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git/t/test-lib-functions.sh
Junio C Hamano 571e472dc4 Merge branch 'sg/test-x'
Running test scripts under -x option of the shell is often not a
useful way to debug them, because the error messages from the
commands tests try to capture and inspect are contaminated by the
tracing output by the shell.  An earlier work done to make it more
pleasant to run tests under -x with recent versions of bash is
extended to cover posix shells that do not support BASH_XTRACEFD.

* sg/test-x:
  travis-ci: run tests with '-x' tracing
  t/README: add a note about don't saving stderr of compound commands
  t1510-repo-setup: mark as untraceable with '-x'
  t9903-bash-prompt: don't check the stderr of __git_ps1()
  t5570-git-daemon: don't check the stderr of a subshell
  t5526: use $TRASH_DIRECTORY to specify the path of GIT_TRACE log file
  t5500-fetch-pack: don't check the stderr of a subshell
  t3030-merge-recursive: don't check the stderr of a subshell
  t1507-rev-parse-upstream: don't check the stderr of a shell function
  t: add means to disable '-x' tracing for individual test scripts
  t: prevent '-x' tracing from interfering with test helpers' stderr
2018-03-14 12:01:03 -07:00

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# Library of functions shared by all tests scripts, included by
# test-lib.sh.
#
# Copyright (c) 2005 Junio C Hamano
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see http://www.gnu.org/licenses/ .
# The semantics of the editor variables are that of invoking
# sh -c "$EDITOR \"$@\"" files ...
#
# If our trash directory contains shell metacharacters, they will be
# interpreted if we just set $EDITOR directly, so do a little dance with
# environment variables to work around this.
#
# In particular, quoting isn't enough, as the path may contain the same quote
# that we're using.
test_set_editor () {
FAKE_EDITOR="$1"
export FAKE_EDITOR
EDITOR='"$FAKE_EDITOR"'
export EDITOR
}
test_set_index_version () {
GIT_INDEX_VERSION="$1"
export GIT_INDEX_VERSION
}
test_decode_color () {
awk '
function name(n) {
if (n == 0) return "RESET";
if (n == 1) return "BOLD";
if (n == 7) return "REVERSE";
if (n == 30) return "BLACK";
if (n == 31) return "RED";
if (n == 32) return "GREEN";
if (n == 33) return "YELLOW";
if (n == 34) return "BLUE";
if (n == 35) return "MAGENTA";
if (n == 36) return "CYAN";
if (n == 37) return "WHITE";
if (n == 40) return "BLACK";
if (n == 41) return "BRED";
if (n == 42) return "BGREEN";
if (n == 43) return "BYELLOW";
if (n == 44) return "BBLUE";
if (n == 45) return "BMAGENTA";
if (n == 46) return "BCYAN";
if (n == 47) return "BWHITE";
}
{
while (match($0, /\033\[[0-9;]*m/) != 0) {
printf "%s<", substr($0, 1, RSTART-1);
codes = substr($0, RSTART+2, RLENGTH-3);
if (length(codes) == 0)
printf "%s", name(0)
else {
n = split(codes, ary, ";");
sep = "";
for (i = 1; i <= n; i++) {
printf "%s%s", sep, name(ary[i]);
sep = ";"
}
}
printf ">";
$0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1);
}
print
}
'
}
lf_to_nul () {
perl -pe 'y/\012/\000/'
}
nul_to_q () {
perl -pe 'y/\000/Q/'
}
q_to_nul () {
perl -pe 'y/Q/\000/'
}
q_to_cr () {
tr Q '\015'
}
q_to_tab () {
tr Q '\011'
}
qz_to_tab_space () {
tr QZ '\011\040'
}
append_cr () {
sed -e 's/$/Q/' | tr Q '\015'
}
remove_cr () {
tr '\015' Q | sed -e 's/Q$//'
}
# In some bourne shell implementations, the "unset" builtin returns
# nonzero status when a variable to be unset was not set in the first
# place.
#
# Use sane_unset when that should not be considered an error.
sane_unset () {
unset "$@"
return 0
}
test_tick () {
if test -z "${test_tick+set}"
then
test_tick=1112911993
else
test_tick=$(($test_tick + 60))
fi
GIT_COMMITTER_DATE="$test_tick -0700"
GIT_AUTHOR_DATE="$test_tick -0700"
