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 # if --tee was passed, write the output not only to the terminal, but
  19 # additionally to the file test-results/$BASENAME.out, too.
  20 case "$GIT_TEST_TEE_STARTED, $* " in
  21 done,*)
  22         # do not redirect again
  23         ;;
  24 *' --tee '*|*' --va'*)
  25         mkdir -p test-results
  26         BASE=test-results/$(basename "$0" .sh)
  27         (GIT_TEST_TEE_STARTED=done ${SHELL-sh} "$0" "$@" 2>&1;
  28          echo $? > $BASE.exit) | tee $BASE.out
  29         test "$(cat $BASE.exit)" = 0
  30         exit
  31         ;;
  32 esac
  33
  34 # Keep the original TERM for say_color
  35 ORIGINAL_TERM=$TERM
  36
  37 # For repeatability, reset the environment to known value.
  38 LANG=C
  39 LC_ALL=C
  40 PAGER=cat
  41 TZ=UTC
  42 TERM=dumb
  43 export LANG LC_ALL PAGER TERM TZ
  44 EDITOR=:
  45 unset VISUAL
  46 unset GIT_EDITOR
  47 unset AUTHOR_DATE
  48 unset AUTHOR_EMAIL
  49 unset AUTHOR_NAME
  50 unset COMMIT_AUTHOR_EMAIL
  51 unset COMMIT_AUTHOR_NAME
  52 unset EMAIL
  53 unset GIT_ALTERNATE_OBJECT_DIRECTORIES
  54 unset GIT_AUTHOR_DATE
  55 GIT_AUTHOR_EMAIL=author@example.com
  56 GIT_AUTHOR_NAME='A U Thor'
  57 unset GIT_COMMITTER_DATE
  58 GIT_COMMITTER_EMAIL=committer@example.com
  59 GIT_COMMITTER_NAME='C O Mitter'
  60 unset GIT_DIFF_OPTS
  61 unset GIT_DIR
  62 unset GIT_WORK_TREE
  63 unset GIT_EXTERNAL_DIFF
  64 unset GIT_INDEX_FILE
  65 unset GIT_OBJECT_DIRECTORY
  66 unset GIT_CEILING_DIRECTORIES
  67 unset SHA1_FILE_DIRECTORIES
  68 unset SHA1_FILE_DIRECTORY
  69 unset GIT_NOTES_REF
  70 unset GIT_NOTES_DISPLAY_REF
  71 unset GIT_NOTES_REWRITE_REF
  72 unset GIT_NOTES_REWRITE_MODE
  73 GIT_MERGE_VERBOSITY=5
  74 export GIT_MERGE_VERBOSITY
  75 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
  76 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
  77 export EDITOR
  78
  79 # Protect ourselves from common misconfiguration to export
  80 # CDPATH into the environment
  81 unset CDPATH
  82
  83 unset GREP_OPTIONS
  84
  85 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
  86         1|2|true)
  87                 echo "* warning: Some tests will not work if GIT_TRACE" \
  88                         "is set as to trace on STDERR ! *"
  89                 echo "* warning: Please set GIT_TRACE to something" \
  90                         "other than 1, 2 or true ! *"
  91                 ;;
  92 esac
  93
  94 # Convenience
  95 #
  96 # A regexp to match 5 and 40 hexdigits
  97 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
  98 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
  99
 100 # Each test should start with something like this, after copyright notices:
 101 #
 102 # test_description='Description of this test...
 103 # This test checks if command xyzzy does the right thing...
 104 # '
 105 # . ./test-lib.sh
 106 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
 107                 TERM=$ORIGINAL_TERM &&
 108                 export TERM &&
 109                 [ -t 1 ] &&
 110                 tput bold >/dev/null 2>&1 &&
 111                 tput setaf 1 >/dev/null 2>&1 &&
 112                 tput sgr0 >/dev/null 2>&1
 113         ) &&
 114         color=t
 115
 116 while test "$#" -ne 0
 117 do
 118         case "$1" in
 119         -d|--d|--de|--deb|--debu|--debug)
 120                 debug=t; shift ;;
 121         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
 122                 immediate=t; shift ;;
 123         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 124                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
 125         -h|--h|--he|--hel|--help)
 126                 help=t; shift ;;
 127         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
 128                 verbose=t; shift ;;
 129         -q|--q|--qu|--qui|--quie|--quiet)
 130                 quiet=t; shift ;;
 131         --with-dashes)
 132                 with_dashes=t; shift ;;
 133         --no-color)
 134                 color=; shift ;;
 135         --no-python)
 136                 # noop now...
