merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 1625 insertions, 0 deletions

diff --git a/third_party/git/t/test-lib.sh b/third_party/git/t/test-lib.sh
new file mode 100644
index 000000000000..30b07e310f59
--- /dev/null
+++ b/third_party/git/t/test-lib.sh
@@ -0,0 +1,1625 @@
+# Test framework for git.  See t/README for usage.
+#
+# 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/ .
+
+# Test the binaries we have just built.  The tests are kept in
+# t/ subdirectory and are run in 'trash directory' subdirectory.
+if test -z "$TEST_DIRECTORY"
+then
+	# We allow tests to override this, in case they want to run tests
+	# outside of t/, e.g. for running tests on the test library
+	# itself.
+	TEST_DIRECTORY=$(pwd)
+else
+	# ensure that TEST_DIRECTORY is an absolute path so that it
+	# is valid even if the current working directory is changed
+	TEST_DIRECTORY=$(cd "$TEST_DIRECTORY" && pwd) || exit 1
+fi
+if test -z "$TEST_OUTPUT_DIRECTORY"
+then
+	# Similarly, override this to store the test-results subdir
+	# elsewhere
+	TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
+fi
+GIT_BUILD_DIR="$TEST_DIRECTORY"/..
+
+# If we were built with ASAN, it may complain about leaks
+# of program-lifetime variables. Disable it by default to lower
+# the noise level. This needs to happen at the start of the script,
+# before we even do our "did we build git yet" check (since we don't
+# want that one to complain to stderr).
+: ${ASAN_OPTIONS=detect_leaks=0:abort_on_error=1}
+export ASAN_OPTIONS
+
+# If LSAN is in effect we _do_ want leak checking, but we still
+# want to abort so that we notice the problems.
+: ${LSAN_OPTIONS=abort_on_error=1}
+export LSAN_OPTIONS
+
+if test ! -f "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
+then
+	echo >&2 'error: GIT-BUILD-OPTIONS missing (has Git been built?).'
+	exit 1
+fi
+. "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
+export PERL_PATH SHELL_PATH
+
+# Disallow the use of abbreviated options in the test suite by default
+if test -z "${GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS}"
+then
+	GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS=true
+	export GIT_TEST_DISALLOW_ABBREVIATED_OPTIONS
+fi
+
+################################################################
+# It appears that people try to run tests without building...
+"${GIT_TEST_INSTALLED:-$GIT_BUILD_DIR}/git$X" >/dev/null
+if test $? != 1
+then
+	if test -n "$GIT_TEST_INSTALLED"
+	then
+		echo >&2 "error: there is no working Git at '$GIT_TEST_INSTALLED'"
+	else
+		echo >&2 'error: you do not seem to have built git yet.'
+	fi
+	exit 1
+fi
+
+# Parse options while taking care to leave $@ intact, so we will still
+# have all the original command line options when executing the test
+# script again for '--tee' and '--verbose-log' below.
+store_arg_to=
+prev_opt=
+for opt
+do
+	if test -n "$store_arg_to"
+	then
+		eval $store_arg_to=\$opt
+		store_arg_to=
+		prev_opt=
+		continue
+	fi
+
+	case "$opt" in
+	-d|--d|--de|--deb|--debu|--debug)
+		debug=t ;;
+	-i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
+		immediate=t ;;
+	-l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
+		GIT_TEST_LONG=t; export GIT_TEST_LONG ;;
+	-r)
+		store_arg_to=run_list
+		;;
+	--run=*)
+		run_list=${opt#--*=} ;;
+	-h|--h|--he|--hel|--help)
+		help=t ;;
+	-v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
+		verbose=t ;;
+	--verbose-only=*)
+		verbose_only=${opt#--*=}
+		;;
+	-q|--q|--qu|--qui|--quie|--quiet)
+		# Ignore --quiet under a TAP::Harness. Saying how many tests
+		# passed without the ok/not ok details is always an error.
+		test -z "$HARNESS_ACTIVE" && quiet=t ;;
+	--with-dashes)
+		with_dashes=t ;;
+	--no-bin-wrappers)
+		no_bin_wrappers=t ;;
+	--no-color)
+		color= ;;
+	--va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
+		valgrind=memcheck
+		tee=t
+		;;
+	--valgrind=*)
+		valgrind=${opt#--*=}
+		tee=t
+		;;
+	--valgrind-only=*)
+		valgrind_only=${opt#--*=}
+		tee=t
+		;;
+	--tee)
+		tee=t ;;
+	--root=*)
+		root=${opt#--*=} ;;
+	--chain-lint)
+		GIT_TEST_CHAIN_LINT=1 ;;
+	--no-chain-lint)
+		GIT_TEST_CHAIN_LINT=0 ;;
+	-x)
+		trace=t ;;
+	-V|--verbose-log)
+		verbose_log=t
+		tee=t
+		;;
+	--write-junit-xml)
+		write_junit_xml=t
+		;;
+	--stress)
+		stress=t ;;
+	--stress=*)
+		echo "error: --stress does not accept an argument: '$opt'" >&2
+		echo "did you mean --stress-jobs=${opt#*=} or --stress-limit=${opt#*=}?" >&2
+		exit 1
+		;;
+	--stress-jobs=*)
+		stress=t;
+		stress=${opt#--*=}
+		case "$stress" in
+		*[!0-9]*|0*|"")
+			echo "error: --stress-jobs=<N> requires the number of jobs to run" >&2
+			exit 1
+			;;
+		*)	# Good.
+			;;
+		esac
+		;;
+	--stress-limit=*)
+		stress=t;
+		stress_limit=${opt#--*=}
+		case "$stress_limit" in
+		*[!0-9]*|0*|"")
+			echo "error: --stress-limit=<N> requires the number of repetitions" >&2
+			exit 1
+			;;
+		*)	# Good.
+			;;
+		esac
+		;;
+	*)
+		echo "error: unknown test option '$opt'" >&2; exit 1 ;;
+	esac
+
+	prev_opt=$opt
+done
+if test -n "$store_arg_to"
+then
+	echo "error: $prev_opt requires an argument" >&2
+	exit 1
+fi
+
+if test -n "$valgrind_only"
+then
+	test -z "$valgrind" && valgrind=memcheck
+	test -z "$verbose" && verbose_only="$valgrind_only"
+elif test -n "$valgrind"
+then
+	test -z "$verbose_log" && verbose=t
+fi
+
+if test -n "$stress"
+then
+	verbose=t
+	trace=t
+	immediate=t
+fi
+
+TEST_STRESS_JOB_SFX="${GIT_TEST_STRESS_JOB_NR:+.stress-$GIT_TEST_STRESS_JOB_NR}"
+TEST_NAME="$(basename "$0" .sh)"
+TEST_RESULTS_DIR="$TEST_OUTPUT_DIRECTORY/test-results"
+TEST_RESULTS_BASE="$TEST_RESULTS_DIR/$TEST_NAME$TEST_STRESS_JOB_SFX"
+TRASH_DIRECTORY="trash directory.$TEST_NAME$TEST_STRESS_JOB_SFX"
+test -n "$root" && TRASH_DIRECTORY="$root/$TRASH_DIRECTORY"
+case "$TRASH_DIRECTORY" in
+/*) ;; # absolute path is good
+ *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$TRASH_DIRECTORY" ;;
+esac
+
+# If --stress was passed, run this test repeatedly in several parallel loops.
