Merge branch 'rh/prompt-pcmode-avoid-eval-on-refname' into maint
[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 # Keep the original TERM for say_color
19 ORIGINAL_TERM=$TERM
20
21 # Test the binaries we have just built.  The tests are kept in
22 # t/ subdirectory and are run in 'trash directory' subdirectory.
23 if test -z "$TEST_DIRECTORY"
24 then
25         # We allow tests to override this, in case they want to run tests
26         # outside of t/, e.g. for running tests on the test library
27         # itself.
28         TEST_DIRECTORY=$(pwd)
29 else
30         # ensure that TEST_DIRECTORY is an absolute path so that it
31         # is valid even if the current working directory is changed
32         TEST_DIRECTORY=$(cd "$TEST_DIRECTORY" && pwd) || exit 1
33 fi
34 if test -z "$TEST_OUTPUT_DIRECTORY"
35 then
36         # Similarly, override this to store the test-results subdir
37         # elsewhere
38         TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
39 fi
40 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
41
42 ################################################################
43 # It appears that people try to run tests without building...
44 "$GIT_BUILD_DIR/git" >/dev/null
45 if test $? != 1
46 then
47         echo >&2 'error: you do not seem to have built git yet.'
48         exit 1
49 fi
50
51 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
52 export PERL_PATH SHELL_PATH
53
54 # if --tee was passed, write the output not only to the terminal, but
55 # additionally to the file test-results/$BASENAME.out, too.
56 case "$GIT_TEST_TEE_STARTED, $* " in
57 done,*)
58         # do not redirect again
59         ;;
60 *' --tee '*|*' --va'*)
61         mkdir -p "$TEST_OUTPUT_DIRECTORY/test-results"
62         BASE="$TEST_OUTPUT_DIRECTORY/test-results/$(basename "$0" .sh)"
63         (GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
64          echo $? > $BASE.exit) | tee $BASE.out
65         test "$(cat $BASE.exit)" = 0
66         exit
67         ;;
68 esac
69
70 # For repeatability, reset the environment to known value.
71 LANG=C
72 LC_ALL=C
73 PAGER=cat
74 TZ=UTC
75 TERM=dumb
76 export LANG LC_ALL PAGER TERM TZ
77 EDITOR=:
78 # A call to "unset" with no arguments causes at least Solaris 10
79 # /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
80 # deriving from the command substitution clustered with the other
81 # ones.
82 unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
83         my @env = keys %ENV;
84         my $ok = join("|", qw(
85                 TRACE
86                 DEBUG
87                 USE_LOOKUP
88                 TEST
89                 .*_TEST
90                 PROVE
91                 VALGRIND
92                 UNZIP
93                 PERF_
94         ));
95         my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
96         print join("\n", @vars);
97 ')
98 unset XDG_CONFIG_HOME
99 unset GITPERLLIB
100 GIT_AUTHOR_EMAIL=author@example.com
101 GIT_AUTHOR_NAME='A U Thor'
102 GIT_COMMITTER_EMAIL=committer@example.com
103 GIT_COMMITTER_NAME='C O Mitter'
104 GIT_MERGE_VERBOSITY=5
105 GIT_MERGE_AUTOEDIT=no
106 export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
107 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
108 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
109 export EDITOR
110
111 # Add libc MALLOC and MALLOC_PERTURB test
112 # only if we are not executing the test with valgrind
113 if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
114    test -n "$TEST_NO_MALLOC_CHECK"
115 then
116         setup_malloc_check () {
117                 : nothing
118         }
119         teardown_malloc_check () {
120                 : nothing
121         }
122 else
123         setup_malloc_check () {
124                 MALLOC_CHECK_=3 MALLOC_PERTURB_=165
125                 export MALLOC_CHECK_ MALLOC_PERTURB_
126         }
127         teardown_malloc_check () {
128                 unset MALLOC_CHECK_ MALLOC_PERTURB_
129         }
130 fi
131
132 # Protect ourselves from common misconfiguration to export
133 # CDPATH into the environment
134 unset CDPATH
135
136 unset GREP_OPTIONS
137 unset UNZIP
138
139 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
140 1|2|true)
141         echo "* warning: Some tests will not work if GIT_TRACE" \
142                 "is set as to trace on STDERR ! *"
143         echo "* warning: Please set GIT_TRACE to something" \
144                 "other than 1, 2 or true ! *"
145         ;;
146 esac
147
148 # Convenience
149 #
150 # A regexp to match 5 and 40 hexdigits
151 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
152 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
153
154 # Zero SHA-1
155 _z40=0000000000000000000000000000000000000000
156
157 # Line feed
158 LF='
159 '
160
161 export _x05 _x40 _z40 LF
162
163 # Each test should start with something like this, after copyright notices:
164 #
165 # test_description='Description of this test...