 137                 shift ;;
 138         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
 139                 valgrind=t; verbose=t; shift ;;
 140         --tee)
 141                 shift ;; # was handled already
 142         --root=*)
 143                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 144                 shift ;;
 145         *)
 146                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
 147         esac
 148 done
 149
 150 if test -n "$color"; then
 151         say_color () {
 152                 (
 153                 TERM=$ORIGINAL_TERM
 154                 export TERM
 155                 case "$1" in
 156                         error) tput bold; tput setaf 1;; # bold red
 157                         skip)  tput bold; tput setaf 2;; # bold green
 158                         pass)  tput setaf 2;;            # green
 159                         info)  tput setaf 3;;            # brown
 160                         *) test -n "$quiet" && return;;
 161                 esac
 162                 shift
 163                 printf "%s" "$*"
 164                 tput sgr0
 165                 echo
 166                 )
 167         }
 168 else
 169         say_color() {
 170                 test -z "$1" && test -n "$quiet" && return
 171                 shift
 172                 echo "$*"
 173         }
 174 fi
 175
 176 error () {
 177         say_color error "error: $*"
 178         GIT_EXIT_OK=t
 179         exit 1
 180 }
 181
 182 say () {
 183         say_color info "$*"
 184 }
 185
 186 test "${test_description}" != "" ||
 187 error "Test script did not set test_description."
 188
 189 if test "$help" = "t"
 190 then
 191         echo "$test_description"
 192         exit 0
 193 fi
 194
 195 exec 5>&1
 196 if test "$verbose" = "t"
 197 then
 198         exec 4>&2 3>&1
 199 else
 200         exec 4>/dev/null 3>/dev/null
 201 fi
 202
 203 test_failure=0
 204 test_count=0
 205 test_fixed=0
 206 test_broken=0
 207 test_success=0
 208
 209 test_external_has_tap=0
 210
 211 die () {
 212         code=$?
 213         if test -n "$GIT_EXIT_OK"
 214         then
 215                 exit $code
 216         else
 217                 echo >&5 "FATAL: Unexpected exit with code $code"
 218                 exit 1
 219         fi
 220 }
 221
 222 GIT_EXIT_OK=
 223 trap 'die' EXIT
 224
 225 # The semantics of the editor variables are that of invoking
 226 # sh -c "$EDITOR \"$@\"" files ...
 227 #
 228 # If our trash directory contains shell metacharacters, they will be
 229 # interpreted if we just set $EDITOR directly, so do a little dance with
 230 # environment variables to work around this.
 231 #
 232 # In particular, quoting isn't enough, as the path may contain the same quote
 233 # that we're using.
 234 test_set_editor () {
 235         FAKE_EDITOR="$1"
 236         export FAKE_EDITOR
 237         EDITOR='"$FAKE_EDITOR"'
 238         export EDITOR
 239 }
 240
 241 test_decode_color () {
 242         sed     -e 's/.\[1m/<WHITE>/g' \
 243                 -e 's/.\[31m/<RED>/g' \
 244                 -e 's/.\[32m/<GREEN>/g' \
 245                 -e 's/.\[33m/<YELLOW>/g' \
 246                 -e 's/.\[34m/<BLUE>/g' \
 247                 -e 's/.\[35m/<MAGENTA>/g' \
 248                 -e 's/.\[36m/<CYAN>/g' \
 249                 -e 's/.\[m/<RESET>/g'
 250 }
 251
 252 q_to_nul () {
 253         perl -pe 'y/Q/\000/'
 254 }
 255
 256 q_to_cr () {
 257         tr Q '\015'
 258 }
 259
 260 append_cr () {
 261         sed -e 's/$/Q/' | tr Q '\015'
 262 }
 263
 264 remove_cr () {
 265         tr '\015' Q | sed -e 's/Q$//'
 266 }
 267
 268 test_tick () {
 269         if test -z "${test_tick+set}"
 270         then
 271                 test_tick=1112911993
 272         else
 273                 test_tick=$(($test_tick + 60))
 274         fi
 275         GIT_COMMITTER_DATE="$test_tick -0700"
 276         GIT_AUTHOR_DATE="$test_tick -0700"
 277         export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
 278 }
 279
 280 # Call test_commit with the arguments "<message> [<file> [<contents>]]"
 281 #
 282 # This will commit a file with the given contents and the given commit
 283 # message.  It will also add a tag with <message> as name.
