filter-branch: resolve $commit^{tree} in no-index case
[git] / t / test-lib.sh
1 # Test framework for git.  See t/README for usage.
2 #
3 # Copyright (c) 2005 Junio C Hamano
4 #
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 2 of the License, or
8 # (at your option) any later version.
9 #
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 # GNU General Public License for more details.
14 #
15 # You should have received a copy of the GNU General Public License
16 # along with this program.  If not, see http://www.gnu.org/licenses/ .
17
18 # Test the binaries we have just built.  The tests are kept in
19 # t/ subdirectory and are run in 'trash directory' subdirectory.
20 if test -z "$TEST_DIRECTORY"
21 then
22         # We allow tests to override this, in case they want to run tests
23         # outside of t/, e.g. for running tests on the test library
24         # itself.
25         TEST_DIRECTORY=$(pwd)
26 else
27         # ensure that TEST_DIRECTORY is an absolute path so that it
28         # is valid even if the current working directory is changed
29         TEST_DIRECTORY=$(cd "$TEST_DIRECTORY" && pwd) || exit 1
30 fi
31 if test -z "$TEST_OUTPUT_DIRECTORY"
32 then
33         # Similarly, override this to store the test-results subdir
34         # elsewhere
35         TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
36 fi
37 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
38
39 ################################################################
40 # It appears that people try to run tests without building...
41 "$GIT_BUILD_DIR/git" >/dev/null
42 if test $? != 1
43 then
44         echo >&2 'error: you do not seem to have built git yet.'
45         exit 1
46 fi
47
48 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
49 export PERL_PATH SHELL_PATH
50
51 # if --tee was passed, write the output not only to the terminal, but
52 # additionally to the file test-results/$BASENAME.out, too.
53 case "$GIT_TEST_TEE_STARTED, $* " in
54 done,*)
55         # do not redirect again
56         ;;
57 *' --tee '*|*' --va'*)
58         mkdir -p "$TEST_OUTPUT_DIRECTORY/test-results"
59         BASE="$TEST_OUTPUT_DIRECTORY/test-results/$(basename "$0" .sh)"
60         (GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
61          echo $? > $BASE.exit) | tee $BASE.out
62         test "$(cat $BASE.exit)" = 0
63         exit
64         ;;
65 esac
66
67 # For repeatability, reset the environment to known value.
68 # TERM is sanitized below, after saving color control sequences.
69 LANG=C
70 LC_ALL=C
71 PAGER=cat
72 TZ=UTC
73 export LANG LC_ALL PAGER TZ
74 EDITOR=:
75 # A call to "unset" with no arguments causes at least Solaris 10
76 # /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
77 # deriving from the command substitution clustered with the other
78 # ones.
79 unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
80         my @env = keys %ENV;
81         my $ok = join("|", qw(
82                 TRACE
83                 DEBUG
84                 USE_LOOKUP
85                 TEST
86                 .*_TEST
87                 PROVE
88                 VALGRIND
89                 UNZIP
90                 PERF_
91                 CURL_VERBOSE
92         ));
93         my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
94         print join("\n", @vars);
95 ')
96 unset XDG_CONFIG_HOME
97 unset GITPERLLIB
98 GIT_AUTHOR_EMAIL=author@example.com
99 GIT_AUTHOR_NAME='A U Thor'
100 GIT_COMMITTER_EMAIL=committer@example.com
101 GIT_COMMITTER_NAME='C O Mitter'
102 GIT_MERGE_VERBOSITY=5
103 GIT_MERGE_AUTOEDIT=no
104 export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
105 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
106 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
107 export EDITOR
108
109 # Tests using GIT_TRACE typically don't want <timestamp> <file>:<line> output
110 GIT_TRACE_BARE=1
111 export GIT_TRACE_BARE
112
113 if test -n "${TEST_GIT_INDEX_VERSION:+isset}"
114 then
115         GIT_INDEX_VERSION="$TEST_GIT_INDEX_VERSION"
116         export GIT_INDEX_VERSION
117 fi
118
119 # Add libc MALLOC and MALLOC_PERTURB test
120 # only if we are not executing the test with valgrind
121 if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
122    test -n "$TEST_NO_MALLOC_CHECK"
123 then
124         setup_malloc_check () {
125                 : nothing
126         }
127         teardown_malloc_check () {
128                 : nothing
129         }
130 else
131         setup_malloc_check () {
132                 MALLOC_CHECK_=3 MALLOC_PERTURB_=165
133                 export MALLOC_CHECK_ MALLOC_PERTURB_
134         }
135         teardown_malloc_check () {
136                 unset MALLOC_CHECK_ MALLOC_PERTURB_
137         }
138 fi
139