166 # This test checks if command xyzzy does the right thing...
167 # '
168 # . ./test-lib.sh
169 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
170                 TERM=$ORIGINAL_TERM &&
171                 export TERM &&
172                 [ -t 1 ] &&
173                 tput bold >/dev/null 2>&1 &&
174                 tput setaf 1 >/dev/null 2>&1 &&
175                 tput sgr0 >/dev/null 2>&1
176         ) &&
177         color=t
178
179 while test "$#" -ne 0
180 do
181         case "$1" in
182         -d|--d|--de|--deb|--debu|--debug)
183                 debug=t; shift ;;
184         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
185                 immediate=t; shift ;;
186         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
187                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
188         -h|--h|--he|--hel|--help)
189                 help=t; shift ;;
190         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
191                 verbose=t; shift ;;
192         --verbose-only=*)
193                 verbose_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
194                 shift ;;
195         -q|--q|--qu|--qui|--quie|--quiet)
196                 # Ignore --quiet under a TAP::Harness. Saying how many tests
197                 # passed without the ok/not ok details is always an error.
198                 test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
199         --with-dashes)
200                 with_dashes=t; shift ;;
201         --no-color)
202                 color=; shift ;;
203         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
204                 valgrind=memcheck
205                 shift ;;
206         --valgrind=*)
207                 valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
208                 shift ;;
209         --valgrind-only=*)
210                 valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
211                 shift ;;
212         --tee)
213                 shift ;; # was handled already
214         --root=*)
215                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
216                 shift ;;
217         *)
218                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
219         esac
220 done
221
222 if test -n "$valgrind_only"
223 then
224         test -z "$valgrind" && valgrind=memcheck
225         test -z "$verbose" && verbose_only="$valgrind_only"
226 elif test -n "$valgrind"
227 then
228         verbose=t
229 fi
230
231 if test -n "$color"
232 then
233         say_color () {
234                 (
235                 TERM=$ORIGINAL_TERM
236                 export TERM
237                 case "$1" in
238                 error)
239                         tput bold; tput setaf 1;; # bold red
240                 skip)
241                         tput setaf 4;; # blue
242                 warn)
243                         tput setaf 3;; # brown/yellow
244                 pass)
245                         tput setaf 2;; # green
246                 info)
247                         tput setaf 6;; # cyan
248                 *)
249                         test -n "$quiet" && return;;
250                 esac
251                 shift
252                 printf "%s" "$*"
253                 tput sgr0
254                 echo
255                 )
256         }
257 else
258         say_color() {
259                 test -z "$1" && test -n "$quiet" && return
260                 shift
261                 printf "%s\n" "$*"
262         }
263 fi
264
265 error () {
266         say_color error "error: $*"
267         GIT_EXIT_OK=t
268         exit 1
269 }
270
271 say () {
272         say_color info "$*"
273 }
274
275 test "${test_description}" != "" ||
276 error "Test script did not set test_description."
277
278 if test "$help" = "t"
279 then
280         printf '%s\n' "$test_description"
281         exit 0
282 fi
283
284 exec 5>&1
285 exec 6<&0
286 if test "$verbose" = "t"
287 then
288         exec 4>&2 3>&1
289 else
290         exec 4>/dev/null 3>/dev/null
291 fi
292
293 test_failure=0
294 test_count=0
295 test_fixed=0
296 test_broken=0
297 test_success=0
298
299 test_external_has_tap=0
300
301 die () {
302         code=$?
