Merge branch 'ps/test-wo-perl-prereq' into ps/fewer-perl

* ps/test-wo-perl-prereq: t5703: refactor test to not depend on Perl t5316: refactor `max_chain()` to not depend on Perl t0210: refactor trace2 scrubbing to not use Perl t0021: refactor `generate_random_characters()` to not depend on Perl t/lib-httpd: refactor "one-time-perl" CGI script to not depend on Perl t/lib-t6000: refactor `name_from_description()` to not depend on Perl t/lib-gpg: refactor `sanitize_pgp()` to not depend on Perl t: refactor tests depending on Perl for textconv scripts t: refactor tests depending on Perl to print data t: refactor tests depending on Perl substitution operator t: refactor tests depending on Perl transliteration operator Makefile: stop requiring Perl when running tests meson: stop requiring Perl when tests are enabled t: adapt existing PERL prerequisites t: introduce PERL_TEST_HELPERS prerequisite t: adapt `test_readlink()` to not use Perl t: adapt `test_copy_bytes()` to not use Perl t: adapt character translation helpers to not use Perl t: refactor environment sanitization to not use Perl t: skip chain lint when PERL_PATH is unset
2025-12-12 20:36:24 +01:00 · 2025-04-15 08:28:51 -07:00
parent 485f5f8636 7a7b602267
commit 55f7879f57
84 changed files with 471 additions and 373 deletions
--- a/meson.build
+++ b/meson.build
@@ -779,7 +779,7 @@ endif
 # features. It is optional if you want to neither execute tests nor use any of
 # these optional features.
 perl_required = get_option('perl')
-if get_option('tests') or get_option('gitweb').enabled() or 'netrc' in get_option('credential_helpers') or get_option('docs') != []
+if get_option('gitweb').enabled() or 'netrc' in get_option('credential_helpers') or get_option('docs') != []
  perl_required = true
 endif

--- a/t/Makefile
+++ b/t/Makefile
@@ -59,16 +59,21 @@ CHAINLINTSUPPRESS = GIT_TEST_EXT_CHAIN_LINT=0 && export GIT_TEST_EXT_CHAIN_LINT

 all:: $(DEFAULT_TEST_TARGET)

-test: pre-clean check-chainlint check-meson $(TEST_LINT)
+test: pre-clean check-meson $(TEST_LINT)
 	$(CHAINLINTSUPPRESS) $(MAKE) aggregate-results-and-cleanup

+ifneq ($(PERL_PATH),)
+test: check-chainlint
+prove: check-chainlint
+endif
+
 failed:
 	@failed=$$(cd '$(TEST_RESULTS_DIRECTORY_SQ)' && \
 		grep -l '^failed [1-9]' *.counts | \
 		sed -n 's/\.counts$$/.sh/p') && \
 	test -z "$$failed" || $(MAKE) $$failed

-prove: pre-clean check-chainlint $(TEST_LINT)
+prove: pre-clean $(TEST_LINT)
 	@echo "*** prove (shell & unit tests) ***"
 	@$(CHAINLINTSUPPRESS) TEST_OPTIONS='$(GIT_TEST_OPTS)' TEST_SHELL_PATH='$(TEST_SHELL_PATH_SQ)' $(PROVE) --exec ./run-test.sh $(GIT_PROVE_OPTS) $(T) $(UNIT_TESTS)
 	$(MAKE) clean-except-prove-cache
@@ -132,8 +137,13 @@ check-meson:
 		fi; \
 	done

-test-lint: test-lint-duplicates test-lint-executable test-lint-shell-syntax \
+test-lint: test-lint-duplicates test-lint-executable \
 	test-lint-filenames
+ifneq ($(PERL_PATH),)
+test-lint: test-lint-shell-syntax
+else
+GIT_TEST_CHAIN_LINT = 0
+endif
 ifneq ($(GIT_TEST_CHAIN_LINT),0)
 test-lint: test-chainlint
 endif
--- a/t/helper/test-path-utils.c
+++ b/t/helper/test-path-utils.c
@@ -323,6 +323,19 @@ int cmd__path_utils(int argc, const char **argv)
 		return 0;
 	}

+	if (argc >= 2 && !strcmp(argv[1], "readlink")) {
+		struct strbuf target = STRBUF_INIT;
+		while (argc > 2) {
+			if (strbuf_readlink(&target, argv[2], 0) < 0)
+				die_errno("cannot read link at '%s'", argv[2]);
+			puts(target.buf);
+			argc--;
+			argv++;
+		}
+		strbuf_release(&target);
+		return 0;
+	}
+
 	if (argc >= 2 && !strcmp(argv[1], "absolute_path")) {
 		while (argc > 2) {
 			puts(absolute_path(argv[2]));
--- a/t/helper/test-sha1.sh
+++ b/t/helper/test-sha1.sh
@@ -15,7 +15,7 @@ do
 			{
 				test -z "$pfx" || echo "$pfx"
 				dd if=/dev/zero bs=1048576 count=$cnt 2>/dev/null |
-				perl -pe 'y/\000/g/'
+				tr "\000" "g"
 			} | ./t/helper/test-tool $sha1 $cnt
 		)
 		if test "$expect" = "$actual"
@@ -61,7 +61,7 @@ do
 		{
 			test -z "$pfx" || echo "$pfx"
 			dd if=/dev/zero bs=1048576 count=$cnt 2>/dev/null |
-			perl -pe 'y/\000/g/'
+			tr "\000" "g"
 		} | sha1sum |
 		sed -e 's/ .*//'
 	)
--- a/t/lib-diff.sh
+++ b/t/lib-diff.sh
@@ -21,8 +21,8 @@ compare_diff_raw_z () {
    # Also we do not check SHA1 hash generation in this test, which
    # is a job for t0000-basic.sh

-    perl -pe 'y/\000/\012/' <"$1" | sed -e "$sanitize_diff_raw_z" >.tmp-1
-    perl -pe 'y/\000/\012/' <"$2" | sed -e "$sanitize_diff_raw_z" >.tmp-2
+    tr "\000" "\012" <"$1" | sed -e "$sanitize_diff_raw_z" >.tmp-1
+    tr "\000" "\012" <"$2" | sed -e "$sanitize_diff_raw_z" >.tmp-2
    test_cmp .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
 }

--- a/t/lib-gpg.sh
+++ b/t/lib-gpg.sh
@@ -192,9 +192,5 @@ test_lazy_prereq GPGSSH_VERIFYTIME '
 '

 sanitize_pgp() {
-	perl -ne '
-		/^-----END PGP/ and $in_pgp = 0;
-		print unless $in_pgp;
-		/^-----BEGIN PGP/ and $in_pgp = 1;
-	'
+	sed "/^-----BEGIN PGP/,/^-----END PGP/{/^-/p;d;}"
 }
--- a/t/lib-httpd.sh
+++ b/t/lib-httpd.sh
@@ -165,7 +165,7 @@ prepare_httpd() {
 	install_script broken-smart-http.sh
 	install_script error-smart-http.sh
 	install_script error.sh
-	install_script apply-one-time-perl.sh
+	install_script apply-one-time-script.sh
 	install_script nph-custom-auth.sh

 	ln -s "$LIB_HTTPD_MODULE_PATH" "$HTTPD_ROOT_PATH/modules"
--- a/t/lib-httpd/apache.conf
+++ b/t/lib-httpd/apache.conf
@@ -135,7 +135,7 @@ SetEnv PERL_PATH ${PERL_PATH}
 	SetEnv GIT_EXEC_PATH ${GIT_EXEC_PATH}
 	SetEnv GIT_HTTP_EXPORT_ALL
 </LocationMatch>
-<LocationMatch /one_time_perl/>
+<LocationMatch /one_time_script/>
 	SetEnv GIT_EXEC_PATH ${GIT_EXEC_PATH}
 	SetEnv GIT_HTTP_EXPORT_ALL
 </LocationMatch>
@@ -159,7 +159,7 @@ ScriptAliasMatch /smart_*[^/]*/(.*) ${GIT_EXEC_PATH}/git-http-backend/$1
 ScriptAlias /broken_smart/ broken-smart-http.sh/
 ScriptAlias /error_smart/ error-smart-http.sh/
 ScriptAlias /error/ error.sh/
-ScriptAliasMatch /one_time_perl/(.*) apply-one-time-perl.sh/$1
+ScriptAliasMatch /one_time_script/(.*) apply-one-time-script.sh/$1
 ScriptAliasMatch /custom_auth/(.*) nph-custom-auth.sh/$1
 <Directory ${GIT_EXEC_PATH}>
 	Options FollowSymlinks
@@ -182,7 +182,7 @@ ScriptAliasMatch /custom_auth/(.*) nph-custom-auth.sh/$1
 <Files error.sh>
  Options ExecCGI
 </Files>
-<Files apply-one-time-perl.sh>
+<Files apply-one-time-script.sh>
 	Options ExecCGI
 </Files>
 <Files ${GIT_EXEC_PATH}/git-http-backend>
--- a/t/lib-httpd/apply-one-time-perl.sh
+++ b/t/lib-httpd/apply-one-time-perl.sh
@@ -1,27 +0,0 @@
-#!/bin/sh
-
-# If "one-time-perl" exists in $HTTPD_ROOT_PATH, run perl on the HTTP response,
-# using the contents of "one-time-perl" as the perl command to be run. If the
-# response was modified as a result, delete "one-time-perl" so that subsequent
-# HTTP responses are no longer modified.
-#
-# This can be used to simulate the effects of the repository changing in
-# between HTTP request-response pairs.
-if test -f one-time-perl
-then
-	LC_ALL=C
-	export LC_ALL
-
-	"$GIT_EXEC_PATH/git-http-backend" >out
-	"$PERL_PATH" -pe "$(cat one-time-perl)" out >out_modified
-
-	if cmp -s out out_modified
-	then
-		cat out
-	else
-		cat out_modified
-		rm one-time-perl
-	fi
-else
-	"$GIT_EXEC_PATH/git-http-backend"
-fi
--- a/t/lib-httpd/apply-one-time-script.sh
+++ b/t/lib-httpd/apply-one-time-script.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+# If "one-time-script" exists in $HTTPD_ROOT_PATH, run the script on the HTTP
+# response. If the response was modified as a result, delete "one-time-script"
+# so that subsequent HTTP responses are no longer modified.
+#
+# This can be used to simulate the effects of the repository changing in
+# between HTTP request-response pairs.
+if test -f one-time-script
+then
+	LC_ALL=C
+	export LC_ALL
+
+	"$GIT_EXEC_PATH/git-http-backend" >out
+	./one-time-script out >out_modified
+
+	if cmp -s out out_modified
+	then
+		cat out
+	else
+		cat out_modified
+		rm one-time-script
+	fi
+else
+	"$GIT_EXEC_PATH/git-http-backend"
+fi
--- a/t/lib-t6000.sh
+++ b/t/lib-t6000.sh
@@ -109,13 +109,12 @@ check_output () {
 # All alphanums translated into -'s which are then compressed and stripped
 # from front and back.
 name_from_description () {
-	perl -pe '
-		s/[^A-Za-z0-9.]/-/g;
-		s/-+/-/g;
-		s/-$//;
-		s/^-//;
-		y/A-Z/a-z/;
-	'
+	sed \
+		-e 's/[^A-Za-z0-9.]/-/g' \
+		-e 's/--*/-/g' \
+		-e 's/-$//' \
+		-e 's/^-//' \
+		-e 'y/A-Z/a-z/'
 }


--- a/t/t0008-ignores.sh
+++ b/t/t0008-ignores.sh
@@ -39,11 +39,11 @@ test_stderr () {
 }

 broken_c_unquote () {
-	"$PERL_PATH" -pe 's/^"//; s/\\//; s/"$//; tr/\n/\0/' "$@"
+	sed -e 's/^"//' -e 's/\\//' -e 's/"$//' "$1" | tr '\n' '\0'
 }

 broken_c_unquote_verbose () {
-	"$PERL_PATH" -pe 's/	"/	/; s/\\//; s/"$//; tr/:\t\n/\0/' "$@"
+	sed -e 's/	"/	/' -e 's/\\//' -e 's/"$//' "$1" | tr ':\t\n' '\000'
 }

 stderr_contains () {
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -20,8 +20,7 @@ EOF
 generate_random_characters () {
 	LEN=$1
 	NAME=$2
-	test-tool genrandom some-seed $LEN |
-		perl -pe "s/./chr((ord($&) % 26) + ord('a'))/sge" >"$TEST_ROOT/$NAME"
+	test-tool genrandom some-seed | tr -dc 'a-z' | test_copy_bytes "$LEN" >"$TEST_ROOT/$NAME"
 }

 filter_git () {
@@ -841,7 +840,7 @@ test_expect_success 'process filter abort stops processing of all further files'
 	)
 '