+if test "$GIT_TEST_STRESS_STARTED" = "done"
+then
+	: # Don't stress test again.
+elif test -n "$stress"
+then
+	if test "$stress" != t
+	then
+		job_count=$stress
+	elif test -n "$GIT_TEST_STRESS_LOAD"
+	then
+		job_count="$GIT_TEST_STRESS_LOAD"
+	elif job_count=$(getconf _NPROCESSORS_ONLN 2>/dev/null) &&
+	     test -n "$job_count"
+	then
+		job_count=$((2 * $job_count))
+	else
+		job_count=8
+	fi
+
+	mkdir -p "$TEST_RESULTS_DIR"
+	stressfail="$TEST_RESULTS_BASE.stress-failed"
+	rm -f "$stressfail"
+
+	stress_exit=0
+	trap '
+		kill $job_pids 2>/dev/null
+		wait
+		stress_exit=1
+	' TERM INT HUP
+
+	job_pids=
+	job_nr=0
+	while test $job_nr -lt "$job_count"
+	do
+		(
+			GIT_TEST_STRESS_STARTED=done
+			GIT_TEST_STRESS_JOB_NR=$job_nr
+			export GIT_TEST_STRESS_STARTED GIT_TEST_STRESS_JOB_NR
+
+			trap '
+				kill $test_pid 2>/dev/null
+				wait
+				exit 1
+			' TERM INT
+
+			cnt=1
+			while ! test -e "$stressfail" &&
+			      { test -z "$stress_limit" ||
+				test $cnt -le $stress_limit ; }
+			do
+				$TEST_SHELL_PATH "$0" "$@" >"$TEST_RESULTS_BASE.stress-$job_nr.out" 2>&1 &
+				test_pid=$!
+
+				if wait $test_pid
+				then
+					printf "OK   %2d.%d\n" $GIT_TEST_STRESS_JOB_NR $cnt
+				else
+					echo $GIT_TEST_STRESS_JOB_NR >>"$stressfail"
+					printf "FAIL %2d.%d\n" $GIT_TEST_STRESS_JOB_NR $cnt
+				fi
+				cnt=$(($cnt + 1))
+			done
+		) &
+		job_pids="$job_pids $!"
+		job_nr=$(($job_nr + 1))
+	done
+
+	wait
+
+	if test -f "$stressfail"
+	then
+		stress_exit=1
+		echo "Log(s) of failed test run(s):"
+		for failed_job_nr in $(sort -n "$stressfail")
+		do
+			echo "Contents of '$TEST_RESULTS_BASE.stress-$failed_job_nr.out':"
+			cat "$TEST_RESULTS_BASE.stress-$failed_job_nr.out"
+		done
+		rm -rf "$TRASH_DIRECTORY.stress-failed"
+		# Move the last one.
+		mv "$TRASH_DIRECTORY.stress-$failed_job_nr" "$TRASH_DIRECTORY.stress-failed"
+	fi
+
+	exit $stress_exit
+fi
+
+# if --tee was passed, write the output not only to the terminal, but
+# additionally to the file test-results/$BASENAME.out, too.
+if test "$GIT_TEST_TEE_STARTED" = "done"
+then
+	: # do not redirect again
+elif test -n "$tee"
+then
+	mkdir -p "$TEST_RESULTS_DIR"
+
+	# Make this filename available to the sub-process in case it is using
+	# --verbose-log.
+	GIT_TEST_TEE_OUTPUT_FILE=$TEST_RESULTS_BASE.out
+	export GIT_TEST_TEE_OUTPUT_FILE
+
+	# Truncate before calling "tee -a" to get rid of the results
+	# from any previous runs.
+	>"$GIT_TEST_TEE_OUTPUT_FILE"
+
+	(GIT_TEST_TEE_STARTED=done ${TEST_SHELL_PATH} "$0" "$@" 2>&1;
+	 echo $? >"$TEST_RESULTS_BASE.exit") | tee -a "$GIT_TEST_TEE_OUTPUT_FILE"
+	test "$(cat "$TEST_RESULTS_BASE.exit")" = 0
+	exit
+fi
+
+if test -n "$trace" && test -n "$test_untraceable"
+then
+	# '-x' tracing requested, but this test script can't be reliably
+	# traced, unless it is run with a Bash version supporting
+	# BASH_XTRACEFD (introduced in Bash v4.1).
+	#
+	# Perform this version check _after_ the test script was
+	# potentially re-executed with $TEST_SHELL_PATH for '--tee' or
+	# '--verbose-log', so the right shell is checked and the
+	# warning is issued only once.
+	if test -n "$BASH_VERSION" && eval '
+	     test ${BASH_VERSINFO[0]} -gt 4 || {
+	       test ${BASH_VERSINFO[0]} -eq 4 &&
+	       test ${BASH_VERSINFO[1]} -ge 1
+	     }
+	   '
+	then
+		: Executed by a Bash version supporting BASH_XTRACEFD.  Good.
+	else
+		echo >&2 "warning: ignoring -x; '$0' is untraceable without BASH_XTRACEFD"
+		trace=
+	fi
+fi
+if test -n "$trace" && test -z "$verbose_log"
+then
+	verbose=t
+fi
+
+# For repeatability, reset the environment to known value.
+# TERM is sanitized below, after saving color control sequences.
+LANG=C
+LC_ALL=C
+PAGER=cat
+TZ=UTC
+export LANG LC_ALL PAGER TZ
+EDITOR=:
+
+# GIT_TEST_GETTEXT_POISON should not influence git commands executed
+# during initialization of test-lib and the test repo. Back it up,
+# unset and then restore after initialization is finished.
+if test -n "$GIT_TEST_GETTEXT_POISON"
+then
+	GIT_TEST_GETTEXT_POISON_ORIG=$GIT_TEST_GETTEXT_POISON
+	unset GIT_TEST_GETTEXT_POISON
+fi
+
+# A call to "unset" with no arguments causes at least Solaris 10
+# /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
+# deriving from the command substitution clustered with the other
+# ones.
+unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
+	my @env = keys %ENV;
+	my $ok = join("|", qw(
+		TRACE
+		DEBUG
+		TEST
+		.*_TEST
+		PROVE
+		VALGRIND
+		UNZIP
+		PERF_
+		CURL_VERBOSE
+		TRACE_CURL
+	));
+	my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
+	print join("\n", @vars);
+')
+unset XDG_CACHE_HOME
+unset XDG_CONFIG_HOME
+unset GITPERLLIB
+GIT_AUTHOR_EMAIL=author@example.com
+GIT_AUTHOR_NAME='A U Thor'
+GIT_COMMITTER_EMAIL=committer@example.com
+GIT_COMMITTER_NAME='C O Mitter'
+GIT_MERGE_VERBOSITY=5
+GIT_MERGE_AUTOEDIT=no
+export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
+export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
+export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
+export EDITOR
+
+# Tests using GIT_TRACE typically don't want <timestamp> <file>:<line> output
+GIT_TRACE_BARE=1
+export GIT_TRACE_BARE
+
+check_var_migration () {
+	# the warnings and hints given from this helper depends
+	# on end-user settings, which will disrupt the self-test
+	# done on the test framework itself.
+	case "$GIT_TEST_FRAMEWORK_SELFTEST" in
+	t)	return ;;
+	esac
+
+	old_name=$1 new_name=$2
+	eval "old_isset=\${${old_name}:+isset}"
+	eval "new_isset=\${${new_name}:+isset}"
+
+	case "$old_isset,$new_isset" in
+	isset,)
+		echo >&2 "warning: $old_name is now $new_name"
+		echo >&2 "hint: set $new_name too during the transition period"
+		eval "$new_name=\$$old_name"
+		;;
+	isset,isset)
+		# do this later
+		# echo >&2 "warning: $old_name is now $new_name"
+		# echo >&2 "hint: remove $old_name"
+		;;
+	esac
+}
+
+check_var_migration GIT_FSMONITOR_TEST GIT_TEST_FSMONITOR
+check_var_migration TEST_GIT_INDEX_VERSION GIT_TEST_INDEX_VERSION
+check_var_migration GIT_FORCE_PRELOAD_TEST GIT_TEST_PRELOAD_INDEX
+
+# Use specific version of the index file format
+if test -n "${GIT_TEST_INDEX_VERSION:+isset}"
+then
+	GIT_INDEX_VERSION="$GIT_TEST_INDEX_VERSION"
+	export GIT_INDEX_VERSION
+fi
+
+# Add libc MALLOC and MALLOC_PERTURB test
+# only if we are not executing the test with valgrind
+if test -n "$valgrind" ||
+   test -n "$TEST_NO_MALLOC_CHECK"
+then
+	setup_malloc_check () {
+		: nothing
+	}
+	teardown_malloc_check () {
+		: nothing
+	}
+else
+	setup_malloc_check () {
+		MALLOC_CHECK_=3	MALLOC_PERTURB_=165
+		export MALLOC_CHECK_ MALLOC_PERTURB_
+	}
+	teardown_malloc_check () {
+		unset MALLOC_CHECK_ MALLOC_PERTURB_
+	}
+fi
+
+# Protect ourselves from common misconfiguration to export
+# CDPATH into the environment
+unset CDPATH
+
+unset GREP_OPTIONS
+unset UNZIP
+
+case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
+1|2|true)
+	GIT_TRACE=4
+	;;
+esac
+
+# Convenience
+#
+# A regexp to match 5, 35 and 40 hexdigits
+_x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
+_x35="$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
+_x40="$_x35$_x05"
+
+# Zero SHA-1
+_z40=0000000000000000000000000000000000000000
+
+OID_REGEX="$_x40"
+ZERO_OID=$_z40
+EMPTY_TREE=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+EMPTY_BLOB=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
+
+# Line feed
+LF='
+'
+
+# UTF-8 ZERO WIDTH NON-JOINER, which HFS+ ignores
+# when case-folding filenames
+u200c=$(printf '\342\200\214')
+
+export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB ZERO_OID OID_REGEX
+
+# Each test should start with something like this, after copyright notices:
+#
+# test_description='Description of this test...
+# This test checks if command xyzzy does the right thing...
+# '
+# . ./test-lib.sh
+test "x$TERM" != "xdumb" && (
+		test -t 1 &&
+		tput bold >/dev/null 2>&1 &&
+		tput setaf 1 >/dev/null 2>&1 &&
+		tput sgr0 >/dev/null 2>&1
+	) &&
+	color=t
+
+if test -n "$color"
+then
+	# Save the color control sequences now rather than run tput
+	# each time say_color() is called.  This is done for two
+	# reasons:
+	#   * TERM will be changed to dumb
+	#   * HOME will be changed to a temporary directory and tput
+	#     might need to read ~/.terminfo from the original HOME
+	#     directory to get the control sequences
+	# Note:  This approach assumes the control sequences don't end
+	# in a newline for any terminal of interest (command
+	# substitutions strip trailing newlines).  Given that most
+	# (all?) terminals in common use are related to ECMA-48, this
+	# shouldn't be a problem.
+	say_color_error=$(tput bold; tput setaf 1) # bold red
+	say_color_skip=$(tput setaf 4) # blue
+	say_color_warn=$(tput setaf 3) # brown/yellow
+	say_color_pass=$(tput setaf 2) # green
+	say_color_info=$(tput setaf 6) # cyan
+	say_color_reset=$(tput sgr0)
+	say_color_="" # no formatting for normal text
+	say_color () {
+		test -z "$1" && test -n "$quiet" && return
+		eval "say_color_color=\$say_color_$1"
+		shift
+		printf "%s\\n" "$say_color_color$*$say_color_reset"
+	}
+else
+	say_color() {
+		test -z "$1" && test -n "$quiet" && return
+		shift
+		printf "%s\n" "$*"
+	}
+fi
+
+TERM=dumb
+export TERM
+
+error () {
+	say_color error "error: $*"
+	GIT_EXIT_OK=t
+	exit 1
+}
+
+BUG () {
+	error >&7 "bug in the test script: $*"
+}
+
+say () {
+	say_color info "$*"
+}
+
+if test -n "$HARNESS_ACTIVE"
+then
+	if test "$verbose" = t || test -n "$verbose_only"
+	then
+		printf 'Bail out! %s\n' \
+		 'verbose mode forbidden under TAP harness; try --verbose-log'
+		exit 1
+	fi
+fi
+
+test "${test_description}" != "" ||
+error "Test script did not set test_description."
