refs/bisect" | |
134 | rm -f "$GIT_DIR/refs/reads/bisect" | |
135 | } | |
136 | ||
137 | case "$#" in | |
138 | 0) | |
139 | usage ;; | |
140 | *) | |
141 | cmd="$1" | |
142 | shift | |
143 | case "$cmd" in | |
144 | start) | |
145 | bisect_start "$@" ;; | |
146 | bad) | |
147 | bisect_bad "$@" ;; | |
148 | good) | |
149 | bisect_good "$@" ;; | |
150 | next) | |
151 | # Not sure we want "next" at the UI level anymore. | |
152 | bisect_next "$@" ;; | |
153 | reset) | |
154 | bisect_reset "$@" ;; | |
155 | *) | |
156 | usage ;; | |
157 | esac | |
158 | esac |