Merge branch 'rs/read-ref-at'
[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 $ok = join("|", qw(
85                 TRACE
86                 DEBUG
87                 USE_LOOKUP
88                 TEST
89                 .*_TEST
90                 PROVE
91                 VALGRIND
92                 UNZIP
93                 PERF_
94                 CURL_VERBOSE
95         ));
96         my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
97         print join("\n", @vars);
98 ')
99 unset XDG_CONFIG_HOME
100 unset GITPERLLIB
101 GIT_AUTHOR_EMAIL=author@example.com
102 GIT_AUTHOR_NAME='A U Thor'
103 GIT_COMMITTER_EMAIL=committer@example.com
104 GIT_COMMITTER_NAME='C O Mitter'
105 GIT_MERGE_VERBOSITY=5
106 GIT_MERGE_AUTOEDIT=no
107 export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
108 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
109 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
110 export EDITOR
111
112 if test -n "${TEST_GIT_INDEX_VERSION:+isset}"
113 then
114         GIT_INDEX_VERSION="$TEST_GIT_INDEX_VERSION"
115         export GIT_INDEX_VERSION
116 fi
117
118 # Add libc MALLOC and MALLOC_PERTURB test
119 # only if we are not executing the test with valgrind
120 if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
121    test -n "$TEST_NO_MALLOC_CHECK"
122 then
123         setup_malloc_check () {
124                 : nothing
125         }
126         teardown_malloc_check () {
127                 : nothing
128         }
129 else
130         setup_malloc_check () {
131                 MALLOC_CHECK_=3 MALLOC_PERTURB_=165
132                 export MALLOC_CHECK_ MALLOC_PERTURB_
133         }
134         teardown_malloc_check () {
135                 unset MALLOC_CHECK_ MALLOC_PERTURB_
136         }
137 fi
138
139 # Protect ourselves from common misconfiguration to export
140 # CDPATH into the environment
141 unset CDPATH
142
143 unset GREP_OPTIONS
144 unset UNZIP
145
146 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
147 1|2|true)
148         echo "* warning: Some tests will not work if GIT_TRACE" \
149                 "is set as to trace on STDERR ! *"
150         echo "* warning: Please set GIT_TRACE to something" \
151                 "other than 1, 2 or true ! *"
152         ;;
153 esac
154
155 # Convenience
156 #
157 # A regexp to match 5 and 40 hexdigits
158 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
159 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
160
161 # Zero SHA-1
162 _z40=0000000000000000000000000000000000000000
163
164 # Line feed
165 LF='
166 '
167
168 export _x05 _x40 _z40 LF
169
170 # Each test should start with something like this, after copyright notices:
171 #
172 # test_description='Description of this test...
173 # This test checks if command xyzzy does the right thing...
174 # '
175 # . ./test-lib.sh
176 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
177                 TERM=$ORIGINAL_TERM &&
178                 export TERM &&
179                 [ -t 1 ] &&
180                 tput bold >/dev/null 2>&1 &&
181                 tput setaf 1 >/dev/null 2>&1 &&
182                 tput sgr0 >/dev/null 2>&1
183         ) &&
184         color=t
185
186 while test "$#" -ne 0
187 do
188         case "$1" in
189         -d|--d|--de|--deb|--debu|--debug)
190                 debug=t; shift ;;
191         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
192                 immediate=t; shift ;;
193         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
194                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
195         -h|--h|--he|--hel|--help)
196                 help=t; shift ;;
197         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
198                 verbose=t; shift ;;
199         --verbose-only=*)
200                 verbose_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
201                 shift ;;
202         -q|--q|--qu|--qui|--quie|--quiet)
203                 # Ignore --quiet under a TAP::Harness. Saying how many tests
204                 # passed without the ok/not ok details is always an error.
