1# Library of functions shared by all tests scripts, included by 2# test-lib.sh. 3# 4# Copyright (c) 2005 Junio C Hamano 5# 6# This program is free software: you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation, either version 2 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see http://www.gnu.org/licenses/ . 18 19# The semantics of the editor variables are that of invoking 20# sh -c "$EDITOR \"$@\"" files ... 21# 22# If our trash directory contains shell metacharacters, they will be 23# interpreted if we just set $EDITOR directly, so do a little dance with 24# environment variables to work around this. 25# 26# In particular, quoting isn't enough, as the path may contain the same quote 27# that we're using. 28test_set_editor () { 29 FAKE_EDITOR="$1" 30 export FAKE_EDITOR 31 EDITOR='"$FAKE_EDITOR"' 32 export EDITOR 33} 34 35test_set_index_version () { 36 GIT_INDEX_VERSION="$1" 37 export GIT_INDEX_VERSION 38} 39 40test_decode_color () { 41 awk ' 42 function name(n) { 43 if (n == 0) return "RESET"; 44 if (n == 1) return "BOLD"; 45 if (n == 30) return "BLACK"; 46 if (n == 31) return "RED"; 47 if (n == 32) return "GREEN"; 48 if (n == 33) return "YELLOW"; 49 if (n == 34) return "BLUE"; 50 if (n == 35) return "MAGENTA"; 51 if (n == 36) return "CYAN"; 52 if (n == 37) return "WHITE"; 53 if (n == 40) return "BLACK"; 54 if (n == 41) return "BRED"; 55 if (n == 42) return "BGREEN"; 56 if (n == 43) return "BYELLOW"; 57 if (n == 44) return "BBLUE"; 58 if (n == 45) return "BMAGENTA"; 59 if (n == 46) return "BCYAN"; 60 if (n == 47) return "BWHITE"; 61 } 62 { 63 while (match($0, /\033\[[0-9;]*m/) != 0) { 64 printf "%s<", substr($0, 1, RSTART-1); 65 codes = substr($0, RSTART+2, RLENGTH-3); 66 if (length(codes) == 0) 67 printf "%s", name(0) 68 else { 69 n = split(codes, ary, ";"); 70 sep = ""; 71 for (i = 1; i <= n; i++) { 72 printf "%s%s", sep, name(ary[i]); 73 sep = ";" 74 } 75 } 76 printf ">"; 77 $0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1); 78 } 79 print 80 } 81 ' 82} 83 84nul_to_q () { 85 perl -pe 'y/\000/Q/' 86} 87 88q_to_nul () { 89 perl -pe 'y/Q/\000/' 90} 91 92q_to_cr () { 93 tr Q '\015' 94} 95 96q_to_tab () { 97 tr Q '\011' 98} 99 100qz_to_tab_space () { 101 tr QZ '\011\040' 102} 103 104append_cr () { 105 sed -e 's/$/Q/' | tr Q '\015' 106} 107 108remove_cr () { 109 tr '\015' Q | sed -e 's/Q$//' 110} 111 112# In some bourne shell implementations, the "unset" builtin returns 113# nonzero status when a variable to be unset was not set in the first 114# place. 115# 116# Use sane_unset when that should not be considered an error. 117 118sane_unset () { 119 unset "$@" 120 return 0 121} 122 123test_tick () { 124 if test -z "${test_tick+set}" 125 then 126 test_tick=1112911993 127 else 128 test_tick=$(($test_tick + 60)) 129 fi 130 GIT_COMMITTER_DATE="$test_tick -0700" 131 GIT_AUTHOR_DATE="$test_tick -0700" 132 export GIT_COMMITTER_DATE GIT_AUTHOR_DATE 133} 134 135# Stop execution and start a shell. This is useful for debugging tests and 136# only makes sense together with "-v". 137# 138# Be sure to remove all invocations of this command before submitting. 139 140test_pause () { 141 if test "$verbose" = t; then 142 "$SHELL_PATH" <&6 >&3 2>&4 143 else 144 error >&5 "test_pause requires --verbose" 145 fi 146} 147 148# Call test_commit with the arguments "<message> [<file> [<contents> [<tag>]]]" 149# 150# This will commit a file with the given contents and the given commit 151# message, and tag the resulting commit with the given tag name. 152# 153# <file>, <contents>, and <tag> all default to <message>. 