merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 143 insertions, 64 deletions

diff --git a/third_party/git/t/test-lib.sh b/third_party/git/t/test-lib.sh
index 30b07e310f59..ef31f4003747 100644
--- a/third_party/git/t/test-lib.sh
+++ b/third_party/git/t/test-lib.sh
@@ -78,20 +78,23 @@ then
 	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"
+opt_required_arg=
+# $1: option string
+# $2: name of the var where the arg will be stored
+mark_option_requires_arg () {
+	if test -n "$opt_required_arg"
 	then
-		eval $store_arg_to=\$opt
-		store_arg_to=
-		prev_opt=
-		continue
+		echo "error: options that require args cannot be bundled" \
+			"together: '$opt_required_arg' and '$1'" >&2
+		exit 1
 	fi
+	opt_required_arg=$1
+	store_arg_to=$2
+}
+
+parse_option () {
+	local opt="$1"
 
 	case "$opt" in
 	-d|--d|--de|--deb|--debu|--debug)
@@ -101,7 +104,7 @@ do
 	-l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 		GIT_TEST_LONG=t; export GIT_TEST_LONG ;;
 	-r)
-		store_arg_to=run_list
+		mark_option_requires_arg "$opt" run_list
 		;;
 	--run=*)
 		run_list=${opt#--*=} ;;
@@ -185,12 +188,42 @@ do
 	*)
 		echo "error: unknown test option '$opt'" >&2; exit 1 ;;
 	esac
+}
 
-	prev_opt=$opt
+# Parse options while taking care to leave $@ intact, so we will still
+# have all the original command line options when executing the test
+# script again for '--tee' and '--verbose-log' later.
+for opt
+do
+	if test -n "$store_arg_to"
+	then
+		eval $store_arg_to=\$opt
+		store_arg_to=
+		opt_required_arg=
+		continue
+	fi
+
+	case "$opt" in
+	--*|-?)
+		parse_option "$opt" ;;
+	-?*)
+		# bundled short options must be fed separately to parse_option
+		opt=${opt#-}
+		while test -n "$opt"
+		do
+			extra=${opt#?}
+			this=${opt%$extra}
+			opt=$extra
+			parse_option "-$this"
+		done
+		;;
+	*)
+		echo "error: unknown test option '$opt'" >&2; exit 1 ;;
+	esac
 done
 if test -n "$store_arg_to"
 then
-	echo "error: $prev_opt requires an argument" >&2
+	echo "error: $opt_required_arg requires an argument" >&2
 	exit 1
 fi
 
@@ -212,6 +245,8 @@ fi
 
 TEST_STRESS_JOB_SFX="${GIT_TEST_STRESS_JOB_NR:+.stress-$GIT_TEST_STRESS_JOB_NR}"
 TEST_NAME="$(basename "$0" .sh)"
+TEST_NUMBER="${TEST_NAME%%-*}"
+TEST_NUMBER="${TEST_NUMBER#t}"
 TEST_RESULTS_DIR="$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"
@@ -402,17 +437,27 @@ unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
 unset XDG_CACHE_HOME
 unset XDG_CONFIG_HOME
 unset GITPERLLIB
-GIT_AUTHOR_EMAIL=author@example.com
+TEST_AUTHOR_LOCALNAME=author
+TEST_AUTHOR_DOMAIN=example.com
+GIT_AUTHOR_EMAIL=${TEST_AUTHOR_LOCALNAME}@${TEST_AUTHOR_DOMAIN}
 GIT_AUTHOR_NAME='A U Thor'
-GIT_COMMITTER_EMAIL=committer@example.com
+GIT_AUTHOR_DATE='1112354055 +0200'
+TEST_COMMITTER_LOCALNAME=committer
+TEST_COMMITTER_DOMAIN=example.com
+GIT_COMMITTER_EMAIL=${TEST_COMMITTER_LOCALNAME}@${TEST_COMMITTER_DOMAIN}
 GIT_COMMITTER_NAME='C O Mitter'
+GIT_COMMITTER_DATE='1112354055 +0200'
 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 GIT_COMMITTER_DATE GIT_AUTHOR_DATE
 export EDITOR
 
+GIT_DEFAULT_HASH="${GIT_TEST_DEFAULT_HASH:-sha1}"
+export GIT_DEFAULT_HASH
+
 # Tests using GIT_TRACE typically don't want <timestamp> <file>:<line> output
 GIT_TRACE_BARE=1
 export GIT_TRACE_BARE
@@ -488,25 +533,13 @@ case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
 	;;
 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='
 '
 
+# Single quote
+SQ=\'
+
 # UTF-8 ZERO WIDTH NON-JOINER, which HFS+ ignores
 # when case-folding filenames
 u200c=$(printf '\342\200\214')
@@ -567,6 +600,7 @@ export TERM
 
 error () {
 	say_color error "error: $*"
+	finalize_junit_xml
 	GIT_EXIT_OK=t
 	exit 1
 }
@@ -695,7 +729,7 @@ test_failure_ () {
 	say_color error "not ok $test_count - $1"
 	shift
 	printf '%s\n' "$*" | sed -e 's/^/#	/'
-	test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
+	test "$immediate" = "" || { finalize_junit_xml; GIT_EXIT_OK=t; exit 1; }
 }
 
 test_known_broken_ok_ () {
@@ -872,6 +906,7 @@ maybe_setup_valgrind () {
 	fi
 }
 
+trace_level_=0
 want_trace () {
 	test "$trace" = t && {
 		test "$verbose" = t || test "$verbose_log" = t
@@ -885,7 +920,7 @@ want_trace () {
 test_eval_inner_ () {
 	# Do not add anything extra (including LF) after '$*'
 	eval "
-		want_trace && set -x
+		want_trace && trace_level_=$(($trace_level_+1)) && set -x
 		$*"
 }
 