205                 test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
206         --with-dashes)
207                 with_dashes=t; shift ;;
208         --no-color)
209                 color=; shift ;;
210         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
211                 valgrind=memcheck
212                 shift ;;
213         --valgrind=*)
214                 valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
215                 shift ;;
216         --valgrind-only=*)
217                 valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
218                 shift ;;
219         --tee)
220                 shift ;; # was handled already
221         --root=*)
222                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
223                 shift ;;
224         *)
225                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
226         esac
227 done
228
229 if test -n "$valgrind_only"
230 then
231         test -z "$valgrind" && valgrind=memcheck
232         test -z "$verbose" && verbose_only="$valgrind_only"
233 elif test -n "$valgrind"
234 then
235         verbose=t
236 fi
237
238 if test -n "$color"
239 then
240         say_color () {
241                 (
242                 TERM=$ORIGINAL_TERM
243                 export TERM
244                 case "$1" in
245                 error)
246                         tput bold; tput setaf 1;; # bold red
247                 skip)
248                         tput setaf 4;; # blue
249                 warn)
250                         tput setaf 3;; # brown/yellow
251                 pass)
252                         tput setaf 2;; # green
253                 info)
254                         tput setaf 6;; # cyan
255                 *)
256                         test -n "$quiet" && return;;
257                 esac
258                 shift
259                 printf "%s" "$*"
260                 tput sgr0
261                 echo
262                 )
263         }
264 else
265         say_color() {
266                 test -z "$1" && test -n "$quiet" && return
267                 shift
268                 printf "%s\n" "$*"
269         }
270 fi
271
272 error () {
273         say_color error "error: $*"
274         GIT_EXIT_OK=t
275         exit 1
276 }
277
278 say () {
279         say_color info "$*"
280 }
281
282 test "${test_description}" != "" ||
283 error "Test script did not set test_description."
284
285 if test "$help" = "t"
286 then
287         printf '%s\n' "$test_description"
288         exit 0
289 fi
290
291 exec 5>&1
292 exec 6<&0
293 if test "$verbose" = "t"
294 then
295         exec 4>&2 3>&1
296 else
297         exec 4>/dev/null 3>/dev/null
298 fi
299
300 test_failure=0
301 test_count=0
302 test_fixed=0
303 test_broken=0
304 test_success=0
305
306 test_external_has_tap=0
307
308 die () {
309         code=$?
310         if test -n "$GIT_EXIT_OK"
311         then
312                 exit $code
313         else
314                 echo >&5 "FATAL: Unexpected exit with code $code"
315                 exit 1
316         fi
317 }
318
319 GIT_EXIT_OK=
320 trap 'die' EXIT
321
322 # The user-facing functions are loaded from a separate file so that
323 # test_perf subshells can have them too
324 . "$TEST_DIRECTORY/test-lib-functions.sh"
325
326 # You are not expected to call test_ok_ and test_failure_ directly, use
327 # the test_expect_* functions instead.
328
329 test_ok_ () {
330         test_success=$(($test_success + 1))
331         say_color "" "ok $test_count - $@"
332 }
333
334 test_failure_ () {
335         test_failure=$(($test_failure + 1))
336         say_color error "not ok $test_count - $1"
337         shift
338         printf '%s\n' "$*" | sed -e 's/^/#      /'
339         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
340 }
341
342 test_known_broken_ok_ () {
343         test_fixed=$(($test_fixed+1))
344         say_color error "ok $test_count - $@ # TODO known breakage vanished"
345 }
346
347 test_known_broken_failure_ () {
348         test_broken=$(($test_broken+1))
349         say_color warn "not ok $test_count - $@ # TODO known breakage"
350 }
351
352 test_debug () {
353         test "$debug" = "" || eval "$1"
354 }
355
356 match_pattern_list () {
357         arg="$1"
358         shift
359         test -z "$*" && return 1
360         for pattern_
361         do
362                 case "$arg" in
363                 $pattern_)
364                         return 0
365                 esac
366         done
367         return 1
368 }
369
370 maybe_teardown_verbose () {
371         test -z "$verbose_only" && return
372         exec 4>/dev/null 3>/dev/null
373         verbose=
374 }
375
376 last_verbose=t
377 maybe_setup_verbose () {
378         test -z "$verbose_only" && return
379         if match_pattern_list $test_count $verbose_only
380         then
381                 exec 4>&2 3>&1
382                 # Emit a delimiting blank line when going from
383                 # non-verbose to verbose.  Within verbose mode the
384                 # delimiter is printed by test_expect_*.  The choice
385                 # of the initial $last_verbose is such that before
386                 # test 1, we do not print it.
387                 test -z "$last_verbose" && echo >&3 ""
388                 verbose=t
389         else
390                 exec 4>/dev/null 3>/dev/null
391                 verbose=
392         fi
393         last_verbose=$verbose
394 }
395
396 maybe_teardown_valgrind () {
397         test -z "$GIT_VALGRIND" && return
398         GIT_VALGRIND_ENABLED=
399 }
400
401 maybe_setup_valgrind () {
402         test -z "$GIT_VALGRIND" && return
403         if test -z "$valgrind_only"
404         then
405                 GIT_VALGRIND_ENABLED=t
406                 return
407         fi
408         GIT_VALGRIND_ENABLED=
409         if match_pattern_list $test_count $valgrind_only
410         then
411                 GIT_VALGRIND_ENABLED=t
412         fi
413 }
414
415 test_eval_ () {
416         # This is a separate function because some tests use
417         # "return" to end a test_expect_success block early.
