t/test-lib.sh

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