140 : ${ASAN_OPTIONS=detect_leaks=0}
141 export ASAN_OPTIONS
142
143 # Protect ourselves from common misconfiguration to export
144 # CDPATH into the environment
145 unset CDPATH
146
147 unset GREP_OPTIONS
148 unset UNZIP
149
150 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
151 1|2|true)
152         GIT_TRACE=4
153         ;;
154 esac
155
156 # Convenience
157 #
158 # A regexp to match 5 and 40 hexdigits
159 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
160 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
161
162 # Zero SHA-1
163 _z40=0000000000000000000000000000000000000000
164
165 # Line feed
166 LF='
167 '
168
169 # UTF-8 ZERO WIDTH NON-JOINER, which HFS+ ignores
170 # when case-folding filenames
171 u200c=$(printf '\342\200\214')
172
173 export _x05 _x40 _z40 LF u200c
174
175 # Each test should start with something like this, after copyright notices:
176 #
177 # test_description='Description of this test...
178 # This test checks if command xyzzy does the right thing...
179 # '
180 # . ./test-lib.sh
181 test "x$TERM" != "xdumb" && (
182                 test -t 1 &&
183                 tput bold >/dev/null 2>&1 &&
184                 tput setaf 1 >/dev/null 2>&1 &&
185                 tput sgr0 >/dev/null 2>&1
186         ) &&
187         color=t
188
189 while test "$#" -ne 0
190 do
191         case "$1" in
192         -d|--d|--de|--deb|--debu|--debug)
193                 debug=t; shift ;;
194         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
195                 immediate=t; shift ;;
196         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
197                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
198         -r)
199                 shift; test "$#" -ne 0 || {
200                         echo 'error: -r requires an argument' >&2;
201                         exit 1;
202                 }
203                 run_list=$1; shift ;;
204         --run=*)
205                 run_list=$(expr "z$1" : 'z[^=]*=\(.*\)'); shift ;;
206         -h|--h|--he|--hel|--help)
207                 help=t; shift ;;
208         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
209                 verbose=t; shift ;;
210         --verbose-only=*)
211                 verbose_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
212                 shift ;;
213         -q|--q|--qu|--qui|--quie|--quiet)
214                 # Ignore --quiet under a TAP::Harness. Saying how many tests
215                 # passed without the ok/not ok details is always an error.
216                 test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
217         --with-dashes)
218                 with_dashes=t; shift ;;
219         --no-color)
220                 color=; shift ;;
221         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
222                 valgrind=memcheck
223                 shift ;;
224         --valgrind=*)
225                 valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
226                 shift ;;
227         --valgrind-only=*)
228                 valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
229                 shift ;;
230         --tee)
231                 shift ;; # was handled already
232         --root=*)
233                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
234                 shift ;;
235         --chain-lint)
236                 GIT_TEST_CHAIN_LINT=1
237                 shift ;;
238         --no-chain-lint)
239                 GIT_TEST_CHAIN_LINT=0
240                 shift ;;
241         -x)
242                 trace=t
243                 verbose=t
244                 shift ;;
245         *)
246                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
247         esac
248 done
249
250 if test -n "$valgrind_only"
251 then
252         test -z "$valgrind" && valgrind=memcheck
253         test -z "$verbose" && verbose_only="$valgrind_only"
254 elif test -n "$valgrind"
255 then
256         verbose=t
257 fi
258
259 if test -n "$color"
260 then
261         # Save the color control sequences now rather than run tput
262         # each time say_color() is called.  This is done for two
263         # reasons:
264         #   * TERM will be changed to dumb
265         #   * HOME will be changed to a temporary directory and tput
266         #     might need to read ~/.terminfo from the original HOME
267         #     directory to get the control sequences
268         # Note:  This approach assumes the control sequences don't end
269         # in a newline for any terminal of interest (command
270         # substitutions strip trailing newlines).  Given that most
271         # (all?) terminals in common use are related to ECMA-48, this
272         # shouldn't be a problem.
