Fix passing of TCLTK_PATH to git-gui
[git/git.git] / git-bisect.sh
CommitLineData
8cc6a083 1#!/bin/sh
d025524d 2
a17c4101 3USAGE='[start|bad|good|next|reset|visualize|replay|log|run]'
d025524d
FK
4LONG_USAGE='git bisect start [<pathspec>] reset bisect state and start bisection.
5git bisect bad [<rev>] mark <rev> a known-bad revision.
6git bisect good [<rev>...] mark <rev>... known-good revisions.
7git bisect next find next bisection to test and check it out.
8git bisect reset [<branch>] finish bisection search and go back to branch.
9git bisect visualize show bisect status in gitk.
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10git bisect replay <logfile> replay bisection log.
11git bisect log show bisect log.
12git bisect run <cmd>... use <cmd>... to automatically bisect.'
d025524d 13
ae2b0f15 14. git-sh-setup
4c550686 15require_work_tree
8cc6a083 16
e9a45d75 17sq() {
d9bffc08 18 @@PERL@@ -e '
e9a45d75
JH
19 for (@ARGV) {
20 s/'\''/'\'\\\\\'\''/g;
21 print " '\''$_'\''";
22 }
23 print "\n";
24 ' "$@"
25}
26
8cc6a083
LT
27bisect_autostart() {
28 test -d "$GIT_DIR/refs/bisect" || {
29 echo >&2 'You need to start by "git bisect start"'
30 if test -t 0
31 then
32 echo >&2 -n 'Do you want me to do it for you [Y/n]? '
33 read yesno
34 case "$yesno" in
35 [Nn]*)
36 exit ;;
37 esac
38 bisect_start
39 else
40 exit 1
41 fi
42 }
43}
44
45bisect_start() {
8cc6a083
LT
46 #
47 # Verify HEAD. If we were bisecting before this, reset to the
48 # top-of-line master first!
49 #
8098a178
JH
50 head=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD) ||
51 die "Bad HEAD - I need a symbolic ref"
8cc6a083 52 case "$head" in
673e5838 53 refs/heads/bisect)
810255fd
PB
54 if [ -s "$GIT_DIR/head-name" ]; then
55 branch=`cat "$GIT_DIR/head-name"`
56 else
57 branch=master
58 fi
59 git checkout $branch || exit
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LT
60 ;;
61 refs/heads/*)
810255fd
PB
62 [ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
63 echo "$head" | sed 's#^refs/heads/##' >"$GIT_DIR/head-name"
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64 ;;
65 *)
8098a178 66 die "Bad HEAD - strange symbolic ref"
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67 ;;
68 esac
69
70 #
71 # Get rid of any old bisect state
72 #
73 rm -f "$GIT_DIR/refs/heads/bisect"
74 rm -rf "$GIT_DIR/refs/bisect/"
75 mkdir "$GIT_DIR/refs/bisect"
e9a45d75 76 {
9754563c 77 printf "git-bisect start"
e9a45d75
JH
78 sq "$@"
79 } >"$GIT_DIR/BISECT_LOG"
80 sq "$@" >"$GIT_DIR/BISECT_NAMES"
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LT
81}
82
83bisect_bad() {
84 bisect_autostart
cc9f24d0
JH
85 case "$#" in
86 0)
87 rev=$(git-rev-parse --verify HEAD) ;;
88 1)
cc65343a 89 rev=$(git-rev-parse --verify "$1^{commit}") ;;
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JH
90 *)
91 usage ;;
92 esac || exit
e204de28
JH
93 echo "$rev" >"$GIT_DIR/refs/bisect/bad"
94 echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
95 echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
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LT
96 bisect_auto_next
97}
98
99bisect_good() {
100 bisect_autostart
101 case "$#" in
102 0) revs=$(git-rev-parse --verify HEAD) || exit ;;
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JH
103 *) revs=$(git-rev-parse --revs-only --no-flags "$@") &&
104 test '' != "$revs" || die "Bad rev input: $@" ;;
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LT
105 esac
106 for rev in $revs
107 do
cc65343a 108 rev=$(git-rev-parse --verify "$rev^{commit}") || exit
cc9f24d0 109 echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
e204de28
JH
110 echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
111 echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
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112 done
113 bisect_auto_next
114}
115
116bisect_next_check() {
117 next_ok=no
118 test -f "$GIT_DIR/refs/bisect/bad" &&
119 case "$(cd "$GIT_DIR" && echo refs/bisect/good-*)" in
120 refs/bisect/good-\*) ;;
121 *) next_ok=yes ;;
122 esac
123 case "$next_ok,$1" in
124 no,) false ;;
125 no,fail)
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126 THEN=''
127 test -d "$GIT_DIR/refs/bisect" || {
128 echo >&2 'You need to start by "git bisect start".'
129 THEN='then '
130 }
131 echo >&2 'You '$THEN'need to give me at least one good' \
132 'and one bad revisions.'
133 echo >&2 '(You can use "git bisect bad" and' \
134 '"git bisect good" for that.)'
