Andrew's git / gitweb.git / t/test-lib.sh
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t / test-lib.shon commit Sync with 2.8.2 (cc00d9c)
   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# Test the binaries we have just built.  The tests are kept in
  19# t/ subdirectory and are run in 'trash directory' subdirectory.
  20if test -z "$TEST_DIRECTORY"
  21then
  22        # We allow tests to override this, in case they want to run tests
  23        # outside of t/, e.g. for running tests on the test library
  24        # itself.
  25        TEST_DIRECTORY=$(pwd)
  26else
  27        # ensure that TEST_DIRECTORY is an absolute path so that it
  28        # is valid even if the current working directory is changed
  29        TEST_DIRECTORY=$(cd "$TEST_DIRECTORY" && pwd) || exit 1
  30fi
  31if test -z "$TEST_OUTPUT_DIRECTORY"
  32then
  33        # Similarly, override this to store the test-results subdir
  34        # elsewhere
  35        TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
  36fi
  37GIT_BUILD_DIR="$TEST_DIRECTORY"/..
  38
  39################################################################
  40# It appears that people try to run tests without building...
  41"$GIT_BUILD_DIR/git" >/dev/null
  42if test $? != 1
  43then
  44        echo >&2 'error: you do not seem to have built git yet.'
  45        exit 1
  46fi
  47
  48. "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
  49export PERL_PATH SHELL_PATH
  50
  51# if --tee was passed, write the output not only to the terminal, but
  52# additionally to the file test-results/$BASENAME.out, too.
  53case "$GIT_TEST_TEE_STARTED, $* " in
  54done,*)
  55        # do not redirect again
  56        ;;
  57*' --tee '*|*' --va'*)
  58        mkdir -p "$TEST_OUTPUT_DIRECTORY/test-results"
  59        BASE="$TEST_OUTPUT_DIRECTORY/test-results/$(basename "$0" .sh)"
  60        (GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
  61         echo $? > $BASE.exit) | tee $BASE.out
  62        test "$(cat $BASE.exit)" = 0
  63        exit
  64        ;;
  65esac
  66
  67# For repeatability, reset the environment to known value.
  68# TERM is sanitized below, after saving color control sequences.
  69LANG=C
  70LC_ALL=C
  71PAGER=cat
  72TZ=UTC
  73export LANG LC_ALL PAGER TZ
  74EDITOR=:
  75# A call to "unset" with no arguments causes at least Solaris 10
  76# /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
  77# deriving from the command substitution clustered with the other
  78# ones.
  79unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
  80        my @env = keys %ENV;
  81        my $ok = join("|", qw(
  82                TRACE
  83                DEBUG
  84                USE_LOOKUP
  85                TEST
  86                .*_TEST
  87                PROVE
  88                VALGRIND
  89                UNZIP
  90                PERF_
  91                CURL_VERBOSE
  92        ));
  93        my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
  94        print join("\n", @vars);
  95')
  96unset XDG_CONFIG_HOME
  97unset GITPERLLIB
  98GIT_AUTHOR_EMAIL=author@example.com
  99GIT_AUTHOR_NAME='A U Thor'
 100GIT_COMMITTER_EMAIL=committer@example.com
 101GIT_COMMITTER_NAME='C O Mitter'
 102GIT_MERGE_VERBOSITY=5
 103GIT_MERGE_AUTOEDIT=no
 104export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
 105export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 106export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 107export EDITOR
 108
 109# Tests using GIT_TRACE typically don't want <timestamp> <file>:<line> output
 110GIT_TRACE_BARE=1
 111export GIT_TRACE_BARE
 112
 113if test -n "${TEST_GIT_INDEX_VERSION:+isset}"
 114then
 115        GIT_INDEX_VERSION="$TEST_GIT_INDEX_VERSION"
 116        export GIT_INDEX_VERSION
 117fi
 118
 119# Add libc MALLOC and MALLOC_PERTURB test
 120# only if we are not executing the test with valgrind
 121if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
 122   test -n "$TEST_NO_MALLOC_CHECK"
 123then
 124        setup_malloc_check () {
 125                : nothing
 126        }
 127        teardown_malloc_check () {
 128                : nothing
 129        }
 130else
 131        setup_malloc_check () {
 132                MALLOC_CHECK_=3 MALLOC_PERTURB_=165
 133                export MALLOC_CHECK_ MALLOC_PERTURB_
 134        }
 135        teardown_malloc_check () {
 136                unset MALLOC_CHECK_ MALLOC_PERTURB_
 137        }
 138fi
 139
 140: ${ASAN_OPTIONS=detect_leaks=0}
 141export ASAN_OPTIONS
 142
 143# Protect ourselves from common misconfiguration to export
 144# CDPATH into the environment
 145unset CDPATH
 146
 147unset GREP_OPTIONS
 148unset UNZIP
 149
 150case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
 1511|2|true)
 152        GIT_TRACE=4
 153        ;;
 154esac
 155
 156# Convenience
 157#
 158# A regexp to match 5 and 40 hexdigits
 159_x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 160_x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
 161
 162# Zero SHA-1
 163_z40=0000000000000000000000000000000000000000
 164
 165# Line feed
 166LF='
 167'
 168
 169# UTF-8 ZERO WIDTH NON-JOINER, which HFS+ ignores
 170# when case-folding filenames
 171u200c=$(printf '\342\200\214')
 172
 173export _x05 _x40 _z40 LF u200c
 174
 175# Each test should start with something like this, after copyright notices:
 176#
 177# test_description='Description of this test...