273         say_color_error=$(tput bold; tput setaf 1) # bold red
274         say_color_skip=$(tput setaf 4) # blue
275         say_color_warn=$(tput setaf 3) # brown/yellow
276         say_color_pass=$(tput setaf 2) # green
277         say_color_info=$(tput setaf 6) # cyan
278         say_color_reset=$(tput sgr0)
279         say_color_="" # no formatting for normal text
280         say_color () {
281                 test -z "$1" && test -n "$quiet" && return
282                 eval "say_color_color=\$say_color_$1"
283                 shift
284                 printf "%s\\n" "$say_color_color$*$say_color_reset"
285         }
286 else
287         say_color() {
288                 test -z "$1" && test -n "$quiet" && return
289                 shift
290                 printf "%s\n" "$*"
291         }
292 fi
293
294 TERM=dumb
295 export TERM
296
297 error () {
298         say_color error "error: $*"
299         GIT_EXIT_OK=t
300         exit 1
301 }
302
303 say () {
304         say_color info "$*"
305 }
306
307 test "${test_description}" != "" ||
308 error "Test script did not set test_description."
309
310 if test "$help" = "t"
311 then
312         printf '%s\n' "$test_description"
313         exit 0
314 fi
315
316 exec 5>&1
317 exec 6<&0
318 if test "$verbose" = "t"
319 then
320         exec 4>&2 3>&1
321 else
322         exec 4>/dev/null 3>/dev/null
323 fi
324
325 test_failure=0
326 test_count=0
327 test_fixed=0
328 test_broken=0
329 test_success=0
330
331 test_external_has_tap=0
332
333 die () {
334         code=$?
335         if test -n "$GIT_EXIT_OK"
336         then
337                 exit $code
338         else
339                 echo >&5 "FATAL: Unexpected exit with code $code"
340                 exit 1
341         fi
342 }
343
344 GIT_EXIT_OK=
345 trap 'die' EXIT
346 trap 'exit $?' INT
347
348 # The user-facing functions are loaded from a separate file so that
349 # test_perf subshells can have them too
350 . "$TEST_DIRECTORY/test-lib-functions.sh"
351
352 # You are not expected to call test_ok_ and test_failure_ directly, use
353 # the test_expect_* functions instead.
354
355 test_ok_ () {
356         test_success=$(($test_success + 1))
357         say_color "" "ok $test_count - $@"
358 }
359
360 test_failure_ () {
361         test_failure=$(($test_failure + 1))
362         say_color error "not ok $test_count - $1"
363         shift
364         printf '%s\n' "$*" | sed -e 's/^/#      /'
365         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
366 }
367
368 test_known_broken_ok_ () {
369         test_fixed=$(($test_fixed+1))
370         say_color error "ok $test_count - $@ # TODO known breakage vanished"
371 }
372
373 test_known_broken_failure_ () {
374         test_broken=$(($test_broken+1))
375         say_color warn "not ok $test_count - $@ # TODO known breakage"
376 }
377
378 test_debug () {
379         test "$debug" = "" || eval "$1"
380 }
381
382 match_pattern_list () {
383         arg="$1"
384         shift
385         test -z "$*" && return 1
386         for pattern_
387         do
388                 case "$arg" in
389                 $pattern_)
390                         return 0
391                 esac
392         done
393         return 1
394 }
395
396 match_test_selector_list () {
397         title="$1"
398         shift
399         arg="$1"
400         shift
401         test -z "$1" && return 0
402
403         # Both commas and whitespace are accepted as separators.
404         OLDIFS=$IFS
405         IFS='   ,'
406         set -- $1
407         IFS=$OLDIFS
408
409         # If the first selector is negative we include by default.