303         if test -n "$GIT_EXIT_OK"
304         then
305                 exit $code
306         else
307                 echo >&5 "FATAL: Unexpected exit with code $code"
308                 exit 1
309         fi
310 }
311
312 GIT_EXIT_OK=
313 trap 'die' EXIT
314
315 # The user-facing functions are loaded from a separate file so that
316 # test_perf subshells can have them too
317 . "$TEST_DIRECTORY/test-lib-functions.sh"
318
319 # You are not expected to call test_ok_ and test_failure_ directly, use
320 # the test_expect_* functions instead.
321
322 test_ok_ () {
323         test_success=$(($test_success + 1))
324         say_color "" "ok $test_count - $@"
325 }
326
327 test_failure_ () {
328         test_failure=$(($test_failure + 1))
329         say_color error "not ok $test_count - $1"
330         shift
331         printf '%s\n' "$*" | sed -e 's/^/#      /'
332         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
333 }
334
335 test_known_broken_ok_ () {
336         test_fixed=$(($test_fixed+1))
337         say_color error "ok $test_count - $@ # TODO known breakage vanished"
338 }
339
340 test_known_broken_failure_ () {
341         test_broken=$(($test_broken+1))
342         say_color warn "not ok $test_count - $@ # TODO known breakage"
343 }
344
345 test_debug () {
346         test "$debug" = "" || eval "$1"
347 }
348
349 match_pattern_list () {
350         arg="$1"
351         shift
352         test -z "$*" && return 1
353         for pattern_
354         do
355                 case "$arg" in
356                 $pattern_)
357                         return 0
358                 esac
359         done
360         return 1
361 }
362
363 maybe_teardown_verbose () {
364         test -z "$verbose_only" && return
365         exec 4>/dev/null 3>/dev/null
366         verbose=
367 }
368
369 last_verbose=t
370 maybe_setup_verbose () {
371         test -z "$verbose_only" && return
372         if match_pattern_list $test_count $verbose_only
373         then
374                 exec 4>&2 3>&1
375                 # Emit a delimiting blank line when going from
376                 # non-verbose to verbose.  Within verbose mode the
377                 # delimiter is printed by test_expect_*.  The choice
378                 # of the initial $last_verbose is such that before
379                 # test 1, we do not print it.
380                 test -z "$last_verbose" && echo >&3 ""
381                 verbose=t
382         else
383                 exec 4>/dev/null 3>/dev/null
384                 verbose=
385         fi
386         last_verbose=$verbose
387 }
388
389 maybe_teardown_valgrind () {
390         test -z "$GIT_VALGRIND" && return
391         GIT_VALGRIND_ENABLED=
392 }
393
394 maybe_setup_valgrind () {
395         test -z "$GIT_VALGRIND" && return
396         if test -z "$valgrind_only"
397         then
398                 GIT_VALGRIND_ENABLED=t
399                 return
400         fi
401         GIT_VALGRIND_ENABLED=
402         if match_pattern_list $test_count $valgrind_only
403         then
404                 GIT_VALGRIND_ENABLED=t
405         fi
406 }
407
408 test_eval_ () {
409         # This is a separate function because some tests use
410         # "return" to end a test_expect_success block early.
411         eval </dev/null >&3 2>&4 "$*"
412 }
413
414 test_run_ () {
415         test_cleanup=:
416         expecting_failure=$2
417         setup_malloc_check
418         test_eval_ "$1"
419         eval_ret=$?
