1#!/bin/sh
2. git-sh-setup || dir "Not a git archive"
3usage() {
5 echo >&2 'usage: git bisect [start|bad|good|next|reset|visualize]
6git bisect start reset bisect state and start bisection.
7git bisect bad [<rev>] mark <rev> a known-bad revision.
8git bisect good [<rev>...] mark <rev>... known-good revisions.
9git bisect next find next bisection to test and check it out.
10git bisect reset [<branch>] finish bisection search and go back to branch.
11git bisect visualize show bisect status in gitk.
12git bisect replay <logfile> replay bisection log
13git bisect log show bisect log.'
14 exit 1
15}
16bisect_autostart() {
18 test -d "$GIT_DIR/refs/bisect" || {
19 echo >&2 'You need to start by "git bisect start"'
20 if test -t 0
21 then
22 echo >&2 -n 'Do you want me to do it for you [Y/n]? '
23 read yesno
24 case "$yesno" in
25 [Nn]*)
26 exit ;;
27 esac
28 bisect_start
29 else
30 exit 1
31 fi
32 }
33}
34bisect_start() {
36 case "$#" in 0) ;; *) usage ;; esac
37 #
38 # Verify HEAD. If we were bisecting before this, reset to the
39 # top-of-line master first!
40 #
41 head=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD) ||
42 die "Bad HEAD - I need a symbolic ref"
43 case "$head" in
44 refs/heads/bisect*)
45 git checkout master || exit
46 ;;
47 refs/heads/*)
48 ;;
49 *)
50 die "Bad HEAD - strange symbolic ref"
51 ;;
52 esac
53 #
55 # Get rid of any old bisect state
56 #
57 rm -f "$GIT_DIR/refs/heads/bisect"
58 rm -rf "$GIT_DIR/refs/bisect/"
59 mkdir "$GIT_DIR/refs/bisect"
60 echo "git-bisect start" >"$GIT_DIR/BISECT_LOG"
61}
62bisect_bad() {
64 bisect_autostart
65 case "$#" in
66 0)
67 rev=$(git-rev-parse --verify HEAD) ;;
68 1)
69 rev=$(git-rev-parse --verify "$1") ;;
70 *)
71 usage ;;
72 esac || exit
73 echo "$rev" >"$GIT_DIR/refs/bisect/bad"
74 echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
75 echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
76 bisect_auto_next
77}
78bisect_good() {
80 bisect_autostart
81 case "$#" in
82 0) revs=$(git-rev-parse --verify HEAD) || exit ;;
83 *) revs=$(git-rev-parse --revs-only --no-flags "$@") &&
84 test '' != "$revs" || die "Bad rev input: $@" ;;
85 esac
86 for rev in $revs
87 do
88 rev=$(git-rev-parse --verify "$rev") || exit
89 echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
90 echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
91 echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
92 done
93 bisect_auto_next
94}
95bisect_next_check() {
97 next_ok=no
98 test -f "$GIT_DIR/refs/bisect/bad" &&
99 case "$(cd "$GIT_DIR" && echo refs/bisect/good-*)" in
100 refs/bisect/good-\*) ;;
101 *) next_ok=yes ;;
102 esac
103 case "$next_ok,$1" in
104 no,) false ;;
105 no,fail)
106 echo >&2 'You need to give me at least one good and one bad revisions.'
107 exit 1 ;;
108 *)
109 true ;;
110 esac
111}
112bisect_auto_next() {
114 bisect_next_check && bisect_next || :
115}
116bisect_next() {
118 case "$#" in 0) ;; *) usage ;; esac
119 bisect_autostart
120 bisect_next_check fail
121 bad=$(git-rev-parse --verify refs/bisect/bad) &&
122 good=$(git-rev-parse --sq --revs-only --not \
123 $(cd "$GIT_DIR" && ls refs/bisect/good-*)) &&
124 rev=$(eval "git-rev-list --bisect $good $bad") || exit
125 if [ -z "$rev" ]; then
126 echo "$bad was both good and bad"
127 exit 1
128 fi
129 if [ "$rev" = "$bad" ]; then
130 echo "$rev is first bad commit"
131 git-diff-tree --pretty $rev
132 exit 0
133 fi
134 nr=$(eval "git-rev-list $rev $good" | wc -l) || exit
135 echo "Bisecting: $nr revisions left to test after this"
136 echo "$rev" > "$GIT_DIR/refs/heads/new-bisect"
137 git checkout new-bisect || exit
138 mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
139 GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD refs/heads/bisect
140 git-show-branch "$rev"
141}
142bisect_visualize() {
144 bisect_next_check fail
145 gitk bisect/bad --not `cd "$GIT_DIR/refs" && echo bisect/good-*`
146}
147bisect_reset() {
149 case "$#" in
150 0) branch=master ;;
151 1) test -f "$GIT_DIR/refs/heads/$1" || {
152 echo >&2 "$1 does not seem to be a valid branch"
153 exit 1
154 }
155 branch="$1" ;;
156 *)
157 usage ;;
158 esac
159 git checkout "$branch" &&
160 rm -fr "$GIT_DIR/refs/bisect"
161 rm -f "$GIT_DIR/refs/heads/bisect"
162 rm -f "$GIT_DIR/BISECT_LOG"
163}
164bisect_replay () {
166 test -r "$1" || {
167 echo >&2 "cannot read $1 for replaying"
168 exit 1
169 }
170 bisect_reset
171 while read bisect command rev
172 do
173 test "$bisect" = "git-bisect" || continue
174 case "$command" in
175 start)
176 bisect_start
177 ;;
178 good)
179 echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
180 echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
181 echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
182 ;;
183 bad)
184 echo "$rev" >"$GIT_DIR/refs/bisect/bad"
185 echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
186 echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
187 ;;
188 *)
189 echo >&2 "?? what are you talking about?"
190 exit 1 ;;
191 esac
192 done <"$1"
193 bisect_auto_next
194}
195case "$#" in
1970)
198 usage ;;
199*)
200 cmd="$1"
201 shift
202 case "$cmd" in
203 start)
204 bisect_start "$@" ;;
205 bad)
206 bisect_bad "$@" ;;
207 good)
208 bisect_good "$@" ;;
209 next)
210 # Not sure we want "next" at the UI level anymore.
211 bisect_next "$@" ;;
212 visualize)
213 bisect_visualize "$@" ;;
214 reset)
215 bisect_reset "$@" ;;
216 replay)
217 bisect_replay "$@" ;;
218 log)
219 cat "$GIT_DIR/BISECT_LOG" ;;
220 *)
221 usage ;;
222 esac
223esac