-test_expect_success PERL 'invalid process filter must fail (and not hang!)' '
+test_expect_success 'invalid process filter must fail (and not hang!)' '
 	test_config_global filter.protocol.process cat &&
 	test_config_global filter.protocol.required true &&
 	rm -rf repo &&
@@ -1111,19 +1110,19 @@ do
 	branch) opt='-f HEAD' ;;
 	esac

-	test_expect_success PERL,TTY "delayed checkout shows progress by default on tty ($mode checkout)" '
+	test_expect_success TTY "delayed checkout shows progress by default on tty ($mode checkout)" '
 		test_delayed_checkout_progress test_terminal git checkout $opt
 	'

-	test_expect_success PERL "delayed checkout omits progress on non-tty ($mode checkout)" '
+	test_expect_success "delayed checkout omits progress on non-tty ($mode checkout)" '
 		test_delayed_checkout_progress ! git checkout $opt
 	'

-	test_expect_success PERL,TTY "delayed checkout omits progress with --quiet ($mode checkout)" '
+	test_expect_success TTY "delayed checkout omits progress with --quiet ($mode checkout)" '
 		test_delayed_checkout_progress ! test_terminal git checkout --quiet $opt
 	'

-	test_expect_success PERL,TTY "delayed checkout honors --[no]-progress ($mode checkout)" '
+	test_expect_success TTY "delayed checkout honors --[no]-progress ($mode checkout)" '
 		test_delayed_checkout_progress ! test_terminal git checkout --no-progress $opt &&
 		test_delayed_checkout_progress test_terminal git checkout --quiet --progress $opt
 	'
--- a/t/t0090-cache-tree.sh
+++ b/t/t0090-cache-tree.sh
@@ -128,7 +128,7 @@ test_expect_success 'second commit has cache-tree' '
 	test_cache_tree
 '

-test_expect_success PERL 'commit --interactive gives cache-tree on partial commit' '
+test_expect_success 'commit --interactive gives cache-tree on partial commit' '
 	test_when_finished "git reset --hard" &&
 	cat <<-\EOT >foo.c &&
 	int foo()
@@ -162,7 +162,7 @@ test_expect_success PERL 'commit --interactive gives cache-tree on partial commi
 	test_cache_tree expected.status
 '

-test_expect_success PERL 'commit -p with shrinking cache-tree' '
+test_expect_success 'commit -p with shrinking cache-tree' '
 	mkdir -p deep/very-long-subdir &&
 	echo content >deep/very-long-subdir/file &&
 	git add deep &&
--- a/t/t0210-trace2-normal.sh
+++ b/t/t0210-trace2-normal.sh
@@ -53,10 +53,41 @@ GIT_TRACE2_BRIEF=1 && export GIT_TRACE2_BRIEF
 #
 # Implicit return from cmd_<verb> function propagates <code>.

+scrub_normal () {
+	# Scrub the variable fields from the normal trace2 output to make
+	# testing easier:
+	#
+	#   1. Various messages include an elapsed time in the middle of the
+	#      message. Replace the time with a placeholder to simplify our
+	#      HEREDOC in the test script.
+	#
+	#   2. We expect:
+	#
+	#        start <argv0> [<argv1> [<argv2> [...]]]
+	#
+	#      where argv0 might be a relative or absolute path, with or
+	#      without quotes, and platform dependent. Replace argv0 with a
+	#      token for HEREDOC matching in the test script.
+	#
+	#   3. Likewise, the 'cmd_path' message breaks out argv[0].
+	#
+	#      This line is only emitted when RUNTIME_PREFIX is defined,
+	#      so just omit it for testing purposes.
+	#
+	#   4. 'cmd_ancestry' is not implemented everywhere, so for portability's
+	#      sake, skip it when parsing normal.
+	sed \
+		-e 's/elapsed:[0-9]*\.[0-9][0-9]*\([eE][-+]\{0,1\}[0-9][0-9]*\)\{0,1\}/elapsed:_TIME_/g' \
+		-e "s/^start '[^']*' \(.*\)/start _EXE_ \1/" \
+		-e 's/^start [^ ][^ ]* \(.*\)/start _EXE_ \1/' \
+		-e '/^cmd_path/d' \
+		-e '/^cmd_ancestry/d'
+}
+
 test_expect_success 'normal stream, return code 0' '
 	test_when_finished "rm trace.normal actual expect" &&
 	GIT_TRACE2="$(pwd)/trace.normal" test-tool trace2 001return 0 &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 001return 0
@@ -70,7 +101,7 @@ test_expect_success 'normal stream, return code 0' '
 test_expect_success 'normal stream, return code 1' '
 	test_when_finished "rm trace.normal actual expect" &&
 	test_must_fail env GIT_TRACE2="$(pwd)/trace.normal" test-tool trace2 001return 1 &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 001return 1
@@ -85,7 +116,7 @@ test_expect_success 'automatic filename' '
 	test_when_finished "rm -r traces actual expect" &&
 	mkdir traces &&
 	GIT_TRACE2="$(pwd)/traces" test-tool trace2 001return 0 &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <"$(ls traces/*)" >actual &&
+	scrub_normal <"$(ls traces/*)" >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 001return 0
@@ -103,7 +134,7 @@ test_expect_success 'automatic filename' '
 test_expect_success 'normal stream, exit code 0' '
 	test_when_finished "rm trace.normal actual expect" &&
 	GIT_TRACE2="$(pwd)/trace.normal" test-tool trace2 002exit 0 &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 002exit 0
@@ -117,7 +148,7 @@ test_expect_success 'normal stream, exit code 0' '
 test_expect_success 'normal stream, exit code 1' '
 	test_when_finished "rm trace.normal actual expect" &&
 	test_must_fail env GIT_TRACE2="$(pwd)/trace.normal" test-tool trace2 002exit 1 &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 002exit 1
@@ -135,7 +166,7 @@ test_expect_success 'normal stream, exit code 1' '
 test_expect_success 'normal stream, error event' '
 	test_when_finished "rm trace.normal actual expect" &&
 	GIT_TRACE2="$(pwd)/trace.normal" test-tool trace2 003error "hello world" "this is a test" &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 003error '\''hello world'\'' '\''this is a test'\''
@@ -155,7 +186,7 @@ test_expect_success 'normal stream, error event' '
 test_expect_success 'BUG messages are written to trace2' '
 	test_when_finished "rm trace.normal actual expect" &&
 	test_must_fail env GIT_TRACE2="$(pwd)/trace.normal" test-tool trace2 007bug &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 007bug
@@ -179,7 +210,7 @@ test_expect_success 'bug messages with BUG_if_bug() are written to trace2' '
 	sed "s/^.*: //" <err >actual &&
 	test_cmp expect actual &&

-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 008bug
@@ -205,7 +236,7 @@ test_expect_success 'bug messages without explicit BUG_if_bug() are written to t
 	sed "s/^.*: //" <err >actual &&
 	test_cmp expect actual &&

-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 009bug_BUG
@@ -230,7 +261,7 @@ test_expect_success 'bug messages followed by BUG() are written to trace2' '
 	sed "s/^.*: //" <err >actual &&
 	test_cmp expect actual &&

-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 010bug_BUG
@@ -262,7 +293,7 @@ test_expect_success 'using global config, normal stream, return code 0' '
 	test_config_global trace2.normalBrief 1 &&
 	test_config_global trace2.normalTarget "$(pwd)/trace.normal" &&
 	test-tool trace2 001return 0 &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 001return 0
@@ -280,7 +311,7 @@ test_expect_success 'using global config with include' '
 	mv "$(pwd)/.gitconfig" "$(pwd)/real.gitconfig" &&
 	test_config_global include.path "$(pwd)/real.gitconfig" &&
 	test-tool trace2 001return 0 &&
-	perl "$TEST_DIRECTORY/t0210/scrub_normal.perl" <trace.normal >actual &&
+	scrub_normal <trace.normal >actual &&
 	cat >expect <<-EOF &&
 		version $V
 		start _EXE_ trace2 001return 0
--- a/t/t0210/scrub_normal.perl
+++ b/t/t0210/scrub_normal.perl
@@ -1,54 +0,0 @@
-#!/usr/bin/perl
-#
-# Scrub the variable fields from the normal trace2 output to
-# make testing easier.
-
-use strict;
-use warnings;
-
-my $float = '[0-9]*\.[0-9]+([eE][-+]?[0-9]+)?';
-
-# This code assumes that the trace2 data was written with bare
-# turned on (which omits the "<clock> <file>:<line>" prefix.
-
-while (<>) {
-    # Various messages include an elapsed time in the middle
-    # of the message.  Replace the time with a placeholder to
-    # simplify our HEREDOC in the test script.
-    s/elapsed:$float/elapsed:_TIME_/g;
-
-    my $line = $_;
-
-    # we expect:
-    #    start <argv0> [<argv1> [<argv2> [...]]]
-    #
-    # where argv0 might be a relative or absolute path, with
-    # or without quotes, and platform dependent.  Replace argv0
-    # with a token for HEREDOC matching in the test script.
-
-    if ($line =~ m/^start/) {
-	$line =~ /^start\s+(.*)/;
-	my $argv = $1;
-	$argv =~ m/(\'[^\']*\'|[^ ]+)\s+(.*)/;
-	my $argv_0 = $1;
-	my $argv_rest = $2;
-
-	print "start _EXE_ $argv_rest\n";
-    }
-    elsif ($line =~ m/^cmd_path/) {
-	# Likewise, the 'cmd_path' message breaks out argv[0].
-	#
-	# This line is only emitted when RUNTIME_PREFIX is defined,
-	# so just omit it for testing purposes.
-	# print "cmd_path _EXE_\n";
-    }
-    elsif ($line =~ m/^cmd_ancestry/) {
-	# 'cmd_ancestry' is not implemented everywhere, so for portability's
-	# sake, skip it when parsing normal.
-	#
-	# print "$line";
-    }
-    else {
-	print "$line";
-    }
-}
--- a/t/t0211-trace2-perf.sh
+++ b/t/t0211-trace2-perf.sh
@@ -4,6 +4,12 @@ test_description='test trace2 facility (perf target)'

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping trace2 tests; Perl not available'
+	test_done
+fi
+
 # Turn off any inherited trace2 settings for this test.
 sane_unset GIT_TRACE2 GIT_TRACE2_PERF GIT_TRACE2_EVENT
 sane_unset GIT_TRACE2_PERF_BRIEF
--- a/t/t0610-reftable-basics.sh
+++ b/t/t0610-reftable-basics.sh
@@ -653,9 +653,8 @@ test_expect_success 'basic: commit and list refs' '
 test_expect_success 'basic: can write large commit message' '
 	test_when_finished "rm -rf repo" &&
 	git init repo &&
-	perl -e "
-		print \"this is a long commit message\" x 50000
-	" >commit-msg &&
+
+	awk "BEGIN { for (i = 0; i < 50000; i++) printf \"%s\", \"this is a long commit message\" }" >commit-msg &&
 	git -C repo commit --allow-empty --file=../commit-msg
 '

--- a/t/t0613-reftable-write-options.sh
+++ b/t/t0613-reftable-write-options.sh
@@ -145,7 +145,7 @@ test_expect_success 'small block size fails with large reflog message' '
 	(
 		cd repo &&
 		test_commit A &&
-		perl -e "print \"a\" x 500" >logmsg &&
+		test-tool genzeros 500 | tr "\000" "a" >logmsg &&
 		cat >expect <<-EOF &&
 		fatal: update_ref failed for ref ${SQ}refs/heads/logme${SQ}: reftable: transaction failure: entry too large
 		EOF
--- a/t/t1006-cat-file.sh
+++ b/t/t1006-cat-file.sh
@@ -1270,7 +1270,7 @@ extract_batch_output () {
    ' "$@"
 }