420         teardown_malloc_check
421
422         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
423         then
424                 setup_malloc_check
425                 test_eval_ "$test_cleanup"
426                 teardown_malloc_check
427         fi
428         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
429         then
430                 echo ""
431         fi
432         return "$eval_ret"
433 }
434
435 test_start_ () {
436         test_count=$(($test_count+1))
437         maybe_setup_verbose
438         maybe_setup_valgrind
439 }
440
441 test_finish_ () {
442         echo >&3 ""
443         maybe_teardown_valgrind
444         maybe_teardown_verbose
445 }
446
447 test_skip () {
448         to_skip=
449         if match_pattern_list $this_test.$test_count $GIT_SKIP_TESTS
450         then
451                 to_skip=t
452         fi
453         if test -z "$to_skip" && test -n "$test_prereq" &&
454            ! test_have_prereq "$test_prereq"
455         then
456                 to_skip=t
457         fi
458         case "$to_skip" in
459         t)
460                 of_prereq=
461                 if test "$missing_prereq" != "$test_prereq"
462                 then
463                         of_prereq=" of $test_prereq"
464                 fi
465
466                 say_color skip >&3 "skipping test: $@"
467                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
468                 : true
469                 ;;
470         *)
471                 false
472                 ;;
473         esac
474 }
475
476 # stub; perf-lib overrides it
477 test_at_end_hook_ () {
478         :
479 }
480
481 test_done () {
482         GIT_EXIT_OK=t
483
484         if test -z "$HARNESS_ACTIVE"
485         then
486                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
487                 mkdir -p "$test_results_dir"
488                 base=${0##*/}
489                 test_results_path="$test_results_dir/${base%.sh}-$$.counts"
490
491                 cat >>"$test_results_path" <<-EOF
492                 total $test_count
493                 success $test_success
494                 fixed $test_fixed
495                 broken $test_broken
496                 failed $test_failure
497
498                 EOF
499         fi
500
501         if test "$test_fixed" != 0
502         then
503                 say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
504         fi
505         if test "$test_broken" != 0
506         then
507                 say_color warn "# still have $test_broken known breakage(s)"
508         fi
509         if test "$test_broken" != 0 || test "$test_fixed" != 0
510         then
511                 test_remaining=$(( $test_count - $test_broken - $test_fixed ))
512                 msg="remaining $test_remaining test(s)"
513         else
514                 test_remaining=$test_count
515                 msg="$test_count test(s)"
516         fi
517         case "$test_failure" in
518         0)
519                 # Maybe print SKIP message
520                 if test -n "$skip_all" && test $test_count -gt 0
521                 then
522                         error "Can't use skip_all after running some tests"
523                 fi
524                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
525
526                 if test $test_external_has_tap -eq 0
527                 then
528                         if test $test_remaining -gt 0
529                         then
530                                 say_color pass "# passed all $msg"
531                         fi
532                         say "1..$test_count$skip_all"
533                 fi
534
535                 test -d "$remove_trash" &&
536                 cd "$(dirname "$remove_trash")" &&
537                 rm -rf "$(basename "$remove_trash")"
538
539                 test_at_end_hook_
540
541                 exit 0 ;;
542
543         *)
544                 if test $test_external_has_tap -eq 0
545                 then
546                         say_color error "# failed $test_failure among $msg"
547                         say "1..$test_count"
548                 fi
549
550                 exit 1 ;;
551
552         esac
553 }
554
555 if test -n "$valgrind"
556 then
557         make_symlink () {
558                 test -h "$2" &&
559                 test "$1" = "$(readlink "$2")" || {
560                         # be super paranoid
561                         if mkdir "$2".lock
562                         then
563                                 rm -f "$2" &&
564                                 ln -s "$1" "$2" &&
565                                 rm -r "$2".lock
566                         else
567                                 while test -d "$2".lock
568                                 do
569                                         say "Waiting for lock on $2."
570                                         sleep 1
571                                 done
572                         fi
573                 }
574         }
575
576         make_valgrind_symlink () {
577                 # handle only executables, unless they are shell libraries that
578                 # need to be in the exec-path.
579                 test -x "$1" ||
580                 test "# " = "$(head -c 2 <"$1")" ||
581                 return;
582
583                 base=$(basename "$1")
584                 symlink_target=$GIT_BUILD_DIR/$base
585                 # do not override scripts
586                 if test -x "$symlink_target" &&
587                     test ! -d "$symlink_target" &&
588                     test "#!" != "$(head -c 2 < "$symlink_target")"
589                 then
590                         symlink_target=../valgrind.sh
591                 fi
592                 case "$base" in
593                 *.sh|*.perl)
594                         symlink_target=../unprocessed-script
595                 esac
596                 # create the link, or replace it if it is out of date
597                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
598         }
599
600         # override all git executables in TEST_DIRECTORY/..