export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
}
# Stop execution and start a shell. This is useful for debugging tests.
#
# Be sure to remove all invocations of this command before submitting.
test_pause () {
"$SHELL_PATH" <&6 >&5 2>&7
}
# Wrap git in gdb. Adding this to a command can make it easier to
# understand what is going on in a failing test.
#
# Example: "debug git checkout master".
debug () {
GIT_TEST_GDB=1 "$@" <&6 >&5 2>&7
}
# Call test_commit with the arguments
# [-C <directory>] <message> [<file> [<contents> [<tag>]]]"
#
# This will commit a file with the given contents and the given commit
# message, and tag the resulting commit with the given tag name.
#
# <file>, <contents>, and <tag> all default to <message>.
#
# If the first argument is "-C", the second argument is used as a path for
# the git invocations.
test_commit () {
notick= &&
signoff= &&
indir= &&
while test $# != 0
do
case "$1" in
--notick)
notick=yes
;;
--signoff)
signoff="$1"
;;
-C)
indir="$2"
shift
;;
*)
break
;;
esac
shift
done &&
indir=${indir:+"$indir"/} &&
file=${2:-"$1.t"} &&
echo "${3-$1}" > "$indir$file" &&
git ${indir:+ -C "$indir"} add "$file" &&
if test -z "$notick"
then
test_tick
fi &&
git ${indir:+ -C "$indir"} commit $signoff -m "$1" &&
git ${indir:+ -C "$indir"} tag "${4:-$1}"
}
# Call test_merge with the arguments "<message> <commit>", where <commit>
# can be a tag pointing to the commit-to-merge.
test_merge () {
test_tick &&
git merge -m "$1" "$2" &&
git tag "$1"
}
# This function helps systems where core.filemode=false is set.
# Use it instead of plain 'chmod +x' to set or unset the executable bit
# of a file in the working directory and add it to the index.
test_chmod () {
chmod "$@" &&
git update-index --add "--chmod=$@"
}
# Get the modebits from a file.
test_modebits () {
ls -l "$1" | sed -e 's|^\(..........\).*|\1|'
}
# Unset a configuration variable, but don't fail if it doesn't exist.
test_unconfig () {
config_dir=
if test "$1" = -C
then
shift
config_dir=$1
shift
fi
git ${config_dir:+-C "$config_dir"} config --unset-all "$@"
config_status=$?
case "$config_status" in
5) # ok, nothing to unset
config_status=0
;;
esac
return $config_status
}
# Set git config, automatically unsetting it after the test is over.
test_config () {
config_dir=
if test "$1" = -C
then
shift
config_dir=$1
shift
fi
test_when_finished "test_unconfig ${config_dir:+-C '$config_dir'} '$1'" &&
git ${config_dir:+-C "$config_dir"} config "$@"
}
test_config_global () {
test_when_finished "test_unconfig --global '$1'" &&
git config --global "$@"
}
write_script () {
{
echo "#!${2-"$SHELL_PATH"}" &&
cat
} >"$1" &&
chmod +x "$1"
}
# Use test_set_prereq to tell that a particular prerequisite is available.
# The prerequisite can later be checked for in two ways:
#
# - Explicitly using test_have_prereq.
#
# - Implicitly by specifying the prerequisite tag in the calls to
# test_expect_{success,failure,code}.
#
# The single parameter is the prerequisite tag (a simple word, in all
# capital letters by convention).
test_set_prereq () {
satisfied_prereq="$satisfied_prereq$1 "
}
satisfied_prereq=" "
lazily_testable_prereq= lazily_tested_prereq=
# Usage: test_lazy_prereq PREREQ 'script'
test_lazy_prereq () {
lazily_testable_prereq="$lazily_testable_prereq$1 "
eval test_prereq_lazily_$1=\$2
}
test_run_lazy_prereq_ () {
script='
mkdir -p "$TRASH_DIRECTORY/prereq-test-dir" &&
(
cd "$TRASH_DIRECTORY/prereq-test-dir" &&'"$2"'
)'
say >&3 "checking prerequisite: $1"
say >&3 "$script"
test_eval_ "$script"
eval_ret=$?