410         include=
411         case "$1" in
412                 !*) include=t ;;
413         esac
414
415         for selector
416         do
417                 orig_selector=$selector
418
419                 positive=t
420                 case "$selector" in
421                         !*)
422                                 positive=
423                                 selector=${selector##?}
424                                 ;;
425                 esac
426
427                 test -z "$selector" && continue
428
429                 case "$selector" in
430                         *-*)
431                                 if expr "z${selector%%-*}" : "z[0-9]*[^0-9]" >/dev/null
432                                 then
433                                         echo "error: $title: invalid non-numeric in range" \
434                                                 "start: '$orig_selector'" >&2
435                                         exit 1
436                                 fi
437                                 if expr "z${selector#*-}" : "z[0-9]*[^0-9]" >/dev/null
438                                 then
439                                         echo "error: $title: invalid non-numeric in range" \
440                                                 "end: '$orig_selector'" >&2
441                                         exit 1
442                                 fi
443                                 ;;
444                         *)
445                                 if expr "z$selector" : "z[0-9]*[^0-9]" >/dev/null
446                                 then
447                                         echo "error: $title: invalid non-numeric in test" \
448                                                 "selector: '$orig_selector'" >&2
449                                         exit 1
450                                 fi
451                 esac
452
453                 # Short cut for "obvious" cases
454                 test -z "$include" && test -z "$positive" && continue
455                 test -n "$include" && test -n "$positive" && continue
456
457                 case "$selector" in
458                         -*)
459                                 if test $arg -le ${selector#-}
460                                 then
461                                         include=$positive
462                                 fi
463                                 ;;
464                         *-)
465                                 if test $arg -ge ${selector%-}
466                                 then
467                                         include=$positive
468                                 fi
469                                 ;;
470                         *-*)
471                                 if test ${selector%%-*} -le $arg \
472                                         && test $arg -le ${selector#*-}
473                                 then
474                                         include=$positive
475                                 fi
476                                 ;;
477                         *)
478                                 if test $arg -eq $selector
479                                 then
480                                         include=$positive
481                                 fi
482                                 ;;
483                 esac
484         done
485
486         test -n "$include"
487 }
488
489 maybe_teardown_verbose () {
490         test -z "$verbose_only" && return
491         exec 4>/dev/null 3>/dev/null
492         verbose=
493 }
494
495 last_verbose=t
496 maybe_setup_verbose () {
497         test -z "$verbose_only" && return
498         if match_pattern_list $test_count $verbose_only
499         then
500                 exec 4>&2 3>&1
501                 # Emit a delimiting blank line when going from
502                 # non-verbose to verbose.  Within verbose mode the
503                 # delimiter is printed by test_expect_*.  The choice
504                 # of the initial $last_verbose is such that before
505                 # test 1, we do not print it.
506                 test -z "$last_verbose" && echo >&3 ""
507                 verbose=t
508         else
509                 exec 4>/dev/null 3>/dev/null
510                 verbose=
511         fi
512         last_verbose=$verbose
513 }
514
515 maybe_teardown_valgrind () {
516         test -z "$GIT_VALGRIND" && return
517         GIT_VALGRIND_ENABLED=
518 }
519
520 maybe_setup_valgrind () {
521         test -z "$GIT_VALGRIND" && return
522         if test -z "$valgrind_only"
523         then
524                 GIT_VALGRIND_ENABLED=t
525                 return
526         fi
527         GIT_VALGRIND_ENABLED=
528         if match_pattern_list $test_count $valgrind_only
529         then
530                 GIT_VALGRIND_ENABLED=t
531         fi
532 }
533
534 want_trace () {
535         test "$trace" = t && test "$verbose" = t
536 }
537
538 # This is a separate function because some tests use
539 # "return" to end a test_expect_success block early
540 # (and we want to make sure we run any cleanup like
541 # "set +x").
542 test_eval_inner_ () {
543         # Do not add anything extra (including LF) after '$*'
544         eval "
545                 want_trace && set -x
546                 $*"
547 }
548
549 test_eval_ () {
550         # We run this block with stderr redirected to avoid extra cruft
551         # during a "-x" trace. Once in "set -x" mode, we cannot prevent
552         # the shell from printing the "set +x" to turn it off (nor the saving
553         # of $? before that). But we can make sure that the output goes to
554         # /dev/null.