601         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
602         mkdir -p "$GIT_VALGRIND"/bin
603         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
604         do
605                 make_valgrind_symlink $file
606         done
607         # special-case the mergetools loadables
608         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
609         OLDIFS=$IFS
610         IFS=:
611         for path in $PATH
612         do
613                 ls "$path"/git-* 2> /dev/null |
614                 while read file
615                 do
616                         make_valgrind_symlink "$file"
617                 done
618         done
619         IFS=$OLDIFS
620         PATH=$GIT_VALGRIND/bin:$PATH
621         GIT_EXEC_PATH=$GIT_VALGRIND/bin
622         export GIT_VALGRIND
623         GIT_VALGRIND_MODE="$valgrind"
624         export GIT_VALGRIND_MODE
625         GIT_VALGRIND_ENABLED=t
626         test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
627         export GIT_VALGRIND_ENABLED
628 elif test -n "$GIT_TEST_INSTALLED"
629 then
630         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
631         error "Cannot run git from $GIT_TEST_INSTALLED."
632         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
633         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
634 else # normal case, use ../bin-wrappers only unless $with_dashes:
635         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
636         if ! test -x "$git_bin_dir/git"
637         then
638                 if test -z "$with_dashes"
639                 then
640                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
641                 fi
642                 with_dashes=t
643         fi
644         PATH="$git_bin_dir:$PATH"
645         GIT_EXEC_PATH=$GIT_BUILD_DIR
646         if test -n "$with_dashes"
647         then
648                 PATH="$GIT_BUILD_DIR:$PATH"
649         fi
650 fi
651 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
652 unset GIT_CONFIG
653 GIT_CONFIG_NOSYSTEM=1
654 GIT_ATTR_NOSYSTEM=1
655 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
656
657 if test -z "$GIT_TEST_CMP"
658 then
659         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
660         then
661                 GIT_TEST_CMP="$DIFF -c"
662         else
663                 GIT_TEST_CMP="$DIFF -u"
664         fi
665 fi
666
667 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
668 export GITPERLLIB
669 test -d "$GIT_BUILD_DIR"/templates/blt || {
670         error "You haven't built things yet, have you?"
671 }
672
673 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
674 then
675         echo >&2 'You need to build test-chmtime:'
676         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
677         exit 1
678 fi
679
680 # Test repository
681 TRASH_DIRECTORY="trash directory.$(basename "$0" .sh)"
682 test -n "$root" && TRASH_DIRECTORY="$root/$TRASH_DIRECTORY"
683 case "$TRASH_DIRECTORY" in
684 /*) ;; # absolute path is good
685  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$TRASH_DIRECTORY" ;;
686 esac
687 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
688 rm -fr "$TRASH_DIRECTORY" || {
689         GIT_EXIT_OK=t
690         echo >&5 "FATAL: Cannot prepare test area"
691         exit 1
692 }
693
694 HOME="$TRASH_DIRECTORY"
695 export HOME
696
697 if test -z "$TEST_NO_CREATE_REPO"
698 then
699         test_create_repo "$TRASH_DIRECTORY"
700 else
701         mkdir -p "$TRASH_DIRECTORY"
702 fi
703 # Use -P to resolve symlinks in our working directory so that the cwd
704 # in subprocesses like git equals our $PWD (for pathname comparisons).