rm -rf "$TRASH_DIRECTORY/prereq-test-dir"
if test "$eval_ret" = 0; then
say >&3 "prerequisite $1 ok"
else
say >&3 "prerequisite $1 not satisfied"
fi
return $eval_ret
}
test_have_prereq () {
# prerequisites can be concatenated with ','
save_IFS=$IFS
IFS=,
set -- $*
IFS=$save_IFS
total_prereq=0
ok_prereq=0
missing_prereq=
for prerequisite
do
case "$prerequisite" in
!*)
negative_prereq=t
prerequisite=${prerequisite#!}
;;
*)
negative_prereq=
esac
case " $lazily_tested_prereq " in
*" $prerequisite "*)
;;
*)
case " $lazily_testable_prereq " in
*" $prerequisite "*)
eval "script=\$test_prereq_lazily_$prerequisite" &&
if test_run_lazy_prereq_ "$prerequisite" "$script"
then
test_set_prereq $prerequisite
fi
lazily_tested_prereq="$lazily_tested_prereq$prerequisite "
esac
;;
esac
total_prereq=$(($total_prereq + 1))
case "$satisfied_prereq" in
*" $prerequisite "*)
satisfied_this_prereq=t
;;
*)
satisfied_this_prereq=
esac
case "$satisfied_this_prereq,$negative_prereq" in
t,|,t)
ok_prereq=$(($ok_prereq + 1))
;;
*)
# Keep a list of missing prerequisites; restore
# the negative marker if necessary.
prerequisite=${negative_prereq:+!}$prerequisite
if test -z "$missing_prereq"
then
missing_prereq=$prerequisite
else
missing_prereq="$prerequisite,$missing_prereq"
fi
esac
done
test $total_prereq = $ok_prereq
}
test_declared_prereq () {
case ",$test_prereq," in
*,$1,*)
return 0
;;
esac
return 1
}
test_verify_prereq () {
test -z "$test_prereq" ||
expr >/dev/null "$test_prereq" : '[A-Z0-9_,!]*$' ||
error "bug in the test script: '$test_prereq' does not look like a prereq"
}
test_expect_failure () {
test_start_
test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
test "$#" = 2 ||
error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
test_verify_prereq
export test_prereq
if ! test_skip "$@"
then
say >&3 "checking known breakage: $2"
if test_run_ "$2" expecting_failure
then
test_known_broken_ok_ "$1"
else
test_known_broken_failure_ "$1"
fi
fi
test_finish_
}
test_expect_success () {
test_start_
test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
test "$#" = 2 ||
error "bug in the test script: not 2 or 3 parameters to test-expect-success"
test_verify_prereq
export test_prereq
if ! test_skip "$@"
then
say >&3 "expecting success: $2"
if test_run_ "$2"
then
test_ok_ "$1"
else
test_failure_ "$@"
fi
fi
test_finish_
}
# test_external runs external test scripts that provide continuous
# test output about their progress, and succeeds/fails on
# zero/non-zero exit code. It outputs the test output on stdout even
# in non-verbose mode, and announces the external script with "# run
# <n>: ..." before running it. When providing relative paths, keep in
# mind that all scripts run in "trash directory".
# Usage: test_external description command arguments...
# Example: test_external 'Perl API' perl ../path/to/test.pl
test_external () {
test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq=
test "$#" = 3 ||
error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
descr="$1"
shift
test_verify_prereq
export test_prereq
if ! test_skip "$descr" "$@"
then
# Announce the script to reduce confusion about the
# test output that follows.
say_color "" "# run $test_count: $descr ($*)"
# Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG
# to be able to use them in script
export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG
# Run command; redirect its stderr to &4 as in
# test_run_, but keep its stdout on our stdout even in
# non-verbose mode.
"$@" 2>&4
if test "$?" = 0
then
if test $test_external_has_tap -eq 0; then
test_ok_ "$descr"
else
say_color "" "# test_external test $descr was ok"
test_success=$(($test_success + 1))
fi
else
if test $test_external_has_tap -eq 0; then
test_failure_ "$descr" "$@"
else
say_color error "# test_external test $descr failed: $@"
test_failure=$(($test_failure + 1))
fi
fi
fi
}
# Like test_external, but in addition tests that the command generated
# no output on stderr.
test_external_without_stderr () {
# The temporary file has no (and must have no) security
# implications.
tmp=${TMPDIR:-/tmp}
stderr="$tmp/git-external-stderr.$$.tmp"
test_external "$@" 4> "$stderr"
test -f "$stderr" || error "Internal error: $stderr disappeared."