555         #
556         # The test itself is run with stderr put back to &4 (so either to
557         # /dev/null, or to the original stderr if --verbose was used).
558         {
559                 test_eval_inner_ "$@" </dev/null >&3 2>&4
560                 test_eval_ret_=$?
561                 if want_trace
562                 then
563                         set +x
564                         if test "$test_eval_ret_" != 0
565                         then
566                                 say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
567                         fi
568                 fi
569         } 2>/dev/null
570         return $test_eval_ret_
571 }
572
573 test_run_ () {
574         test_cleanup=:
575         expecting_failure=$2
576
577         if test "${GIT_TEST_CHAIN_LINT:-1}" != 0; then
578                 # turn off tracing for this test-eval, as it simply creates
579                 # confusing noise in the "-x" output
580                 trace_tmp=$trace
581                 trace=
582                 # 117 is magic because it is unlikely to match the exit
583                 # code of other programs
584                 test_eval_ "(exit 117) && $1"
585                 if test "$?" != 117; then
586                         error "bug in the test script: broken &&-chain: $1"
587                 fi
588                 trace=$trace_tmp
589         fi
590
591         setup_malloc_check
592         test_eval_ "$1"
593         eval_ret=$?
594         teardown_malloc_check
595
596         if test -z "$immediate" || test $eval_ret = 0 ||
597            test -n "$expecting_failure" && test "$test_cleanup" != ":"
598         then
599                 setup_malloc_check
600                 test_eval_ "$test_cleanup"
601                 teardown_malloc_check
602         fi
603         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
604         then
605                 echo ""
606         fi
607         return "$eval_ret"
608 }
609
610 test_start_ () {
611         test_count=$(($test_count+1))
612         maybe_setup_verbose
613         maybe_setup_valgrind
614 }
615
616 test_finish_ () {
617         echo >&3 ""
618         maybe_teardown_valgrind
619         maybe_teardown_verbose
620 }
621
622 test_skip () {
623         to_skip=
624         skipped_reason=
625         if match_pattern_list $this_test.$test_count $GIT_SKIP_TESTS
626         then
627                 to_skip=t
628                 skipped_reason="GIT_SKIP_TESTS"
629         fi
630         if test -z "$to_skip" && test -n "$test_prereq" &&
631            ! test_have_prereq "$test_prereq"
632         then
633                 to_skip=t
634
635                 of_prereq=
636                 if test "$missing_prereq" != "$test_prereq"
637                 then
638                         of_prereq=" of $test_prereq"
639                 fi
640                 skipped_reason="missing $missing_prereq${of_prereq}"
641         fi
642         if test -z "$to_skip" && test -n "$run_list" &&
643                 ! match_test_selector_list '--run' $test_count "$run_list"
644         then
645                 to_skip=t
646                 skipped_reason="--run"
647         fi
648
649         case "$to_skip" in
650         t)
651                 say_color skip >&3 "skipping test: $@"
652                 say_color skip "ok $test_count # skip $1 ($skipped_reason)"
653                 : true
654                 ;;
655         *)
656                 false
657                 ;;
658         esac
659 }
660
661 # stub; perf-lib overrides it
662 test_at_end_hook_ () {
663         :
664 }
665
666 test_done () {
667         GIT_EXIT_OK=t
668
669         if test -z "$HARNESS_ACTIVE"
670         then
671                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
672                 mkdir -p "$test_results_dir"
673                 base=${0##*/}
674                 test_results_path="$test_results_dir/${base%.sh}-$$.counts"
675
676                 cat >>"$test_results_path" <<-EOF
677                 total $test_count
678                 success $test_success
679                 fixed $test_fixed
680                 broken $test_broken
681                 failed $test_failure
682
683                 EOF
684         fi
685
686         if test "$test_fixed" != 0
687         then
688                 say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
689         fi
690         if test "$test_broken" != 0
691         then
692                 say_color warn "# still have $test_broken known breakage(s)"
693         fi
694         if test "$test_broken" != 0 || test "$test_fixed" != 0
695         then
696                 test_remaining=$(( $test_count - $test_broken - $test_fixed ))
697                 msg="remaining $test_remaining test(s)"
698         else
699                 test_remaining=$test_count
700                 msg="$test_count test(s)"
701         fi
702         case "$test_failure" in
703         0)
704                 # Maybe print SKIP message
705                 if test -n "$skip_all" && test $test_count -gt 0
706                 then
707                         error "Can't use skip_all after running some tests"
708                 fi
709                 test -z "$skip_all" || skip_all=" # SKIP $skip_all"
710
711                 if test $test_external_has_tap -eq 0