 284 #
 285 # Both <file> and <contents> default to <message>.
 286
 287 test_commit () {
 288         file=${2:-"$1.t"}
 289         echo "${3-$1}" > "$file" &&
 290         git add "$file" &&
 291         test_tick &&
 292         git commit -m "$1" &&
 293         git tag "$1"
 294 }
 295
 296 # Call test_merge with the arguments "<message> <commit>", where <commit>
 297 # can be a tag pointing to the commit-to-merge.
 298
 299 test_merge () {
 300         test_tick &&
 301         git merge -m "$1" "$2" &&
 302         git tag "$1"
 303 }
 304
 305 # This function helps systems where core.filemode=false is set.
 306 # Use it instead of plain 'chmod +x' to set or unset the executable bit
 307 # of a file in the working directory and add it to the index.
 308
 309 test_chmod () {
 310         chmod "$@" &&
 311         git update-index --add "--chmod=$@"
 312 }
 313
 314 # Use test_set_prereq to tell that a particular prerequisite is available.
 315 # The prerequisite can later be checked for in two ways:
 316 #
 317 # - Explicitly using test_have_prereq.
 318 #
 319 # - Implicitly by specifying the prerequisite tag in the calls to
 320 #   test_expect_{success,failure,code}.
 321 #
 322 # The single parameter is the prerequisite tag (a simple word, in all
 323 # capital letters by convention).
 324
 325 test_set_prereq () {
 326         satisfied="$satisfied$1 "
 327 }
 328 satisfied=" "
 329
 330 test_have_prereq () {
 331         case $satisfied in
 332         *" $1 "*)
 333                 : yes, have it ;;
 334         *)
 335                 ! : nope ;;
 336         esac
 337 }
 338
 339 # You are not expected to call test_ok_ and test_failure_ directly, use
 340 # the text_expect_* functions instead.
 341
 342 test_ok_ () {
 343         test_success=$(($test_success + 1))
 344         say_color "" "ok $test_count - $@"
 345 }
 346
 347 test_failure_ () {
 348         test_failure=$(($test_failure + 1))
 349         say_color error "not ok - $test_count $1"
 350         shift
 351         echo "$@" | sed -e 's/^/#       /'
 352         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 353 }
 354
 355 test_known_broken_ok_ () {
 356         test_fixed=$(($test_fixed+1))
 357         say_color "" "ok $test_count - $@ # TODO known breakage"
 358 }
 359
 360 test_known_broken_failure_ () {
 361         test_broken=$(($test_broken+1))
 362         say_color skip "not ok $test_count - $@ # TODO known breakage"
 363 }
 364
 365 test_debug () {
 366         test "$debug" = "" || eval "$1"
 367 }
 368
 369 test_run_ () {
 370         test_cleanup=:
 371         eval >&3 2>&4 "$1"
 372         eval_ret=$?