154 155test_commit () { 156 notick= && 157 signoff= && 158 while test $# != 0 159 do 160 case "$1" in 161 --notick) 162 notick=yes 163 ;; 164 --signoff) 165 signoff="$1" 166 ;; 167 *) 168 break 169 ;; 170 esac 171 shift 172 done && 173 file=${2:-"$1.t"} && 174 echo "${3-$1}" > "$file" && 175 git add "$file" && 176 if test -z "$notick" 177 then 178 test_tick 179 fi && 180 git commit $signoff -m "$1" && 181 git tag "${4:-$1}" 182} 183 184# Call test_merge with the arguments "<message> <commit>", where <commit> 185# can be a tag pointing to the commit-to-merge. 186 187test_merge () { 188 test_tick && 189 git merge -m "$1" "$2" && 190 git tag "$1" 191} 192 193# This function helps systems where core.filemode=false is set. 194# Use it instead of plain 'chmod +x' to set or unset the executable bit 195# of a file in the working directory and add it to the index. 196 197test_chmod () { 198 chmod "$@" && 199 git update-index --add "--chmod=$@" 200} 201 202# Unset a configuration variable, but don't fail if it doesn't exist. 203test_unconfig () { 204 git config --unset-all "$@" 205 config_status=$? 206 case "$config_status" in 207 5) # ok, nothing to unset 208 config_status=0 209 ;; 210 esac 211 return $config_status 212} 213 214# Set git config, automatically unsetting it after the test is over. 215test_config () { 216 test_when_finished "test_unconfig '$1'" && 217 git config "$@" 218} 219 220test_config_global () { 221 test_when_finished "test_unconfig --global '$1'" && 222 git config --global "$@" 223} 224 225write_script () { 226 { 227 echo "#!${2-"$SHELL_PATH"}" && 228 cat 229 } >"$1" && 230 chmod +x "$1" 231} 232 233# Use test_set_prereq to tell that a particular prerequisite is available. 234# The prerequisite can later be checked for in two ways: 235# 236# - Explicitly using test_have_prereq. 237# 238# - Implicitly by specifying the prerequisite tag in the calls to 239# test_expect_{success,failure,code}. 240# 241# The single parameter is the prerequisite tag (a simple word, in all 242# capital letters by convention). 243 244test_set_prereq () { 245 satisfied_prereq="$satisfied_prereq$1 " 246} 247satisfied_prereq=" " 248lazily_testable_prereq= lazily_tested_prereq= 249 250# Usage: test_lazy_prereq PREREQ 'script' 251test_lazy_prereq () { 252 lazily_testable_prereq="$lazily_testable_prereq$1 " 253 eval test_prereq_lazily_$1=\$2 254} 255 256test_run_lazy_prereq_ () { 257 script=' 258mkdir -p "$TRASH_DIRECTORY/prereq-test-dir" && 259( 260 cd "$TRASH_DIRECTORY/prereq-test-dir" &&'"$2"' 261)' 262 say >&3 "checking prerequisite: $1" 263 say >&3 "$script" 264 test_eval_ "$script" 265 eval_ret=$? 266 rm -rf "$TRASH_DIRECTORY/prereq-test-dir" 267 if test "$eval_ret" = 0; then 268 say >&3 "prerequisite $1 ok" 269 else 270 say >&3 "prerequisite $1 not satisfied" 271 fi 272 return $eval_ret 273} 274 275test_have_prereq () { 276 # prerequisites can be concatenated with ',' 277 save_IFS=$IFS 278 IFS=, 279 set -- $* 280 IFS=$save_IFS 281 282 total_prereq=0 283 ok_prereq=0 284 missing_prereq= 285 286 for prerequisite 287 do 288 case "$prerequisite" in 289 !*) 290 negative_prereq=t 291 prerequisite=${prerequisite#!} 292 ;; 293 *) 294 negative_prereq= 295 esac 296 297 case " $lazily_tested_prereq " in 298 *" $prerequisite "*) 299 ;; 300 *) 301 case " $lazily_testable_prereq " in 302 *" $prerequisite "*) 303 eval "script=\$test_prereq_lazily_$prerequisite" && 304 if test_run_lazy_prereq_ "$prerequisite" "$script" 305 then 306 test_set_prereq $prerequisite 307 fi 308 lazily_tested_prereq="$lazily_tested_prereq$prerequisite " 309 esac 310 ;; 311 esac 312 313 total_prereq=$(($total_prereq + 1)) 314 case "$satisfied_prereq" in 315 *" $prerequisite "*) 316 satisfied_this_prereq=t 317 ;; 318 *) 319 satisfied_this_prereq= 320 esac 321 322 case "$satisfied_this_prereq,$negative_prereq" in 323 t,|,t) 324 ok_prereq=$(($ok_prereq + 1)) 325 ;; 326 *) 327 # Keep a list of missing prerequisites; restore 328 # the negative marker if necessary. 