418         eval </dev/null >&3 2>&4 "$*"
419 }
420
421 test_run_ () {
422         test_cleanup=:
423         expecting_failure=$2
424         setup_malloc_check
425         test_eval_ "$1"
426         eval_ret=$?
427         teardown_malloc_check
428
429         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
430         then
431                 setup_malloc_check
432                 test_eval_ "$test_cleanup"
433                 teardown_malloc_check
434         fi
435         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
436         then
437                 echo ""
438         fi
439         return "$eval_ret"
440 }
441
442 test_start_ () {
443         test_count=$(($test_count+1))
444         maybe_setup_verbose
445         maybe_setup_valgrind
446 }
447
448 test_finish_ () {
449         echo >&3 ""
450         maybe_teardown_valgrind
451         maybe_teardown_verbose
452 }
453
454 test_skip () {
455         to_skip=
456         if match_pattern_list $this_test.$test_count $GIT_SKIP_TESTS
457         then
458                 to_skip=t
459         fi
460         if test -z "$to_skip" && test -n "$test_prereq" &&
461            ! test_have_prereq "$test_prereq"
462         then
463                 to_skip=t
464         fi
465         case "$to_skip" in
466         t)
467                 of_prereq=
468                 if test "$missing_prereq" != "$test_prereq"
469                 then
470                         of_prereq=" of $test_prereq"
471                 fi
472
473                 say_color skip >&3 "skipping test: $@"
474                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
475                 : true
476                 ;;
477         *)
478                 false
479                 ;;
480         esac
481 }
482
483 # stub; perf-lib overrides it
484 test_at_end_hook_ () {
485         :
486 }
487
488 test_done () {
489         GIT_EXIT_OK=t
490
491         if test -z "$HARNESS_ACTIVE"
492         then
493                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
494                 mkdir -p "$test_results_dir"
495                 base=${0##*/}
496                 test_results_path="$test_results_dir/${base%.sh}-$$.counts"
497
498                 cat >>"$test_results_path" <<-EOF
499                 total $test_count
500                 success $test_success
501                 fixed $test_fixed
502                 broken $test_broken
503                 failed $test_failure
504
505                 EOF
506         fi
507
508         if test "$test_fixed" != 0
509         then
510                 say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
511         fi
512         if test "$test_broken" != 0
513         then
514                 say_color warn "# still have $test_broken known breakage(s)"
515         fi
516         if test "$test_broken" != 0 || test "$test_fixed" != 0
517         then
518                 test_remaining=$(( $test_count - $test_broken - $test_fixed ))
519                 msg="remaining $test_remaining test(s)"
520         else
521                 test_remaining=$test_count
522                 msg="$test_count test(s)"
523         fi
524         case "$test_failure" in
525         0)
526                 # Maybe print SKIP message
527                 if test -n "$skip_all" && test $test_count -gt 0
528                 then
529                         error "Can't use skip_all after running some tests"
530                 fi
531                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
532
533                 if test $test_external_has_tap -eq 0
534                 then
535                         if test $test_remaining -gt 0
536                         then
537                                 say_color pass "# passed all $msg"
538                         fi
539                         say "1..$test_count$skip_all"
540                 fi
541
542                 test -d "$remove_trash" &&
543                 cd "$(dirname "$remove_trash")" &&
544                 rm -rf "$(basename "$remove_trash")"
545
546                 test_at_end_hook_
547
548                 exit 0 ;;
549
550         *)
551                 if test $test_external_has_tap -eq 0
552                 then
553                         say_color error "# failed $test_failure among $msg"
554                         say "1..$test_count"
555                 fi
556
557                 exit 1 ;;
558
559         esac
560 }
561
562 if test -n "$valgrind"
563 then
564         make_symlink () {
565                 test -h "$2" &&
566                 test "$1" = "$(readlink "$2")" || {
567                         # be super paranoid
568                         if mkdir "$2".lock
569                         then
570                                 rm -f "$2" &&
571                                 ln -s "$1" "$2" &&
572                                 rm -r "$2".lock
573                         else
574                                 while test -d "$2".lock
575                                 do
576                                         say "Waiting for lock on $2."
577                                         sleep 1
578                                 done
579                         fi
580                 }
581         }
582
583         make_valgrind_symlink () {
584                 # handle only executables, unless they are shell libraries that
585                 # need to be in the exec-path.
