Imported Upstream version 2.0.5
[platform/upstream/git.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 if test -n "${TEST_GIT_INDEX_VERSION:+isset}"
112 then
113         GIT_INDEX_VERSION="$TEST_GIT_INDEX_VERSION"
114         export GIT_INDEX_VERSION
115 fi
116
117 # Add libc MALLOC and MALLOC_PERTURB test
118 # only if we are not executing the test with valgrind
119 if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
120    test -n "$TEST_NO_MALLOC_CHECK"
121 then
122         setup_malloc_check () {
123                 : nothing
124         }
125         teardown_malloc_check () {
126                 : nothing
127         }
128 else
129         setup_malloc_check () {
130                 MALLOC_CHECK_=3 MALLOC_PERTURB_=165
131                 export MALLOC_CHECK_ MALLOC_PERTURB_
132         }
133         teardown_malloc_check () {
134                 unset MALLOC_CHECK_ MALLOC_PERTURB_
135         }
136 fi
137
138 # Protect ourselves from common misconfiguration to export
139 # CDPATH into the environment
140 unset CDPATH
141
142 unset GREP_OPTIONS
143 unset UNZIP
144
145 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
146 1|2|true)
147         echo "* warning: Some tests will not work if GIT_TRACE" \
148                 "is set as to trace on STDERR ! *"
149         echo "* warning: Please set GIT_TRACE to something" \
150                 "other than 1, 2 or true ! *"
151         ;;
152 esac
153
154 # Convenience
155 #
156 # A regexp to match 5 and 40 hexdigits
157 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
158 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
159
160 # Zero SHA-1
161 _z40=0000000000000000000000000000000000000000
162
163 # Line feed
164 LF='
165 '
166
167 # UTF-8 ZERO WIDTH NON-JOINER, which HFS+ ignores
168 # when case-folding filenames
169 u200c=$(printf '\342\200\214')
170
171 export _x05 _x40 _z40 LF u200c
172
173 # Each test should start with something like this, after copyright notices:
174 #
175 # test_description='Description of this test...
176 # This test checks if command xyzzy does the right thing...
177 # '
178 # . ./test-lib.sh
179 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
180                 TERM=$ORIGINAL_TERM &&
181                 export TERM &&
182                 [ -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 "$1" in
192         -d|--d|--de|--deb|--debu|--debug)
193                 debug=t; shift ;;
194         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
195                 immediate=t; shift ;;
196         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
197                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
198         -h|--h|--he|--hel|--help)
199                 help=t; shift ;;
200         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
201                 verbose=t; shift ;;
202         --verbose-only=*)
203                 verbose_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
204                 shift ;;
205         -q|--q|--qu|--qui|--quie|--quiet)
206                 # Ignore --quiet under a TAP::Harness. Saying how many tests
207                 # passed without the ok/not ok details is always an error.
208                 test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
209         --with-dashes)
210                 with_dashes=t; shift ;;
211         --no-color)
212                 color=; shift ;;
213         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
214                 valgrind=memcheck
215                 shift ;;
216         --valgrind=*)
217                 valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
218                 shift ;;
219         --valgrind-only=*)
220                 valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
221                 shift ;;
222         --tee)
223                 shift ;; # was handled already
224         --root=*)
225                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
226                 shift ;;
227         *)
228                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
229         esac
230 done
231
232 if test -n "$valgrind_only"
233 then
234         test -z "$valgrind" && valgrind=memcheck
235         test -z "$verbose" && verbose_only="$valgrind_only"
236 elif test -n "$valgrind"
237 then
238         verbose=t
239 fi
240
241 if test -n "$color"
242 then
243         say_color () {
244                 (
245                 TERM=$ORIGINAL_TERM
246                 export TERM
247                 case "$1" in
248                 error)
249                         tput bold; tput setaf 1;; # bold red
250                 skip)
251                         tput setaf 4;; # blue
252                 warn)
253                         tput setaf 3;; # brown/yellow
254                 pass)
255                         tput setaf 2;; # green
256                 info)
257                         tput setaf 6;; # cyan
258                 *)
259                         test -n "$quiet" && return;;
260                 esac
261                 shift
262                 printf "%s" "$*"
263                 tput sgr0
264                 echo
265                 )
266         }
267 else
268         say_color() {
269                 test -z "$1" && test -n "$quiet" && return
270                 shift
271                 printf "%s\n" "$*"
272         }
273 fi
274
275 error () {
276         say_color error "error: $*"
277         GIT_EXIT_OK=t
278         exit 1
279 }
280
281 say () {
282         say_color info "$*"
283 }
284
285 test "${test_description}" != "" ||
286 error "Test script did not set test_description."