-test_expect_success 'cat-file --batch-all-objects --batch ignores replace' '
+test_expect_success PERL_TEST_HELPERS 'cat-file --batch-all-objects --batch ignores replace' '
 	git cat-file --batch-all-objects --batch >actual.raw &&
 	extract_batch_output $orig <actual.raw >actual &&
 	{
@@ -1323,7 +1323,7 @@ test_expect_success 'batch-command flush without --buffer' '
 	grep "^fatal:.*flush is only for --buffer mode.*" err
 '

-script='
+perl_script='
 use warnings;
 use strict;
 use IPC::Open2;
@@ -1345,12 +1345,16 @@ $? == 0 or die "\$?=$?";

 expect="$hello_oid blob $hello_size"

-test_expect_success PERL '--batch-check is unbuffered by default' '
-	perl -e "$script" -- --batch-check $hello_oid "$expect"
+test_lazy_prereq PERL_IPC_OPEN2 '
+	perl -MIPC::Open2 -e "exit 0"
 '

-test_expect_success PERL '--batch-command info is unbuffered by default' '
-	perl -e "$script" -- --batch-command $hello_oid "$expect" "info "
+test_expect_success PERL_IPC_OPEN2 '--batch-check is unbuffered by default' '
+	perl -e "$perl_script" -- --batch-check $hello_oid "$expect"
+'
+
+test_expect_success PERL_IPC_OPEN2 '--batch-command info is unbuffered by default' '
+	perl -e "$perl_script" -- --batch-command $hello_oid "$expect" "info "
 '

 test_done
--- a/t/t1007-hash-object.sh
+++ b/t/t1007-hash-object.sh
@@ -205,7 +205,7 @@ test_expect_success 'too-short tree' '
 	grep "too-short tree object" err
 '

-test_expect_success 'malformed mode in tree' '
+test_expect_success PERL_TEST_HELPERS 'malformed mode in tree' '
 	hex_oid=$(echo foo | git hash-object --stdin -w) &&
 	bin_oid=$(echo $hex_oid | hex2oct) &&
 	printf "9100644 \0$bin_oid" >tree-with-malformed-mode &&
@@ -213,7 +213,7 @@ test_expect_success 'malformed mode in tree' '
 	grep "malformed mode in tree entry" err
 '

-test_expect_success 'empty filename in tree' '
+test_expect_success PERL_TEST_HELPERS 'empty filename in tree' '
 	hex_oid=$(echo foo | git hash-object --stdin -w) &&
 	bin_oid=$(echo $hex_oid | hex2oct) &&
 	printf "100644 \0$bin_oid" >tree-with-empty-filename &&
@@ -221,7 +221,7 @@ test_expect_success 'empty filename in tree' '
 	grep "empty filename in tree entry" err
 '

-test_expect_success 'duplicate filename in tree' '
+test_expect_success PERL_TEST_HELPERS 'duplicate filename in tree' '
 	hex_oid=$(echo foo | git hash-object --stdin -w) &&
 	bin_oid=$(echo $hex_oid | hex2oct) &&
 	{
--- a/t/t1010-mktree.sh
+++ b/t/t1010-mktree.sh
@@ -42,13 +42,13 @@ test_expect_success 'ls-tree piped to mktree (2)' '
 '

 test_expect_success 'ls-tree output in wrong order given to mktree (1)' '
-	perl -e "print reverse <>" <top |
+	sort -r <top |
 	git mktree >actual &&
 	test_cmp tree actual
 '

 test_expect_success 'ls-tree output in wrong order given to mktree (2)' '
-	perl -e "print reverse <>" <top.withsub |
+	sort -r <top.withsub |
 	git mktree >actual &&
 	test_cmp tree.withsub actual
 '
--- a/t/t1450-fsck.sh
+++ b/t/t1450-fsck.sh
@@ -346,7 +346,7 @@ test_expect_success 'unparseable tree object' '
 	test_grep ! "fatal: empty filename in tree entry" out
 '

-test_expect_success 'tree entry with type mismatch' '
+test_expect_success PERL_TEST_HELPERS 'tree entry with type mismatch' '
 	test_when_finished "remove_object \$blob" &&
 	test_when_finished "remove_object \$tree" &&
 	test_when_finished "remove_object \$commit" &&
@@ -364,7 +364,7 @@ test_expect_success 'tree entry with type mismatch' '
 	test_grep ! "dangling blob" out
 '

-test_expect_success 'tree entry with bogus mode' '
+test_expect_success PERL_TEST_HELPERS 'tree entry with bogus mode' '
 	test_when_finished "remove_object \$blob" &&
 	test_when_finished "remove_object \$tree" &&
 	blob=$(echo blob | git hash-object -w --stdin) &&
@@ -984,7 +984,7 @@ corrupt_index_checksum () {

 # Corrupt the checksum on the index and then
 # verify that only fsck notices.
-test_expect_success 'detect corrupt index file in fsck' '
+test_expect_success PERL_TEST_HELPERS 'detect corrupt index file in fsck' '
 	cp .git/index .git/index.backup &&
 	test_when_finished "mv .git/index.backup .git/index" &&
 	corrupt_index_checksum &&
--- a/t/t3300-funny-names.sh
+++ b/t/t3300-funny-names.sh
@@ -70,7 +70,7 @@ test_expect_success 'ls-files -z does not quote funny filename' '
 	tabs	," (dq) and spaces
 	EOF
 	git ls-files -z >ls-files.z &&
-	perl -pe "y/\000/\012/" <ls-files.z >current &&
+	tr "\000" "\012" <ls-files.z >current &&
 	test_cmp expected current
 '

@@ -107,7 +107,7 @@ test_expect_success 'diff-index -z does not quote funny filename' '
 	tabs	," (dq) and spaces
 	EOF
 	git diff-index -z --name-status $t0 >diff-index.z &&
-	perl -pe "y/\000/\012/" <diff-index.z >current &&
+	tr "\000" "\012" <diff-index.z >current &&
 	test_cmp expected current
 '

@@ -117,7 +117,7 @@ test_expect_success 'diff-tree -z does not quote funny filename' '
 	tabs	," (dq) and spaces
 	EOF
 	git diff-tree -z --name-status $t0 $t1 >diff-tree.z &&
-	perl -pe y/\\000/\\012/ <diff-tree.z >current &&
+	tr "\000" "\012" <diff-tree.z >current &&
 	test_cmp expected current
 '

--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -11,6 +11,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-diff.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping diff various tests; Perl not available'
+	test_done
+fi
+
 test_expect_success setup '

 	GIT_AUTHOR_DATE="2006-06-26 00:00:00 +0000" &&
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -448,7 +448,7 @@ cat >>expect.no-threading <<EOF
 ---
 EOF

-test_expect_success 'no threading' '
+test_expect_success PERL_TEST_HELPERS 'no threading' '
 	git checkout side &&
 	check_threading expect.no-threading main
 '
@@ -466,11 +466,11 @@ In-Reply-To: <0>
 References: <0>
 EOF

-test_expect_success 'thread' '
+test_expect_success PERL_TEST_HELPERS 'thread' '
 	check_threading expect.thread --thread main
 '

-test_expect_success '--thread overrides format.thread=deep' '
+test_expect_success PERL_TEST_HELPERS '--thread overrides format.thread=deep' '
 	test_config format.thread deep &&
 	check_threading expect.thread --thread main
 '
@@ -490,7 +490,7 @@ In-Reply-To: <1>
 References: <1>
 EOF

-test_expect_success 'thread in-reply-to' '
+test_expect_success PERL_TEST_HELPERS 'thread in-reply-to' '
 	check_threading expect.in-reply-to --in-reply-to="<test.message>" \
 		--thread main
 '
@@ -512,7 +512,7 @@ In-Reply-To: <0>
 References: <0>
 EOF

-test_expect_success 'thread cover-letter' '
+test_expect_success PERL_TEST_HELPERS 'thread cover-letter' '
 	check_threading expect.cover-letter --cover-letter --thread main
 '

@@ -538,12 +538,12 @@ References: <1>
 	<0>
 EOF

-test_expect_success 'thread cover-letter in-reply-to' '
+test_expect_success PERL_TEST_HELPERS 'thread cover-letter in-reply-to' '
 	check_threading expect.cl-irt --cover-letter \
 		--in-reply-to="<test.message>" --thread main
 '

-test_expect_success 'thread explicit shallow' '
+test_expect_success PERL_TEST_HELPERS 'thread explicit shallow' '
 	check_threading expect.cl-irt --cover-letter \
 		--in-reply-to="<test.message>" --thread=shallow main
 '
@@ -562,7 +562,7 @@ References: <0>
 	<1>
 EOF

-test_expect_success 'thread deep' '
+test_expect_success PERL_TEST_HELPERS 'thread deep' '
 	check_threading expect.deep --thread=deep main
 '

@@ -584,7 +584,7 @@ References: <1>
 	<2>
 EOF

-test_expect_success 'thread deep in-reply-to' '
+test_expect_success PERL_TEST_HELPERS 'thread deep in-reply-to' '
 	check_threading expect.deep-irt  --thread=deep \
 		--in-reply-to="<test.message>" main
 '
@@ -609,7 +609,7 @@ References: <0>
 	<2>
 EOF

-test_expect_success 'thread deep cover-letter' '
+test_expect_success PERL_TEST_HELPERS 'thread deep cover-letter' '
 	check_threading expect.deep-cl --cover-letter --thread=deep main
 '

@@ -638,27 +638,27 @@ References: <1>
 	<3>
 EOF

-test_expect_success 'thread deep cover-letter in-reply-to' '
+test_expect_success PERL_TEST_HELPERS 'thread deep cover-letter in-reply-to' '
 	check_threading expect.deep-cl-irt --cover-letter \
 		--in-reply-to="<test.message>" --thread=deep main
 '

-test_expect_success 'thread via config' '
+test_expect_success PERL_TEST_HELPERS 'thread via config' '
 	test_config format.thread true &&
 	check_threading expect.thread main
 '

-test_expect_success 'thread deep via config' '
+test_expect_success PERL_TEST_HELPERS 'thread deep via config' '
 	test_config format.thread deep &&
 	check_threading expect.deep main
 '

-test_expect_success 'thread config + override' '
+test_expect_success PERL_TEST_HELPERS 'thread config + override' '
 	test_config format.thread deep &&
 	check_threading expect.thread --thread main
 '

-test_expect_success 'thread config + --no-thread' '
+test_expect_success PERL_TEST_HELPERS 'thread config + --no-thread' '
 	test_config format.thread deep &&
 	check_threading expect.no-threading --no-thread main
 '
--- a/t/t4020-diff-external.sh
+++ b/t/t4020-diff-external.sh
@@ -237,7 +237,7 @@ check_external_diff   0 empty  empty 0 on  --quiet
 check_external_diff   1 empty  empty 1 on  --quiet
 check_external_diff 128 empty  error 2 on  --quiet

-echo NULZbetweenZwords | perl -pe 'y/Z/\000/' > file
+echo NULZbetweenZwords | tr "Z" "\000" > file

 test_expect_success 'force diff with "diff"' '
 	after=$(git hash-object file) &&
--- a/t/t4029-diff-trailing-space.sh
+++ b/t/t4029-diff-trailing-space.sh
@@ -31,7 +31,8 @@ test_expect_success "$test_description" '
 	git config --bool diff.suppressBlankEmpty true &&
 	git diff f > actual &&
 	test_cmp exp actual &&
-	perl -i.bak -p -e "s/^\$/ /" exp &&
+	sed "s/^\$/ /" exp >exp.munged &&
+	mv exp.munged exp &&
 	git config --bool diff.suppressBlankEmpty false &&
 	git diff f > actual &&
 	test_cmp exp actual &&
--- a/t/t4030-diff-textconv.sh
+++ b/t/t4030-diff-textconv.sh
@@ -20,13 +20,10 @@ cat >expect.text <<'EOF'
 +1
 EOF