 178# This test checks if command xyzzy does the right thing...
 179# '
 180# . ./test-lib.sh
 181test "x$TERM" != "xdumb" && (
 182                test -t 1 &&
 183                tput bold >/dev/null 2>&1 &&
 184                tput setaf 1 >/dev/null 2>&1 &&
 185                tput sgr0 >/dev/null 2>&1
 186        ) &&
 187        color=t
 188
 189while test "$#" -ne 0
 190do
 191        case "$1" in
 192        -d|--d|--de|--deb|--debu|--debug)
 193                debug=t; shift ;;
 194        -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
 195                immediate=t; shift ;;
 196        -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 197                GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
 198        -r)
 199                shift; test "$#" -ne 0 || {
 200                        echo 'error: -r requires an argument' >&2;
 201                        exit 1;
 202                }
 203                run_list=$1; shift ;;
 204        --run=*)
 205                run_list=$(expr "z$1" : 'z[^=]*=\(.*\)'); shift ;;
 206        -h|--h|--he|--hel|--help)
 207                help=t; shift ;;
 208        -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
 209                verbose=t; shift ;;
 210        --verbose-only=*)
 211                verbose_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
 212                shift ;;
 213        -q|--q|--qu|--qui|--quie|--quiet)
 214                # Ignore --quiet under a TAP::Harness. Saying how many tests
 215                # passed without the ok/not ok details is always an error.
 216                test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
 217        --with-dashes)
 218                with_dashes=t; shift ;;
 219        --no-color)
 220                color=; shift ;;
 221        --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
 222                valgrind=memcheck
 223                shift ;;
 224        --valgrind=*)
 225                valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
 226                shift ;;
 227        --valgrind-only=*)
 228                valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
 229                shift ;;
 230        --tee)
 231                shift ;; # was handled already
 232        --root=*)
 233                root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 234                shift ;;
 235        --chain-lint)
 236                GIT_TEST_CHAIN_LINT=1
 237                shift ;;
 238        --no-chain-lint)
 239                GIT_TEST_CHAIN_LINT=0
 240                shift ;;
 241        -x)
 242                trace=t
 243                verbose=t
 244                shift ;;
 245        *)
 246                echo "error: unknown test option '$1'" >&2; exit 1 ;;
 247        esac
 248done
 249
 250if test -n "$valgrind_only"
 251then
 252        test -z "$valgrind" && valgrind=memcheck
 253        test -z "$verbose" && verbose_only="$valgrind_only"
 254elif test -n "$valgrind"
 255then
 256        verbose=t
 257fi
 258
 259if test -n "$color"
 260then
 261        # Save the color control sequences now rather than run tput
 262        # each time say_color() is called.  This is done for two
 263        # reasons:
 264        #   * TERM will be changed to dumb
 265        #   * HOME will be changed to a temporary directory and tput
 266        #     might need to read ~/.terminfo from the original HOME
 267        #     directory to get the control sequences
 268        # Note:  This approach assumes the control sequences don't end
 269        # in a newline for any terminal of interest (command
 270        # substitutions strip trailing newlines).  Given that most
 271        # (all?) terminals in common use are related to ECMA-48, this
 272        # shouldn't be a problem.