287
288 if test "$help" = "t"
289 then
290         printf '%s\n' "$test_description"
291         exit 0
292 fi
293
294 exec 5>&1
295 exec 6<&0
296 if test "$verbose" = "t"
297 then
298         exec 4>&2 3>&1
299 else
300         exec 4>/dev/null 3>/dev/null
301 fi
302
303 test_failure=0
304 test_count=0
305 test_fixed=0
306 test_broken=0
307 test_success=0
308
309 test_external_has_tap=0
310
311 die () {
312         code=$?
313         if test -n "$GIT_EXIT_OK"
314         then
315                 exit $code
316         else
317                 echo >&5 "FATAL: Unexpected exit with code $code"
318                 exit 1
319         fi
320 }
321
322 GIT_EXIT_OK=
323 trap 'die' EXIT
324
325 # The user-facing functions are loaded from a separate file so that
326 # test_perf subshells can have them too
327 . "$TEST_DIRECTORY/test-lib-functions.sh"
328
329 # You are not expected to call test_ok_ and test_failure_ directly, use
330 # the test_expect_* functions instead.
331
332 test_ok_ () {
333         test_success=$(($test_success + 1))
334         say_color "" "ok $test_count - $@"
335 }
336
337 test_failure_ () {
338         test_failure=$(($test_failure + 1))
339         say_color error "not ok $test_count - $1"
340         shift
341         printf '%s\n' "$*" | sed -e 's/^/#      /'
342         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
343 }
344
345 test_known_broken_ok_ () {
346         test_fixed=$(($test_fixed+1))
347         say_color error "ok $test_count - $@ # TODO known breakage vanished"
348 }
349
350 test_known_broken_failure_ () {
351         test_broken=$(($test_broken+1))
352         say_color warn "not ok $test_count - $@ # TODO known breakage"
353 }
354
355 test_debug () {
356         test "$debug" = "" || eval "$1"
357 }
358
359 match_pattern_list () {
360         arg="$1"
361         shift
362         test -z "$*" && return 1
363         for pattern_
364         do
365                 case "$arg" in
366                 $pattern_)
367                         return 0
368                 esac
369         done
370         return 1
371 }
372
373 maybe_teardown_verbose () {
374         test -z "$verbose_only" && return
375         exec 4>/dev/null 3>/dev/null
376         verbose=
377 }
378
379 last_verbose=t
380 maybe_setup_verbose () {
381         test -z "$verbose_only" && return
382         if match_pattern_list $test_count $verbose_only
383         then
384                 exec 4>&2 3>&1
385                 # Emit a delimiting blank line when going from
386                 # non-verbose to verbose.  Within verbose mode the
387                 # delimiter is printed by test_expect_*.  The choice
388                 # of the initial $last_verbose is such that before
389                 # test 1, we do not print it.
390                 test -z "$last_verbose" && echo >&3 ""
391                 verbose=t
392         else
393                 exec 4>/dev/null 3>/dev/null
394                 verbose=
395         fi
396         last_verbose=$verbose
397 }
398
399 maybe_teardown_valgrind () {
400         test -z "$GIT_VALGRIND" && return
401         GIT_VALGRIND_ENABLED=
402 }
403
404 maybe_setup_valgrind () {
405         test -z "$GIT_VALGRIND" && return
406         if test -z "$valgrind_only"
407         then
408                 GIT_VALGRIND_ENABLED=t
409                 return
410         fi
411         GIT_VALGRIND_ENABLED=
412         if match_pattern_list $test_count $valgrind_only
413         then
414                 GIT_VALGRIND_ENABLED=t
415         fi
416 }
417
418 test_eval_ () {
419         # This is a separate function because some tests use
420         # "return" to end a test_expect_success block early.
421         eval </dev/null >&3 2>&4 "$*"
422 }
423
424 test_run_ () {
425         test_cleanup=:
426         expecting_failure=$2
427         setup_malloc_check
428         test_eval_ "$1"
429         eval_ret=$?