descr="no stderr: $1"
shift
say >&3 "# expecting no stderr from previous command"
if test ! -s "$stderr"
then
rm "$stderr"
if test $test_external_has_tap -eq 0; then
test_ok_ "$descr"
else
say_color "" "# test_external_without_stderr test $descr was ok"
test_success=$(($test_success + 1))
fi
else
if test "$verbose" = t
then
output=$(echo; echo "# Stderr is:"; cat "$stderr")
else
output=
fi
# rm first in case test_failure exits.
rm "$stderr"
if test $test_external_has_tap -eq 0; then
test_failure_ "$descr" "$@" "$output"
else
say_color error "# test_external_without_stderr test $descr failed: $@: $output"
test_failure=$(($test_failure + 1))
fi
fi
}
# debugging-friendly alternatives to "test [-f|-d|-e]"
# The commands test the existence or non-existence of $1. $2 can be
# given to provide a more precise diagnosis.
test_path_is_file () {
if ! test -f "$1"
then
echo "File $1 doesn't exist. $2"
false
fi
}
test_path_is_dir () {
if ! test -d "$1"
then
echo "Directory $1 doesn't exist. $2"
false
fi
}
# Check if the directory exists and is empty as expected, barf otherwise.
test_dir_is_empty () {
test_path_is_dir "$1" &&
if test -n "$(ls -a1 "$1" | egrep -v '^\.\.?$')"
then
echo "Directory '$1' is not empty, it contains:"
ls -la "$1"
return 1
fi
}
test_path_is_missing () {
if test -e "$1"
then
echo "Path exists:"
ls -ld "$1"
if test $# -ge 1
then
echo "$*"
fi
false
fi
}
# test_line_count checks that a file has the number of lines it
# ought to. For example:
#
# test_expect_success 'produce exactly one line of output' '
# do something >output &&
# test_line_count = 1 output
# '
#
# is like "test $(wc -l <output) = 1" except that it passes the
# output through when the number of lines is wrong.
test_line_count () {
if test $# != 3
then
error "bug in the test script: not 3 parameters to test_line_count"
elif ! test $(wc -l <"$3") "$1" "$2"
then
echo "test_line_count: line count for $3 !$1 $2"
cat "$3"
return 1
fi
}
# Returns success if a comma separated string of keywords ($1) contains a
# given keyword ($2).
# Examples:
# `list_contains "foo,bar" bar` returns 0
# `list_contains "foo" bar` returns 1
list_contains () {
case ",$1," in
*,$2,*)
return 0
;;
esac
return 1
}
# This is not among top-level (test_expect_success | test_expect_failure)
# but is a prefix that can be used in the test script, like:
#
# test_expect_success 'complain and die' '
# do something &&
# do something else &&
# test_must_fail git checkout ../outerspace
# '
#
# Writing this as "! git checkout ../outerspace" is wrong, because
# the failure could be due to a segv. We want a controlled failure.
#
# Accepts the following options:
#
# ok=<signal-name>[,<...>]:
# Don't treat an exit caused by the given signal as error.
# Multiple signals can be specified as a comma separated list.
# Currently recognized signal names are: sigpipe, success.
# (Don't use 'success', use 'test_might_fail' instead.)
test_must_fail () {
case "$1" in
ok=*)
_test_ok=${1#ok=}
shift
;;
*)
_test_ok=
;;
esac
"$@" 2>&7
exit_code=$?