 273        say_color_error=$(tput bold; tput setaf 1) # bold red
 274        say_color_skip=$(tput setaf 4) # blue
 275        say_color_warn=$(tput setaf 3) # brown/yellow
 276        say_color_pass=$(tput setaf 2) # green
 277        say_color_info=$(tput setaf 6) # cyan
 278        say_color_reset=$(tput sgr0)
 279        say_color_="" # no formatting for normal text
 280        say_color () {
 281                test -z "$1" && test -n "$quiet" && return
 282                eval "say_color_color=\$say_color_$1"
 283                shift
 284                printf "%s\\n" "$say_color_color$*$say_color_reset"
 285        }
 286else
 287        say_color() {
 288                test -z "$1" && test -n "$quiet" && return
 289                shift
 290                printf "%s\n" "$*"
 291        }
 292fi
 293
 294TERM=dumb
 295export TERM
 296
 297error () {
 298        say_color error "error: $*"
 299        GIT_EXIT_OK=t
 300        exit 1
 301}
 302
 303say () {
 304        say_color info "$*"
 305}
 306
 307test "${test_description}" != "" ||
 308error "Test script did not set test_description."
 309
 310if test "$help" = "t"
 311then
 312        printf '%s\n' "$test_description"
 313        exit 0
 314fi
 315
 316exec 5>&1
 317exec 6<&0
 318if test "$verbose" = "t"
 319then
 320        exec 4>&2 3>&1
 321else
 322        exec 4>/dev/null 3>/dev/null
 323fi
 324
 325test_failure=0
 326test_count=0
 327test_fixed=0
 328test_broken=0
 329test_success=0
 330
 331test_external_has_tap=0
 332
 333die () {
 334        code=$?
 335        if test -n "$GIT_EXIT_OK"
 336        then
 337                exit $code
 338        else
 339                echo >&5 "FATAL: Unexpected exit with code $code"
 340                exit 1
 341        fi
 342}
 343
 344GIT_EXIT_OK=
 345trap 'die' EXIT
 346trap 'exit $?' INT
 347
 348# The user-facing functions are loaded from a separate file so that
 349# test_perf subshells can have them too
 350. "$TEST_DIRECTORY/test-lib-functions.sh"
 351
 352# You are not expected to call test_ok_ and test_failure_ directly, use
 353# the test_expect_* functions instead.
 354
 355test_ok_ () {
 356        test_success=$(($test_success + 1))
 357        say_color "" "ok $test_count - $@"
 358}
 359
 360test_failure_ () {
 361        test_failure=$(($test_failure + 1))
 362        say_color error "not ok $test_count - $1"
 363        shift
 364        printf '%s\n' "$*" | sed -e 's/^/#      /'
 365        test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 366}
 367
 368test_known_broken_ok_ () {
 369        test_fixed=$(($test_fixed+1))
 370        say_color error "ok $test_count - $@ # TODO known breakage vanished"
 371}
 372
 373test_known_broken_failure_ () {
 374        test_broken=$(($test_broken+1))
 375        say_color warn "not ok $test_count - $@ # TODO known breakage"
 376}
 377
 378test_debug () {
 379        test "$debug" = "" || eval "$1"
 380}
 381
 382match_pattern_list () {
 383        arg="$1"
 384        shift
 385        test -z "$*" && return 1
 386        for pattern_
 387        do
 388                case "$arg" in
 389                $pattern_)
 390                        return 0
 391                esac
 392        done
 393        return 1
 394}
 395
 396match_test_selector_list () {
 397        title="$1"
 398        shift
 399        arg="$1"
 400        shift
 401        test -z "$1" && return 0
 402
 403        # Both commas and whitespace are accepted as separators.
 404        OLDIFS=$IFS
 405        IFS='   ,'
 406        set -- $1
 407        IFS=$OLDIFS
 408
 409        # If the first selector is negative we include by default.