+
+if test "$help" = "t"
+then
+	printf '%s\n' "$test_description"
+	exit 0
+fi
+
+exec 5>&1
+exec 6<&0
+exec 7>&2
+if test "$verbose_log" = "t"
+then
+	exec 3>>"$GIT_TEST_TEE_OUTPUT_FILE" 4>&3
+elif test "$verbose" = "t"
+then
+	exec 4>&2 3>&1
+else
+	exec 4>/dev/null 3>/dev/null
+fi
+
+# Send any "-x" output directly to stderr to avoid polluting tests
+# which capture stderr. We can do this unconditionally since it
+# has no effect if tracing isn't turned on.
+#
+# Note that this sets up the trace fd as soon as we assign the variable, so it
+# must come after the creation of descriptor 4 above. Likewise, we must never
+# unset this, as it has the side effect of closing descriptor 4, which we
+# use to show verbose tests to the user.
+#
+# Note also that we don't need or want to export it. The tracing is local to
+# this shell, and we would not want to influence any shells we exec.
+BASH_XTRACEFD=4
+
+test_failure=0
+test_count=0
+test_fixed=0
+test_broken=0
+test_success=0
+
+test_external_has_tap=0
+
+die () {
+	code=$?
+	# This is responsible for running the atexit commands even when a
+	# test script run with '--immediate' fails, or when the user hits
+	# ctrl-C, i.e. when 'test_done' is not invoked at all.
+	test_atexit_handler || code=$?
+	if test -n "$GIT_EXIT_OK"
+	then
+		exit $code
+	else
+		echo >&5 "FATAL: Unexpected exit with code $code"
+		exit 1
+	fi
+}
+
+GIT_EXIT_OK=
+trap 'die' EXIT
+# Disable '-x' tracing, because with some shells, notably dash, it
+# prevents running the cleanup commands when a test script run with
+# '--verbose-log -x' is interrupted.
+trap '{ code=$?; set +x; } 2>/dev/null; exit $code' INT TERM HUP
+
+# The user-facing functions are loaded from a separate file so that
+# test_perf subshells can have them too
+. "$TEST_DIRECTORY/test-lib-functions.sh"
+
+# You are not expected to call test_ok_ and test_failure_ directly, use
+# the test_expect_* functions instead.
+
+test_ok_ () {
+	if test -n "$write_junit_xml"
+	then
+		write_junit_xml_testcase "$*"
+	fi
+	test_success=$(($test_success + 1))
+	say_color "" "ok $test_count - $@"
+}
+
+test_failure_ () {
+	if test -n "$write_junit_xml"
+	then
+		junit_insert="<failure message=\"not ok $test_count -"
+		junit_insert="$junit_insert $(xml_attr_encode "$1")\">"
+		junit_insert="$junit_insert $(xml_attr_encode \
+			"$(if test -n "$GIT_TEST_TEE_OUTPUT_FILE"
+			   then
+				test-tool path-utils skip-n-bytes \
+					"$GIT_TEST_TEE_OUTPUT_FILE" $GIT_TEST_TEE_OFFSET
+			   else
+				printf '%s\n' "$@" | sed 1d
+			   fi)")"
+		junit_insert="$junit_insert</failure>"
+		if test -n "$GIT_TEST_TEE_OUTPUT_FILE"
+		then
+			junit_insert="$junit_insert<system-err>$(xml_attr_encode \
+				"$(cat "$GIT_TEST_TEE_OUTPUT_FILE")")</system-err>"
+		fi
+		write_junit_xml_testcase "$1" "      $junit_insert"
+	fi
+	test_failure=$(($test_failure + 1))
+	say_color error "not ok $test_count - $1"
+	shift
+	printf '%s\n' "$*" | sed -e 's/^/#	/'
+	test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
+}
+
+test_known_broken_ok_ () {
+	if test -n "$write_junit_xml"
+	then
+		write_junit_xml_testcase "$* (breakage fixed)"
+	fi
+	test_fixed=$(($test_fixed+1))
+	say_color error "ok $test_count - $@ # TODO known breakage vanished"
+}
+
+test_known_broken_failure_ () {
+	if test -n "$write_junit_xml"
+	then
+		write_junit_xml_testcase "$* (known breakage)"
+	fi
+	test_broken=$(($test_broken+1))
+	say_color warn "not ok $test_count - $@ # TODO known breakage"
+}
+
+test_debug () {
+	test "$debug" = "" || eval "$1"
+}
+
+match_pattern_list () {
+	arg="$1"
+	shift
+	test -z "$*" && return 1
+	for pattern_
+	do
+		case "$arg" in
+		$pattern_)
+			return 0
+		esac
+	done
+	return 1
+}
+
+match_test_selector_list () {
+	title="$1"
+	shift
+	arg="$1"
+	shift
+	test -z "$1" && return 0
+
+	# Both commas and whitespace are accepted as separators.
+	OLDIFS=$IFS
+	IFS=' 	,'
+	set -- $1
+	IFS=$OLDIFS
+
+	# If the first selector is negative we include by default.
+	include=
+	case "$1" in
+		!*) include=t ;;
+	esac
+
+	for selector
+	do
+		orig_selector=$selector
+
+		positive=t
+		case "$selector" in
+			!*)
+				positive=
+				selector=${selector##?}
+				;;
+		esac
+
+		test -z "$selector" && continue
+
+		case "$selector" in
+			*-*)
+				if expr "z${selector%%-*}" : "z[0-9]*[^0-9]" >/dev/null
+				then
+					echo "error: $title: invalid non-numeric in range" \
+						"start: '$orig_selector'" >&2
+					exit 1
+				fi
+				if expr "z${selector#*-}" : "z[0-9]*[^0-9]" >/dev/null
+				then
+					echo "error: $title: invalid non-numeric in range" \
+						"end: '$orig_selector'" >&2
+					exit 1
+				fi
+				;;
+			*)
+				if expr "z$selector" : "z[0-9]*[^0-9]" >/dev/null
+				then
+					echo "error: $title: invalid non-numeric in test" \
+						"selector: '$orig_selector'" >&2
+					exit 1
+				fi
+		esac
+
+		# Short cut for "obvious" cases
+		test -z "$include" && test -z "$positive" && continue
+		test -n "$include" && test -n "$positive" && continue
+
+		case "$selector" in
+			-*)
+				if test $arg -le ${selector#-}
+				then
+					include=$positive
+				fi
+				;;
+			*-)
+				if test $arg -ge ${selector%-}
+				then
+					include=$positive
+				fi
+				;;
+			*-*)
+				if test ${selector%%-*} -le $arg \
+					&& test $arg -le ${selector#*-}
+				then
+					include=$positive
+				fi
+				;;
+			*)
+				if test $arg -eq $selector
+				then
+					include=$positive
+				fi
+				;;
+		esac
+	done
+
+	test -n "$include"
+}
+
+maybe_teardown_verbose () {
+	test -z "$verbose_only" && return
+	exec 4>/dev/null 3>/dev/null
+	verbose=
+}
+
+last_verbose=t
+maybe_setup_verbose () {
+	test -z "$verbose_only" && return
+	if match_pattern_list $test_count $verbose_only
+	then
+		exec 4>&2 3>&1
+		# Emit a delimiting blank line when going from
+		# non-verbose to verbose.  Within verbose mode the
+		# delimiter is printed by test_expect_*.  The choice
+		# of the initial $last_verbose is such that before
+		# test 1, we do not print it.