if test $exit_code -eq 0 && ! list_contains "$_test_ok" success
then
echo >&4 "test_must_fail: command succeeded: $*"
return 1
elif test_match_signal 13 $exit_code && list_contains "$_test_ok" sigpipe
then
return 0
elif test $exit_code -gt 129 && test $exit_code -le 192
then
echo >&4 "test_must_fail: died by signal $(($exit_code - 128)): $*"
return 1
elif test $exit_code -eq 127
then
echo >&4 "test_must_fail: command not found: $*"
return 1
elif test $exit_code -eq 126
then
echo >&4 "test_must_fail: valgrind error: $*"
return 1
fi
return 0
} 7>&2 2>&4
# Similar to test_must_fail, but tolerates success, too. This is
# meant to be used in contexts like:
#
# test_expect_success 'some command works without configuration' '
# test_might_fail git config --unset all.configuration &&
# do something
# '
#
# Writing "git config --unset all.configuration || :" would be wrong,
# because we want to notice if it fails due to segv.
#
# Accepts the same options as test_must_fail.
test_might_fail () {
test_must_fail ok=success "$@" 2>&7
} 7>&2 2>&4
# Similar to test_must_fail and test_might_fail, but check that a
# given command exited with a given exit code. Meant to be used as:
#
# test_expect_success 'Merge with d/f conflicts' '
# test_expect_code 1 git merge "merge msg" B master
# '
test_expect_code () {
want_code=$1
shift
"$@" 2>&7
exit_code=$?
if test $exit_code = $want_code
then
return 0
fi
echo >&4 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
return 1
} 7>&2 2>&4
# test_cmp is a helper function to compare actual and expected output.
# You can use it like:
#
# test_expect_success 'foo works' '
# echo expected >expected &&
# foo >actual &&
# test_cmp expected actual
# '
#
# This could be written as either "cmp" or "diff -u", but:
# - cmp's output is not nearly as easy to read as diff -u
# - not all diff versions understand "-u"
test_cmp() {
$GIT_TEST_CMP "$@"
}
# test_cmp_bin - helper to compare binary files
test_cmp_bin() {
cmp "$@"
}
# Use this instead of test_cmp to compare files that contain expected and
# actual output from git commands that can be translated. When running
# under GETTEXT_POISON this pretends that the command produced expected
# results.
test_i18ncmp () {
test -n "$GETTEXT_POISON" || test_cmp "$@"
}
# Use this instead of "grep expected-string actual" to see if the
# output from a git command that can be translated either contains an
# expected string, or does not contain an unwanted one. When running
# under GETTEXT_POISON this pretends that the command produced expected
# results.
test_i18ngrep () {
eval "last_arg=\${$#}"
test -f "$last_arg" ||
error "bug in the test script: test_i18ngrep requires a file" \
"to read as the last parameter"
if test $# -lt 2 ||
{ test "x!" = "x$1" && test $# -lt 3 ; }
then
error "bug in the test script: too few parameters to test_i18ngrep"
fi
if test -n "$GETTEXT_POISON"
then
# pretend success
return 0
fi
if test "x!" = "x$1"
then
shift
! grep "$@" && return 0
echo >&4 "error: '! grep $@' did find a match in:"
else
grep "$@" && return 0
echo >&4 "error: 'grep $@' didn't find a match in:"
fi
if test -s "$last_arg"
then
cat >&4 "$last_arg"
else
echo >&4 "<File '$last_arg' is empty>"
fi
return 1
}
# Call any command "$@" but be more verbose about its
# failure. This is handy for commands like "test" which do
# not output anything when they fail.
verbose () {
"$@" && return 0
echo >&4 "command failed: $(git rev-parse --sq-quote "$@")"
return 1
}
# Check if the file expected to be empty is indeed empty, and barfs
# otherwise.
test_must_be_empty () {
if ! test -f "$1"
then
echo "'$1' is missing"
return 1
elif test -s "$1"
then
echo "'$1' is not empty, it contains:"
cat "$1"