712                 then
713                         if test $test_remaining -gt 0
714                         then
715                                 say_color pass "# passed all $msg"
716                         fi
717                         say "1..$test_count$skip_all"
718                 fi
719
720                 test -d "$remove_trash" &&
721                 cd "$(dirname "$remove_trash")" &&
722                 rm -rf "$(basename "$remove_trash")"
723
724                 test_at_end_hook_
725
726                 exit 0 ;;
727
728         *)
729                 if test $test_external_has_tap -eq 0
730                 then
731                         say_color error "# failed $test_failure among $msg"
732                         say "1..$test_count"
733                 fi
734
735                 exit 1 ;;
736
737         esac
738 }
739
740 if test -n "$valgrind"
741 then
742         make_symlink () {
743                 test -h "$2" &&
744                 test "$1" = "$(readlink "$2")" || {
745                         # be super paranoid
746                         if mkdir "$2".lock
747                         then
748                                 rm -f "$2" &&
749                                 ln -s "$1" "$2" &&
750                                 rm -r "$2".lock
751                         else
752                                 while test -d "$2".lock
753                                 do
754                                         say "Waiting for lock on $2."
755                                         sleep 1
756                                 done
757                         fi
758                 }
759         }
760
761         make_valgrind_symlink () {
762                 # handle only executables, unless they are shell libraries that
763                 # need to be in the exec-path.
764                 test -x "$1" ||
765                 test "# " = "$(head -c 2 <"$1")" ||
766                 return;
767
768                 base=$(basename "$1")
769                 symlink_target=$GIT_BUILD_DIR/$base
770                 # do not override scripts
771                 if test -x "$symlink_target" &&
772                     test ! -d "$symlink_target" &&
773                     test "#!" != "$(head -c 2 < "$symlink_target")"
774                 then
775                         symlink_target=../valgrind.sh
776                 fi
777                 case "$base" in
778                 *.sh|*.perl)
779                         symlink_target=../unprocessed-script
780                 esac
781                 # create the link, or replace it if it is out of date
782                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
783         }
784
785         # override all git executables in TEST_DIRECTORY/..
786         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
787         mkdir -p "$GIT_VALGRIND"/bin
788         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
789         do
790                 make_valgrind_symlink $file
791         done
792         # special-case the mergetools loadables
793         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
794         OLDIFS=$IFS
795         IFS=:
796         for path in $PATH
797         do
798                 ls "$path"/git-* 2> /dev/null |
799                 while read file
800                 do
801                         make_valgrind_symlink "$file"
802                 done
803         done
804         IFS=$OLDIFS
805         PATH=$GIT_VALGRIND/bin:$PATH
806         GIT_EXEC_PATH=$GIT_VALGRIND/bin
807         export GIT_VALGRIND
808         GIT_VALGRIND_MODE="$valgrind"
809         export GIT_VALGRIND_MODE
810         GIT_VALGRIND_ENABLED=t
811         test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
812         export GIT_VALGRIND_ENABLED
813 elif test -n "$GIT_TEST_INSTALLED"
814 then
815         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
816         error "Cannot run git from $GIT_TEST_INSTALLED."
817         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
818         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
819 else # normal case, use ../bin-wrappers only unless $with_dashes:
820         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
821         if ! test -x "$git_bin_dir/git"
822         then
823                 if test -z "$with_dashes"
824                 then
825                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
826                 fi
827                 with_dashes=t
828         fi
829         PATH="$git_bin_dir:$PATH"
830         GIT_EXEC_PATH=$GIT_BUILD_DIR
831         if test -n "$with_dashes"
832         then
833                 PATH="$GIT_BUILD_DIR:$PATH"
834         fi
835 fi
836 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
837 GIT_CONFIG_NOSYSTEM=1
838 GIT_ATTR_NOSYSTEM=1
839 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
840
841 if test -z "$GIT_TEST_CMP"
842 then
843         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
844         then
845                 GIT_TEST_CMP="$DIFF -c"
846         else
847                 GIT_TEST_CMP="$DIFF -u"
848         fi
849 fi
850
851 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
852 export GITPERLLIB
853 test -d "$GIT_BUILD_DIR"/templates/blt || {
854         error "You haven't built things yet, have you?"