@@ -916,7 +951,8 @@ test_eval_ () {
 		test_eval_ret_=$?
 		if want_trace
 		then
-			set +x
+			test 1 = $trace_level_ && set +x
+			trace_level_=$(($trace_level_-1))
 		fi
 	} 2>/dev/null 4>&2
 
@@ -994,6 +1030,12 @@ test_skip () {
 		to_skip=t
 		skipped_reason="GIT_SKIP_TESTS"
 	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
 	if test -z "$to_skip" && test -n "$test_prereq" &&
 	   ! test_have_prereq "$test_prereq"
 	then
@@ -1006,12 +1048,6 @@ test_skip () {
 		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)
@@ -1063,6 +1099,27 @@ write_junit_xml_testcase () {
 	junit_have_testcase=t
 }
 
+finalize_junit_xml () {
+	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 -e "s/\(<testsuite.*\) time=\"[^\"]*\"/\1/" \
+			-e "s/<testsuite [^>]*/& time=\"$junit_time\"/" \
+			-e '/^ *<\/testsuite/d' \
+			<"$junit_xml_path" >"$junit_xml_path.new"
+		mv "$junit_xml_path.new" "$junit_xml_path"
+
+		write_junit_xml "  </testsuite>" "</testsuites>"
+		write_junit_xml=
+	fi
+}
+
 test_atexit_cleanup=:
 test_atexit_handler () {
 	# In a succeeding test script 'test_atexit_handler' is invoked
@@ -1085,21 +1142,7 @@ test_done () {
 	# 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
+	finalize_junit_xml
 
 	if test -z "$HARNESS_ACTIVE"
 	then
@@ -1367,6 +1410,21 @@ then
 	fi
 fi
 
+# 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$_x05"
+
+test_oid_init
+
+ZERO_OID=$(test_oid zero)
+OID_REGEX=$(echo $ZERO_OID | sed -e 's/0/[0-9a-f]/g')
+OIDPATH_REGEX=$(test_oid_to_path $ZERO_OID | sed -e 's/0/[0-9a-f]/g')
+EMPTY_TREE=$(test_oid empty_tree)
+EMPTY_BLOB=$(test_oid empty_blob)
+_z40=$ZERO_OID
+
 # 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
@@ -1391,23 +1449,23 @@ yes () {
 # 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.
+# to call "git env--helper" (via test_bool_env). 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
+	if test_bool_env GIT_TEST_FAIL_PREREQS false
 	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
+		test_bool_env GIT_TEST_FAIL_PREREQS false
 	'
 fi
 
-# Fix some commands on Windows
+# Fix some commands on Windows, and other OS-specific things
 uname_s=$(uname -s)
 case $uname_s in
 *MINGW*)
@@ -1445,6 +1503,14 @@ case $uname_s in
 	;;
 esac
 
+# Detect arches where a few things don't work
+uname_m=$(uname -m)
+case $uname_m in
+parisc* | hppa*)
+	test_set_prereq HPPA
+	;;
+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
@@ -1462,7 +1528,7 @@ then
 fi
 
 test_lazy_prereq C_LOCALE_OUTPUT '
-	! git env--helper --type=bool --default=0 --exit-code GIT_TEST_GETTEXT_POISON
+	! test_bool_env GIT_TEST_GETTEXT_POISON false
 '
 
 if test -z "$GIT_TEST_CHECK_CACHE_TREE"
@@ -1584,7 +1650,7 @@ run_with_limited_cmdline () {
 }
 
 test_lazy_prereq CMDLINE_LIMIT '
-	test_have_prereq !MINGW,!CYGWIN &&
+	test_have_prereq !HPPA,!MINGW,!CYGWIN &&
 	run_with_limited_cmdline true
 '
 
@@ -1593,10 +1659,19 @@ run_with_limited_stack () {
 }
 
 test_lazy_prereq ULIMIT_STACK_SIZE '
-	test_have_prereq !MINGW,!CYGWIN &&
+	test_have_prereq !HPPA,!MINGW,!CYGWIN &&
 	run_with_limited_stack true
 '
 
+run_with_limited_open_files () {
+	(ulimit -n 32 && "$@")
+}
+
+test_lazy_prereq ULIMIT_FILE_DESCRIPTORS '
+	test_have_prereq !MINGW,!CYGWIN &&
+	run_with_limited_open_files true
+'
+
 build_option () {
 	git version --build-options |
 	sed -ne "s/^$1: //p"
@@ -1617,7 +1692,11 @@ test_lazy_prereq CURL '
 # 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 $(git hash-object /dev/null) = e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
+	case "$GIT_DEFAULT_HASH" in
+	sha1) true ;;
+	"") test $(git hash-object /dev/null) = e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 ;;
+	*) false ;;
+	esac
 '
 
 test_lazy_prereq REBASE_P '