return 1
fi
}
# Tests that its two parameters refer to the same revision
test_cmp_rev () {
git rev-parse --verify "$1" >expect.rev &&
git rev-parse --verify "$2" >actual.rev &&
test_cmp expect.rev actual.rev
}
# Print a sequence of integers in increasing order, either with
# two arguments (start and end):
#
# test_seq 1 5 -- outputs 1 2 3 4 5 one line at a time
#
# or with one argument (end), in which case it starts counting
# from 1.
test_seq () {
case $# in
1) set 1 "$@" ;;
2) ;;
*) error "bug in the test script: not 1 or 2 parameters to test_seq" ;;
esac
test_seq_counter__=$1
while test "$test_seq_counter__" -le "$2"
do
echo "$test_seq_counter__"
test_seq_counter__=$(( $test_seq_counter__ + 1 ))
done
}
# This function can be used to schedule some commands to be run
# unconditionally at the end of the test to restore sanity:
#
# test_expect_success 'test core.capslock' '
# git config core.capslock true &&
# test_when_finished "git config --unset core.capslock" &&
# hello world
# '
#
# That would be roughly equivalent to
#
# test_expect_success 'test core.capslock' '
# git config core.capslock true &&
# hello world
# git config --unset core.capslock
# '
#
# except that the greeting and config --unset must both succeed for
# the test to pass.
#
# Note that under --immediate mode, no clean-up is done to help diagnose
# what went wrong.
test_when_finished () {
# We cannot detect when we are in a subshell in general, but by
# doing so on Bash is better than nothing (the test will
# silently pass on other shells).
test "${BASH_SUBSHELL-0}" = 0 ||
error "bug in test script: test_when_finished does nothing in a subshell"
test_cleanup="{ $*
} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
}
# Most tests can use the created repository, but some may need to create more.
# Usage: test_create_repo <directory>
test_create_repo () {
test "$#" = 1 ||
error "bug in the test script: not 1 parameter to test-create-repo"
repo="$1"
mkdir -p "$repo"
(
cd "$repo" || error "Cannot setup test environment"
"$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
error "cannot run git init -- have you built things yet?"
mv .git/hooks .git/hooks-disabled
) || exit
}
# This function helps on symlink challenged file systems when it is not
# important that the file system entry is a symbolic link.
# Use test_ln_s_add instead of "ln -s x y && git add y" to add a
# symbolic link entry y to the index.
test_ln_s_add () {
if test_have_prereq SYMLINKS
then
ln -s "$1" "$2" &&
git update-index --add "$2"
else
printf '%s' "$1" >"$2" &&
ln_s_obj=$(git hash-object -w "$2") &&
git update-index --add --cacheinfo 120000 $ln_s_obj "$2" &&
# pick up stat info from the file
git update-index "$2"
fi
}
# This function writes out its parameters, one per line
test_write_lines () {
printf "%s\n" "$@"
}
perl () {
command "$PERL_PATH" "$@" 2>&7
} 7>&2 2>&4
# Is the value one of the various ways to spell a boolean true/false?
test_normalize_bool () {
git -c magic.variable="$1" config --bool magic.variable 2>/dev/null
}
# Given a variable $1, normalize the value of it to one of "true",
# "false", or "auto" and store the result to it.
#
# test_tristate GIT_TEST_HTTPD
#
# A variable set to an empty string is set to 'false'.
# A variable set to 'false' or 'auto' keeps its value.
# Anything else is set to 'true'.
# An unset variable defaults to 'auto'.
#
# The last rule is to allow people to set the variable to an empty
# string and export it to decline testing the particular feature
# for versions both before and after this change. We used to treat
# both unset and empty variable as a signal for "do not test" and
# took any non-empty string as "please test".
test_tristate () {
if eval "test x\"\${$1+isset}\" = xisset"
then
# explicitly set
eval "
case \"\$$1\" in
'') $1=false ;;
auto) ;;
*) $1=\$(test_normalize_bool \$$1 || echo true) ;;
esac
"
else
eval "$1=auto"
fi
}
# Exit the test suite, either by skipping all remaining tests or by
# exiting with an error. If "$1" is "auto", we then we assume we were
# opportunistically trying to set up some tests and we skip. If it is
# "true", then we report a failure.
#
# The error/skip message should be given by $2.
#
test_skip_or_die () {
case "$1" in
auto)
skip_all=$2
test_done
;;
true)
error "$2"
;;
*)
error "BUG: test tristate is '$1' (real error: $2)"