 373         eval >&3 2>&4 "$test_cleanup"
 374         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
 375                 echo ""
 376         fi
 377         return 0
 378 }
 379
 380 test_skip () {
 381         test_count=$(($test_count+1))
 382         to_skip=
 383         for skp in $GIT_SKIP_TESTS
 384         do
 385                 case $this_test.$test_count in
 386                 $skp)
 387                         to_skip=t
 388                 esac
 389         done
 390         if test -z "$to_skip" && test -n "$prereq" &&
 391            ! test_have_prereq "$prereq"
 392         then
 393                 to_skip=t
 394         fi
 395         case "$to_skip" in
 396         t)
 397                 say_color skip >&3 "skipping test: $@"
 398                 say_color skip "ok $test_count: # skip $1"
 399                 : true
 400                 ;;
 401         *)
 402                 false
 403                 ;;
 404         esac
 405 }
 406
 407 test_expect_failure () {
 408         test "$#" = 3 && { prereq=$1; shift; } || prereq=
 409         test "$#" = 2 ||
 410         error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
 411         if ! test_skip "$@"
 412         then
 413                 say >&3 "checking known breakage: $2"
 414                 test_run_ "$2"
 415                 if [ "$?" = 0 -a "$eval_ret" = 0 ]
 416                 then
 417                         test_known_broken_ok_ "$1"
 418                 else
 419                         test_known_broken_failure_ "$1"
 420                 fi
 421         fi
 422         echo >&3 ""
 423 }
 424
 425 test_expect_success () {
 426         test "$#" = 3 && { prereq=$1; shift; } || prereq=
 427         test "$#" = 2 ||
 428         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 429         if ! test_skip "$@"
 430         then
 431                 say >&3 "expecting success: $2"
 432                 test_run_ "$2"
 433                 if [ "$?" = 0 -a "$eval_ret" = 0 ]
 434                 then
 435                         test_ok_ "$1"
 436                 else
 437                         test_failure_ "$@"
 438                 fi
 439         fi
 440         echo >&3 ""
 441 }
 442
 443 test_expect_code () {
 444         test "$#" = 4 && { prereq=$1; shift; } || prereq=
 445         test "$#" = 3 ||
 446         error "bug in the test script: not 3 or 4 parameters to test-expect-code"
 447         if ! test_skip "$@"
 448         then
 449                 say >&3 "expecting exit code $1: $3"
 450                 test_run_ "$3"
 451                 if [ "$?" = 0 -a "$eval_ret" = "$1" ]
 452                 then
 453                         test_ok_ "$2"
 454                 else
 455                         test_failure_ "$@"
 456                 fi
 457         fi
 458         echo >&3 ""
 459 }
 460
 461 # test_external runs external test scripts that provide continuous
 462 # test output about their progress, and succeeds/fails on
 463 # zero/non-zero exit code.  It outputs the test output on stdout even
 464 # in non-verbose mode, and announces the external script with "# run
 465 # <n>: ..." before running it.  When providing relative paths, keep in
 466 # mind that all scripts run in "trash directory".
 467 # Usage: test_external description command arguments...
 468 # Example: test_external 'Perl API' perl ../path/to/test.pl
 469 test_external () {
 470         test "$#" = 4 && { prereq=$1; shift; } || prereq=
 471         test "$#" = 3 ||
 472         error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
 473         descr="$1"
 474         shift
 475         if ! test_skip "$descr" "$@"
 476         then
 477                 # Announce the script to reduce confusion about the
 478                 # test output that follows.
 479                 say_color "" "# run $test_count: $descr ($*)"
 480                 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG
 481                 # to be able to use them in script
 482                 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG
 483                 # Run command; redirect its stderr to &4 as in
 484                 # test_run_, but keep its stdout on our stdout even in
 485                 # non-verbose mode.
 486                 "$@" 2>&4
 487                 if [ "$?" = 0 ]
 488                 then
 489                         if test $test_external_has_tap -eq 0; then
 490                                 test_ok_ "$descr"
 491                         else
 492                                 say_color "" "# test_external test $descr was ok"
 493                                 test_success=$(($test_success + 1))
 494                         fi
 495                 else
 496                         if test $test_external_has_tap -eq 0; then
 497                                 test_failure_ "$descr" "$@"
 498                         else
 499                                 say_color error "# test_external test $descr failed: $@"
 500                                 test_failure=$(($test_failure + 1))
 501                         fi
 502                 fi
 503         fi
 504 }
 505
 506 # Like test_external, but in addition tests that the command generated
 507 # no output on stderr.
 508 test_external_without_stderr () {
 509         # The temporary file has no (and must have no) security
 510         # implications.
 511         tmp="$TMPDIR"; if [ -z "$tmp" ]; then tmp=/tmp; fi
 512         stderr="$tmp/git-external-stderr.$$.tmp"
 513         test_external "$@" 4> "$stderr"
 514         [ -f "$stderr" ] || error "Internal error: $stderr disappeared."
 515         descr="no stderr: $1"
 516         shift
 517         say >&3 "# expecting no stderr from previous command"
 518         if [ ! -s "$stderr" ]; then
 519                 rm "$stderr"
 520
 521                 if test $test_external_has_tap -eq 0; then
 522                         test_ok_ "$descr"
 523                 else
 524                         say_color "" "# test_external_without_stderr test $descr was ok"
 525                         test_success=$(($test_success + 1))
 526                 fi
 527         else
 528                 if [ "$verbose" = t ]; then
 529                         output=`echo; echo "# Stderr is:"; cat "$stderr"`
 530                 else
 531                         output=
 532                 fi
 533                 # rm first in case test_failure exits.