+		test -z "$last_verbose" && echo >&3 ""
+		verbose=t
+	else
+		exec 4>/dev/null 3>/dev/null
+		verbose=
+	fi
+	last_verbose=$verbose
+}
+
+maybe_teardown_valgrind () {
+	test -z "$GIT_VALGRIND" && return
+	GIT_VALGRIND_ENABLED=
+}
+
+maybe_setup_valgrind () {
+	test -z "$GIT_VALGRIND" && return
+	if test -z "$valgrind_only"
+	then
+		GIT_VALGRIND_ENABLED=t
+		return
+	fi
+	GIT_VALGRIND_ENABLED=
+	if match_pattern_list $test_count $valgrind_only
+	then
+		GIT_VALGRIND_ENABLED=t
+	fi
+}
+
+want_trace () {
+	test "$trace" = t && {
+		test "$verbose" = t || test "$verbose_log" = t
+	}
+}
+
+# This is a separate function because some tests use
+# "return" to end a test_expect_success block early
+# (and we want to make sure we run any cleanup like
+# "set +x").
+test_eval_inner_ () {
+	# Do not add anything extra (including LF) after '$*'
+	eval "
+		want_trace && set -x
+		$*"
+}
+
+test_eval_ () {
+	# If "-x" tracing is in effect, then we want to avoid polluting stderr
+	# with non-test commands. But once in "set -x" mode, we cannot prevent
+	# the shell from printing the "set +x" to turn it off (nor the saving
+	# of $? before that). But we can make sure that the output goes to
+	# /dev/null.
+	#
+	# There are a few subtleties here:
+	#
+	#   - we have to redirect descriptor 4 in addition to 2, to cover
+	#     BASH_XTRACEFD
+	#
+	#   - the actual eval has to come before the redirection block (since
+	#     it needs to see descriptor 4 to set up its stderr)
+	#
+	#   - likewise, any error message we print must be outside the block to
+	#     access descriptor 4
+	#
+	#   - checking $? has to come immediately after the eval, but it must
+	#     be _inside_ the block to avoid polluting the "set -x" output
+	#
+
+	test_eval_inner_ "$@" </dev/null >&3 2>&4
+	{
+		test_eval_ret_=$?
+		if want_trace
+		then
+			set +x
+		fi
+	} 2>/dev/null 4>&2
+
+	if test "$test_eval_ret_" != 0 && want_trace
+	then
+		say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
+	fi
+	return $test_eval_ret_
+}
+
+test_run_ () {
+	test_cleanup=:
+	expecting_failure=$2
+
+	if test "${GIT_TEST_CHAIN_LINT:-1}" != 0; then
+		# turn off tracing for this test-eval, as it simply creates
+		# confusing noise in the "-x" output
+		trace_tmp=$trace
+		trace=
+		# 117 is magic because it is unlikely to match the exit
+		# code of other programs
+		if $(printf '%s\n' "$1" | sed -f "$GIT_BUILD_DIR/t/chainlint.sed" | grep -q '?![A-Z][A-Z]*?!') ||
+			test "OK-117" != "$(test_eval_ "(exit 117) && $1${LF}${LF}echo OK-\$?" 3>&1)"
+		then
+			BUG "broken &&-chain or run-away HERE-DOC: $1"
+		fi
+		trace=$trace_tmp
+	fi
+
+	setup_malloc_check
+	test_eval_ "$1"
+	eval_ret=$?
+	teardown_malloc_check
+
+	if test -z "$immediate" || test $eval_ret = 0 ||
+	   test -n "$expecting_failure" && test "$test_cleanup" != ":"
+	then
+		setup_malloc_check
+		test_eval_ "$test_cleanup"
+		teardown_malloc_check
+	fi
+	if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
+	then
+		echo ""
+	fi
+	return "$eval_ret"
+}
+
+test_start_ () {
+	test_count=$(($test_count+1))
+	maybe_setup_verbose
+	maybe_setup_valgrind
+	if test -n "$write_junit_xml"
+	then
+		junit_start=$(test-tool date getnanos)
+	fi
+}
+
+test_finish_ () {
+	echo >&3 ""
+	maybe_teardown_valgrind
+	maybe_teardown_verbose
+	if test -n "$GIT_TEST_TEE_OFFSET"
+	then
+		GIT_TEST_TEE_OFFSET=$(test-tool path-utils file-size \
+			"$GIT_TEST_TEE_OUTPUT_FILE")
+	fi
+}
+
+test_skip () {
+	to_skip=
+	skipped_reason=
+	if match_pattern_list $this_test.$test_count $GIT_SKIP_TESTS
+	then
+		to_skip=t
+		skipped_reason="GIT_SKIP_TESTS"
+	fi
+	if test -z "$to_skip" && test -n "$test_prereq" &&
+	   ! test_have_prereq "$test_prereq"
+	then
+		to_skip=t
+
+		of_prereq=
+		if test "$missing_prereq" != "$test_prereq"
+		then
+			of_prereq=" of $test_prereq"
+		fi
+		skipped_reason="missing $missing_prereq${of_prereq}"
+	fi
+	if test -z "$to_skip" && test -n "$run_list" &&
+		! match_test_selector_list '--run' $test_count "$run_list"
+	then
+		to_skip=t
+		skipped_reason="--run"
+	fi
+
+	case "$to_skip" in
+	t)
+		if test -n "$write_junit_xml"
+		then
+			message="$(xml_attr_encode "$skipped_reason")"
+			write_junit_xml_testcase "$1" \
+				"      <skipped message=\"$message\" />"
+		fi
+
+		say_color skip >&3 "skipping test: $@"
+		say_color skip "ok $test_count # skip $1 ($skipped_reason)"
+		: true
+		;;
+	*)
+		false
+		;;
+	esac
+}
+
+# stub; perf-lib overrides it
+test_at_end_hook_ () {
+	:
+}
+
+write_junit_xml () {
+	case "$1" in
+	--truncate)
+		>"$junit_xml_path"
+		junit_have_testcase=
+		shift
+		;;
+	esac
+	printf '%s\n' "$@" >>"$junit_xml_path"
+}
+
+xml_attr_encode () {
+	printf '%s\n' "$@" | test-tool xml-encode
+}
+
+write_junit_xml_testcase () {
+	junit_attrs="name=\"$(xml_attr_encode "$this_test.$test_count $1")\""
+	shift
+	junit_attrs="$junit_attrs classname=\"$this_test\""
+	junit_attrs="$junit_attrs time=\"$(test-tool \
+		date getnanos $junit_start)\""
+	write_junit_xml "$(printf '%s\n' \
+		"    <testcase $junit_attrs>" "$@" "    </testcase>")"
+	junit_have_testcase=t
+}
+
+test_atexit_cleanup=:
+test_atexit_handler () {
+	# In a succeeding test script 'test_atexit_handler' is invoked
+	# twice: first from 'test_done', then from 'die' in the trap on
+	# EXIT.