 410        include=
 411        case "$1" in
 412                !*) include=t ;;
 413        esac
 414
 415        for selector
 416        do
 417                orig_selector=$selector
 418
 419                positive=t
 420                case "$selector" in
 421                        !*)
 422                                positive=
 423                                selector=${selector##?}
 424                                ;;
 425                esac
 426
 427                test -z "$selector" && continue
 428
 429                case "$selector" in
 430                        *-*)
 431                                if expr "z${selector%%-*}" : "z[0-9]*[^0-9]" >/dev/null
 432                                then
 433                                        echo "error: $title: invalid non-numeric in range" \
 434                                                "start: '$orig_selector'" >&2
 435                                        exit 1
 436                                fi
 437                                if expr "z${selector#*-}" : "z[0-9]*[^0-9]" >/dev/null
 438                                then
 439                                        echo "error: $title: invalid non-numeric in range" \
 440                                                "end: '$orig_selector'" >&2
 441                                        exit 1
 442                                fi
 443                                ;;
 444                        *)
 445                                if expr "z$selector" : "z[0-9]*[^0-9]" >/dev/null
 446                                then
 447                                        echo "error: $title: invalid non-numeric in test" \
 448                                                "selector: '$orig_selector'" >&2
 449                                        exit 1
 450                                fi
 451                esac
 452
 453                # Short cut for "obvious" cases
 454                test -z "$include" && test -z "$positive" && continue
 455                test -n "$include" && test -n "$positive" && continue
 456
 457                case "$selector" in
 458                        -*)
 459                                if test $arg -le ${selector#-}
 460                                then
 461                                        include=$positive
 462                                fi
 463                                ;;
 464                        *-)
 465                                if test $arg -ge ${selector%-}
 466                                then
 467                                        include=$positive
 468                                fi
 469                                ;;
 470                        *-*)
 471                                if test ${selector%%-*} -le $arg \
 472                                        && test $arg -le ${selector#*-}
 473                                then
 474                                        include=$positive
 475                                fi
 476                                ;;
 477                        *)
 478                                if test $arg -eq $selector
 479                                then
 480                                        include=$positive
 481                                fi
 482                                ;;
 483                esac
 484        done
 485
 486        test -n "$include"
 487}
 488
 489maybe_teardown_verbose () {
 490        test -z "$verbose_only" && return
 491        exec 4>/dev/null 3>/dev/null
 492        verbose=
 493}
 494
 495last_verbose=t
 496maybe_setup_verbose () {
 497        test -z "$verbose_only" && return
 498        if match_pattern_list $test_count $verbose_only
 499        then
 500                exec 4>&2 3>&1
 501                # Emit a delimiting blank line when going from
 502                # non-verbose to verbose.  Within verbose mode the
 503                # delimiter is printed by test_expect_*.  The choice
 504                # of the initial $last_verbose is such that before
 505                # test 1, we do not print it.
 506                test -z "$last_verbose" && echo >&3 ""
 507                verbose=t
 508        else
 509                exec 4>/dev/null 3>/dev/null
 510                verbose=
 511        fi
 512        last_verbose=$verbose
 513}
 514
 515maybe_teardown_valgrind () {
 516        test -z "$GIT_VALGRIND" && return
 517        GIT_VALGRIND_ENABLED=
 518}
 519
 520maybe_setup_valgrind () {
 521        test -z "$GIT_VALGRIND" && return
 522        if test -z "$valgrind_only"
 523        then
 524                GIT_VALGRIND_ENABLED=t
 525                return
 526        fi
 527        GIT_VALGRIND_ENABLED=
 528        if match_pattern_list $test_count $valgrind_only
 529        then
 530                GIT_VALGRIND_ENABLED=t
 531        fi
 532}
 533
 534want_trace () {
 535        test "$trace" = t && test "$verbose" = t
 536}
 537
 538# This is a separate function because some tests use
 539# "return" to end a test_expect_success block early
 540# (and we want to make sure we run any cleanup like
 541# "set +x").
 542test_eval_inner_ () {
 543        # Do not add anything extra (including LF) after '$*'
 544        eval "
 545                want_trace && set -x
 546                $*"
 547}
 548
 549test_eval_ () {
 550        # We run this block with stderr redirected to avoid extra cruft
 551        # during a "-x" trace. Once in "set -x" mode, we cannot prevent
 552        # the shell from printing the "set +x" to turn it off (nor the saving
 553        # of $? before that). But we can make sure that the output goes to
 554        # /dev/null.
 555        #
 556        # The test itself is run with stderr put back to &4 (so either to
 557        # /dev/null, or to the original stderr if --verbose was used).
 558        {
 559                test_eval_inner_ "$@" </dev/null >&3 2>&4
 560                test_eval_ret_=$?