705 cd -P "$TRASH_DIRECTORY" || exit 1
706
707 this_test=${0##*/}
708 this_test=${this_test%%-*}
709 if match_pattern_list "$this_test" $GIT_SKIP_TESTS
710 then
711         say_color info >&3 "skipping test $this_test altogether"
712         skip_all="skip all tests in $this_test"
713         test_done
714 fi
715
716 # Provide an implementation of the 'yes' utility
717 yes () {
718         if test $# = 0
719         then
720                 y=y
721         else
722                 y="$*"
723         fi
724
725         while echo "$y"
726         do
727                 :
728         done
729 }
730
731 # Fix some commands on Windows
732 case $(uname -s) in
733 *MINGW*)
734         # Windows has its own (incompatible) sort and find
735         sort () {
736                 /usr/bin/sort "$@"
737         }
738         find () {
739                 /usr/bin/find "$@"
740         }
741         sum () {
742                 md5sum "$@"
743         }
744         # git sees Windows-style pwd
745         pwd () {
746                 builtin pwd -W
747         }
748         # no POSIX permissions
749         # backslashes in pathspec are converted to '/'
750         # exec does not inherit the PID
751         test_set_prereq MINGW
752         test_set_prereq NOT_CYGWIN
753         test_set_prereq SED_STRIPS_CR
754         test_set_prereq GREP_STRIPS_CR
755         GIT_TEST_CMP=mingw_test_cmp
756         ;;
757 *CYGWIN*)
758         test_set_prereq POSIXPERM
759         test_set_prereq EXECKEEPSPID
760         test_set_prereq NOT_MINGW
761         test_set_prereq CYGWIN
762         test_set_prereq SED_STRIPS_CR
763         test_set_prereq GREP_STRIPS_CR
764         ;;
765 *)
766         test_set_prereq POSIXPERM
767         test_set_prereq BSLASHPSPEC
768         test_set_prereq EXECKEEPSPID
769         test_set_prereq NOT_MINGW
770         test_set_prereq NOT_CYGWIN
771         ;;
772 esac
773
774 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
775 test -z "$NO_PERL" && test_set_prereq PERL
776 test -z "$NO_PYTHON" && test_set_prereq PYTHON
777 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
778 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
779
780 # Can we rely on git's output in the C locale?
781 if test -n "$GETTEXT_POISON"
782 then
783         GIT_GETTEXT_POISON=YesPlease
784         export GIT_GETTEXT_POISON
785         test_set_prereq GETTEXT_POISON
786 else
787         test_set_prereq C_LOCALE_OUTPUT
788 fi
789
790 # Use this instead of test_cmp to compare files that contain expected and
791 # actual output from git commands that can be translated.  When running
792 # under GETTEXT_POISON this pretends that the command produced expected
793 # results.
794 test_i18ncmp () {
795         test -n "$GETTEXT_POISON" || test_cmp "$@"
796 }
797
798 # Use this instead of "grep expected-string actual" to see if the
799 # output from a git command that can be translated either contains an
800 # expected string, or does not contain an unwanted one.  When running
801 # under GETTEXT_POISON this pretends that the command produced expected
802 # results.
803 test_i18ngrep () {
804         if test -n "$GETTEXT_POISON"
805         then
806             : # pretend success
807         elif test "x!" = "x$1"
808         then
809                 shift
810                 ! grep "$@"
811         else
812                 grep "$@"
813         fi
814 }
815
816 test_lazy_prereq PIPE '
817         # test whether the filesystem supports FIFOs
818         case $(uname -s) in
819         CYGWIN*)
820                 false
821                 ;;
822         *)
823                 rm -f testfifo && mkfifo testfifo
824                 ;;
825         esac
826 '
827
828 test_lazy_prereq SYMLINKS '
829         # test whether the filesystem supports symbolic links
830         ln -s x y && test -h y
831 '
832
833 test_lazy_prereq FILEMODE '
834         test "$(git config --bool core.filemode)" = true
835 '
836
837 test_lazy_prereq CASE_INSENSITIVE_FS '
838         echo good >CamelCase &&
839         echo bad >camelcase &&
840         test "$(cat CamelCase)" != good
841 '
842
843 test_lazy_prereq UTF8_NFD_TO_NFC '
844         # check whether FS converts nfd unicode to nfc
845         auml=$(printf "\303\244")
846         aumlcdiar=$(printf "\141\314\210")
847         >"$auml" &&
848         case "$(echo *)" in
849         "$aumlcdiar")
850                 true ;;
851         *)
852                 false ;;
853         esac
854 '
855
856 test_lazy_prereq AUTOIDENT '
857         sane_unset GIT_AUTHOR_NAME &&
858         sane_unset GIT_AUTHOR_EMAIL &&
859         git var GIT_AUTHOR_IDENT
860 '
861
862 # When the tests are run as root, permission tests will report that
863 # things are writable when they shouldn't be.
864 test -w / || test_set_prereq SANITY
865
866 GIT_UNZIP=${GIT_UNZIP:-unzip}
867 test_lazy_prereq UNZIP '
868         "$GIT_UNZIP" -v
869         test $? -ne 127
870 '