329 prerequisite=${negative_prereq:+!}$prerequisite 330 if test -z "$missing_prereq" 331 then 332 missing_prereq=$prerequisite 333 else 334 missing_prereq="$prerequisite,$missing_prereq" 335 fi 336 esac 337 done 338 339 test $total_prereq = $ok_prereq 340} 341 342test_declared_prereq () { 343 case ",$test_prereq," in 344 *,$1,*) 345 return 0 346 ;; 347 esac 348 return 1 349} 350 351test_expect_failure () { 352 test_start_ 353 test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= 354 test "$#" = 2 || 355 error "bug in the test script: not 2 or 3 parameters to test-expect-failure" 356 export test_prereq 357 if ! test_skip "$@" 358 then 359 say >&3 "checking known breakage: $2" 360 if test_run_ "$2" expecting_failure 361 then 362 test_known_broken_ok_ "$1" 363 else 364 test_known_broken_failure_ "$1" 365 fi 366 fi 367 test_finish_ 368} 369 370test_expect_success () { 371 test_start_ 372 test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= 373 test "$#" = 2 || 374 error "bug in the test script: not 2 or 3 parameters to test-expect-success" 375 export test_prereq 376 if ! test_skip "$@" 377 then 378 say >&3 "expecting success: $2" 379 if test_run_ "$2" 380 then 381 test_ok_ "$1" 382 else 383 test_failure_ "$@" 384 fi 385 fi 386 test_finish_ 387} 388 389# test_external runs external test scripts that provide continuous 390# test output about their progress, and succeeds/fails on 391# zero/non-zero exit code. It outputs the test output on stdout even 392# in non-verbose mode, and announces the external script with "# run 393# <n>: ..." before running it. When providing relative paths, keep in 394# mind that all scripts run in "trash directory". 395# Usage: test_external description command arguments... 396# Example: test_external 'Perl API' perl ../path/to/test.pl 397test_external () { 398 test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq= 399 test "$#" = 3 || 400 error >&5 "bug in the test script: not 3 or 4 parameters to test_external" 401 descr="$1" 402 shift 403 export test_prereq 404 if ! test_skip "$descr" "$@" 405 then 406 # Announce the script to reduce confusion about the 407 # test output that follows. 408 say_color "" "# run $test_count: $descr ($*)" 409 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG 410 # to be able to use them in script 411 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG 412 # Run command; redirect its stderr to &4 as in 413 # test_run_, but keep its stdout on our stdout even in 414 # non-verbose mode. 415 "$@" 2>&4 416 if [ "$?" = 0 ] 417 then 418 if test $test_external_has_tap -eq 0; then 419 test_ok_ "$descr" 420 else 421 say_color "" "# test_external test $descr was ok" 422 test_success=$(($test_success + 1)) 423 fi 424 else 425 if test $test_external_has_tap -eq 0; then 426 test_failure_ "$descr" "$@" 427 else 428 say_color error "# test_external test $descr failed: $@" 429 test_failure=$(($test_failure + 1)) 430 fi 431 fi 432 fi 433} 434 435# Like test_external, but in addition tests that the command generated 436# no output on stderr. 437test_external_without_stderr () { 438 # The temporary file has no (and must have no) security 439 # implications. 440 tmp=${TMPDIR:-/tmp} 441 stderr="$tmp/git-external-stderr.$$.tmp" 442 test_external "$@" 4> "$stderr" 443 [ -f "$stderr" ] || error "Internal error: $stderr disappeared." 444 descr="no stderr: $1" 445 shift 446 say >&3 "# expecting no stderr from previous command" 447 if [ ! -s "$stderr" ]; then 448 rm "$stderr" 449 450 if test $test_external_has_tap -eq 0; then 451 test_ok_ "$descr" 452 else 453 say_color "" "# test_external_without_stderr test $descr was ok" 454 test_success=$(($test_success + 1)) 455 fi 456 else 457 if [ "$verbose" = t ]; then 458 output=`echo; echo "# Stderr is:"; cat "$stderr"` 459 else 460 output= 461 fi 462 # rm first in case test_failure exits. 