 561                if want_trace
 562                then
 563                        set +x
 564                        if test "$test_eval_ret_" != 0
 565                        then
 566                                say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
 567                        fi
 568                fi
 569        } 2>/dev/null
 570        return $test_eval_ret_
 571}
 572
 573test_run_ () {
 574        test_cleanup=:
 575        expecting_failure=$2
 576
 577        if test "${GIT_TEST_CHAIN_LINT:-1}" != 0; then
 578                # turn off tracing for this test-eval, as it simply creates
 579                # confusing noise in the "-x" output
 580                trace_tmp=$trace
 581                trace=
 582                # 117 is magic because it is unlikely to match the exit
 583                # code of other programs
 584                test_eval_ "(exit 117) && $1"
 585                if test "$?" != 117; then
 586                        error "bug in the test script: broken &&-chain: $1"
 587                fi
 588                trace=$trace_tmp
 589        fi
 590
 591        setup_malloc_check
 592        test_eval_ "$1"
 593        eval_ret=$?
 594        teardown_malloc_check
 595
 596        if test -z "$immediate" || test $eval_ret = 0 ||
 597           test -n "$expecting_failure" && test "$test_cleanup" != ":"
 598        then
 599                setup_malloc_check
 600                test_eval_ "$test_cleanup"
 601                teardown_malloc_check
 602        fi
 603        if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
 604        then
 605                echo ""
 606        fi
 607        return "$eval_ret"
 608}
 609
 610test_start_ () {
 611        test_count=$(($test_count+1))
 612        maybe_setup_verbose
 613        maybe_setup_valgrind
 614}
 615
 616test_finish_ () {
 617        echo >&3 ""
 618        maybe_teardown_valgrind
 619        maybe_teardown_verbose
 620}
 621
 622test_skip () {
 623        to_skip=
 624        skipped_reason=
 625        if match_pattern_list $this_test.$test_count $GIT_SKIP_TESTS
 626        then
 627                to_skip=t
 628                skipped_reason="GIT_SKIP_TESTS"
 629        fi
 630        if test -z "$to_skip" && test -n "$test_prereq" &&
 631           ! test_have_prereq "$test_prereq"
 632        then
 633                to_skip=t
 634
 635                of_prereq=
 636                if test "$missing_prereq" != "$test_prereq"
 637                then
 638                        of_prereq=" of $test_prereq"
 639                fi
 640                skipped_reason="missing $missing_prereq${of_prereq}"
 641        fi
 642        if test -z "$to_skip" && test -n "$run_list" &&
 643                ! match_test_selector_list '--run' $test_count "$run_list"
 644        then
 645                to_skip=t
 646                skipped_reason="--run"
 647        fi
 648
 649        case "$to_skip" in
 650        t)
 651                say_color skip >&3 "skipping test: $@"
 652                say_color skip "ok $test_count # skip $1 ($skipped_reason)"
 653                : true
 654                ;;
 655        *)
 656                false
 657                ;;
 658        esac
 659}
 660
 661# stub; perf-lib overrides it
 662test_at_end_hook_ () {
 663        :
 664}
 665
 666test_done () {
 667        GIT_EXIT_OK=t
 668
 669        if test -z "$HARNESS_ACTIVE"
 670        then
 671                test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
 672                mkdir -p "$test_results_dir"
 673                base=${0##*/}
 674                test_results_path="$test_results_dir/${base%.sh}-$$.counts"
 675
 676                cat >>"$test_results_path" <<-EOF
 677                total $test_count
 678                success $test_success
 679                fixed $test_fixed
 680                broken $test_broken
 681                failed $test_failure
 682
 683                EOF
 684        fi
 685
 686        if test "$test_fixed" != 0
 687        then
 688                say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
 689        fi
 690        if test "$test_broken" != 0
 691        then
 692                say_color warn "# still have $test_broken known breakage(s)"
 693        fi
 694        if test "$test_broken" != 0 || test "$test_fixed" != 0
 695        then
 696                test_remaining=$(( $test_count - $test_broken - $test_fixed ))
 697                msg="remaining $test_remaining test(s)"
 698        else
 699                test_remaining=$test_count
 700                msg="$test_count test(s)"
 701        fi
 702        case "$test_failure" in
 703        0)
 704                # Maybe print SKIP message
 705                if test -n "$skip_all" && test $test_count -gt 0
 706                then
 707                        error "Can't use skip_all after running some tests"
 708                fi
 709                test -z "$skip_all" || skip_all=" # SKIP $skip_all"
 710
 711                if test $test_external_has_tap -eq 0
 712                then
 713                        if test $test_remaining -gt 0
 714                        then
 715                                say_color pass "# passed all $msg"
 716                        fi
 717                        say "1..$test_count$skip_all"
 718                fi
 719
 720                test -d "$remove_trash" &&
 721                cd "$(dirname "$remove_trash")" &&
 722                rm -rf "$(basename "$remove_trash")"
 723
 724                test_at_end_hook_
 725
 726                exit 0 ;;
 727
 728        *)
 729                if test $test_external_has_tap -eq 0
 730                then
 731                        say_color error "# failed $test_failure among $msg"
 732                        say "1..$test_count"
 733                fi
 734
 735                exit 1 ;;
 736
 737        esac
 738}
 739
 740if test -n "$valgrind"
 741then
 742        make_symlink () {
 743                test -h "$2" &&
 744                test "$1" = "$(readlink "$2")" || {
 745                        # be super paranoid
 746                        if mkdir "$2".lock
 747                        then
 748                                rm -f "$2" &&
 749                                ln -s "$1" "$2" &&
 750                                rm -r "$2".lock
 751                        else
 752                                while test -d "$2".lock
 753                                do
 754                                        say "Waiting for lock on $2."