855 }
856
857 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
858 then
859         echo >&2 'You need to build test-chmtime:'
860         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
861         exit 1
862 fi
863
864 # Test repository
865 TRASH_DIRECTORY="trash directory.$(basename "$0" .sh)"
866 test -n "$root" && TRASH_DIRECTORY="$root/$TRASH_DIRECTORY"
867 case "$TRASH_DIRECTORY" in
868 /*) ;; # absolute path is good
869  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$TRASH_DIRECTORY" ;;
870 esac
871 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
872 rm -fr "$TRASH_DIRECTORY" || {
873         GIT_EXIT_OK=t
874         echo >&5 "FATAL: Cannot prepare test area"
875         exit 1
876 }
877
878 HOME="$TRASH_DIRECTORY"
879 GNUPGHOME="$HOME/gnupg-home-not-used"
880 export HOME GNUPGHOME
881
882 if test -z "$TEST_NO_CREATE_REPO"
883 then
884         test_create_repo "$TRASH_DIRECTORY"
885 else
886         mkdir -p "$TRASH_DIRECTORY"
887 fi
888 # Use -P to resolve symlinks in our working directory so that the cwd
889 # in subprocesses like git equals our $PWD (for pathname comparisons).
890 cd -P "$TRASH_DIRECTORY" || exit 1
891
892 this_test=${0##*/}
893 this_test=${this_test%%-*}
894 if match_pattern_list "$this_test" $GIT_SKIP_TESTS
895 then
896         say_color info >&3 "skipping test $this_test altogether"
897         skip_all="skip all tests in $this_test"
898         test_done
899 fi
900
901 # Provide an implementation of the 'yes' utility
902 yes () {
903         if test $# = 0
904         then
905                 y=y
906         else
907                 y="$*"
908         fi
909
910         while echo "$y"
911         do
912                 :
913         done
914 }
915
916 # Fix some commands on Windows
917 case $(uname -s) in
918 *MINGW*)
919         # Windows has its own (incompatible) sort and find
920         sort () {
921                 /usr/bin/sort "$@"
922         }
923         find () {
924                 /usr/bin/find "$@"
925         }
926         sum () {
927                 md5sum "$@"
928         }
929         # git sees Windows-style pwd
930         pwd () {
931                 builtin pwd -W
932         }
933         # no POSIX permissions
934         # backslashes in pathspec are converted to '/'
935         # exec does not inherit the PID
936         test_set_prereq MINGW
937         test_set_prereq NATIVE_CRLF
938         test_set_prereq SED_STRIPS_CR
939         test_set_prereq GREP_STRIPS_CR
940         GIT_TEST_CMP=mingw_test_cmp
941         ;;
942 *CYGWIN*)
943         test_set_prereq POSIXPERM
944         test_set_prereq EXECKEEPSPID
945         test_set_prereq CYGWIN
946         test_set_prereq SED_STRIPS_CR
947         test_set_prereq GREP_STRIPS_CR
948         ;;
949 *)
950         test_set_prereq POSIXPERM
951         test_set_prereq BSLASHPSPEC
952         test_set_prereq EXECKEEPSPID
953         ;;
954 esac
955
956 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
957 test -z "$NO_PERL" && test_set_prereq PERL
958 test -z "$NO_PYTHON" && test_set_prereq PYTHON
959 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
960 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
961
962 # Can we rely on git's output in the C locale?
963 if test -n "$GETTEXT_POISON"
964 then
965         GIT_GETTEXT_POISON=YesPlease
966         export GIT_GETTEXT_POISON
967         test_set_prereq GETTEXT_POISON
968 else
969         test_set_prereq C_LOCALE_OUTPUT
970 fi
971
972 # Use this instead of test_cmp to compare files that contain expected and
973 # actual output from git commands that can be translated.  When running
974 # under GETTEXT_POISON this pretends that the command produced expected
975 # results.