463 rm "$stderr" 464 if test $test_external_has_tap -eq 0; then 465 test_failure_ "$descr" "$@" "$output" 466 else 467 say_color error "# test_external_without_stderr test $descr failed: $@: $output" 468 test_failure=$(($test_failure + 1)) 469 fi 470 fi 471} 472 473# debugging-friendly alternatives to "test [-f|-d|-e]" 474# The commands test the existence or non-existence of $1. $2 can be 475# given to provide a more precise diagnosis. 476test_path_is_file () { 477 if ! [ -f "$1" ] 478 then 479 echo "File $1 doesn't exist. $*" 480 false 481 fi 482} 483 484test_path_is_dir () { 485 if ! [ -d "$1" ] 486 then 487 echo "Directory $1 doesn't exist. $*" 488 false 489 fi 490} 491 492# Check if the directory exists and is empty as expected, barf otherwise. 493test_dir_is_empty () { 494 test_path_is_dir "$1" && 495 if test -n "$(ls -a1 "$1" | egrep -v '^\.\.?$')" 496 then 497 echo "Directory '$1' is not empty, it contains:" 498 ls -la "$1" 499 return 1 500 fi 501} 502 503test_path_is_missing () { 504 if [ -e "$1" ] 505 then 506 echo "Path exists:" 507 ls -ld "$1" 508 if [ $# -ge 1 ]; then 509 echo "$*" 510 fi 511 false 512 fi 513} 514 515# test_line_count checks that a file has the number of lines it 516# ought to. For example: 517# 518# test_expect_success 'produce exactly one line of output' ' 519# do something >output && 520# test_line_count = 1 output 521# ' 522# 523# is like "test $(wc -l <output) = 1" except that it passes the 524# output through when the number of lines is wrong. 525 526test_line_count () { 527 if test $# != 3 528 then 529 error "bug in the test script: not 3 parameters to test_line_count" 530 elif ! test $(wc -l <"$3") "$1" "$2" 531 then 532 echo "test_line_count: line count for $3 !$1 $2" 533 cat "$3" 534 return 1 535 fi 536} 537 538# This is not among top-level (test_expect_success | test_expect_failure) 539# but is a prefix that can be used in the test script, like: 540# 541# test_expect_success 'complain and die' ' 542# do something && 543# do something else && 544# test_must_fail git checkout ../outerspace 545# ' 546# 547# Writing this as "! git checkout ../outerspace" is wrong, because 548# the failure could be due to a segv. We want a controlled failure. 549 550test_must_fail () { 551 "$@" 552 exit_code=$? 553 if test $exit_code = 0; then 554 echo >&2 "test_must_fail: command succeeded: $*" 555 return 1 556 elif test $exit_code -gt 129 && test $exit_code -le 192; then 557 echo >&2 "test_must_fail: died by signal: $*" 558 return 1 559 elif test $exit_code = 127; then 560 echo >&2 "test_must_fail: command not found: $*" 561 return 1 562 elif test $exit_code = 126; then 563 echo >&2 "test_must_fail: valgrind error: $*" 564 return 1 565 fi 566 return 0 567} 568 569# Similar to test_must_fail, but tolerates success, too. This is 570# meant to be used in contexts like: 571# 572# test_expect_success 'some command works without configuration' ' 573# test_might_fail git config --unset all.configuration && 574# do something 575# ' 576# 577# Writing "git config --unset all.configuration || :" would be wrong, 578# because we want to notice if it fails due to segv. 579 580test_might_fail () { 581 "$@" 582 exit_code=$? 583 if test $exit_code -gt 129 && test $exit_code -le 192; then 584 echo >&2 "test_might_fail: died by signal: $*" 585 return 1 586 elif test $exit_code = 127; then 587 echo >&2 "test_might_fail: command not found: $*" 588 return 1 589 fi 590 return 0 591} 592 593# Similar to test_must_fail and test_might_fail, but check that a 594# given command exited with a given exit code. Meant to be used as: 595# 596# test_expect_success 'Merge with d/f conflicts' ' 597# test_expect_code 1 git merge "merge msg" B master 598# ' 599 600test_expect_code () { 601 want_code=$1 602 shift 603 "$@" 604 exit_code=$? 