 755                                        sleep 1
 756                                done
 757                        fi
 758                }
 759        }
 760
 761        make_valgrind_symlink () {
 762                # handle only executables, unless they are shell libraries that
 763                # need to be in the exec-path.
 764                test -x "$1" ||
 765                test "# " = "$(head -c 2 <"$1")" ||
 766                return;
 767
 768                base=$(basename "$1")
 769                symlink_target=$GIT_BUILD_DIR/$base
 770                # do not override scripts
 771                if test -x "$symlink_target" &&
 772                    test ! -d "$symlink_target" &&
 773                    test "#!" != "$(head -c 2 < "$symlink_target")"
 774                then
 775                        symlink_target=../valgrind.sh
 776                fi
 777                case "$base" in
 778                *.sh|*.perl)
 779                        symlink_target=../unprocessed-script
 780                esac
 781                # create the link, or replace it if it is out of date
 782                make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 783        }
 784
 785        # override all git executables in TEST_DIRECTORY/..
 786        GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 787        mkdir -p "$GIT_VALGRIND"/bin
 788        for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 789        do
 790                make_valgrind_symlink $file
 791        done
 792        # special-case the mergetools loadables
 793        make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 794        OLDIFS=$IFS
 795        IFS=:
 796        for path in $PATH
 797        do
 798                ls "$path"/git-* 2> /dev/null |
 799                while read file
 800                do
 801                        make_valgrind_symlink "$file"
 802                done
 803        done
 804        IFS=$OLDIFS
 805        PATH=$GIT_VALGRIND/bin:$PATH
 806        GIT_EXEC_PATH=$GIT_VALGRIND/bin
 807        export GIT_VALGRIND
 808        GIT_VALGRIND_MODE="$valgrind"
 809        export GIT_VALGRIND_MODE
 810        GIT_VALGRIND_ENABLED=t
 811        test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
 812        export GIT_VALGRIND_ENABLED
 813elif test -n "$GIT_TEST_INSTALLED"
 814then
 815        GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 816        error "Cannot run git from $GIT_TEST_INSTALLED."
 817        PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 818        GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 819else # normal case, use ../bin-wrappers only unless $with_dashes:
 820        git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 821        if ! test -x "$git_bin_dir/git"
 822        then
 823                if test -z "$with_dashes"
 824                then
 825                        say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 826                fi
 827                with_dashes=t
 828        fi
 829        PATH="$git_bin_dir:$PATH"
 830        GIT_EXEC_PATH=$GIT_BUILD_DIR
 831        if test -n "$with_dashes"
 832        then
 833                PATH="$GIT_BUILD_DIR:$PATH"
 834        fi
 835fi
 836GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 837GIT_CONFIG_NOSYSTEM=1
 838GIT_ATTR_NOSYSTEM=1
 839export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 840
 841if test -z "$GIT_TEST_CMP"
 842then
 843        if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 844        then
 845                GIT_TEST_CMP="$DIFF -c"
 846        else
 847                GIT_TEST_CMP="$DIFF -u"
 848        fi
 849fi
 850
 851GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 852export GITPERLLIB
 853test -d "$GIT_BUILD_DIR"/templates/blt || {
 854        error "You haven't built things yet, have you?"
