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