-cat >hexdump <<'EOF'
-#!/bin/sh
-"$PERL_PATH" -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' < "$1"
-EOF
-chmod +x hexdump
-
 test_expect_success 'setup binary file with history' '
+	write_script hexdump <<-\EOF &&
+	tr "\000\001" "01" <"$1"
+	EOF
 	test_commit --printf one file "\\0\\n" &&
 	test_commit --printf --append two file "\\01\\n"
 '
--- a/t/t4031-diff-rewrite-binary.sh
+++ b/t/t4031-diff-rewrite-binary.sh
@@ -57,24 +57,19 @@ test_expect_success 'diff --stat counts binary rewrite as 0 lines' '
 	grep " rewrite file" diff
 '

-{
-	echo "#!$SHELL_PATH"
-	cat <<'EOF'
-"$PERL_PATH" -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' < "$1"
-EOF
-} >dump
-chmod +x dump
-
 test_expect_success 'setup textconv' '
+	write_script dump <<-\EOF &&
+	test-tool hexdump <"$1"
+	EOF
 	echo file diff=foo >.gitattributes &&
 	git config diff.foo.textconv "\"$(pwd)\""/dump
 '

 test_expect_success 'rewrite diff respects textconv' '
 	git diff -B >diff &&
-	grep "dissimilarity index" diff &&
-	grep "^-61" diff &&
-	grep "^-0" diff
+	test_grep "dissimilarity index" diff &&
+	test_grep "^-3d 0a 00" diff &&
+	test_grep "^+3d 0a 01" diff
 '

 test_done
--- a/t/t4058-diff-duplicates.sh
+++ b/t/t4058-diff-duplicates.sh
@@ -13,6 +13,12 @@ test_description='test tree diff when trees have duplicate entries'

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping diff duplicates tests; Perl not available'
+	test_done
+fi
+
 # make_tree_entry <mode> <mode> <sha1>
 #
 # We have to rely on perl here because not all printfs understand
--- a/t/t4103-apply-binary.sh
+++ b/t/t4103-apply-binary.sh
@@ -26,10 +26,10 @@ test_expect_success 'setup' '
 	git commit -m "Initial Version" 2>/dev/null &&

 	git checkout -b binary &&
-	perl -pe "y/x/\000/" <file1 >file3 &&
+	tr "x" "\000" <file1 >file3 &&
 	cat file3 >file4 &&
 	git add file2 &&
-	perl -pe "y/\000/v/" <file3 >file1 &&
+	tr "y" "\000" <file3 >file1 &&
 	rm -f file2 &&
 	git update-index --add --remove file1 file2 file3 file4 &&
 	git commit -m "Second Version" &&
@@ -158,7 +158,7 @@ test_expect_success 'apply binary -p0 diff' '
 	test -z "$(git diff --name-status binary -- file3)"
 '

-test_expect_success 'reject truncated binary diff' '
+test_expect_success PERL_TEST_HELPERS 'reject truncated binary diff' '
 	do_reset &&

 	# this length is calculated to get us very close to
--- a/t/t4116-apply-reverse.sh
+++ b/t/t4116-apply-reverse.sh
@@ -13,14 +13,14 @@ test_description='git apply in reverse
 test_expect_success setup '

 	test_write_lines a b c d e f g h i j k l m n >file1 &&
-	perl -pe "y/ijk/\\000\\001\\002/" <file1 >file2 &&
+	tr "ijk" "\000\001\002" <file1 >file2 &&

 	git add file1 file2 &&
 	git commit -m initial &&
 	git tag initial &&

 	test_write_lines a b c g h i J K L m o n p q >file1 &&
-	perl -pe "y/mon/\\000\\001\\002/" <file1 >file2 &&
+	tr "mon" "\000\001\002" <file1 >file2 &&

 	git commit -a -m second &&
 	git tag second &&
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -1084,13 +1084,13 @@ test_expect_success 'am works with multi-line in-body headers' '
    Body test" --author="$LONG <long@example.com>" &&
 	git format-patch --stdout -1 >patch &&
 	# bump from, date, and subject down to in-body header
-	perl -lpe "
-		if (/^From:/) {
+	awk "
+		/^From:/{
 			print \"From: x <x\@example.com>\";
 			print \"Date: Sat, 1 Jan 2000 00:00:00 +0000\";
 			print \"Subject: x\n\";
-		}
-	" patch >msg &&
+		}; 1
+	" <patch >msg &&
 	git checkout HEAD^ &&
 	git am msg &&
 	# Ensure that the author and full message are present
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -81,7 +81,7 @@ test_expect_success 'activate rerere, old style (conflicting merge)' '
 	test_might_fail git config --unset rerere.enabled &&
 	test_must_fail git merge first &&

-	sha1=$(perl -pe "s/	.*//" .git/MERGE_RR) &&
+	sha1=$(sed "s/	.*//" .git/MERGE_RR) &&
 	rr=.git/rr-cache/$sha1 &&
 	grep "^=======\$" $rr/preimage &&
 	! test -f $rr/postimage &&
@@ -94,7 +94,7 @@ test_expect_success 'rerere.enabled works, too' '
 	git reset --hard &&
 	test_must_fail git merge first &&

-	sha1=$(perl -pe "s/	.*//" .git/MERGE_RR) &&
+	sha1=$(sed "s/	.*//" .git/MERGE_RR) &&
 	rr=.git/rr-cache/$sha1 &&
 	grep ^=======$ $rr/preimage
 '
@@ -104,7 +104,7 @@ test_expect_success 'set up rr-cache' '
 	git config rerere.enabled true &&
 	git reset --hard &&
 	test_must_fail git merge first &&
-	sha1=$(perl -pe "s/	.*//" .git/MERGE_RR) &&
+	sha1=$(sed "s/	.*//" .git/MERGE_RR) &&
 	rr=.git/rr-cache/$sha1
 '

@@ -188,7 +188,7 @@ test_expect_success 'rerere updates postimage timestamp' '

 test_expect_success 'rerere clear' '
 	mv $rr/postimage .git/post-saved &&
-	echo "$sha1	a1" | perl -pe "y/\012/\000/" >.git/MERGE_RR &&
+	echo "$sha1	a1" | tr "\012" "\000" >.git/MERGE_RR &&
 	git rerere clear &&
 	! test -d $rr
 '
--- a/t/t4205-log-pretty-formats.sh
+++ b/t/t4205-log-pretty-formats.sh
@@ -698,7 +698,7 @@ test_expect_success '%(trailers:only=no,only=true) shows only "key: value" trail
 	test_cmp expect actual
 '

-test_expect_success '%(trailers:unfold) unfolds trailers' '
+test_expect_success PERL_TEST_HELPERS '%(trailers:unfold) unfolds trailers' '
 	git log --no-walk --pretty="%(trailers:unfold)" >actual &&
 	{
 		unfold <trailers &&
@@ -707,7 +707,7 @@ test_expect_success '%(trailers:unfold) unfolds trailers' '
 	test_cmp expect actual
 '

-test_expect_success ':only and :unfold work together' '
+test_expect_success PERL_TEST_HELPERS ':only and :unfold work together' '
 	git log --no-walk --pretty="%(trailers:only,unfold)" >actual &&
 	git log --no-walk --pretty="%(trailers:unfold,only)" >reverse &&
 	test_cmp actual reverse &&
@@ -754,7 +754,7 @@ test_expect_success '%(trailers:key=foo) handles multiple lines even if folded'
 	test_cmp expect actual
 '

-test_expect_success '%(trailers:key=foo,unfold) properly unfolds' '
+test_expect_success PERL_TEST_HELPERS '%(trailers:key=foo,unfold) properly unfolds' '
 	git log --no-walk --pretty="format:%(trailers:key=Signed-Off-by,unfold)" >actual &&
 	unfold <trailers | grep Signed-off-by >expect &&
 	test_cmp expect actual
--- a/t/t4216-log-bloom.sh
+++ b/t/t4216-log-bloom.sh
@@ -738,20 +738,20 @@ check_corrupt_graph () {
 	test_cmp expect.out out
 }

-test_expect_success 'Bloom reader notices too-small data chunk' '
+test_expect_success PERL_TEST_HELPERS 'Bloom reader notices too-small data chunk' '
 	check_corrupt_graph BDAT clear 00000000 &&
 	echo "warning: ignoring too-small changed-path chunk" \
 		"(4 < 12) in commit-graph file" >expect.err &&
 	test_cmp expect.err err
 '

-test_expect_success 'Bloom reader notices out-of-bounds filter offsets' '
+test_expect_success PERL_TEST_HELPERS 'Bloom reader notices out-of-bounds filter offsets' '
 	check_corrupt_graph BIDX 12 FFFFFFFF &&
 	# use grep to avoid depending on exact chunk size
 	grep "warning: ignoring out-of-range offset (4294967295) for changed-path filter at pos 3 of .git/objects/info/commit-graph" err
 '

-test_expect_success 'Bloom reader notices too-small index chunk' '
+test_expect_success PERL_TEST_HELPERS 'Bloom reader notices too-small index chunk' '
 	# replace the index with a single entry, making most
 	# lookups out-of-bounds
 	check_corrupt_graph BIDX clear 00000000 &&
@@ -760,7 +760,7 @@ test_expect_success 'Bloom reader notices too-small index chunk' '
 	test_cmp expect.err err
 '

-test_expect_success 'Bloom reader notices out-of-order index offsets' '
+test_expect_success PERL_TEST_HELPERS 'Bloom reader notices out-of-order index offsets' '
 	# we do not know any real offsets, but we can pick
 	# something plausible; we should not get to the point of
 	# actually reading from the bogus offsets anyway.
--- a/t/t5004-archive-corner-cases.sh
+++ b/t/t5004-archive-corner-cases.sh
@@ -4,6 +4,12 @@ test_description='test corner cases of git-archive'

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping archive corner cases tests; Perl not available'
+	test_done
+fi
+
 # the 10knuls.tar file is used to test for an empty git generated tar
 # without having to invoke tar because an otherwise valid empty GNU tar
 # will be considered broken by {Open,Net}BSD tar
--- a/t/t5300-pack-object.sh
+++ b/t/t5300-pack-object.sh
@@ -9,9 +9,9 @@ test_description='git pack-object'

 test_expect_success 'setup' '
 	rm -f .git/index* &&
-	perl -e "print \"a\" x 4096;" >a &&
-	perl -e "print \"b\" x 4096;" >b &&
-	perl -e "print \"c\" x 4096;" >c &&
+	test-tool genzeros 4096 | tr "\000" "a" >a &&
+	test-tool genzeros 4096 | tr "\000" "b" >b &&
+	test-tool genzeros 4096 | tr "\000" "c" >c &&
 	test-tool genrandom "seed a" 2097152 >a_big &&
 	test-tool genrandom "seed b" 2097152 >b_big &&
 	git update-index --add a a_big b b_big c &&
@@ -140,7 +140,7 @@ test_expect_success 'pack-object <stdin parsing: --stdin-packs handles garbage'
 # usage: check_deltas <stderr_from_pack_objects> <cmp_op> <nr_deltas>
 # e.g.: check_deltas stderr -gt 0
 check_deltas() {
-	deltas=$(perl -lne '/delta (\d+)/ and print $1' "$1") &&
+	deltas=$(sed -n 's/Total [0-9][0-9]* (delta \([0-9][0-9]*\)).*/\1/p' "$1") &&
 	shift &&
 	if ! test "$deltas" "$@"
 	then
@@ -215,7 +215,7 @@ test_expect_success 'unpack with OFS_DELTA (core.fsyncmethod=batch)' '
 	check_unpack test-3-${packname_3} obj-list "$BATCH_CONFIGURATION"
 '