 534                 rm "$stderr"
 535                 if test $test_external_has_tap -eq 0; then
 536                         test_failure_ "$descr" "$@" "$output"
 537                 else
 538                         say_color error "# test_external_without_stderr test $descr failed: $@: $output"
 539                         test_failure=$(($test_failure + 1))
 540                 fi
 541         fi
 542 }
 543
 544 # This is not among top-level (test_expect_success | test_expect_failure)
 545 # but is a prefix that can be used in the test script, like:
 546 #
 547 #       test_expect_success 'complain and die' '
 548 #           do something &&
 549 #           do something else &&
 550 #           test_must_fail git checkout ../outerspace
 551 #       '
 552 #
 553 # Writing this as "! git checkout ../outerspace" is wrong, because
 554 # the failure could be due to a segv.  We want a controlled failure.
 555
 556 test_must_fail () {
 557         "$@"
 558         test $? -gt 0 -a $? -le 129 -o $? -gt 192
 559 }
 560
 561 # Similar to test_must_fail, but tolerates success, too.  This is
 562 # meant to be used in contexts like:
 563 #
 564 #       test_expect_success 'some command works without configuration' '
 565 #               test_might_fail git config --unset all.configuration &&
 566 #               do something
 567 #       '
 568 #
 569 # Writing "git config --unset all.configuration || :" would be wrong,
 570 # because we want to notice if it fails due to segv.
 571
 572 test_might_fail () {
 573         "$@"
 574         test $? -ge 0 -a $? -le 129 -o $? -gt 192
 575 }
 576
 577 # test_cmp is a helper function to compare actual and expected output.
 578 # You can use it like:
 579 #
 580 #       test_expect_success 'foo works' '
 581 #               echo expected >expected &&
 582 #               foo >actual &&
 583 #               test_cmp expected actual
 584 #       '
 585 #
 586 # This could be written as either "cmp" or "diff -u", but:
 587 # - cmp's output is not nearly as easy to read as diff -u
 588 # - not all diff versions understand "-u"
 589
 590 test_cmp() {
 591         $GIT_TEST_CMP "$@"
 592 }
 593
 594 # This function can be used to schedule some commands to be run
 595 # unconditionally at the end of the test to restore sanity:
 596 #
 597 #       test_expect_success 'test core.capslock' '
 598 #               git config core.capslock true &&
 599 #               test_when_finished "git config --unset core.capslock" &&
 600 #               hello world
 601 #       '
 602 #
 603 # That would be roughly equivalent to
 604 #
 605 #       test_expect_success 'test core.capslock' '
 606 #               git config core.capslock true &&
 607 #               hello world
 608 #               git config --unset core.capslock
 609 #       '
 610 #
 611 # except that the greeting and config --unset must both succeed for
 612 # the test to pass.
 613
 614 test_when_finished () {
 615         test_cleanup="{ $*
 616                 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
 617 }
 618
 619 # Most tests can use the created repository, but some may need to create more.
 620 # Usage: test_create_repo <directory>
 621 test_create_repo () {
 622         test "$#" = 1 ||
 623         error "bug in the test script: not 1 parameter to test-create-repo"
 624         owd=`pwd`
 625         repo="$1"
 626         mkdir -p "$repo"
 627         cd "$repo" || error "Cannot setup test environment"
 628         "$GIT_EXEC_PATH/git-init" "--template=$TEST_DIRECTORY/../templates/blt/" >&3 2>&4 ||
 629         error "cannot run git init -- have you built things yet?"