430         teardown_malloc_check
431
432         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
433         then
434                 setup_malloc_check
435                 test_eval_ "$test_cleanup"
436                 teardown_malloc_check
437         fi
438         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
439         then
440                 echo ""
441         fi
442         return "$eval_ret"
443 }
444
445 test_start_ () {
446         test_count=$(($test_count+1))
447         maybe_setup_verbose
448         maybe_setup_valgrind
449 }
450
451 test_finish_ () {
452         echo >&3 ""
453         maybe_teardown_valgrind
454         maybe_teardown_verbose
455 }
456
457 test_skip () {
458         to_skip=
459         if match_pattern_list $this_test.$test_count $GIT_SKIP_TESTS
460         then
461                 to_skip=t
462         fi
463         if test -z "$to_skip" && test -n "$test_prereq" &&
464            ! test_have_prereq "$test_prereq"
465         then
466                 to_skip=t
467         fi
468         case "$to_skip" in
469         t)
470                 of_prereq=
471                 if test "$missing_prereq" != "$test_prereq"
472                 then
473                         of_prereq=" of $test_prereq"
474                 fi
475
476                 say_color skip >&3 "skipping test: $@"
477                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
478                 : true
479                 ;;
480         *)
481                 false
482                 ;;
483         esac
484 }
485
486 # stub; perf-lib overrides it
487 test_at_end_hook_ () {
488         :
489 }
490
491 test_done () {
492         GIT_EXIT_OK=t
493
494         if test -z "$HARNESS_ACTIVE"
495         then
496                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
497                 mkdir -p "$test_results_dir"
498                 base=${0##*/}
499                 test_results_path="$test_results_dir/${base%.sh}-$$.counts"
500
501                 cat >>"$test_results_path" <<-EOF
502                 total $test_count
503                 success $test_success
504                 fixed $test_fixed
505                 broken $test_broken
506                 failed $test_failure
507
508                 EOF
509         fi
510
511         if test "$test_fixed" != 0
512         then
513                 say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
514         fi
515         if test "$test_broken" != 0
516         then
517                 say_color warn "# still have $test_broken known breakage(s)"
518         fi
519         if test "$test_broken" != 0 || test "$test_fixed" != 0
520         then
521                 test_remaining=$(( $test_count - $test_broken - $test_fixed ))
522                 msg="remaining $test_remaining test(s)"
523         else
524                 test_remaining=$test_count
525                 msg="$test_count test(s)"
526         fi
527         case "$test_failure" in
528         0)
529                 # Maybe print SKIP message
530                 if test -n "$skip_all" && test $test_count -gt 0
531                 then
532                         error "Can't use skip_all after running some tests"
533                 fi
534                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
535
536                 if test $test_external_has_tap -eq 0
537                 then
538                         if test $test_remaining -gt 0
539                         then
540                                 say_color pass "# passed all $msg"
541                         fi
542                         say "1..$test_count$skip_all"
543                 fi
544
545                 test -d "$remove_trash" &&
546                 cd "$(dirname "$remove_trash")" &&
547                 rm -rf "$(basename "$remove_trash")"
548
549                 test_at_end_hook_
550
551                 exit 0 ;;
552
553         *)
554                 if test $test_external_has_tap -eq 0
555                 then
556                         say_color error "# failed $test_failure among $msg"
557                         say "1..$test_count"
558                 fi
559
560                 exit 1 ;;
561
562         esac
563 }
564
565 if test -n "$valgrind"
566 then
567         make_symlink () {
568                 test -h "$2" &&
569                 test "$1" = "$(readlink "$2")" || {
570                         # be super paranoid
571                         if mkdir "$2".lock
572                         then
573                                 rm -f "$2" &&
574                                 ln -s "$1" "$2" &&
575                                 rm -r "$2".lock
576                         else
577                                 while test -d "$2".lock
578                                 do
579                                         say "Waiting for lock on $2."
580                                         sleep 1
581                                 done
582                         fi
583                 }
584         }
585
586         make_valgrind_symlink () {
587                 # handle only executables, unless they are shell libraries that
588                 # need to be in the exec-path.
589                 test -x "$1" ||
590                 test "# " = "$(head -c 2 <"$1")" ||
591                 return;
592
593                 base=$(basename "$1")
594                 symlink_target=$GIT_BUILD_DIR/$base
595                 # do not override scripts
596                 if test -x "$symlink_target" &&
597                     test ! -d "$symlink_target" &&
598                     test "#!" != "$(head -c 2 < "$symlink_target")"
599                 then
600                         symlink_target=../valgrind.sh
601                 fi
602                 case "$base" in
603                 *.sh|*.perl)
604                         symlink_target=../unprocessed-script
605                 esac
606                 # create the link, or replace it if it is out of date
607                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
608         }
609
610         # override all git executables in TEST_DIRECTORY/..
