X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/a14453b94fa229e50f3dc0e7cc4b9a763b933cb6..a281f16cacceabade4e75fbbbeb567285d462ba0:/TestInit.pm

diff --git a/TestInit.pm b/TestInit.pm
index c921686..bab5aea 100644
--- a/TestInit.pm
+++ b/TestInit.pm
@@ -1,6 +1,5 @@
 # This is a replacement for the old BEGIN preamble which heads (or
-# should head) up every core test program to prepare it for running.
-# Now instead of:
+# should head) up every core test program to prepare it for running:
 #
 # BEGIN {
 #   chdir 't' if -d 't';
@@ -10,8 +9,28 @@
 # Its primary purpose is to clear @INC so core tests don't pick up
 # modules from an installed Perl.
 #
-# t/TEST will use -MTestInit.  You may "use TestInit" in the test
-# programs but it is not required.
+# t/TEST and t/harness will invoke each test script with
+#      perl -I. -MTestInit[=arg,arg,..] some/test.t
+# You may "use TestInit" in the test # programs but it is not required.
+#
+# TestInit will completely empty the current @INC and replace it with
+# new entries based on the args:
+#
+#    U2T: adds ../../lib and ../../t;
+#    U1:  adds ../lib;
+#    T:   adds lib  and chdir's to the top-level directory.
+#
+# In the absence of any of the above options, it chdir's to
+#  t/ or cpan/Foo-Bar/ etc as appropriate and correspondingly
+#  sets @INC to (../lib) or ( ../../lib, ../../t)
+#
+# In addition,
+#
+#   A:   converts any added @INC entries to absolute paths;
+#   NC:  unsets $ENV{PERL_CORE};
+#   DOT: unconditionally appends '.' to @INC.
+#
+# Any trailing '.' in @INC present on entry will be preserved.
 #
 # P.S. This documentation is not in POD format in order to avoid
 # problems when there are fundamental bugs in perl.
@@ -27,43 +46,20 @@ $VERSION = 1.04;
 # http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2003-07/msg00154.html
 $ENV{PERL_CORE} = $^X;
 
-sub new_inc {
-    if (${^TAINT}) {
-	@INC = @_;
-    } else {
-	@INC = (@_, '.');
-    }
-}
-
-sub set_opt {
-    my $sep;
-    if ($^O eq 'VMS') {
-	$sep = '|';
-    } elsif ($^O eq 'MSWin32') {
-	$sep = ';';
-    } else {
-	$sep = ':';
-    }
+$0 =~ s/\.dp$//; # for the test.deparse make target
 
-    my $lib = join $sep, @_;
-    if (exists $ENV{PERL5LIB}) {
-	$ENV{PERL5LIB} = $lib . substr $ENV{PERL5LIB}, 0, 0;
-    } else {
-	$ENV{PERL5LIB} = $lib;
-    }
-}
+my $add_dot = (@INC && $INC[-1] eq '.'); # preserve existing,
 
 sub import {
     my $self = shift;
     my @up_2_t = ('../../lib', '../../t');
-    my @new_inc;
     my ($abs, $chdir, $setopt);
     foreach (@_) {
 	if ($_ eq 'U2T') {
-	    @new_inc = @up_2_t;
+	    @INC = @up_2_t;
 	    $setopt = 1;
 	} elsif ($_ eq 'U1') {
-	    @new_inc = '../lib';
+	    @INC = '../lib';
 	    $setopt = 1;
 	} elsif ($_ eq 'NC') {
 	    delete $ENV{PERL_CORE}
@@ -72,8 +68,10 @@ sub import {
 	} elsif ($_ eq 'T') {
 	    $chdir = '..'
 		unless -f 't/TEST' && -f 'MANIFEST' && -d 'lib' && -d 'ext';
-	    @new_inc = 'lib';
+	    @INC = 'lib';
 	    $setopt = 1;
+	} elsif ($_ eq 'DOT') {
+            $add_dot = 1;
 	} else {
 	    die "Unknown option '$_'";
 	}
@@ -82,26 +80,35 @@ sub import {
     # Need to default. This behaviour is consistent with previous behaviour,
     # as the equivalent of this code used to be run at the top level, hence
     # would happen (unconditionally) before import() was called.
-    unless (@new_inc) {
+    unless ($setopt) {
 	if (-f 't/TEST' && -f 'MANIFEST' && -d 'lib' && -d 'ext') {
 	    # We're being run from the top level. Try to change directory, and
 	    # set things up correctly. This is a 90% solution, but for
 	    # hand-running tests, that's good enough
-	    if ($0 =~ s!^((?:ext|dist|cpan)[\\/][^\\/]+)[\//](.*\.t)$!$2!) {
+	    if ($0 =~ s!^((?:ext|dist|cpan)[\\/][^\\/]+)[\\/](.*\.t)$!$2!) {
 		# Looks like a test in ext.
 		$chdir = $1;
-		@new_inc = @up_2_t;
+		@INC = @up_2_t;
 		$setopt = 1;
-		$^X =~ s!^\.([/\\])!..$1..$1!;
+		$^X =~ s!^\.([\\/])!..$1..$1!;
 	    } else {
 		$chdir = 't';
-		@new_inc = '../lib';
+		@INC = '../lib';
 		$setopt = $0 =~ m!^lib/!;
 	    }
 	} else {
 	    # (likely) we're being run by t/TEST or t/harness, and we're a test
 	    # in t/
-	    @new_inc = '../lib';
+	    if (defined &DynaLoader::boot_DynaLoader) {
+		@INC = '../lib';
+	    }
+	    else {
+		# miniperl/minitest
+		# t/TEST does not supply -I../lib, so buildcustomize.pl is
+		# not automatically included.
+		unshift @INC, '../lib';
+		do "../lib/buildcustomize.pl";
+	    }
 	}
     }
 
@@ -110,18 +117,31 @@ sub import {
     }
 
     if ($abs) {
-	@INC = @new_inc;
 	require File::Spec::Functions;
 	# Forcibly untaint this.
-	@new_inc = map { $_ = File::Spec::Functions::rel2abs($_); /(.*)/; $1 }
-	    @new_inc;
+	@INC = map { $_ = File::Spec::Functions::rel2abs($_); /(.*)/; $1 } @INC;
 	$^X = File::Spec::Functions::rel2abs($^X);
     }
 
-    new_inc(@new_inc);
-    set_opt(@new_inc) if $setopt;
+    if ($setopt) {
+	my $sep;
+	if ($^O eq 'VMS') {
+	    $sep = '|';
+	} elsif ($^O eq 'MSWin32') {
+	    $sep = ';';
+	} else {
+	    $sep = ':';
+	}
+
+	my $lib = join $sep, @INC;
+	if (exists $ENV{PERL5LIB}) {
+	    $ENV{PERL5LIB} = $lib . substr $ENV{PERL5LIB}, 0, 0;
+	} else {
+	    $ENV{PERL5LIB} = $lib;
+	}
+    }
+
+    push @INC, '.' if $add_dot;
 }
 
-$0 =~ s/\.dp$//; # for the test.deparse make target
 1;
-