-test_expect_success 'compare delta flavors' '
+test_expect_success PERL_TEST_HELPERS 'compare delta flavors' '
 	perl -e '\''
 		defined($_ = -s $_) or die for @ARGV;
 		exit 1 if $ARGV[0] <= $ARGV[1];
--- a/t/t5303-pack-corruption-resilience.sh
+++ b/t/t5303-pack-corruption-resilience.sh
@@ -103,7 +103,8 @@ test_expect_success 'create corruption in data of first object' '
 	create_new_pack &&
 	git prune-packed &&
 	chmod +w ${pack}.pack &&
-	perl -i.bak -pe "s/ base /abcdef/" ${pack}.pack &&
+	sed "s/ base /abcdef/" ${pack}.pack >${pack}.pack.munged &&
+	mv ${pack}.pack.munged ${pack}.pack &&
 	test_must_fail git cat-file blob $blob_1 > /dev/null &&
 	test_must_fail git cat-file blob $blob_2 > /dev/null &&
 	test_must_fail git cat-file blob $blob_3 > /dev/null
@@ -160,7 +161,8 @@ test_expect_success 'create corruption in data of first delta' '
 	create_new_pack &&
 	git prune-packed &&
 	chmod +w ${pack}.pack &&
-	perl -i.bak -pe "s/ delta1 /abcdefgh/" ${pack}.pack &&
+	sed "s/ delta1 /abcdefgh/" ${pack}.pack >${pack}.pack.munged &&
+	mv ${pack}.pack.munged ${pack}.pack &&
 	git cat-file blob $blob_1 > /dev/null &&
 	test_must_fail git cat-file blob $blob_2 > /dev/null &&
 	test_must_fail git cat-file blob $blob_3 > /dev/null
--- a/t/t5310-pack-bitmaps.sh
+++ b/t/t5310-pack-bitmaps.sh
@@ -421,7 +421,7 @@ test_bitmap_cases () {

 			# mark the commits which did not receive bitmaps as preferred,
 			# and generate the bitmap again
-			perl -pe "s{^}{create refs/tags/include/$. }" <before |
+			sed "s|\(.*\)|create refs/tags/include/\1 \1|" before |
 				git update-ref --stdin &&
 			git -c pack.preferBitmapTips=refs/tags/include repack -adb &&

--- a/t/t5316-pack-delta-depth.sh
+++ b/t/t5316-pack-delta-depth.sh
@@ -76,11 +76,11 @@ test_expect_success 'create series of packs' '

 max_chain() {
 	git index-pack --verify-stat-only "$1" >output &&
-	perl -lne '
-	  BEGIN { $len = 0 }
-	  /chain length = (\d+)/ and $len = $1;
-	  END { print $len }
-	' output
+	awk '
+		BEGIN { len=0 }
+		/chain length = [0-9]+:/{ len=$4 }
+		END { print len }
+	' <output | tr -d ':'
 }

 # Note that this whole setup is pretty reliant on the current
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -837,7 +837,7 @@ check_corrupt_chunk () {
 	test_cmp expect.out out
 }

-test_expect_success 'reader notices too-small oid fanout chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small oid fanout chunk' '
 	# make it big enough that the graph file is plausible,
 	# otherwise we hit an earlier check
 	check_corrupt_chunk OIDF clear $(printf "000000%02x" $(test_seq 250)) &&
@@ -848,7 +848,7 @@ test_expect_success 'reader notices too-small oid fanout chunk' '
 	test_cmp expect.err err
 '

-test_expect_success 'reader notices fanout/lookup table mismatch' '
+test_expect_success PERL_TEST_HELPERS 'reader notices fanout/lookup table mismatch' '
 	check_corrupt_chunk OIDF 1020 "FFFFFFFF" &&
 	cat >expect.err <<-\EOF &&
 	error: commit-graph OID lookup chunk is the wrong size
@@ -857,7 +857,7 @@ test_expect_success 'reader notices fanout/lookup table mismatch' '
 	test_cmp expect.err err
 '

-test_expect_success 'reader notices out-of-bounds fanout' '
+test_expect_success PERL_TEST_HELPERS 'reader notices out-of-bounds fanout' '
 	# Rather than try to corrupt a specific hash, we will just
 	# wreck them all. But we cannot just set them all to 0xFFFFFFFF or
 	# similar, as they are used for hi/lo starts in a binary search (so if
@@ -873,7 +873,7 @@ test_expect_success 'reader notices out-of-bounds fanout' '
 	test_cmp expect.err err
 '

-test_expect_success 'reader notices too-small commit data chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small commit data chunk' '
 	check_corrupt_chunk CDAT clear 00000000 &&
 	cat >expect.err <<-\EOF &&
 	error: commit-graph commit data chunk is wrong size
@@ -882,7 +882,7 @@ test_expect_success 'reader notices too-small commit data chunk' '
 	test_cmp expect.err err
 '

-test_expect_success 'reader notices out-of-bounds extra edge' '
+test_expect_success PERL_TEST_HELPERS 'reader notices out-of-bounds extra edge' '
 	check_corrupt_chunk EDGE clear &&
 	cat >expect.err <<-\EOF &&
 	error: commit-graph extra-edges pointer out of bounds
@@ -890,7 +890,7 @@ test_expect_success 'reader notices out-of-bounds extra edge' '
 	test_cmp expect.err err
 '

-test_expect_success 'reader notices too-small generations chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small generations chunk' '
 	check_corrupt_chunk GDA2 clear 00000000 &&
 	cat >expect.err <<-\EOF &&
 	error: commit-graph generations chunk is wrong size
--- a/t/t5319-multi-pack-index.sh
+++ b/t/t5319-multi-pack-index.sh
@@ -1120,7 +1120,7 @@ corrupt_chunk () {
 	corrupt_chunk_file $midx "$@"
 }

-test_expect_success 'reader notices too-small oid fanout chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small oid fanout chunk' '
 	corrupt_chunk OIDF clear 00000000 &&
 	test_must_fail git log 2>err &&
 	cat >expect <<-\EOF &&
@@ -1130,7 +1130,7 @@ test_expect_success 'reader notices too-small oid fanout chunk' '
 	test_cmp expect err
 '

-test_expect_success 'reader notices too-small oid lookup chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small oid lookup chunk' '
 	corrupt_chunk OIDL clear 00000000 &&
 	test_must_fail git log 2>err &&
 	cat >expect <<-\EOF &&
@@ -1140,7 +1140,7 @@ test_expect_success 'reader notices too-small oid lookup chunk' '
 	test_cmp expect err
 '

-test_expect_success 'reader notices too-small pack names chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small pack names chunk' '
 	# There is no NUL to terminate the name here, so the
 	# chunk is too short.
 	corrupt_chunk PNAM clear 70656666 &&
@@ -1151,7 +1151,7 @@ test_expect_success 'reader notices too-small pack names chunk' '
 	test_cmp expect err
 '

-test_expect_success 'reader handles unaligned chunks' '
+test_expect_success PERL_TEST_HELPERS 'reader handles unaligned chunks' '
 	# A 9-byte PNAM means all of the subsequent chunks
 	# will no longer be 4-byte aligned, but it is still
 	# a valid one-pack chunk on its own (it is "foo.pack\0").
@@ -1165,7 +1165,7 @@ test_expect_success 'reader handles unaligned chunks' '
 	test_cmp expect.err err
 '

-test_expect_success 'reader notices too-small object offset chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small object offset chunk' '
 	corrupt_chunk OOFF clear 00000000 &&
 	test_must_fail git log 2>err &&
 	cat >expect <<-\EOF &&
@@ -1175,7 +1175,7 @@ test_expect_success 'reader notices too-small object offset chunk' '
 	test_cmp expect err
 '

-test_expect_success 'reader bounds-checks large offset table' '
+test_expect_success PERL_TEST_HELPERS 'reader bounds-checks large offset table' '
 	# re-use the objects64 dir here to cheaply get access to a midx
 	# with large offsets.
 	git init repo &&
@@ -1197,7 +1197,7 @@ test_expect_success 'reader bounds-checks large offset table' '
 	)
 '

-test_expect_success 'reader notices too-small revindex chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader notices too-small revindex chunk' '
 	# We only get a revindex with bitmaps (and likewise only
 	# load it when they are asked for).
 	test_config repack.writeBitmaps true &&
@@ -1214,7 +1214,7 @@ test_expect_success 'reader notices too-small revindex chunk' '
 	test_cmp expect.err err
 '

-test_expect_success 'reader notices out-of-bounds fanout' '
+test_expect_success PERL_TEST_HELPERS 'reader notices out-of-bounds fanout' '
 	# This is similar to the out-of-bounds fanout test in t5318. The values
 	# in adjacent entries should be large but not identical (they
 	# are used as hi/lo starts for a binary search, which would then abort
--- a/t/t5324-split-commit-graph.sh
+++ b/t/t5324-split-commit-graph.sh
@@ -401,7 +401,7 @@ test_expect_success 'verify across alternates' '
 	)
 '

-test_expect_success 'reader bounds-checks base-graph chunk' '
+test_expect_success PERL_TEST_HELPERS 'reader bounds-checks base-graph chunk' '
 	git clone --no-hardlinks . corrupt-base-chunk &&
 	(
 		cd corrupt-base-chunk &&
--- a/t/t5326-multi-pack-bitmaps.sh
+++ b/t/t5326-multi-pack-bitmaps.sh
@@ -176,8 +176,8 @@ test_midx_bitmap_cases () {
 			comm -13 bitmaps commits >before &&
 			test_line_count = 1 before &&

-			perl -ne "printf(\"create refs/tags/include/%d \", $.); print" \
-				<before | git update-ref --stdin &&
+			sed "s|\(.*\)|create refs/tags/include/\1 \1|" before |
+			git update-ref --stdin &&

 			rm -fr $midx-$(midx_checksum $objdir).bitmap &&
 			rm -fr $midx &&
--- a/t/t5328-commit-graph-64bit-time.sh
+++ b/t/t5328-commit-graph-64bit-time.sh
@@ -74,7 +74,7 @@ test_expect_success 'single commit with generation data exceeding UINT32_MAX' '
 	git -C repo-uint32-max commit-graph verify
 '

-test_expect_success 'reader notices out-of-bounds generation overflow' '
+test_expect_success PERL_TEST_HELPERS 'reader notices out-of-bounds generation overflow' '
 	graph=.git/objects/info/commit-graph &&
 	test_when_finished "rm -rf $graph" &&
 	git commit-graph write --reachable &&
--- a/t/t5333-pseudo-merge-bitmaps.sh
+++ b/t/t5333-pseudo-merge-bitmaps.sh
@@ -28,9 +28,8 @@ test_pseudo_merges_reused () {

 tag_everything () {
 	git rev-list --all --no-object-names >in &&
-	perl -lne '
-		print "create refs/tags/" . $. . " " . $1 if /([0-9a-f]+)/
-	' <in | git update-ref --stdin
+	sed 's|\(.*\)|create refs/tags/\1 \1|' in |
+	git update-ref --stdin
 }

 test_expect_success 'setup' '
@@ -102,7 +101,7 @@ test_expect_success 'stale bitmap traversal with pseudo-merges' '
 	test_cmp expect actual
 '

-test_expect_success 'bitmapPseudoMerge.sampleRate adjusts commit selection rate' '
+test_expect_success PERL_TEST_HELPERS 'bitmapPseudoMerge.sampleRate adjusts commit selection rate' '
 	test_config bitmapPseudoMerge.test.pattern "refs/tags/" &&
 	test_config bitmapPseudoMerge.test.maxMerges 1 &&
 	test_config bitmapPseudoMerge.test.stableThreshold never &&
@@ -235,8 +234,7 @@ test_expect_success 'pseudo-merge pattern with capture groups' '
 			test_commit_bulk 16 &&

 			git rev-list HEAD~16.. >in &&
-
-			perl -lne "print \"create refs/remotes/$r/tags/\$. \$_\"" <in |
+			sed "s|\(.*\)|create refs/remotes/$r/tags/\1 \1" in |
 			git update-ref --stdin || return 1
 		done &&

@@ -252,7 +250,7 @@ test_expect_success 'pseudo-merge pattern with capture groups' '
 		do
 			test_pseudo_merge_commits $m >oids &&
 			grep -f oids refs |
-			perl -lne "print \$1 if /refs\/remotes\/([0-9]+)/" |
+			sed -n "s|refs/remotes/\([0-9][0-9]*\)/|\1|p" &&
 			sort -u || return 1
 		done >remotes &&

--- a/t/t5400-send-pack.sh
+++ b/t/t5400-send-pack.sh
@@ -275,7 +275,7 @@ extract_ref_advertisement () {
 	'
 }