+	# This condition and resetting 'test_atexit_cleanup' below makes
+	# sure that the registered cleanup commands are run only once.
+	test : != "$test_atexit_cleanup" || return 0
+
+	setup_malloc_check
+	test_eval_ "$test_atexit_cleanup"
+	test_atexit_cleanup=:
+	teardown_malloc_check
+}
+
+test_done () {
+	GIT_EXIT_OK=t
+
+	# Run the atexit commands _before_ the trash directory is
+	# removed, so the commands can access pidfiles and socket files.
+	test_atexit_handler
+
+	if test -n "$write_junit_xml" && test -n "$junit_xml_path"
+	then
+		test -n "$junit_have_testcase" || {
+			junit_start=$(test-tool date getnanos)
+			write_junit_xml_testcase "all tests skipped"
+		}
+
+		# adjust the overall time
+		junit_time=$(test-tool date getnanos $junit_suite_start)
+		sed "s/<testsuite [^>]*/& time=\"$junit_time\"/" \
+			<"$junit_xml_path" >"$junit_xml_path.new"
+		mv "$junit_xml_path.new" "$junit_xml_path"
+
+		write_junit_xml "  </testsuite>" "</testsuites>"
+	fi
+
+	if test -z "$HARNESS_ACTIVE"
+	then
+		mkdir -p "$TEST_RESULTS_DIR"
+
+		cat >"$TEST_RESULTS_BASE.counts" <<-EOF
+		total $test_count
+		success $test_success
+		fixed $test_fixed
+		broken $test_broken
+		failed $test_failure
+
+		EOF
+	fi
+
+	if test "$test_fixed" != 0
+	then
+		say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
+	fi
+	if test "$test_broken" != 0
+	then
+		say_color warn "# still have $test_broken known breakage(s)"
+	fi
+	if test "$test_broken" != 0 || test "$test_fixed" != 0
+	then
+		test_remaining=$(( $test_count - $test_broken - $test_fixed ))
+		msg="remaining $test_remaining test(s)"
+	else
+		test_remaining=$test_count
+		msg="$test_count test(s)"
+	fi
+	case "$test_failure" in
+	0)
+		if test $test_external_has_tap -eq 0
+		then
+			if test $test_remaining -gt 0
+			then
+				say_color pass "# passed all $msg"
+			fi
+
+			# Maybe print SKIP message
+			test -z "$skip_all" || skip_all="# SKIP $skip_all"
+			case "$test_count" in
+			0)
+				say "1..$test_count${skip_all:+ $skip_all}"
+				;;
+			*)
+				test -z "$skip_all" ||
+				say_color warn "$skip_all"
+				say "1..$test_count"
+				;;
+			esac
+		fi
+
+		if test -z "$debug"
+		then
+			test -d "$TRASH_DIRECTORY" ||
+			error "Tests passed but trash directory already removed before test cleanup; aborting"
+
+			cd "$TRASH_DIRECTORY/.." &&
+			rm -fr "$TRASH_DIRECTORY" || {
+				# try again in a bit
+				sleep 5;
+				rm -fr "$TRASH_DIRECTORY"
+			} ||
+			error "Tests passed but test cleanup failed; aborting"
+		fi
+		test_at_end_hook_
+
+		exit 0 ;;
+
+	*)
+		if test $test_external_has_tap -eq 0
+		then
+			say_color error "# failed $test_failure among $msg"
+			say "1..$test_count"
+		fi
+
+		exit 1 ;;
+
+	esac
+}
+
+if test -n "$valgrind"
+then
+	make_symlink () {
+		test -h "$2" &&
+		test "$1" = "$(readlink "$2")" || {
+			# be super paranoid
+			if mkdir "$2".lock
+			then
+				rm -f "$2" &&
+				ln -s "$1" "$2" &&
+				rm -r "$2".lock
+			else
+				while test -d "$2".lock
+				do
+					say "Waiting for lock on $2."
+					sleep 1
+				done
+			fi
+		}
+	}
+
+	make_valgrind_symlink () {
+		# handle only executables, unless they are shell libraries that
+		# need to be in the exec-path.
+		test -x "$1" ||
+		test "# " = "$(test_copy_bytes 2 <"$1")" ||
+		return;
+
+		base=$(basename "$1")
+		case "$base" in
+		test-*)
+			symlink_target="$GIT_BUILD_DIR/t/helper/$base"
+			;;
+		*)
+			symlink_target="$GIT_BUILD_DIR/$base"
+			;;
+		esac
+		# do not override scripts
+		if test -x "$symlink_target" &&
+		    test ! -d "$symlink_target" &&
+		    test "#!" != "$(test_copy_bytes 2 <"$symlink_target")"
+		then
+			symlink_target=../valgrind.sh
+		fi
+		case "$base" in
+		*.sh|*.perl)
+			symlink_target=../unprocessed-script
+		esac
+		# create the link, or replace it if it is out of date
+		make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
+	}
+
+	# override all git executables in TEST_DIRECTORY/..
+	GIT_VALGRIND=$TEST_DIRECTORY/valgrind
+	mkdir -p "$GIT_VALGRIND"/bin
+	for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/t/helper/test-*
+	do
+		make_valgrind_symlink $file
+	done
+	# special-case the mergetools loadables
+	make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
+	OLDIFS=$IFS
+	IFS=:
+	for path in $PATH
+	do
+		ls "$path"/git-* 2> /dev/null |
+		while read file
+		do
+			make_valgrind_symlink "$file"
+		done
+	done
+	IFS=$OLDIFS
+	PATH=$GIT_VALGRIND/bin:$PATH
+	GIT_EXEC_PATH=$GIT_VALGRIND/bin
+	export GIT_VALGRIND
+	GIT_VALGRIND_MODE="$valgrind"
+	export GIT_VALGRIND_MODE
+	GIT_VALGRIND_ENABLED=t
+	test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
+	export GIT_VALGRIND_ENABLED
+elif test -n "$GIT_TEST_INSTALLED"
+then
+	GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
+	error "Cannot run git from $GIT_TEST_INSTALLED."