 855}
 856
 857if ! test -x "$GIT_BUILD_DIR"/t/helper/test-chmtime
 858then
 859        echo >&2 'You need to build test-chmtime:'
 860        echo >&2 'Run "make t/helper/test-chmtime" in the source (toplevel) directory'
 861        exit 1
 862fi
 863
 864# Test repository
 865TRASH_DIRECTORY="trash directory.$(basename "$0" .sh)"
 866test -n "$root" && TRASH_DIRECTORY="$root/$TRASH_DIRECTORY"
 867case "$TRASH_DIRECTORY" in
 868/*) ;; # absolute path is good
 869 *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$TRASH_DIRECTORY" ;;
 870esac
 871test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 872rm -fr "$TRASH_DIRECTORY" || {
 873        GIT_EXIT_OK=t
 874        echo >&5 "FATAL: Cannot prepare test area"
 875        exit 1
 876}
 877
 878HOME="$TRASH_DIRECTORY"
 879GNUPGHOME="$HOME/gnupg-home-not-used"
 880export HOME GNUPGHOME
 881
 882if test -z "$TEST_NO_CREATE_REPO"
 883then
 884        test_create_repo "$TRASH_DIRECTORY"
 885else
 886        mkdir -p "$TRASH_DIRECTORY"
 887fi
 888# Use -P to resolve symlinks in our working directory so that the cwd
 889# in subprocesses like git equals our $PWD (for pathname comparisons).
 890cd -P "$TRASH_DIRECTORY" || exit 1
 891
 892this_test=${0##*/}
 893this_test=${this_test%%-*}
 894if match_pattern_list "$this_test" $GIT_SKIP_TESTS
 895then
 896        say_color info >&3 "skipping test $this_test altogether"
 897        skip_all="skip all tests in $this_test"
 898        test_done
 899fi
 900
 901# Provide an implementation of the 'yes' utility
 902yes () {
 903        if test $# = 0
 904        then
 905                y=y
 906        else
 907                y="$*"
 908        fi
 909
 910        i=0
 911        while test $i -lt 99
 912        do
 913                echo "$y"
 914                i=$(($i+1))
 915        done
 916}
 917
 918# Fix some commands on Windows
 919case $(uname -s) in
 920*MINGW*)
 921        # Windows has its own (incompatible) sort and find
 922        sort () {
 923                /usr/bin/sort "$@"
 924        }
 925        find () {
 926                /usr/bin/find "$@"
 927        }
 928        sum () {
 929                md5sum "$@"
 930        }
 931        # git sees Windows-style pwd
 932        pwd () {
 933                builtin pwd -W
 934        }
 935        # no POSIX permissions
 936        # backslashes in pathspec are converted to '/'
 937        # exec does not inherit the PID
 938        test_set_prereq MINGW
 939        test_set_prereq NATIVE_CRLF
 940        test_set_prereq SED_STRIPS_CR
 941        test_set_prereq GREP_STRIPS_CR
 942        GIT_TEST_CMP=mingw_test_cmp
 943        ;;
 944*CYGWIN*)
 945        test_set_prereq POSIXPERM
 946        test_set_prereq EXECKEEPSPID
 947        test_set_prereq CYGWIN
 948        test_set_prereq SED_STRIPS_CR
 949        test_set_prereq GREP_STRIPS_CR
 950        ;;
 951*)
 952        test_set_prereq POSIXPERM
 953        test_set_prereq BSLASHPSPEC
 954        test_set_prereq EXECKEEPSPID
 955        ;;
 956esac
 957
 958( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 959test -z "$NO_PERL" && test_set_prereq PERL
 960test -z "$NO_PYTHON" && test_set_prereq PYTHON
 961test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
 962test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 963
 964# Can we rely on git's output in the C locale?
 965if test -n "$GETTEXT_POISON"
 966then
 967        GIT_GETTEXT_POISON=YesPlease
 968        export GIT_GETTEXT_POISON
 969        test_set_prereq GETTEXT_POISON
 970else
 971        test_set_prereq C_LOCALE_OUTPUT
 972fi
 973
 974# Use this instead of test_cmp to compare files that contain expected and
 975# actual output from git commands that can be translated.  When running
 976# under GETTEXT_POISON this pretends that the command produced expected
 977# results.
