[PATCH] Make sure $PERL_PATH is defined when the test suite is run.

["Philippe Bruhat (BooK)" <book@cpan.org>]

Some test scripts run Perl scripts as if they were git-* scripts, and
thus need to use the same perl that will be put in the shebang line of
git*.perl commands. $PERL_PATH therefore needs to be used instead of
a bare "perl".

The tests can fail if another perl is found in $PATH before the one
defined in $PERL_PATH.

Example test failure caused by this: the perl defined in $PERL_PATH has
Error.pm installed, and therefore the Git.pm's Makefile.PL doesn't install
the private copy. The perl from $PATH doesn't have Error.pm installed, and
all git*.perl scripts invoked during the test will fail loading Error.pm.

Makefile patch by Jeff King <peff@peff.net>.

Signed-off-by: Philippe Bruhat (BooK) <book@cpan.org>
---
 Makefile                        |    1 +
 t/t9400-git-cvsserver-server.sh |    2 +-
 t/t9401-git-cvsserver-crlf.sh   |    2 +-
 t/t9700-perl-git.sh             |    4 ++--
 4 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 35f5294..8e8f981 100644
--- a/Makefile
+++ b/Makefile
@@ -1633,6 +1633,7 @@ GIT-CFLAGS: .FORCE-GIT-CFLAGS
 # and the first level quoting from the shell that runs "echo".
 GIT-BUILD-OPTIONS: .FORCE-GIT-BUILD-OPTIONS
 	@echo SHELL_PATH=\''$(subst ','\'',$(SHELL_PATH_SQ))'\' >$@
+	@echo PERL_PATH=\''$(subst ','\'',$(PERL_PATH_SQ))'\' >$@
 	@echo TAR=\''$(subst ','\'',$(subst ','\'',$(TAR)))'\' >>$@
 	@echo NO_CURL=\''$(subst ','\'',$(subst ','\'',$(NO_CURL)))'\' >>$@
 	@echo NO_PERL=\''$(subst ','\'',$(subst ','\'',$(NO_PERL)))'\' >>$@
diff --git a/t/t9400-git-cvsserver-server.sh b/t/t9400-git-cvsserver-server.sh
index 64f947d..c2ec3cb 100755
--- a/t/t9400-git-cvsserver-server.sh
+++ b/t/t9400-git-cvsserver-server.sh
@@ -20,7 +20,7 @@ then
     say 'skipping git-cvsserver tests, cvs not found'
     test_done
 fi
-perl -e 'use DBI; use DBD::SQLite' >/dev/null 2>&1 || {
+"$PERL_PATH" -e 'use DBI; use DBD::SQLite' >/dev/null 2>&1 || {
     say 'skipping git-cvsserver tests, Perl SQLite interface unavailable'
     test_done
 }
diff --git a/t/t9401-git-cvsserver-crlf.sh b/t/t9401-git-cvsserver-crlf.sh
index aca40c1..40637d6 100755
--- a/t/t9401-git-cvsserver-crlf.sh
+++ b/t/t9401-git-cvsserver-crlf.sh
@@ -57,7 +57,7 @@ then
     say 'skipping git-cvsserver tests, perl not available'
     test_done
 fi
-perl -e 'use DBI; use DBD::SQLite' >/dev/null 2>&1 || {
+"$PERL_PATH" -e 'use DBI; use DBD::SQLite' >/dev/null 2>&1 || {
     say 'skipping git-cvsserver tests, Perl SQLite interface unavailable'
     test_done
 }
diff --git a/t/t9700-perl-git.sh b/t/t9700-perl-git.sh
index 4eb7d3f..96a2e55 100755
--- a/t/t9700-perl-git.sh
+++ b/t/t9700-perl-git.sh
@@ -11,7 +11,7 @@ if ! test_have_prereq PERL; then
 	test_done
 fi
 
-perl -MTest::More -e 0 2>/dev/null || {
+"$PERL_PATH" -MTest::More -e 0 2>/dev/null || {
 	say "Perl Test::More unavailable, skipping test"
 	test_done
 }
@@ -48,6 +48,6 @@ test_expect_success \
 
 test_external_without_stderr \
     'Perl API' \
-    perl "$TEST_DIRECTORY"/t9700/test.pl
+    $PERL_PATH "$TEST_DIRECTORY"/t9700/test.pl
 
 test_done
-- 
1.6.0.3.517.g759a