esac
}
# The following mingw_* functions obey POSIX shell syntax, but are actually
# bash scripts, and are meant to be used only with bash on Windows.
# A test_cmp function that treats LF and CRLF equal and avoids to fork
# diff when possible.
mingw_test_cmp () {
# Read text into shell variables and compare them. If the results
# are different, use regular diff to report the difference.
local test_cmp_a= test_cmp_b=
# When text came from stdin (one argument is '-') we must feed it
# to diff.
local stdin_for_diff=
# Since it is difficult to detect the difference between an
# empty input file and a failure to read the files, we go straight
# to diff if one of the inputs is empty.
if test -s "$1" && test -s "$2"
then
# regular case: both files non-empty
mingw_read_file_strip_cr_ test_cmp_a <"$1"
mingw_read_file_strip_cr_ test_cmp_b <"$2"
elif test -s "$1" && test "$2" = -
then
# read 2nd file from stdin
mingw_read_file_strip_cr_ test_cmp_a <"$1"
mingw_read_file_strip_cr_ test_cmp_b
stdin_for_diff='<<<"$test_cmp_b"'
elif test "$1" = - && test -s "$2"
then
# read 1st file from stdin
mingw_read_file_strip_cr_ test_cmp_a
mingw_read_file_strip_cr_ test_cmp_b <"$2"
stdin_for_diff='<<<"$test_cmp_a"'
fi
test -n "$test_cmp_a" &&
test -n "$test_cmp_b" &&
test "$test_cmp_a" = "$test_cmp_b" ||
eval "diff -u \"\$@\" $stdin_for_diff"
}
# $1 is the name of the shell variable to fill in
mingw_read_file_strip_cr_ () {
# Read line-wise using LF as the line separator
# and use IFS to strip CR.
local line
while :
do
if IFS=$'\r' read -r -d $'\n' line
then
# good
line=$line$'\n'
else
# we get here at EOF, but also if the last line
# was not terminated by LF; in the latter case,
# some text was read
if test -z "$line"
then
# EOF, really
break
fi
fi
eval "$1=\$$1\$line"
done
}
# Like "env FOO=BAR some-program", but run inside a subshell, which means
# it also works for shell functions (though those functions cannot impact
# the environment outside of the test_env invocation).
test_env () {
(
while test $# -gt 0
do
case "$1" in
*=*)
eval "${1%%=*}=\${1#*=}"
eval "export ${1%%=*}"
shift
;;
*)
"$@" 2>&7
exit
;;
esac
done
)
} 7>&2 2>&4
# Returns true if the numeric exit code in "$2" represents the expected signal
# in "$1". Signals should be given numerically.
test_match_signal () {
if test "$2" = "$((128 + $1))"
then
# POSIX
return 0
elif test "$2" = "$((256 + $1))"
then
# ksh
return 0
fi
return 1
}
# Read up to "$1" bytes (or to EOF) from stdin and write them to stdout.
test_copy_bytes () {
perl -e '
my $len = $ARGV[1];
while ($len > 0) {
my $s;
my $nread = sysread(STDIN, $s, $len);
die "cannot read: $!" unless defined($nread);
last unless $nread;
print $s;
$len -= $nread;
}
' - "$1"
}
# run "$@" inside a non-git directory
nongit () {
test -d non-repo ||
mkdir non-repo ||
return 1
(
GIT_CEILING_DIRECTORIES=$(pwd) &&
export GIT_CEILING_DIRECTORIES &&
cd non-repo &&
"$@" 2>&7
)
} 7>&2 2>&4
# convert stdin to pktline representation; note that empty input becomes an
# empty packet, not a flush packet (for that you can just print 0000 yourself).
packetize() {
cat >packetize.tmp &&
len=$(wc -c <packetize.tmp) &&
printf '%04x%s' "$(($len + 4))" &&
cat packetize.tmp &&
rm -f packetize.tmp
}
# Parse the input as a series of pktlines, writing the result to stdout.
# Sideband markers are removed automatically, and the output is routed to
# stderr if appropriate.
#
# NUL bytes are converted to "\\0" for ease of parsing with text tools.
depacketize () {
perl -e '
while (read(STDIN, $len, 4) == 4) {
if ($len eq "0000") {
print "FLUSH\n";
} else {
read(STDIN, $buf, hex($len) - 4);
$buf =~ s/\0/\\0/g;
if ($buf =~ s/^[\x2\x3]//) {
print STDERR $buf;
} else {
$buf =~ s/^\x1//;
print $buf;
}
}
}
'
}