586                 test -x "$1" ||
587                 test "# " = "$(head -c 2 <"$1")" ||
588                 return;
589
590                 base=$(basename "$1")
591                 symlink_target=$GIT_BUILD_DIR/$base
592                 # do not override scripts
593                 if test -x "$symlink_target" &&
594                     test ! -d "$symlink_target" &&
595                     test "#!" != "$(head -c 2 < "$symlink_target")"
596                 then
597                         symlink_target=../valgrind.sh
598                 fi
599                 case "$base" in
600                 *.sh|*.perl)
601                         symlink_target=../unprocessed-script
602                 esac
603                 # create the link, or replace it if it is out of date
604                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
605         }
606
607         # override all git executables in TEST_DIRECTORY/..
608         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
609         mkdir -p "$GIT_VALGRIND"/bin
610         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
611         do
612                 make_valgrind_symlink $file
613         done
614         # special-case the mergetools loadables
615         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
616         OLDIFS=$IFS
617         IFS=:
618         for path in $PATH
619         do
620                 ls "$path"/git-* 2> /dev/null |
621                 while read file
622                 do
623                         make_valgrind_symlink "$file"
624                 done
625         done
626         IFS=$OLDIFS
627         PATH=$GIT_VALGRIND/bin:$PATH
628         GIT_EXEC_PATH=$GIT_VALGRIND/bin
629         export GIT_VALGRIND
630         GIT_VALGRIND_MODE="$valgrind"
631         export GIT_VALGRIND_MODE
632         GIT_VALGRIND_ENABLED=t
633         test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
634         export GIT_VALGRIND_ENABLED
635 elif test -n "$GIT_TEST_INSTALLED"
636 then
637         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
638         error "Cannot run git from $GIT_TEST_INSTALLED."
639         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
640         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
641 else # normal case, use ../bin-wrappers only unless $with_dashes:
642         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
643         if ! test -x "$git_bin_dir/git"
644         then
645                 if test -z "$with_dashes"
646                 then
647                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
648                 fi
649                 with_dashes=t
650         fi
651         PATH="$git_bin_dir:$PATH"
652         GIT_EXEC_PATH=$GIT_BUILD_DIR
653         if test -n "$with_dashes"
654         then
655                 PATH="$GIT_BUILD_DIR:$PATH"
656         fi
657 fi
658 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
659 GIT_CONFIG_NOSYSTEM=1
660 GIT_ATTR_NOSYSTEM=1
661 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
662
663 if test -z "$GIT_TEST_CMP"
664 then
665         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
666         then
667                 GIT_TEST_CMP="$DIFF -c"
668         else
669                 GIT_TEST_CMP="$DIFF -u"
670         fi
671 fi
672
673 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
674 export GITPERLLIB
675 test -d "$GIT_BUILD_DIR"/templates/blt || {
676         error "You haven't built things yet, have you?"
677 }
678
679 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
680 then
681         echo >&2 'You need to build test-chmtime:'
682         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
683         exit 1
684 fi
685
686 # Test repository
687 TRASH_DIRECTORY="trash directory.$(basename "$0" .sh)"
688 test -n "$root" && TRASH_DIRECTORY="$root/$TRASH_DIRECTORY"
689 case "$TRASH_DIRECTORY" in
690 /*) ;; # absolute path is good
691  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$TRASH_DIRECTORY" ;;
692 esac
693 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
694 rm -fr "$TRASH_DIRECTORY" || {
695         GIT_EXIT_OK=t
696         echo >&5 "FATAL: Cannot prepare test area"
697         exit 1
698 }
699
700 HOME="$TRASH_DIRECTORY"
701 export HOME
702
703 if test -z "$TEST_NO_CREATE_REPO"
704 then
705         test_create_repo "$TRASH_DIRECTORY"
706 else
707         mkdir -p "$TRASH_DIRECTORY"
708 fi
709 # Use -P to resolve symlinks in our working directory so that the cwd
710 # in subprocesses like git equals our $PWD (for pathname comparisons).