 978test_i18ncmp () {
 979        test -n "$GETTEXT_POISON" || test_cmp "$@"
 980}
 981
 982# Use this instead of "grep expected-string actual" to see if the
 983# output from a git command that can be translated either contains an
 984# expected string, or does not contain an unwanted one.  When running
 985# under GETTEXT_POISON this pretends that the command produced expected
 986# results.
 987test_i18ngrep () {
 988        if test -n "$GETTEXT_POISON"
 989        then
 990            : # pretend success
 991        elif test "x!" = "x$1"
 992        then
 993                shift
 994                ! grep "$@"
 995        else
 996                grep "$@"
 997        fi
 998}
 999
1000test_lazy_prereq PIPE '
1001        # test whether the filesystem supports FIFOs
1002        case $(uname -s) in
1003        CYGWIN*|MINGW*)
1004                false
1005                ;;
1006        *)
1007                rm -f testfifo && mkfifo testfifo
1008                ;;
1009        esac
1010'
1011
1012test_lazy_prereq SYMLINKS '
1013        # test whether the filesystem supports symbolic links
1014        ln -s x y && test -h y
1015'
1016
1017test_lazy_prereq FILEMODE '
1018        test "$(git config --bool core.filemode)" = true
1019'
1020
1021test_lazy_prereq CASE_INSENSITIVE_FS '
1022        echo good >CamelCase &&
1023        echo bad >camelcase &&
1024        test "$(cat CamelCase)" != good
1025'
1026
1027test_lazy_prereq UTF8_NFD_TO_NFC '
1028        # check whether FS converts nfd unicode to nfc
1029        auml=$(printf "\303\244")
1030        aumlcdiar=$(printf "\141\314\210")
1031        >"$auml" &&
1032        case "$(echo *)" in
1033        "$aumlcdiar")
1034                true ;;
1035        *)
1036                false ;;
1037        esac
1038'
1039
1040test_lazy_prereq AUTOIDENT '
1041        sane_unset GIT_AUTHOR_NAME &&
1042        sane_unset GIT_AUTHOR_EMAIL &&
1043        git var GIT_AUTHOR_IDENT
1044'
1045
1046test_lazy_prereq EXPENSIVE '
1047        test -n "$GIT_TEST_LONG"
1048'
1049
1050test_lazy_prereq USR_BIN_TIME '
1051        test -x /usr/bin/time
1052'
1053
1054test_lazy_prereq NOT_ROOT '
1055        uid=$(id -u) &&
1056        test "$uid" != 0
1057'
1058
1059# SANITY is about "can you correctly predict what the filesystem would
1060# do by only looking at the permission bits of the files and
1061# directories?"  A typical example of !SANITY is running the test
1062# suite as root, where a test may expect "chmod -r file && cat file"
1063# to fail because file is supposed to be unreadable after a successful
1064# chmod.  In an environment (i.e. combination of what filesystem is
1065# being used and who is running the tests) that lacks SANITY, you may
1066# be able to delete or create a file when the containing directory
1067# doesn't have write permissions, or access a file even if the
1068# containing directory doesn't have read or execute permissions.
1069
1070test_lazy_prereq SANITY '
1071        mkdir SANETESTD.1 SANETESTD.2 &&
1072
1073        chmod +w SANETESTD.1 SANETESTD.2 &&
1074        >SANETESTD.1/x 2>SANETESTD.2/x &&
1075        chmod -w SANETESTD.1 &&
1076        chmod -r SANETESTD.1/x &&
1077        chmod -rx SANETESTD.2 ||
1078        error "bug in test sript: cannot prepare SANETESTD"
1079
1080        ! test -r SANETESTD.1/x &&
1081        ! rm SANETESTD.1/x && ! test -f SANETESTD.2/x
1082        status=$?
1083
1084        chmod +rwx SANETESTD.1 SANETESTD.2 &&
1085        rm -rf SANETESTD.1 SANETESTD.2 ||
1086        error "bug in test sript: cannot clean SANETESTD"
1087        return $status
1088'
1089
1090GIT_UNZIP=${GIT_UNZIP:-unzip}
1091test_lazy_prereq UNZIP '
1092        "$GIT_UNZIP" -v
1093        test $? -ne 127
1094'
1095
1096run_with_limited_cmdline () {
1097        (ulimit -s 128 && "$@")
1098}
1099
1100test_lazy_prereq CMDLINE_LIMIT 'run_with_limited_cmdline true'