 630         mv .git/hooks .git/hooks-disabled
 631         cd "$owd"
 632 }
 633
 634 test_done () {
 635         GIT_EXIT_OK=t
 636         test_results_dir="$TEST_DIRECTORY/test-results"
 637         mkdir -p "$test_results_dir"
 638         test_results_path="$test_results_dir/${0%.sh}-$$"
 639
 640         echo "total $test_count" >> $test_results_path
 641         echo "success $test_success" >> $test_results_path
 642         echo "fixed $test_fixed" >> $test_results_path
 643         echo "broken $test_broken" >> $test_results_path
 644         echo "failed $test_failure" >> $test_results_path
 645         echo "" >> $test_results_path
 646
 647         if test "$test_fixed" != 0
 648         then
 649                 say_color pass "# fixed $test_fixed known breakage(s)"
 650         fi
 651         if test "$test_broken" != 0
 652         then
 653                 say_color error "# still have $test_broken known breakage(s)"
 654                 msg="remaining $(($test_count-$test_broken)) test(s)"
 655         else
 656                 msg="$test_count test(s)"
 657         fi
 658         case "$test_failure" in
 659         0)
 660                 # Maybe print SKIP message
 661                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 662
 663                 if test $test_external_has_tap -eq 0; then
 664                         say_color pass "# passed all $msg"
 665                         say "1..$test_count$skip_all"
 666                 fi
 667
 668                 test -d "$remove_trash" &&
 669                 cd "$(dirname "$remove_trash")" &&
 670                 rm -rf "$(basename "$remove_trash")"
 671
 672                 exit 0 ;;
 673
 674         *)
 675                 if test $test_external_has_tap -eq 0; then
 676                         say_color error "# failed $test_failure among $msg"
 677                         say "1..$test_count"
 678                 fi
 679
 680                 exit 1 ;;
 681
 682         esac
 683 }
 684
 685 # Test the binaries we have just built.  The tests are kept in
 686 # t/ subdirectory and are run in 'trash directory' subdirectory.
 687 TEST_DIRECTORY=$(pwd)
 688 if test -n "$valgrind"
 689 then
 690         make_symlink () {
 691                 test -h "$2" &&
 692                 test "$1" = "$(readlink "$2")" || {
 693                         # be super paranoid
 694                         if mkdir "$2".lock
 695                         then
 696                                 rm -f "$2" &&
 697                                 ln -s "$1" "$2" &&
 698                                 rm -r "$2".lock
 699                         else
 700                                 while test -d "$2".lock
 701                                 do
 702                                         say "Waiting for lock on $2."
 703                                         sleep 1
 704                                 done
 705                         fi
 706                 }
 707         }
 708
 709         make_valgrind_symlink () {
 710                 # handle only executables
 711                 test -x "$1" || return
 712
 713                 base=$(basename "$1")
 714                 symlink_target=$TEST_DIRECTORY/../$base
 715                 # do not override scripts
 716                 if test -x "$symlink_target" &&
 717                     test ! -d "$symlink_target" &&
 718                     test "#!" != "$(head -c 2 < "$symlink_target")"
 719                 then
 720                         symlink_target=../valgrind.sh
 721                 fi
 722                 case "$base" in
 723                 *.sh|*.perl)
 724                         symlink_target=../unprocessed-script
 725                 esac
 726                 # create the link, or replace it if it is out of date
 727                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 728         }
 729
 730         # override all git executables in TEST_DIRECTORY/..
 731         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 732         mkdir -p "$GIT_VALGRIND"/bin
 733         for file in $TEST_DIRECTORY/../git* $TEST_DIRECTORY/../test-*
 734         do
 735                 make_valgrind_symlink $file
 736         done
 737         OLDIFS=$IFS
 738         IFS=:
 739         for path in $PATH
 740         do
 741                 ls "$path"/git-* 2> /dev/null |
 742                 while read file
 743                 do
 744                         make_valgrind_symlink "$file"
 745                 done
 746         done
 747         IFS=$OLDIFS
 748         PATH=$GIT_VALGRIND/bin:$PATH
 749         GIT_EXEC_PATH=$GIT_VALGRIND/bin
 750         export GIT_VALGRIND
 751 elif test -n "$GIT_TEST_INSTALLED" ; then
 752         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 753         error "Cannot run git from $GIT_TEST_INSTALLED."
 754         PATH=$GIT_TEST_INSTALLED:$TEST_DIRECTORY/..:$PATH
 755         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 756 else # normal case, use ../bin-wrappers only unless $with_dashes:
 757         git_bin_dir="$TEST_DIRECTORY/../bin-wrappers"
 758         if ! test -x "$git_bin_dir/git" ; then
 759                 if test -z "$with_dashes" ; then
 760                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 761                 fi