-test_expect_success 'receive-pack de-dupes .have lines' '
+test_expect_success PERL_TEST_HELPERS 'receive-pack de-dupes .have lines' '
 	git init shared &&
 	git -C shared commit --allow-empty -m both &&
 	git clone -s shared fork &&
--- a/t/t5410-receive-pack-alternates.sh
+++ b/t/t5410-receive-pack-alternates.sh
@@ -17,7 +17,7 @@ test_expect_success 'setup' '
 '

 extract_haves () {
-	depacketize | perl -lne '/^(\S+) \.have/ and print $1'
+	depacketize | sed -n 's/^\([^ ][^ ]*\) \.have/\1/p'
 }

 test_expect_success 'with core.alternateRefsCommand' '
--- a/t/t5503-tagfollow.sh
+++ b/t/t5503-tagfollow.sh
@@ -7,6 +7,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping tagfollow tests; Perl not available'
+	test_done
+fi
+
 # End state of the repository:
 #
 #         T - tag1          S - tag2
--- a/t/t5504-fetch-receive-strict.sh
+++ b/t/t5504-fetch-receive-strict.sh
@@ -359,7 +359,7 @@ test_expect_success \
 	grep "Cannot demote unterminatedheader" act
 '

-test_expect_success 'badFilemode is not a strict error' '
+test_expect_success PERL_TEST_HELPERS 'badFilemode is not a strict error' '
 	git init --bare badmode.git &&
 	tree=$(
 		cd badmode.git &&
--- a/t/t5510-fetch.sh
+++ b/t/t5510-fetch.sh
@@ -8,6 +8,12 @@ test_description='Per branch config variables affects "git fetch".
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-bundle.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping fetch tests; Perl not available'
+	test_done
+fi
+
 D=$(pwd)

 test_expect_success setup '
--- a/t/t5532-fetch-proxy.sh
+++ b/t/t5532-fetch-proxy.sh
@@ -4,6 +4,12 @@ test_description='fetching via git:// using core.gitproxy'

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping fetch proxy tests; Perl not available'
+	test_done
+fi
+
 test_expect_success 'setup remote repo' '
 	git init remote &&
 	(cd remote &&
--- a/t/t5534-push-signed.sh
+++ b/t/t5534-push-signed.sh
@@ -205,7 +205,7 @@ test_expect_success GPG 'inconsistent push options in signed push not allowed' '
 	# Tweak the push output to make the push option outside the cert
 	# different, then replay it on a fresh dst, checking that ff is not
 	# deleted.
-	perl -pe "s/([^ ])bar/\$1baz/" push >push.tweak &&
+	sed "s/\([^ ]\)bar/\1baz/" push >push.tweak &&
 	prepare_dst &&
 	git -C dst config receive.certnonceseed sekrit &&
 	git -C dst config receive.advertisepushoptions 1 &&
--- a/t/t5537-fetch-shallow.sh
+++ b/t/t5537-fetch-shallow.sh
@@ -271,22 +271,21 @@ test_expect_success 'shallow fetches check connectivity before writing shallow f
 	git -C "$REPO" config protocol.version 2 &&
 	git -C client config protocol.version 2 &&

-	git -C client fetch --depth=2 "$HTTPD_URL/one_time_perl/repo" main:a_branch &&
+	git -C client fetch --depth=2 "$HTTPD_URL/one_time_script/repo" main:a_branch &&

 	# Craft a situation in which the server sends back an unshallow request
 	# with an empty packfile. This is done by refetching with a shorter
 	# depth (to ensure that the packfile is empty), and overwriting the
 	# shallow line in the response with the unshallow line we want.
-	printf "$(test_oid perl)" \
-	       "$(git -C "$REPO" rev-parse HEAD)" \
-	       "$(git -C "$REPO" rev-parse HEAD^)" \
-	       >"$HTTPD_ROOT_PATH/one-time-perl" &&
+	write_script "$HTTPD_ROOT_PATH/one-time-script" <<-EOF &&
+	sed "$(printf "$(test_oid perl)" "$(git -C "$REPO" rev-parse HEAD)" "$(git -C "$REPO" rev-parse HEAD^)")" "\$1"
+	EOF
 	test_must_fail env GIT_TEST_SIDEBAND_ALL=0 git -C client \
-		fetch --depth=1 "$HTTPD_URL/one_time_perl/repo" \
+		fetch --depth=1 "$HTTPD_URL/one_time_script/repo" \
 		main:a_branch &&

-	# Ensure that the one-time-perl script was used.
-	! test -e "$HTTPD_ROOT_PATH/one-time-perl" &&
+	# Ensure that the one-time-script script was used.
+	! test -e "$HTTPD_ROOT_PATH/one-time-script" &&

 	# Ensure that the resulting repo is consistent, despite our failure to
 	# fetch.
--- a/t/t5551-http-fetch-smart.sh
+++ b/t/t5551-http-fetch-smart.sh
@@ -7,6 +7,13 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-httpd.sh
+
+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping http fetch smart tests; Perl not available'
+	test_done
+fi
+
 test "$HTTP_PROTO" = "HTTP/2" && enable_http2
 start_httpd

--- a/t/t5562-http-backend-content-length.sh
+++ b/t/t5562-http-backend-content-length.sh
@@ -4,6 +4,12 @@ test_description='test git-http-backend respects CONTENT_LENGTH'

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping http backend content tests; Perl not available'
+	test_done
+fi
+
 test_lazy_prereq GZIP 'gzip --version'

 verify_http_result() {
--- a/t/t5601-clone.sh
+++ b/t/t5601-clone.sh
@@ -649,7 +649,7 @@ test_expect_success 'GIT_TRACE_PACKFILE produces a usable pack' '
 	git -C replay.git index-pack -v --stdin <tmp.pack
 '

-test_expect_success 'clone on case-insensitive fs' '
+test_expect_success PERL_TEST_HELPERS 'clone on case-insensitive fs' '
 	git init icasefs &&
 	(
 		cd icasefs &&
@@ -662,7 +662,7 @@ test_expect_success 'clone on case-insensitive fs' '
 	)
 '

-test_expect_success CASE_INSENSITIVE_FS 'colliding file detection' '
+test_expect_success PERL_TEST_HELPERS,CASE_INSENSITIVE_FS 'colliding file detection' '
 	grep X icasefs/warning &&
 	grep x icasefs/warning &&
 	test_grep "the following paths have collided" icasefs/warning
--- a/t/t5616-partial-clone.sh
+++ b/t/t5616-partial-clone.sh
@@ -737,18 +737,22 @@ intersperse () {
 	sed 's/\(..\)/'$1'\1/g'
 }

-# Create a one-time-perl command to replace the existing packfile with $1.
+# Create a one-time-script command to replace the existing packfile with $1.
 replace_packfile () {
-	# The protocol requires that the packfile be sent in sideband 1, hence
-	# the extra \x01 byte at the beginning.
-	cp $1 "$HTTPD_ROOT_PATH/one-time-pack" &&
-	echo 'if (/packfile/) {
-		print;
-		my $length = -s "one-time-pack";
-		printf "%04x\x01", $length + 5;
-		print `cat one-time-pack` . "0000";
-		last
-	}' >"$HTTPD_ROOT_PATH/one-time-perl"
+	cp "$1" one-time-pack &&
+	write_script "$HTTPD_ROOT_PATH/one-time-script" <<-EOF
+	if grep packfile "\$1" >/dev/null
+	then
+		sed '/packfile/q' "\$1" &&
+		# The protocol requires that the packfile be sent in sideband
+		# 1, hence the extra \001 byte at the beginning.
+		printf "%04x\001" \$((\$(wc -c <"$PWD/one-time-pack") + 5)) &&
+		cat "$PWD/one-time-pack" &&
+		printf "0000"
+	else
+		cat "\$1"
+	fi
+	EOF
 }

 test_expect_success 'upon cloning, check that all refs point to objects' '
@@ -776,12 +780,12 @@ test_expect_success 'upon cloning, check that all refs point to objects' '
 	# section header.
 	test_config -C "$SERVER" protocol.version 2 &&
 	test_must_fail git -c protocol.version=2 clone \
-		--filter=blob:none $HTTPD_URL/one_time_perl/server repo 2>err &&
+		--filter=blob:none $HTTPD_URL/one_time_script/server repo 2>err &&

 	test_grep "did not send all necessary objects" err &&

-	# Ensure that the one-time-perl script was used.
-	! test -e "$HTTPD_ROOT_PATH/one-time-perl"
+	# Ensure that the one-time-script script was used.
+	! test -e "$HTTPD_ROOT_PATH/one-time-script"
 '

 test_expect_success 'when partial cloning, tolerate server not sending target of tag' '
@@ -818,14 +822,14 @@ test_expect_success 'when partial cloning, tolerate server not sending target of

 	# Exercise to make sure it works.
 	git -c protocol.version=2 clone \
-		--filter=blob:none $HTTPD_URL/one_time_perl/server repo 2> err &&
+		--filter=blob:none $HTTPD_URL/one_time_script/server repo 2> err &&
 	! grep "missing object referenced by" err &&

-	# Ensure that the one-time-perl script was used.
-	! test -e "$HTTPD_ROOT_PATH/one-time-perl"
+	# Ensure that the one-time-script script was used.
+	! test -e "$HTTPD_ROOT_PATH/one-time-script"
 '

-test_expect_success 'tolerate server sending REF_DELTA against missing promisor objects' '
+test_expect_success PERL_TEST_HELPERS 'tolerate server sending REF_DELTA against missing promisor objects' '
 	SERVER="$HTTPD_DOCUMENT_ROOT_PATH/server" &&
 	rm -rf "$SERVER" repo &&
 	test_create_repo "$SERVER" &&
@@ -845,7 +849,7 @@ test_expect_success 'tolerate server sending REF_DELTA against missing promisor

 	# Clone. The client has deltabase_have but not deltabase_missing.
 	git -c protocol.version=2 clone --no-checkout \
-		--filter=blob:none $HTTPD_URL/one_time_perl/server repo &&
+		--filter=blob:none $HTTPD_URL/one_time_script/server repo &&
 	git -C repo hash-object -w -- "$SERVER/have.txt" &&

 	# Sanity check to ensure that the client does not have
@@ -899,8 +903,8 @@ test_expect_success 'tolerate server sending REF_DELTA against missing promisor
 	grep "want $(cat deltabase_missing)" trace &&
 	! grep "want $(cat deltabase_have)" trace &&

-	# Ensure that the one-time-perl script was used.
-	! test -e "$HTTPD_ROOT_PATH/one-time-perl"
+	# Ensure that the one-time-script script was used.
+	! test -e "$HTTPD_ROOT_PATH/one-time-script"
 '

 # DO NOT add non-httpd-specific tests here, because the last part of this
--- a/t/t5701-git-serve.sh
+++ b/t/t5701-git-serve.sh
@@ -228,7 +228,10 @@ test_expect_success 'ignore very large set of prefixes' '
 		echo command=ls-refs &&
 		echo object-format=$(test_oid algo) &&
 		echo 0001 &&
-		perl -le "print \"ref-prefix refs/heads/\$_\" for (1..65536)" &&
+		awk "{
+			for (i = 1; i <= 65536; i++)
+				print \"ref-prefix refs/heads/\", \$i
+		}" &&
 		echo 0000
 	} |
 	test-tool pkt-line pack >in &&
--- a/t/t5702-protocol-v2.sh
+++ b/t/t5702-protocol-v2.sh
@@ -1174,11 +1174,12 @@ test_expect_success 'when server sends "ready", expect DELIM' '

 	# After "ready" in the acknowledgments section, pretend that a FLUSH
 	# (0000) was sent instead of a DELIM (0001).
-	printf "\$ready = 1 if /ready/; \$ready && s/0001/0000/" \
-		>"$HTTPD_ROOT_PATH/one-time-perl" &&
+	write_script "$HTTPD_ROOT_PATH/one-time-script" <<-\EOF &&
+	sed "/ready/{n;s/0001/0000/;}" "$1"
+	EOF

 	test_must_fail git -C http_child -c protocol.version=2 \
-		fetch "$HTTPD_URL/one_time_perl/http_parent" 2> err &&
+		fetch "$HTTPD_URL/one_time_script/http_parent" 2> err &&
 	test_grep "expected packfile to be sent after .ready." err
 '

