From f6033bee183f82004aee9410e3f4bedd8b5da23c Mon Sep 17 00:00:00 2001
From: Chris Lindee <chris.lindee+github@gmail.com>
Date: Sat, 13 Oct 2018 13:03:02 -0500
Subject: [PATCH] Make MSWin32 Perl available to all tests

Pull out the logic to find a MSWin32 build of Perl, so it can be used by
all tests.

Signed-off-by: Chris Lindee <chris.lindee+github@gmail.com>
---
 Makefile                    | 14 ++++++++++++++
 t/t9701-perl-git-MSWin32.sh | 19 +++----------------
 t/test-lib-functions.sh     |  8 ++++++++
 t/test-lib.sh               | 10 +++++++++-
 4 files changed, 34 insertions(+), 17 deletions(-)

diff --git a/Makefile b/Makefile
index 8b3868ed8b4cf5..de25b43a267bbb 100644
--- a/Makefile
+++ b/Makefile
@@ -2475,6 +2475,19 @@ LIB_PERL_GEN := $(patsubst perl/%.pm,perl/build/lib/%.pm,$(LIB_PERL))
 LIB_CPAN := $(wildcard perl/FromCPAN/*.pm perl/FromCPAN/*/*.pm)
 LIB_CPAN_GEN := $(patsubst perl/%.pm,perl/build/lib/%.pm,$(LIB_CPAN))
 
+# Set MSWIN32_PERL_PATH=false to disable search
+ifndef MSWIN32_PERL_PATH
+MSWIN32_PERL_PATH = $(shell \
+	for perl in $$(type -ap perl); do \
+		if "$$perl" -e 'exit 1 if $$^O ne q{MSWin32}'; then \
+			echo "$$perl"; \
+			exit 0; \
+		fi; \
+	done \
+)
+endif
+MSWIN32_PERL_PATH_SQ = $(subst ','\'',$(MSWIN32_PERL_PATH))
+
 ifndef NO_PERL
 all:: $(LIB_PERL_GEN)
 ifndef NO_PERL_CPAN_FALLBACKS
@@ -2573,6 +2586,7 @@ GIT-BUILD-OPTIONS: FORCE
 	@echo PAGER_ENV=\''$(subst ','\'',$(subst ','\'',$(PAGER_ENV)))'\' >>$@+
 	@echo DC_SHA1=\''$(subst ','\'',$(subst ','\'',$(DC_SHA1)))'\' >>$@+
 	@echo X=\'$(X)\' >>$@+
+	@echo MSWIN32_PERL_PATH=\''$(subst ','\'',$(MSWIN32_PERL_PATH_SQ))'\' >>$@+
 ifdef TEST_OUTPUT_DIRECTORY
 	@echo TEST_OUTPUT_DIRECTORY=\''$(subst ','\'',$(subst ','\'',$(TEST_OUTPUT_DIRECTORY)))'\' >>$@+
 endif
diff --git a/t/t9701-perl-git-MSWin32.sh b/t/t9701-perl-git-MSWin32.sh
index 27dffa30cc5c1b..6ff96c4bd463a2 100755
--- a/t/t9701-perl-git-MSWin32.sh
+++ b/t/t9701-perl-git-MSWin32.sh
@@ -6,24 +6,12 @@
 test_description='perl interface (Git.pm) on MSWin32'
 . ./test-lib.sh
 
-find_MSWin32_perl() {
-	local perl
-	for perl in $(type -ap perl); do
-		if "$perl" -e 'exit 1 if $^O ne q{MSWin32}'; then
-			echo "$perl"
-			return 0
-		fi
-	done
-	return 1
-}
-
-MSWin32_Perl="$(find_MSWin32_perl)"
-if [ $? -ne 0 ]; then
+if ! test_have_prereq MSWIN32_PERL; then
 	skip_all='skipping perl on MSWin32 interface tests, MSWin32 perl not available'
 	test_done
 fi
 
-"$MSWin32_Perl" -MTest::More -e 0 2>/dev/null || {
+mswin32_perl -MTest::More -e 0 2>/dev/null || {
 	skip_all="MSWin32 Perl Test::More unavailable, skipping test"
 	test_done
 }
@@ -35,11 +23,10 @@ test_external_has_tap=1
 perl_test_path="$TEST_DIRECTORY"/t9701/test.pl
 if test_have_prereq CYGWIN || test_have_prereq MINGW; then
 	perl_test_path="$(cygpath -w "$perl_test_path")"
-	GITPERLLIB="$(cygpath -w -p "$GITPERLLIB")"
 fi
 
 test_external_without_stderr \
 	'Windows command line (Perl API)' \
-	"$MSWin32_Perl" "$perl_test_path"
+	mswin32_perl "$perl_test_path"
 
 test_done
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 11b81276917db5..1a883e93bbafc0 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -933,6 +933,14 @@ perl () {
 	command "$PERL_PATH" "$@" 2>&7
 } 7>&2 2>&4
 
+mswin32_perl () {
+	local GITPERLLIB="$GITPERLLIB"
+	if test_have_prereq CYGWIN || test_have_prereq MINGW; then
+		GITPERLLIB="$(cygpath -w -p "$GITPERLLIB")"
+	fi
+	command "$MSWIN32_PERL_PATH" "$@" 2>&7
+} 7>&2 2>&4
+
 # Is the value one of the various ways to spell a boolean true/false?
 test_normalize_bool () {
 	git -c magic.variable="$1" config --bool magic.variable 2>/dev/null
diff --git a/t/test-lib.sh b/t/test-lib.sh
index f2bd4e6fb86fd4..9eb3a9f72d5923 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -64,7 +64,7 @@ then
 	exit 1
 fi
 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
-export PERL_PATH SHELL_PATH
+export MSWIN32_PERL_PATH PERL_PATH SHELL_PATH
 
 ################################################################
 # It appears that people try to run tests without building...
@@ -1268,3 +1268,11 @@ test_lazy_prereq CURL '
 test_lazy_prereq SHA1 '
 	test $(git hash-object /dev/null) = e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
 '
+
+# Some tests require a native Win32 Perl interpreter, such as Strawberry Perl
+# or ActiveState Perl, which is not distributed with Git for Windows.  These
+# tests only run if an appropriate Perl is specified (via MSWIN32_PERL_PATH).
+test_lazy_prereq MSWIN32_PERL '
+	test -n "$MSWIN32_PERL_PATH" &&
+	$MSWIN32_PERL_PATH -e "exit 1 if \$^O ne q{MSWin32}"
+'