976 test_i18ncmp () {
977         test -n "$GETTEXT_POISON" || test_cmp "$@"
978 }
979
980 # Use this instead of "grep expected-string actual" to see if the
981 # output from a git command that can be translated either contains an
982 # expected string, or does not contain an unwanted one.  When running
983 # under GETTEXT_POISON this pretends that the command produced expected
984 # results.
985 test_i18ngrep () {
986         if test -n "$GETTEXT_POISON"
987         then
988             : # pretend success
989         elif test "x!" = "x$1"
990         then
991                 shift
992                 ! grep "$@"
993         else
994                 grep "$@"
995         fi
996 }
997
998 test_lazy_prereq PIPE '
999         # test whether the filesystem supports FIFOs
1000         case $(uname -s) in
1001         CYGWIN*)
1002                 false
1003                 ;;
1004         *)
1005                 rm -f testfifo && mkfifo testfifo
1006                 ;;
1007         esac
1008 '
1009
1010 test_lazy_prereq SYMLINKS '
1011         # test whether the filesystem supports symbolic links
1012         ln -s x y && test -h y
1013 '
1014
1015 test_lazy_prereq FILEMODE '
1016         test "$(git config --bool core.filemode)" = true
1017 '
1018
1019 test_lazy_prereq CASE_INSENSITIVE_FS '
1020         echo good >CamelCase &&
1021         echo bad >camelcase &&
1022         test "$(cat CamelCase)" != good
1023 '
1024
1025 test_lazy_prereq UTF8_NFD_TO_NFC '
1026         # check whether FS converts nfd unicode to nfc
1027         auml=$(printf "\303\244")
1028         aumlcdiar=$(printf "\141\314\210")
1029         >"$auml" &&
1030         case "$(echo *)" in
1031         "$aumlcdiar")
1032                 true ;;
1033         *)
1034                 false ;;
1035         esac
1036 '
1037
1038 test_lazy_prereq AUTOIDENT '
1039         sane_unset GIT_AUTHOR_NAME &&
1040         sane_unset GIT_AUTHOR_EMAIL &&
1041         git var GIT_AUTHOR_IDENT
1042 '
1043
1044 test_lazy_prereq EXPENSIVE '
1045         test -n "$GIT_TEST_LONG"
1046 '
1047
1048 test_lazy_prereq USR_BIN_TIME '
1049         test -x /usr/bin/time
1050 '
1051
1052 test_lazy_prereq NOT_ROOT '
1053         uid=$(id -u) &&
1054         test "$uid" != 0
1055 '
1056
1057 # On a filesystem that lacks SANITY, a file can be deleted even if
1058 # the containing directory doesn't have write permissions, or a file
1059 # can be accessed even if the containing directory doesn't have read
1060 # or execute permissions, causing our tests that validate that Git
1061 # works sensibly in such situations.
1062 test_lazy_prereq SANITY '
1063         mkdir SANETESTD.1 SANETESTD.2 &&
1064
1065         chmod +w SANETESTD.1 SANETESTD.2 &&
1066         >SANETESTD.1/x 2>SANETESTD.2/x &&
1067         chmod -w SANETESTD.1 &&
1068         chmod -rx SANETESTD.2 ||
1069         error "bug in test sript: cannot prepare SANETESTD"
1070
1071         ! rm SANETESTD.1/x && ! test -f SANETESTD.2/x
1072         status=$?
1073
1074         chmod +rwx SANETESTD.1 SANETESTD.2 &&
1075         rm -rf SANETESTD.1 SANETESTD.2 ||
1076         error "bug in test sript: cannot clean SANETESTD"
1077         return $status
1078 '
1079
1080 GIT_UNZIP=${GIT_UNZIP:-unzip}
1081 test_lazy_prereq UNZIP '
1082         "$GIT_UNZIP" -v
1083         test $? -ne 127
1084 '
1085
1086 run_with_limited_cmdline () {
1087         (ulimit -s 128 && "$@")
1088 }
1089
1090 test_lazy_prereq CMDLINE_LIMIT 'run_with_limited_cmdline true'