@@ -1199,12 +1200,13 @@ test_expect_success 'when server does not send "ready", expect FLUSH' '

 	# After the acknowledgments section, pretend that a DELIM
 	# (0001) was sent instead of a FLUSH (0000).
-	printf "\$ack = 1 if /acknowledgments/; \$ack && s/0000/0001/" \
-		>"$HTTPD_ROOT_PATH/one-time-perl" &&
+	write_script "$HTTPD_ROOT_PATH/one-time-script" <<-\EOF &&
+	sed "/acknowledgments/,//{s/0000/0001/;}" "$1"
+	EOF

 	test_must_fail env GIT_TRACE_PACKET="$(pwd)/log" git -C http_child \
 		-c protocol.version=2 \
-		fetch "$HTTPD_URL/one_time_perl/http_parent" 2> err &&
+		fetch "$HTTPD_URL/one_time_script/http_parent" 2> err &&
 	grep "fetch< .*acknowledgments" log &&
 	! grep "fetch< .*ready" log &&
 	test_grep "expected no other sections to be sent after no .ready." err
@@ -1490,12 +1492,13 @@ test_expect_success 'http:// --negotiate-only' '

 test_expect_success 'http:// --negotiate-only without wait-for-done support' '
 	SERVER="server" &&
-	URI="$HTTPD_URL/one_time_perl/server" &&
+	URI="$HTTPD_URL/one_time_script/server" &&

 	setup_negotiate_only "$SERVER" "$URI" &&

-	echo "s/ wait-for-done/ xxxx-xxx-xxxx/" \
-		>"$HTTPD_ROOT_PATH/one-time-perl" &&
+	write_script "$HTTPD_ROOT_PATH/one-time-script" <<-\EOF &&
+	sed "s/ wait-for-done/ xxxx-xxx-xxxx/" "$1"
+	EOF

 	test_must_fail git -c protocol.version=2 -C client fetch \
 		--no-tags \
--- a/t/t5703-upload-pack-ref-in-want.sh
+++ b/t/t5703-upload-pack-ref-in-want.sh
@@ -83,18 +83,15 @@ test_expect_success 'setup repository' '

 test_expect_success 'config controls ref-in-want advertisement' '
 	test-tool serve-v2 --advertise-capabilities >out &&
-	perl -ne "/ref-in-want/ and print" out >out.filter &&
-	test_must_be_empty out.filter &&
+	test_grep ! "ref-in-want" out &&

 	git config uploadpack.allowRefInWant false &&
 	test-tool serve-v2 --advertise-capabilities >out &&
-	perl -ne "/ref-in-want/ and print" out >out.filter &&
-	test_must_be_empty out.filter &&
+	test_grep ! "ref-in-want" out &&

 	git config uploadpack.allowRefInWant true &&
 	test-tool serve-v2 --advertise-capabilities >out &&
-	perl -ne "/ref-in-want/ and print" out >out.filter &&
-	test_file_not_empty out.filter
+	test_grep "ref-in-want" out
 '

 test_expect_success 'invalid want-ref line' '
@@ -462,7 +459,7 @@ test_expect_success 'setup repos for change-while-negotiating test' '
 		test_commit m3 &&
 		git tag -d m2 m3
 	) &&
-	git -C "$LOCAL_PRISTINE" remote set-url origin "http://127.0.0.1:$LIB_HTTPD_PORT/one_time_perl/repo" &&
+	git -C "$LOCAL_PRISTINE" remote set-url origin "http://127.0.0.1:$LIB_HTTPD_PORT/one_time_script/repo" &&
 	git -C "$LOCAL_PRISTINE" config protocol.version 2
 '

@@ -475,10 +472,12 @@ inconsistency () {
 	# RPCs during a single negotiation.
 	oid1=$(git -C "$REPO" rev-parse $1) &&
 	oid2=$(git -C "$REPO" rev-parse $2) &&
-	echo "s/$oid1/$oid2/" >"$HTTPD_ROOT_PATH/one-time-perl"
+	write_script "$HTTPD_ROOT_PATH/one-time-script" <<-EOF
+	sed "s/$oid1/$oid2/" "\$1"
+	EOF
 }

-test_expect_success 'server is initially ahead - no ref in want' '
+test_expect_success PERL_TEST_HELPERS 'server is initially ahead - no ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant false &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
@@ -487,7 +486,7 @@ test_expect_success 'server is initially ahead - no ref in want' '
 	test_grep "fatal: remote error: upload-pack: not our ref" err
 '

-test_expect_success 'server is initially ahead - ref in want' '
+test_expect_success PERL_TEST_HELPERS 'server is initially ahead - ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant true &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
@@ -499,7 +498,7 @@ test_expect_success 'server is initially ahead - ref in want' '
 	test_cmp expected actual
 '

-test_expect_success 'server is initially behind - no ref in want' '
+test_expect_success PERL_TEST_HELPERS 'server is initially behind - no ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant false &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
@@ -511,7 +510,7 @@ test_expect_success 'server is initially behind - no ref in want' '
 	test_cmp expected actual
 '

-test_expect_success 'server is initially behind - ref in want' '
+test_expect_success PERL_TEST_HELPERS 'server is initially behind - ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant true &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
@@ -523,11 +522,13 @@ test_expect_success 'server is initially behind - ref in want' '
 	test_cmp expected actual
 '

-test_expect_success 'server loses a ref - ref in want' '
+test_expect_success PERL_TEST_HELPERS 'server loses a ref - ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant true &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
-	echo "s/main/rain/" >"$HTTPD_ROOT_PATH/one-time-perl" &&
+	write_script "$HTTPD_ROOT_PATH/one-time-script" <<-\EOF &&
+	sed "s/main/rain/" "$1"
+	EOF
 	test_must_fail git -C local fetch 2>err &&

 	test_grep "fatal: remote error: unknown ref refs/heads/rain" err
--- a/t/t5710-promisor-remote-capability.sh
+++ b/t/t5710-promisor-remote-capability.sh
@@ -4,6 +4,12 @@ test_description='handling of promisor remote advertisement'

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping promisor remote capabilities tests; Perl not available'
+	test_done
+fi
+
 GIT_TEST_MULTI_PACK_INDEX=0
 GIT_TEST_MULTI_PACK_INDEX_WRITE_INCREMENTAL=0

--- a/t/t6011-rev-list-with-bad-commit.sh
+++ b/t/t6011-rev-list-with-bad-commit.sh
@@ -35,11 +35,15 @@ test_expect_success 'verify number of revisions' \
   first_commit=$(git rev-parse HEAD~3)
   '

-test_expect_success 'corrupt second commit object' \
-   '
-   perl -i.bak -pe "s/second commit/socond commit/" .git/objects/pack/*.pack &&
-   test_must_fail git fsck --full
-   '
+test_expect_success 'corrupt second commit object' '
+	for p in .git/objects/pack/*.pack
+	do
+		sed "s/second commit/socond commit/" "$p" >"$p.munged" &&
+		mv "$p.munged" "$p" ||
+		return 1
+	done &&
+	test_must_fail git fsck --full
+'

 test_expect_success 'rev-list should fail' '
 	test_must_fail env GIT_TEST_COMMIT_GRAPH=0 git -c core.commitGraph=false rev-list --all > /dev/null
--- a/t/t6013-rev-list-reverse-parents.sh
+++ b/t/t6013-rev-list-reverse-parents.sh
@@ -26,17 +26,19 @@ test_expect_success 'set up --reverse example' '
 	commit five
 	'

+reverse () {
+	awk '{a[i++]=$0} END {for (j=i-1; j>=0;) print a[j--] }'
+}
+
 test_expect_success '--reverse --parents --full-history combines correctly' '
-	git rev-list --parents --full-history main -- foo |
-		perl -e "print reverse <>" > expected &&
+	git rev-list --parents --full-history main -- foo | reverse >expected &&
 	git rev-list --reverse --parents --full-history main -- foo \
 		> actual &&
 	test_cmp expected actual
 	'

 test_expect_success '--boundary does too' '
-	git rev-list --boundary --parents --full-history main ^root -- foo |
-		perl -e "print reverse <>" > expected &&
+	git rev-list --boundary --parents --full-history main ^root -- foo | reverse >expected &&
 	git rev-list --boundary --reverse --parents --full-history \
 		main ^root -- foo > actual &&
 	test_cmp expected actual
--- a/t/t6102-rev-list-unexpected-objects.sh
+++ b/t/t6102-rev-list-unexpected-objects.sh
@@ -4,6 +4,12 @@ test_description='git rev-list should handle unexpected object types'

 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping rev-list unexpected objects tests; Perl not available'
+	test_done
+fi
+
 test_expect_success 'setup well-formed objects' '
 	blob="$(printf "foo" | git hash-object -w --stdin)" &&
 	tree="$(printf "100644 blob $blob\tfoo" | git mktree)" &&
--- a/t/t6115-rev-list-du.sh
+++ b/t/t6115-rev-list-du.sh
@@ -22,7 +22,7 @@ test_expect_success 'set up repository' '
 disk_usage_slow () {
 	git rev-list --no-object-names "$@" |
 	git cat-file --batch-check="%(objectsize:disk)" |
-	perl -lne '$total += $_; END { print $total}'
+	awk '{ i += $1 } END { print i }'
 }

 # check behavior with given rev-list options; note that
--- a/t/t6300-for-each-ref.sh
+++ b/t/t6300-for-each-ref.sh
@@ -1216,7 +1216,7 @@ test_expect_success '%(raw) with --tcl must fail' '
 	test_must_fail git for-each-ref --format="%(raw)" --tcl
 '

-test_expect_success '%(raw) with --perl' '
+test_expect_success PERL_TEST_HELPERS '%(raw) with --perl' '
 	git for-each-ref --format="\$name= %(raw);
 print \"\$name\"" refs/myblobs/blob1 --perl | perl >actual &&
 	cmp blob1 actual &&
@@ -1443,9 +1443,14 @@ test_expect_success 'set up trailers for next test' '
 '

 test_trailer_option () {
+	if test "$#" -eq 3
+	then
+		prereq="$1"
+		shift
+	fi &&
 	title=$1 option=$2
 	cat >expect
-	test_expect_success "$title" '
+	test_expect_success $prereq "$title" '
 		git for-each-ref --format="%($option)" refs/heads/main >actual &&
 		test_cmp expect actual &&
 		git for-each-ref --format="%(contents:$option)" refs/heads/main >actual &&
@@ -1453,7 +1458,7 @@ test_trailer_option () {
 	'
 }

-test_trailer_option '%(trailers:unfold) unfolds trailers' \
+test_trailer_option PERL_TEST_HELPERS '%(trailers:unfold) unfolds trailers' \
 	'trailers:unfold' <<-EOF
 	$(unfold <trailers)

@@ -1483,13 +1488,13 @@ test_trailer_option '%(trailers:only=no) shows all trailers' \

 	EOF

-test_trailer_option '%(trailers:only) and %(trailers:unfold) work together' \
+test_trailer_option PERL_TEST_HELPERS '%(trailers:only) and %(trailers:unfold) work together' \
 	'trailers:only,unfold' <<-EOF
 	$(grep -v patch.description <trailers | unfold)

 	EOF

-test_trailer_option '%(trailers:unfold) and %(trailers:only) work together' \
+test_trailer_option PERL_TEST_HELPERS '%(trailers:unfold) and %(trailers:only) work together' \
 	'trailers:unfold,only' <<-EOF
 	$(grep -v patch.description <trailers | unfold)

--- a/t/t7006-pager.sh
+++ b/t/t7006-pager.sh
@@ -662,9 +662,9 @@ test_expect_success 'setup trace2' '
 '

 test_expect_success 'setup large log output' '
-	perl -e "
-		print \"this is a long commit message\" x 50000
-	" >commit-msg &&
+	test-tool genzeros 50000 |
+	tr "\000" "a" |
+	sed "s/a/this is a long commit message/g" >commit-msg &&
 	git commit --allow-empty -F commit-msg
 '