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LT
135 exit 1 ;;
136 *)
137 true ;;
138 esac
139}
140
141bisect_auto_next() {
434d036f 142 bisect_next_check && bisect_next || :
8cc6a083
LT
143}
144
145bisect_next() {
146 case "$#" in 0) ;; *) usage ;; esac
147 bisect_autostart
148 bisect_next_check fail
149 bad=$(git-rev-parse --verify refs/bisect/bad) &&
150 good=$(git-rev-parse --sq --revs-only --not \
151 $(cd "$GIT_DIR" && ls refs/bisect/good-*)) &&
12cb8137 152 rev=$(eval "git-rev-list --bisect $good $bad -- $(cat "$GIT_DIR/BISECT_NAMES")") || exit
670f5fe3
LT
153 if [ -z "$rev" ]; then
154 echo "$bad was both good and bad"
155 exit 1
156 fi
157 if [ "$rev" = "$bad" ]; then
7f47e72f
JH
158 echo "$rev is first bad commit"
159 git-diff-tree --pretty $rev
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160 exit 0
161 fi
b3cfd939 162 nr=$(eval "git-rev-list $rev $good -- $(cat $GIT_DIR/BISECT_NAMES)" | wc -l) || exit
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LT
163 echo "Bisecting: $nr revisions left to test after this"
164 echo "$rev" > "$GIT_DIR/refs/heads/new-bisect"
08f16750 165 git checkout -q new-bisect || exit
8cc6a083 166 mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
8098a178 167 GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD refs/heads/bisect
e204de28 168 git-show-branch "$rev"
8cc6a083
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169}
170
cc9f24d0
JH
171bisect_visualize() {
172 bisect_next_check fail
e9a45d75
JH
173 not=`cd "$GIT_DIR/refs" && echo bisect/good-*`
174 eval gitk bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
cc9f24d0
JH
175}
176
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LT
177bisect_reset() {
178 case "$#" in
810255fd
PB
179 0) if [ -s "$GIT_DIR/head-name" ]; then
180 branch=`cat "$GIT_DIR/head-name"`
181 else
182 branch=master
183 fi ;;
c0ce981f 184 1) git-show-ref --verify --quiet -- "refs/heads/$1" || {
8cc6a083
LT
185 echo >&2 "$1 does not seem to be a valid branch"
186 exit 1
187 }
188 branch="$1" ;;
189 *)
190 usage ;;
191 esac
9b709e47
PB
192 if git checkout "$branch"; then
193 rm -fr "$GIT_DIR/refs/bisect"
194 rm -f "$GIT_DIR/refs/heads/bisect" "$GIT_DIR/head-name"
195 rm -f "$GIT_DIR/BISECT_LOG"
196 rm -f "$GIT_DIR/BISECT_NAMES"
a17c4101 197 rm -f "$GIT_DIR/BISECT_RUN"
9b709e47 198 fi
e204de28
JH
199}
200
201bisect_replay () {
202 test -r "$1" || {
203 echo >&2 "cannot read $1 for replaying"
204 exit 1
205 }
206 bisect_reset
207 while read bisect command rev
208 do
209 test "$bisect" = "git-bisect" || continue
210 case "$command" in
211 start)
e9a45d75
JH
212 cmd="bisect_start $rev"
213 eval "$cmd"
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214 ;;
215 good)
216 echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
217 echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
218 echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
219 ;;
220 bad)
221 echo "$rev" >"$GIT_DIR/refs/bisect/bad"
222 echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
223 echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
224 ;;
225 *)
226 echo >&2 "?? what are you talking about?"
227 exit 1 ;;
228 esac
229 done <"$1"
230 bisect_auto_next
8cc6a083
LT
231}
232
a17c4101 233bisect_run () {
83020120
CC
234 bisect_next_check fail
235
a17c4101
CC
236 while true
237 do
238 echo "running $@"
239 "$@"
240 res=$?
241
242 # Check for really bad run error.
243 if [ $res -lt 0 -o $res -ge 128 ]; then
244 echo >&2 "bisect run failed:"
245 echo >&2 "exit code $res from '$@' is < 0 or >= 128"
246 exit $res
247 fi
248
249 # Use "bisect_good" or "bisect_bad"
250 # depending on run success or failure.
251 if [ $res -gt 0 ]; then
252 next_bisect='bisect_bad'
253 else
254 next_bisect='bisect_good'
255 fi
256
257 # We have to use a subshell because bisect_good or
258 # bisect_bad functions can exit.
259 ( $next_bisect > "$GIT_DIR/BISECT_RUN" )
260 res=$?
261
262 cat "$GIT_DIR/BISECT_RUN"
263
264 if [ $res -ne 0 ]; then
265 echo >&2 "bisect run failed:"
266 echo >&2 "$next_bisect exited with error code $res"
267 exit $res
268 fi
269
270 if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
271 echo "bisect run success"
272 exit 0;
273 fi
274
275 done
276}
277
278
8cc6a083
LT
279case "$#" in
2800)
281 usage ;;
282*)
283 cmd="$1"
284 shift
285 case "$cmd" in
286 start)
287 bisect_start "$@" ;;
288 bad)
289 bisect_bad "$@" ;;
290 good)
291 bisect_good "$@" ;;
292 next)
293 # Not sure we want "next" at the UI level anymore.
294 bisect_next "$@" ;;
cc9f24d0
JH
295 visualize)
296 bisect_visualize "$@" ;;
8cc6a083
LT
297 reset)
298 bisect_reset "$@" ;;
e204de28
JH
299 replay)
300 bisect_replay "$@" ;;
301 log)
302 cat "$GIT_DIR/BISECT_LOG" ;;
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303 run)
304 bisect_run "$@" ;;
8cc6a083
LT
305 *)
306 usage ;;
307 esac
308esac