605 if test $exit_code = $want_code 606 then 607 return 0 608 fi 609 610 echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*" 611 return 1 612} 613 614# test_cmp is a helper function to compare actual and expected output. 615# You can use it like: 616# 617# test_expect_success 'foo works' ' 618# echo expected >expected && 619# foo >actual && 620# test_cmp expected actual 621# ' 622# 623# This could be written as either "cmp" or "diff -u", but: 624# - cmp's output is not nearly as easy to read as diff -u 625# - not all diff versions understand "-u" 626 627test_cmp() { 628 $GIT_TEST_CMP "$@" 629} 630 631# test_cmp_bin - helper to compare binary files 632 633test_cmp_bin() { 634 cmp "$@" 635} 636 637# Check if the file expected to be empty is indeed empty, and barfs 638# otherwise. 639 640test_must_be_empty () { 641 if test -s "$1" 642 then 643 echo "'$1' is not empty, it contains:" 644 cat "$1" 645 return 1 646 fi 647} 648 649# Tests that its two parameters refer to the same revision 650test_cmp_rev () { 651 git rev-parse --verify "$1" >expect.rev && 652 git rev-parse --verify "$2" >actual.rev && 653 test_cmp expect.rev actual.rev 654} 655 656# Print a sequence of numbers or letters in increasing order. This is 657# similar to GNU seq(1), but the latter might not be available 658# everywhere (and does not do letters). It may be used like: 659# 660# for i in `test_seq 100`; do 661# for j in `test_seq 10 20`; do 662# for k in `test_seq a z`; do 663# echo $i-$j-$k 664# done 665# done 666# done 667 668test_seq () { 669 case $# in 670 1) set 1 "$@" ;; 671 2) ;; 672 *) error "bug in the test script: not 1 or 2 parameters to test_seq" ;; 673 esac 674 perl -le 'print for $ARGV[0]..$ARGV[1]' -- "$@" 675} 676 677# This function can be used to schedule some commands to be run 678# unconditionally at the end of the test to restore sanity: 679# 680# test_expect_success 'test core.capslock' ' 681# git config core.capslock true && 682# test_when_finished "git config --unset core.capslock" && 683# hello world 684# ' 685# 686# That would be roughly equivalent to 687# 688# test_expect_success 'test core.capslock' ' 689# git config core.capslock true && 690# hello world 691# git config --unset core.capslock 692# ' 693# 694# except that the greeting and config --unset must both succeed for 695# the test to pass. 696# 697# Note that under --immediate mode, no clean-up is done to help diagnose 698# what went wrong. 699 700test_when_finished () { 701 test_cleanup="{ $* 702 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup" 703} 704 705# Most tests can use the created repository, but some may need to create more. 706# Usage: test_create_repo <directory> 707test_create_repo () { 708 test "$#" = 1 || 709 error "bug in the test script: not 1 parameter to test-create-repo" 710 repo="$1" 711 mkdir -p "$repo" 712 ( 713 cd "$repo" || error "Cannot setup test environment" 714 "$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 || 715 error "cannot run git init -- have you built things yet?" 716 mv .git/hooks .git/hooks-disabled 717 ) || exit 718} 719 720# This function helps on symlink challenged file systems when it is not 721# important that the file system entry is a symbolic link. 722# Use test_ln_s_add instead of "ln -s x y && git add y" to add a 723# symbolic link entry y to the index. 724 725test_ln_s_add () { 726 if test_have_prereq SYMLINKS 727 then 728 ln -s "$1" "$2" && 729 git update-index --add "$2" 730 else 731 printf '%s' "$1" >"$2" && 732 ln_s_obj=$(git hash-object -w "$2") && 733 git update-index --add --cacheinfo 120000 $ln_s_obj "$2" 734 fi 735} 736 737# This function writes out its parameters, one per line 738test_write_lines () { 739 printf "%s\n" "$@" 740} 741 742perl () { 743 command "$PERL_PATH" "$@" 744} 745 746# Is the value one of the various ways to spell a boolean true/false? 