611         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
612         mkdir -p "$GIT_VALGRIND"/bin
613         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
614         do
615                 make_valgrind_symlink $file
616         done
617         # special-case the mergetools loadables
618         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
619         OLDIFS=$IFS
620         IFS=:
621         for path in $PATH
622         do
623                 ls "$path"/git-* 2> /dev/null |
624                 while read file
625                 do
626                         make_valgrind_symlink "$file"
627                 done
628         done
629         IFS=$OLDIFS
630         PATH=$GIT_VALGRIND/bin:$PATH
631         GIT_EXEC_PATH=$GIT_VALGRIND/bin
632         export GIT_VALGRIND
633         GIT_VALGRIND_MODE="$valgrind"
634         export GIT_VALGRIND_MODE
635         GIT_VALGRIND_ENABLED=t
636         test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
637         export GIT_VALGRIND_ENABLED
638 elif test -n "$GIT_TEST_INSTALLED"
639 then
640         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
641         error "Cannot run git from $GIT_TEST_INSTALLED."
642         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
643         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
644 else # normal case, use ../bin-wrappers only unless $with_dashes:
645         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
646         if ! test -x "$git_bin_dir/git"
647         then
648                 if test -z "$with_dashes"
649                 then
650                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
651                 fi
652                 with_dashes=t
653         fi
654         PATH="$git_bin_dir:$PATH"
655         GIT_EXEC_PATH=$GIT_BUILD_DIR
656         if test -n "$with_dashes"
657         then
658                 PATH="$GIT_BUILD_DIR:$PATH"
659         fi
660 fi
661 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
662 GIT_CONFIG_NOSYSTEM=1
663 GIT_ATTR_NOSYSTEM=1
664 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
665
666 if test -z "$GIT_TEST_CMP"
667 then
668         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
669         then
670                 GIT_TEST_CMP="$DIFF -c"
671         else
672                 GIT_TEST_CMP="$DIFF -u"
673         fi
674 fi
675
676 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
677 export GITPERLLIB
678 test -d "$GIT_BUILD_DIR"/templates/blt || {
679         error "You haven't built things yet, have you?"
680 }
681
682 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
683 then
684         echo >&2 'You need to build test-chmtime:'
685         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
686         exit 1
687 fi
688
689 # Test repository
690 TRASH_DIRECTORY="trash directory.$(basename "$0" .sh)"
691 test -n "$root" && TRASH_DIRECTORY="$root/$TRASH_DIRECTORY"
692 case "$TRASH_DIRECTORY" in
693 /*) ;; # absolute path is good
694  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$TRASH_DIRECTORY" ;;
695 esac
696 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
697 rm -fr "$TRASH_DIRECTORY" || {
698         GIT_EXIT_OK=t
699         echo >&5 "FATAL: Cannot prepare test area"
700         exit 1
701 }
702
703 HOME="$TRASH_DIRECTORY"
704 export HOME
705
706 if test -z "$TEST_NO_CREATE_REPO"
707 then
708         test_create_repo "$TRASH_DIRECTORY"
709 else
710         mkdir -p "$TRASH_DIRECTORY"
711 fi
712 # Use -P to resolve symlinks in our working directory so that the cwd
713 # in subprocesses like git equals our $PWD (for pathname comparisons).