 762                 with_dashes=t
 763         fi
 764         PATH="$git_bin_dir:$PATH"
 765         GIT_EXEC_PATH=$TEST_DIRECTORY/..
 766         if test -n "$with_dashes" ; then
 767                 PATH="$TEST_DIRECTORY/..:$PATH"
 768         fi
 769 fi
 770 GIT_TEMPLATE_DIR=$(pwd)/../templates/blt
 771 unset GIT_CONFIG
 772 GIT_CONFIG_NOSYSTEM=1
 773 GIT_CONFIG_NOGLOBAL=1
 774 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_CONFIG_NOGLOBAL
 775
 776 . ../GIT-BUILD-OPTIONS
 777
 778 DIFF="${DIFF:-diff}"
 779
 780 if test -z "$GIT_TEST_CMP"
 781 then
 782         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 783         then
 784                 GIT_TEST_CMP="$DIFF -c"
 785         else
 786                 GIT_TEST_CMP="$DIFF -u"
 787         fi
 788 fi
 789
 790 GITPERLLIB=$(pwd)/../perl/blib/lib:$(pwd)/../perl/blib/arch/auto/Git
 791 export GITPERLLIB
 792 test -d ../templates/blt || {
 793         error "You haven't built things yet, have you?"
 794 }
 795
 796 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 797 then
 798         GITPYTHONLIB="$(pwd)/../git_remote_helpers/build/lib"
 799         export GITPYTHONLIB
 800         test -d ../git_remote_helpers/build || {
 801                 error "You haven't built git_remote_helpers yet, have you?"
 802         }
 803 fi
 804
 805 if ! test -x ../test-chmtime; then
 806         echo >&2 'You need to build test-chmtime:'
 807         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 808         exit 1
 809 fi
 810
 811 # Test repository
 812 test="trash directory.$(basename "$0" .sh)"
 813 test -n "$root" && test="$root/$test"
 814 case "$test" in
 815 /*) TRASH_DIRECTORY="$test" ;;
 816  *) TRASH_DIRECTORY="$TEST_DIRECTORY/$test" ;;
 817 esac
 818 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 819 rm -fr "$test" || {
 820         GIT_EXIT_OK=t
 821         echo >&5 "FATAL: Cannot prepare test area"
 822         exit 1
 823 }
 824
 825 test_create_repo "$test"
 826 # Use -P to resolve symlinks in our working directory so that the cwd
 827 # in subprocesses like git equals our $PWD (for pathname comparisons).
 828 cd -P "$test" || exit 1
 829
 830 this_test=${0##*/}
 831 this_test=${this_test%%-*}
 832 for skp in $GIT_SKIP_TESTS
 833 do
 834         to_skip=
 835         for skp in $GIT_SKIP_TESTS
 836         do
 837                 case "$this_test" in
 838                 $skp)
 839                         to_skip=t
 840                 esac
 841         done
 842         case "$to_skip" in
 843         t)
 844                 say_color skip >&3 "skipping test $this_test altogether"
 845                 say_color skip "skip all tests in $this_test"
 846                 test_done
 847         esac
 848 done
 849
 850 # Provide an implementation of the 'yes' utility
 851 yes () {
 852         if test $# = 0
 853         then
 854                 y=y
 855         else
 856                 y="$*"
 857         fi
 858
 859         while echo "$y"
 860         do
 861                 :
 862         done
 863 }
 864
 865 # Fix some commands on Windows
 866 case $(uname -s) in
 867 *MINGW*)
 868         # Windows has its own (incompatible) sort and find
 869         sort () {
 870                 /usr/bin/sort "$@"
 871         }
 872         find () {
 873                 /usr/bin/find "$@"
 874         }
 875         sum () {
 876                 md5sum "$@"
 877         }
 878         # git sees Windows-style pwd
 879         pwd () {
 880                 builtin pwd -W
 881         }
 882         # no POSIX permissions
 883         # backslashes in pathspec are converted to '/'
 884         # exec does not inherit the PID
 885         test_set_prereq MINGW
 886         ;;
 887 *)
 888         test_set_prereq POSIXPERM
 889         test_set_prereq BSLASHPSPEC
 890         test_set_prereq EXECKEEPSPID
 891         test_set_prereq NONMINGW
 892         ;;
 893 esac
 894
 895 test -z "$NO_PERL" && test_set_prereq PERL
 896 test -z "$NO_PYTHON" && test_set_prereq PYTHON
 897
 898 # test whether the filesystem supports symbolic links
 899 ln -s x y 2>/dev/null && test -h y 2>/dev/null && test_set_prereq SYMLINKS
 900 rm -f y