747test_normalize_bool () { 748 git -c magic.variable="$1" config --bool magic.variable 2>/dev/null 749} 750 751# Given a variable $1, normalize the value of it to one of "true", 752# "false", or "auto" and store the result to it. 753# 754# test_tristate GIT_TEST_HTTPD 755# 756# A variable set to an empty string is set to 'false'. 757# A variable set to 'false' or 'auto' keeps its value. 758# Anything else is set to 'true'. 759# An unset variable defaults to 'auto'. 760# 761# The last rule is to allow people to set the variable to an empty 762# string and export it to decline testing the particular feature 763# for versions both before and after this change. We used to treat 764# both unset and empty variable as a signal for "do not test" and 765# took any non-empty string as "please test". 766 767test_tristate () { 768 if eval "test x\"\${$1+isset}\" = xisset" 769 then 770 # explicitly set 771 eval " 772 case \"\$$1\" in 773 '') $1=false ;; 774 auto) ;; 775 *) $1=\$(test_normalize_bool \$$1 || echo true) ;; 776 esac 777 " 778 else 779 eval "$1=auto" 780 fi 781} 782 783# Exit the test suite, either by skipping all remaining tests or by 784# exiting with an error. If "$1" is "auto", we then we assume we were 785# opportunistically trying to set up some tests and we skip. If it is 786# "true", then we report a failure. 787# 788# The error/skip message should be given by $2. 789# 790test_skip_or_die () { 791 case "$1" in 792 auto) 793 skip_all=$2 794 test_done 795 ;; 796 true) 797 error "$2" 798 ;; 799 *) 800 error "BUG: test tristate is '$1' (real error: $2)" 801 esac 802} 803 804# The following mingw_* functions obey POSIX shell syntax, but are actually 805# bash scripts, and are meant to be used only with bash on Windows. 806 807# A test_cmp function that treats LF and CRLF equal and avoids to fork 808# diff when possible. 809mingw_test_cmp () { 810 # Read text into shell variables and compare them. If the results 811 # are different, use regular diff to report the difference. 812 local test_cmp_a= test_cmp_b= 813 814 # When text came from stdin (one argument is '-') we must feed it 815 # to diff. 816 local stdin_for_diff= 817 818 # Since it is difficult to detect the difference between an 819 # empty input file and a failure to read the files, we go straight 820 # to diff if one of the inputs is empty. 821 if test -s "$1" && test -s "$2" 822 then 823 # regular case: both files non-empty 824 mingw_read_file_strip_cr_ test_cmp_a <"$1" 825 mingw_read_file_strip_cr_ test_cmp_b <"$2" 826 elif test -s "$1" && test "$2" = - 827 then 828 # read 2nd file from stdin 829 mingw_read_file_strip_cr_ test_cmp_a <"$1" 830 mingw_read_file_strip_cr_ test_cmp_b 831 stdin_for_diff='<<<"$test_cmp_b"' 832 elif test "$1" = - && test -s "$2" 833 then 834 # read 1st file from stdin 835 mingw_read_file_strip_cr_ test_cmp_a 836 mingw_read_file_strip_cr_ test_cmp_b <"$2" 837 stdin_for_diff='<<<"$test_cmp_a"' 838 fi 839 test -n "$test_cmp_a" && 840 test -n "$test_cmp_b" && 841 test "$test_cmp_a" = "$test_cmp_b" || 842 eval "diff -u \"\$@\" $stdin_for_diff" 843} 844 845# $1 is the name of the shell variable to fill in 846mingw_read_file_strip_cr_ () { 847 # Read line-wise using LF as the line separator 848 # and use IFS to strip CR. 849 local line 850 while : 851 do 852 if IFS=$'\r' read -r -d $'\n' line 853 then 854 # good 855 line=$line$'\n' 856 else 857 # we get here at EOF, but also if the last line 858 # was not terminated by LF; in the latter case, 859 # some text was read 860 if test -z "$line" 861 then 862 # EOF, really 863 break 864 fi 865 fi 866 eval "$1=\$$1\$line" 867 done 868}