714 cd -P "$TRASH_DIRECTORY" || exit 1
715
716 this_test=${0##*/}
717 this_test=${this_test%%-*}
718 if match_pattern_list "$this_test" $GIT_SKIP_TESTS
719 then
720         say_color info >&3 "skipping test $this_test altogether"
721         skip_all="skip all tests in $this_test"
722         test_done
723 fi
724
725 # Provide an implementation of the 'yes' utility
726 yes () {
727         if test $# = 0
728         then
729                 y=y
730         else
731                 y="$*"
732         fi
733
734         while echo "$y"
735         do
736                 :
737         done
738 }
739
740 # Fix some commands on Windows
741 case $(uname -s) in
742 *MINGW*)
743         # Windows has its own (incompatible) sort and find
744         sort () {
745                 /usr/bin/sort "$@"
746         }
747         find () {
748                 /usr/bin/find "$@"
749         }
750         sum () {
751                 md5sum "$@"
752         }
753         # git sees Windows-style pwd
754         pwd () {
755                 builtin pwd -W
756         }
757         # no POSIX permissions
758         # backslashes in pathspec are converted to '/'
759         # exec does not inherit the PID
760         test_set_prereq MINGW
761         test_set_prereq NOT_CYGWIN
762         test_set_prereq SED_STRIPS_CR
763         test_set_prereq GREP_STRIPS_CR
764         GIT_TEST_CMP=mingw_test_cmp
765         ;;
766 *CYGWIN*)
767         test_set_prereq POSIXPERM
768         test_set_prereq EXECKEEPSPID
769         test_set_prereq NOT_MINGW
770         test_set_prereq CYGWIN
771         test_set_prereq SED_STRIPS_CR
772         test_set_prereq GREP_STRIPS_CR
773         ;;
774 *)
775         test_set_prereq POSIXPERM
776         test_set_prereq BSLASHPSPEC
777         test_set_prereq EXECKEEPSPID
778         test_set_prereq NOT_MINGW
779         test_set_prereq NOT_CYGWIN
780         ;;
781 esac
782
783 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
784 test -z "$NO_PERL" && test_set_prereq PERL
785 test -z "$NO_PYTHON" && test_set_prereq PYTHON
786 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
787 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
788
789 # Can we rely on git's output in the C locale?
790 if test -n "$GETTEXT_POISON"
791 then
792         GIT_GETTEXT_POISON=YesPlease
793         export GIT_GETTEXT_POISON
794         test_set_prereq GETTEXT_POISON
795 else
796         test_set_prereq C_LOCALE_OUTPUT
797 fi
798
799 # Use this instead of test_cmp to compare files that contain expected and
800 # actual output from git commands that can be translated.  When running
801 # under GETTEXT_POISON this pretends that the command produced expected
802 # results.
803 test_i18ncmp () {
804         test -n "$GETTEXT_POISON" || test_cmp "$@"
805 }
806
807 # Use this instead of "grep expected-string actual" to see if the
808 # output from a git command that can be translated either contains an
809 # expected string, or does not contain an unwanted one.  When running
810 # under GETTEXT_POISON this pretends that the command produced expected
811 # results.
812 test_i18ngrep () {
813         if test -n "$GETTEXT_POISON"
814         then
815             : # pretend success
816         elif test "x!" = "x$1"
817         then
818                 shift
819                 ! grep "$@"
820         else
821                 grep "$@"
822         fi
823 }
824
825 test_lazy_prereq PIPE '
826         # test whether the filesystem supports FIFOs
827         case $(uname -s) in
828         CYGWIN*)
829                 false
830                 ;;
831         *)
832                 rm -f testfifo && mkfifo testfifo
833                 ;;
834         esac
835 '
836
837 test_lazy_prereq SYMLINKS '
838         # test whether the filesystem supports symbolic links
839         ln -s x y && test -h y
840 '
841
842 test_lazy_prereq FILEMODE '
843         test "$(git config --bool core.filemode)" = true
844 '
845
846 test_lazy_prereq CASE_INSENSITIVE_FS '
847         echo good >CamelCase &&
848         echo bad >camelcase &&
849         test "$(cat CamelCase)" != good
850 '
851
852 test_lazy_prereq UTF8_NFD_TO_NFC '
853         # check whether FS converts nfd unicode to nfc
854         auml=$(printf "\303\244")
855         aumlcdiar=$(printf "\141\314\210")
856         >"$auml" &&
857         case "$(echo *)" in
858         "$aumlcdiar")
859                 true ;;
860         *)
861                 false ;;
862         esac
863 '
864
865 test_lazy_prereq AUTOIDENT '
866         sane_unset GIT_AUTHOR_NAME &&
867         sane_unset GIT_AUTHOR_EMAIL &&
868         git var GIT_AUTHOR_IDENT
869 '
870
871 # When the tests are run as root, permission tests will report that
872 # things are writable when they shouldn't be.
873 test -w / || test_set_prereq SANITY
874
875 GIT_UNZIP=${GIT_UNZIP:-unzip}
876 test_lazy_prereq UNZIP '
877         "$GIT_UNZIP" -v
878         test $? -ne 127
879 '