711 cd -P "$TRASH_DIRECTORY" || exit 1
712
713 this_test=${0##*/}
714 this_test=${this_test%%-*}
715 if match_pattern_list "$this_test" $GIT_SKIP_TESTS
716 then
717         say_color info >&3 "skipping test $this_test altogether"
718         skip_all="skip all tests in $this_test"
719         test_done
720 fi
721
722 # Provide an implementation of the 'yes' utility
723 yes () {
724         if test $# = 0
725         then
726                 y=y
727         else
728                 y="$*"
729         fi
730
731         while echo "$y"
732         do
733                 :
734         done
735 }
736
737 # Fix some commands on Windows
738 case $(uname -s) in
739 *MINGW*)
740         # Windows has its own (incompatible) sort and find
741         sort () {
742                 /usr/bin/sort "$@"
743         }
744         find () {
745                 /usr/bin/find "$@"
746         }
747         sum () {
748                 md5sum "$@"
749         }
750         # git sees Windows-style pwd
751         pwd () {
752                 builtin pwd -W
753         }
754         # no POSIX permissions
755         # backslashes in pathspec are converted to '/'
756         # exec does not inherit the PID
757         test_set_prereq MINGW
758         test_set_prereq NOT_CYGWIN
759         test_set_prereq SED_STRIPS_CR
760         test_set_prereq GREP_STRIPS_CR
761         GIT_TEST_CMP=mingw_test_cmp
762         ;;
763 *CYGWIN*)
764         test_set_prereq POSIXPERM
765         test_set_prereq EXECKEEPSPID
766         test_set_prereq NOT_MINGW
767         test_set_prereq CYGWIN
768         test_set_prereq SED_STRIPS_CR
769         test_set_prereq GREP_STRIPS_CR
770         ;;
771 *)
772         test_set_prereq POSIXPERM
773         test_set_prereq BSLASHPSPEC
774         test_set_prereq EXECKEEPSPID
775         test_set_prereq NOT_MINGW
776         test_set_prereq NOT_CYGWIN
777         ;;
778 esac
779
780 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
781 test -z "$NO_PERL" && test_set_prereq PERL
782 test -z "$NO_PYTHON" && test_set_prereq PYTHON
783 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
784 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
785
786 # Can we rely on git's output in the C locale?
787 if test -n "$GETTEXT_POISON"
788 then
789         GIT_GETTEXT_POISON=YesPlease
790         export GIT_GETTEXT_POISON
791         test_set_prereq GETTEXT_POISON
792 else
793         test_set_prereq C_LOCALE_OUTPUT
794 fi
795
796 # Use this instead of test_cmp to compare files that contain expected and
797 # actual output from git commands that can be translated.  When running
798 # under GETTEXT_POISON this pretends that the command produced expected
799 # results.
800 test_i18ncmp () {
801         test -n "$GETTEXT_POISON" || test_cmp "$@"
802 }
803
804 # Use this instead of "grep expected-string actual" to see if the
805 # output from a git command that can be translated either contains an
806 # expected string, or does not contain an unwanted one.  When running
807 # under GETTEXT_POISON this pretends that the command produced expected
808 # results.
809 test_i18ngrep () {
810         if test -n "$GETTEXT_POISON"
811         then
812             : # pretend success
813         elif test "x!" = "x$1"
814         then
815                 shift
816                 ! grep "$@"
817         else
818                 grep "$@"
819         fi
820 }
821
822 test_lazy_prereq PIPE '
823         # test whether the filesystem supports FIFOs
824         case $(uname -s) in
825         CYGWIN*)
826                 false
827                 ;;
828         *)
829                 rm -f testfifo && mkfifo testfifo
830                 ;;
831         esac
832 '
833
834 test_lazy_prereq SYMLINKS '
835         # test whether the filesystem supports symbolic links
836         ln -s x y && test -h y
837 '
838
839 test_lazy_prereq FILEMODE '
840         test "$(git config --bool core.filemode)" = true
841 '
842
843 test_lazy_prereq CASE_INSENSITIVE_FS '
844         echo good >CamelCase &&
845         echo bad >camelcase &&
846         test "$(cat CamelCase)" != good
847 '
848
849 test_lazy_prereq UTF8_NFD_TO_NFC '
850         # check whether FS converts nfd unicode to nfc
851         auml=$(printf "\303\244")
852         aumlcdiar=$(printf "\141\314\210")
853         >"$auml" &&
854         case "$(echo *)" in
855         "$aumlcdiar")
856                 true ;;
857         *)
858                 false ;;
859         esac
860 '
861
862 test_lazy_prereq AUTOIDENT '
863         sane_unset GIT_AUTHOR_NAME &&
864         sane_unset GIT_AUTHOR_EMAIL &&
865         git var GIT_AUTHOR_IDENT
866 '
867
868 # When the tests are run as root, permission tests will report that
869 # things are writable when they shouldn't be.
870 test -w / || test_set_prereq SANITY
871
872 GIT_UNZIP=${GIT_UNZIP:-unzip}
873 test_lazy_prereq UNZIP '
874         "$GIT_UNZIP" -v
875         test $? -ne 127
876 '