--- a/t/t7416-submodule-dash-url.sh
+++ b/t/t7416-submodule-dash-url.sh
@@ -33,7 +33,8 @@ test_expect_success 'fsck accepts protected dash' '
 '

 test_expect_success 'remove ./ protection from .gitmodules url' '
-	perl -i -pe "s{\./}{}" .gitmodules &&
+	sed "s|\./||" .gitmodules >.gitmodules.munged &&
+	mv .gitmodules.munged .gitmodules &&
 	git commit -am "drop protection"
 '

--- a/t/t7501-commit-basic-functionality.sh
+++ b/t/t7501-commit-basic-functionality.sh
@@ -46,7 +46,7 @@ test_expect_success 'paths and -a do not mix' '
 	test_must_fail git commit -m foo -a file
 '

-test_expect_success PERL 'can use paths with --interactive' '
+test_expect_success 'can use paths with --interactive' '
 	echo bong-o-bong >file &&
 	# 2: update, 1:st path, that is all, 7: quit
 	test_write_lines 2 1 "" 7 |
@@ -345,12 +345,12 @@ test_expect_success 'overriding author from command line' '
 	grep Rubber.Duck output
 '

-test_expect_success PERL 'interactive add' '
+test_expect_success 'interactive add' '
 	echo 7 | test_must_fail git commit --interactive >out &&
 	grep "What now" out
 '

-test_expect_success PERL "commit --interactive doesn't change index if editor aborts" '
+test_expect_success "commit --interactive doesn't change index if editor aborts" '
 	echo zoo >file &&
 	test_must_fail git diff --exit-code >diff1 &&
 	test_write_lines u "*" q |
--- a/t/t7508-status.sh
+++ b/t/t7508-status.sh
@@ -1066,7 +1066,7 @@ test_expect_success 'status -s submodule summary (clean submodule)' '

 test_expect_success 'status -z implies porcelain' '
 	git status --porcelain |
-	perl -pe "s/\012/\000/g" >expect &&
+	tr "\012" "\000" >expect &&
 	git status -z >output &&
 	test_cmp expect output
 '
--- a/t/t7815-grep-binary.sh
+++ b/t/t7815-grep-binary.sh
@@ -114,13 +114,10 @@ test_expect_success 'grep respects not-binary diff attribute' '
 	test_cmp expect actual
 '

-cat >nul_to_q_textconv <<'EOF'
-#!/bin/sh
-"$PERL_PATH" -pe 'y/\000/Q/' < "$1"
-EOF
-chmod +x nul_to_q_textconv
-
 test_expect_success 'setup textconv filters' '
+	write_script nul_to_q_textconv <<-\EOF &&
+	tr "\000" "Q" <"$1"
+	EOF
 	echo a diff=foo >.gitattributes &&
 	git config diff.foo.textconv "\"$(pwd)\""/nul_to_q_textconv
 '
--- a/t/t8001-annotate.sh
+++ b/t/t8001-annotate.sh
@@ -7,6 +7,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_CREATE_REPO_NO_TEMPLATE=1
 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping annotate tests; Perl not available'
+	test_done
+fi
+
 PROG='git annotate'
 . "$TEST_DIRECTORY"/annotate-tests.sh

--- a/t/t8002-blame.sh
+++ b/t/t8002-blame.sh
@@ -7,6 +7,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_CREATE_REPO_NO_TEMPLATE=1
 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping blame colors tests; Perl not available'
+	test_done
+fi
+
 PROG='git blame -c'
 . "$TEST_DIRECTORY"/annotate-tests.sh

@@ -101,7 +107,7 @@ test_expect_success 'set up abbrev tests' '
 		expect=$1 && shift &&
 		echo $sha1 | cut -c 1-$expect >expect &&
 		git blame "$@" abbrev.t >actual &&
-		perl -lne "/[0-9a-f]+/ and print \$&" <actual >actual.sha &&
+		sed -n "s/^[\^]\{0,1\}\([0-9a-f][0-9a-f]*\).*/\1/p" actual >actual.sha &&
 		test_cmp expect actual.sha
 	}
 '
--- a/t/t8006-blame-textconv.sh
+++ b/t/t8006-blame-textconv.sh
@@ -11,7 +11,7 @@ find_blame() {
 cat >helper <<'EOF'
 #!/bin/sh
 grep -q '^bin: ' "$1" || { echo "E: $1 is not \"binary\" file" 1>&2; exit 1; }
-"$PERL_PATH" -p -e 's/^bin: /converted: /' "$1"
+sed 's/^bin: /converted: /' "$1"
 EOF
 chmod +x helper

--- a/t/t8011-blame-split-file.sh
+++ b/t/t8011-blame-split-file.sh
@@ -81,7 +81,7 @@ do
 		git blame --root -C --$output combined >output
 	'

-	test_expect_success "$output output finds correct commits" '
+	test_expect_success PERL_TEST_HELPERS "$output output finds correct commits" '
 		generate_expect >expect <<-\EOF &&
 		5 base
 		1 modified
@@ -93,7 +93,7 @@ do
 		test_cmp expect actual
 	'

-	test_expect_success "$output output shows correct filenames" '
+	test_expect_success PERL_TEST_HELPERS "$output output shows correct filenames" '
 		generate_expect >expect <<-\EOF &&
 		11 one
 		11 two
@@ -102,7 +102,7 @@ do
 		test_cmp expect actual
 	'

-	test_expect_success "$output output shows correct previous pointer" '
+	test_expect_success PERL_TEST_HELPERS "$output output shows correct previous pointer" '
 		generate_expect >expect <<-EOF &&
 		5 NONE
 		1 $(git rev-parse modified^) one
--- a/t/t8012-blame-colors.sh
+++ b/t/t8012-blame-colors.sh
@@ -7,6 +7,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_CREATE_REPO_NO_TEMPLATE=1
 . ./test-lib.sh

+if ! test_have_prereq PERL_TEST_HELPERS
+then
+	skip_all='skipping blame colors tests; Perl not available'
+	test_done
+fi
+
 PROG='git blame -c'
 . "$TEST_DIRECTORY"/annotate-tests.sh

--- a/t/t9137-git-svn-dcommit-clobber-series.sh
+++ b/t/t9137-git-svn-dcommit-clobber-series.sh
@@ -20,8 +20,8 @@ test_expect_success '(supposedly) non-conflicting change from SVN' '
 	test x"$(sed -n -e 61p < file)" = x61 &&
 	svn_cmd co "$svnrepo" tmp &&
 	(cd tmp &&
-		perl -i.bak -p -e "s/^58$/5588/" file &&
-		perl -i.bak -p -e "s/^61$/6611/" file &&
+		sed -e "s/^58$/5588/" -e "s/^61$/6611/" file >file.munged &&
+		mv file.munged file &&
 		poke file &&
 		test x"$(sed -n -e 58p < file)" = x5588 &&
 		test x"$(sed -n -e 61p < file)" = x6611 &&
@@ -40,8 +40,10 @@ test_expect_success 'some unrelated changes to git' "
 test_expect_success 'change file but in unrelated area' "
 	test x\"\$(sed -n -e 4p < file)\" = x4 &&
 	test x\"\$(sed -n -e 7p < file)\" = x7 &&
-	perl -i.bak -p -e 's/^4\$/4444/' file &&
-	perl -i.bak -p -e 's/^7\$/7777/' file &&
+	sed -e 's/^4\$/4444/' \
+	    -e 's/^7\$/7777/' \
+		file >file.munged &&
+	mv file.munged file &&
 	test x\"\$(sed -n -e 4p < file)\" = x4444 &&
 	test x\"\$(sed -n -e 7p < file)\" = x7777 &&
 	git commit -m '4 => 4444, 7 => 7777' file &&
--- a/t/t9350-fast-export.sh
+++ b/t/t9350-fast-export.sh
@@ -726,7 +726,7 @@ test_expect_success 'directory becomes symlink'        '
 	(cd result && git show main:foo)
 '

-test_expect_success 'fast-export quotes pathnames' '
+test_expect_success PERL_TEST_HELPERS 'fast-export quotes pathnames' '
 	git init crazy-paths &&
 	test_config -C crazy-paths core.protectNTFS false &&
 	(cd crazy-paths &&
--- a/t/t9850-shell.sh
+++ b/t/t9850-shell.sh
@@ -30,7 +30,7 @@ test_expect_success 'shell allows interactive command' '
 '

 test_expect_success 'shell complains of overlong commands' '
-	perl -e "print \"a\" x 2**12 for (0..2**19)" |
+	test-tool genzeros | tr "\000" "a" |
 	test_must_fail git shell 2>err &&
 	grep "too long" err
 '
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -88,15 +88,15 @@ test_decode_color () {
 }

 lf_to_nul () {
-	perl -pe 'y/\012/\000/'
+	tr '\012' '\000'
 }

 nul_to_q () {
-	perl -pe 'y/\000/Q/'
+	tr '\000' 'Q'
 }

 q_to_nul () {
-	perl -pe 'y/Q/\000/'
+	tr 'Q' '\000'
 }

 q_to_cr () {
@@ -1645,17 +1645,7 @@ test_match_signal () {

 # 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"
+	dd ibs=1 count="$1" 2>/dev/null
 }

 # run "$@" inside a non-git directory
@@ -1994,7 +1984,7 @@ test_remote_https_urls() {
 # Print the destination of symlink(s) provided as arguments. Basically
 # the same as the readlink command, but it's not available everywhere.
 test_readlink () {
-	perl -le 'print readlink($_) for @ARGV' "$@"
+	test-tool path-utils readlink "$@"
 }

 # Set mtime to a fixed "magic" timestamp in mid February 2009, before we
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -499,24 +499,20 @@ EDITOR=:
 # /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 $("$PERL_PATH" -e '
-	my @env = keys %ENV;
-	my $ok = join("|", qw(
-		TRACE
-		DEBUG
-		TEST
-		.*_TEST
-		PROVE
-		VALGRIND
-		UNZIP
-		PERF_
-		CURL_VERBOSE
-		TRACE_CURL
-		BUILD_DIR
-	));
-	my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
-	print join("\n", @vars);
-')
+unset VISUAL EMAIL LANGUAGE $(env | sed -n \
+	-e '/^GIT_TRACE/d' \
+	-e '/^GIT_DEBUG/d' \
+	-e '/^GIT_TEST/d' \
+	-e '/^GIT_.*_TEST/d' \
+	-e '/^GIT_PROVE/d' \
+	-e '/^GIT_VALGRIND/d' \
+	-e '/^GIT_UNZIP/d' \
+	-e '/^GIT_PERF_/d' \
+	-e '/^GIT_CURL_VERBOSE/d' \
+	-e '/^GIT_TRACE_CURL/d' \
+	-e '/^GIT_BUILD_DIR/d' \
+	-e 's/^\(GIT_[^=]*\)=.*/\1/p'
+)
 unset XDG_CACHE_HOME
 unset XDG_CONFIG_HOME
 unset GITPERLLIB
@@ -1523,6 +1519,22 @@ then
 	export LSAN_OPTIONS
 fi

+if test -z "$PERL_PATH"
+then
+	case "${GIT_TEST_CHAIN_LINT:-unset}" in
+	unset)
+		GIT_TEST_CHAIN_LINT=0
+		;;
+	0)
+		# The user has explicitly disabled the chain linter, so we
+		# don't have anything to worry about.
+		;;
+	*)
+		BAIL_OUT 'You need Perl for the chain linter'
+		;;
+	esac
+fi
+
 if test "${GIT_TEST_CHAIN_LINT:-1}" != 0 &&
   test "${GIT_TEST_EXT_CHAIN_LINT:-1}" != 0
 then
@@ -1694,6 +1706,7 @@ test -n "$USE_LIBPCRE2" && test_set_prereq LIBPCRE2
 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 test -n "$SANITIZE_LEAK" && test_set_prereq SANITIZE_LEAK
 test -n "$GIT_VALGRIND_ENABLED" && test_set_prereq VALGRIND
+test -n "$PERL_PATH" && test_set_prereq PERL_TEST_HELPERS

 if test -z "$GIT_TEST_CHECK_CACHE_TREE"
 then