+	PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR/t/helper:$PATH
+	GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
+else # normal case, use ../bin-wrappers only unless $with_dashes:
+	if test -n "$no_bin_wrappers"
+	then
+		with_dashes=t
+	else
+		git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
+		if ! test -x "$git_bin_dir/git"
+		then
+			if test -z "$with_dashes"
+			then
+				say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
+			fi
+			with_dashes=t
+		fi
+		PATH="$git_bin_dir:$PATH"
+	fi
+	GIT_EXEC_PATH=$GIT_BUILD_DIR
+	if test -n "$with_dashes"
+	then
+		PATH="$GIT_BUILD_DIR:$GIT_BUILD_DIR/t/helper:$PATH"
+	fi
+fi
+GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
+GIT_CONFIG_NOSYSTEM=1
+GIT_ATTR_NOSYSTEM=1
+export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
+
+if test -z "$GIT_TEST_CMP"
+then
+	if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
+	then
+		GIT_TEST_CMP="$DIFF -c"
+	else
+		GIT_TEST_CMP="$DIFF -u"
+	fi
+fi
+
+GITPERLLIB="$GIT_BUILD_DIR"/perl/build/lib
+export GITPERLLIB
+test -d "$GIT_BUILD_DIR"/templates/blt || {
+	error "You haven't built things yet, have you?"
+}
+
+if ! test -x "$GIT_BUILD_DIR"/t/helper/test-tool$X
+then
+	echo >&2 'You need to build test-tool:'
+	echo >&2 'Run "make t/helper/test-tool" in the source (toplevel) directory'
+	exit 1
+fi
+
+# Test repository
+rm -fr "$TRASH_DIRECTORY" || {
+	GIT_EXIT_OK=t
+	echo >&5 "FATAL: Cannot prepare test area"
+	exit 1
+}
+
+HOME="$TRASH_DIRECTORY"
+GNUPGHOME="$HOME/gnupg-home-not-used"
+export HOME GNUPGHOME
+
+if test -z "$TEST_NO_CREATE_REPO"
+then
+	test_create_repo "$TRASH_DIRECTORY"
+else
+	mkdir -p "$TRASH_DIRECTORY"
+fi
+
+# Use -P to resolve symlinks in our working directory so that the cwd
+# in subprocesses like git equals our $PWD (for pathname comparisons).
+cd -P "$TRASH_DIRECTORY" || exit 1
+
+this_test=${0##*/}
+this_test=${this_test%%-*}
+if match_pattern_list "$this_test" $GIT_SKIP_TESTS
+then
+	say_color info >&3 "skipping test $this_test altogether"
+	skip_all="skip all tests in $this_test"
+	test_done
+fi
+
+if test -n "$write_junit_xml"
+then
+	junit_xml_dir="$TEST_OUTPUT_DIRECTORY/out"
+	mkdir -p "$junit_xml_dir"
+	junit_xml_base=${0##*/}
+	junit_xml_path="$junit_xml_dir/TEST-${junit_xml_base%.sh}.xml"
+	junit_attrs="name=\"${junit_xml_base%.sh}\""
+	junit_attrs="$junit_attrs timestamp=\"$(TZ=UTC \
+		date +%Y-%m-%dT%H:%M:%S)\""
+	write_junit_xml --truncate "<testsuites>" "  <testsuite $junit_attrs>"
+	junit_suite_start=$(test-tool date getnanos)
+	if test -n "$GIT_TEST_TEE_OUTPUT_FILE"
+	then
+		GIT_TEST_TEE_OFFSET=0
+	fi
+fi
+
+# Provide an implementation of the 'yes' utility; the upper bound
+# limit is there to help Windows that cannot stop this loop from
+# wasting cycles when the downstream stops reading, so do not be
+# tempted to turn it into an infinite loop. cf. 6129c930 ("test-lib:
+# limit the output of the yes utility", 2016-02-02)
+yes () {
+	if test $# = 0
+	then
+		y=y
+	else
+		y="$*"
+	fi
+
+	i=0
+	while test $i -lt 99
+	do
+		echo "$y"
+		i=$(($i+1))
+	done
+}
+
+# The GIT_TEST_FAIL_PREREQS code hooks into test_set_prereq(), and
+# thus needs to be set up really early, and set an internal variable
+# for convenience so the hot test_set_prereq() codepath doesn't need
+# to call "git env--helper". Only do that work if needed by seeing if
+# GIT_TEST_FAIL_PREREQS is set at all.
+GIT_TEST_FAIL_PREREQS_INTERNAL=
+if test -n "$GIT_TEST_FAIL_PREREQS"
+then
+	if git env--helper --type=bool --default=0 --exit-code GIT_TEST_FAIL_PREREQS
+	then
+		GIT_TEST_FAIL_PREREQS_INTERNAL=true
+		test_set_prereq FAIL_PREREQS
+	fi
+else
+	test_lazy_prereq FAIL_PREREQS '
+		git env--helper --type=bool --default=0 --exit-code GIT_TEST_FAIL_PREREQS
+	'
+fi
+
+# Fix some commands on Windows
+uname_s=$(uname -s)
+case $uname_s in
+*MINGW*)
+	# Windows has its own (incompatible) sort and find
+	sort () {
+		/usr/bin/sort "$@"
+	}
+	find () {
+		/usr/bin/find "$@"
+	}
+	# git sees Windows-style pwd
+	pwd () {
+		builtin pwd -W
+	}
+	# no POSIX permissions
+	# backslashes in pathspec are converted to '/'
+	# exec does not inherit the PID
+	test_set_prereq MINGW
+	test_set_prereq NATIVE_CRLF
+	test_set_prereq SED_STRIPS_CR
+	test_set_prereq GREP_STRIPS_CR
+	GIT_TEST_CMP=mingw_test_cmp
+	;;
+*CYGWIN*)
+	test_set_prereq POSIXPERM
+	test_set_prereq EXECKEEPSPID
+	test_set_prereq CYGWIN
+	test_set_prereq SED_STRIPS_CR
+	test_set_prereq GREP_STRIPS_CR
+	;;
+*)
+	test_set_prereq POSIXPERM
+	test_set_prereq BSLASHPSPEC
+	test_set_prereq EXECKEEPSPID
+	;;
+esac
+
+( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
+test -z "$NO_PERL" && test_set_prereq PERL
+test -z "$NO_PTHREADS" && test_set_prereq PTHREADS
+test -z "$NO_PYTHON" && test_set_prereq PYTHON
+test -n "$USE_LIBPCRE1$USE_LIBPCRE2" && test_set_prereq PCRE
+test -n "$USE_LIBPCRE1" && test_set_prereq LIBPCRE1
+test -n "$USE_LIBPCRE2" && test_set_prereq LIBPCRE2
+test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
+
+if test -n "$GIT_TEST_GETTEXT_POISON_ORIG"
+then
+	GIT_TEST_GETTEXT_POISON=$GIT_TEST_GETTEXT_POISON_ORIG
+	export GIT_TEST_GETTEXT_POISON
+	unset GIT_TEST_GETTEXT_POISON_ORIG
+fi
+
+test_lazy_prereq C_LOCALE_OUTPUT '
+	! git env--helper --type=bool --default=0 --exit-code GIT_TEST_GETTEXT_POISON
+'
+
+if test -z "$GIT_TEST_CHECK_CACHE_TREE"
+then
+	GIT_TEST_CHECK_CACHE_TREE=true
+	export GIT_TEST_CHECK_CACHE_TREE
+fi
+
+test_lazy_prereq PIPE '
+	# test whether the filesystem supports FIFOs
+	test_have_prereq !MINGW,!CYGWIN &&
+	rm -f testfifo && mkfifo testfifo
+'
+
+test_lazy_prereq SYMLINKS '
+	# test whether the filesystem supports symbolic links
+	ln -s x y && test -h y
+'
+
+test_lazy_prereq FILEMODE '
+	test "$(git config --bool core.filemode)" = true
+'
+
+test_lazy_prereq CASE_INSENSITIVE_FS '
+	echo good >CamelCase &&
+	echo bad >camelcase &&
+	test "$(cat CamelCase)" != good
+'
+
+test_lazy_prereq FUNNYNAMES '
+	test_have_prereq !MINGW &&
+	touch -- \
+		"FUNNYNAMES tab	embedded" \
+		"FUNNYNAMES \"quote embedded\"" \
+		"FUNNYNAMES newline
+embedded" 2>/dev/null &&
+	rm -- \
+		"FUNNYNAMES tab	embedded" \
+		"FUNNYNAMES \"quote embedded\"" \
+		"FUNNYNAMES newline
+embedded" 2>/dev/null
+'
+
+test_lazy_prereq UTF8_NFD_TO_NFC '
+	# check whether FS converts nfd unicode to nfc
+	auml=$(printf "\303\244")
+	aumlcdiar=$(printf "\141\314\210")
+	>"$auml" &&
+	test -f "$aumlcdiar"
+'
+
+test_lazy_prereq AUTOIDENT '
+	sane_unset GIT_AUTHOR_NAME &&
+	sane_unset GIT_AUTHOR_EMAIL &&
+	git var GIT_AUTHOR_IDENT
+'
+
+test_lazy_prereq EXPENSIVE '
+	test -n "$GIT_TEST_LONG"
+'
+
+test_lazy_prereq EXPENSIVE_ON_WINDOWS '
+	test_have_prereq EXPENSIVE || test_have_prereq !MINGW,!CYGWIN
+'
+
+test_lazy_prereq USR_BIN_TIME '
+	test -x /usr/bin/time
+'
+
+test_lazy_prereq NOT_ROOT '
+	uid=$(id -u) &&
+	test "$uid" != 0
+'
+
+test_lazy_prereq JGIT '
+	jgit --version
+'
+
+# SANITY is about "can you correctly predict what the filesystem would
+# do by only looking at the permission bits of the files and
+# directories?"  A typical example of !SANITY is running the test
+# suite as root, where a test may expect "chmod -r file && cat file"
+# to fail because file is supposed to be unreadable after a successful
+# chmod.  In an environment (i.e. combination of what filesystem is
+# being used and who is running the tests) that lacks SANITY, you may
+# be able to delete or create a file when the containing directory
+# doesn't have write permissions, or access a file even if the
+# containing directory doesn't have read or execute permissions.
+
+test_lazy_prereq SANITY '
+	mkdir SANETESTD.1 SANETESTD.2 &&
+
+	chmod +w SANETESTD.1 SANETESTD.2 &&
+	>SANETESTD.1/x 2>SANETESTD.2/x &&
+	chmod -w SANETESTD.1 &&
+	chmod -r SANETESTD.1/x &&
+	chmod -rx SANETESTD.2 ||
+	BUG "cannot prepare SANETESTD"
+
+	! test -r SANETESTD.1/x &&
+	! rm SANETESTD.1/x && ! test -f SANETESTD.2/x
+	status=$?
+
+	chmod +rwx SANETESTD.1 SANETESTD.2 &&
+	rm -rf SANETESTD.1 SANETESTD.2 ||
+	BUG "cannot clean SANETESTD"
+	return $status
+'
+
+test FreeBSD != $uname_s || GIT_UNZIP=${GIT_UNZIP:-/usr/local/bin/unzip}
+GIT_UNZIP=${GIT_UNZIP:-unzip}
+test_lazy_prereq UNZIP '
+	"$GIT_UNZIP" -v
+	test $? -ne 127
+'
+
+run_with_limited_cmdline () {
+	(ulimit -s 128 && "$@")
+}
+
+test_lazy_prereq CMDLINE_LIMIT '
+	test_have_prereq !MINGW,!CYGWIN &&
+	run_with_limited_cmdline true
+'
+
+run_with_limited_stack () {
+	(ulimit -s 128 && "$@")
+}
+
+test_lazy_prereq ULIMIT_STACK_SIZE '
+	test_have_prereq !MINGW,!CYGWIN &&
+	run_with_limited_stack true
+'
+
+build_option () {
+	git version --build-options |
+	sed -ne "s/^$1: //p"
+}
+
+test_lazy_prereq LONG_IS_64BIT '
+	test 8 -le "$(build_option sizeof-long)"
+'
+
+test_lazy_prereq TIME_IS_64BIT 'test-tool date is64bit'
+test_lazy_prereq TIME_T_IS_64BIT 'test-tool date time_t-is64bit'
+
+test_lazy_prereq CURL '
+	curl --version
+'
+
+# SHA1 is a test if the hash algorithm in use is SHA-1.  This is both for tests
+# which will not work with other hash algorithms and tests that work but don't
+# test anything meaningful (e.g. special values which cause short collisions).
+test_lazy_prereq SHA1 '
+	test $(git hash-object /dev/null) = e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
+'
+
+test_lazy_prereq REBASE_P '
+	test -z "$GIT_TEST_SKIP_REBASE_P"
+'