remove leak in tr/ascii/utf8/

[perl5.git] / TestInit.pm

diff --git a/TestInit.pm b/TestInit.pm
index f9a5e91..7f53664 100644 (file)
--- 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.
@@ -24,11 +43,14 @@ $VERSION = 1.04;
 # which live dual lives on CPAN.
 # Don't interfere with the taintedness of %ENV, this could perturbate tests.
 # This feels like a better solution than the original, from
-# http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2003-07/msg00154.html
+# Message-ID: 20030703145818.5bdd2873.rgarciasuarez@free.fr
+# https://www.nntp.perl.org/group/perl.perl5.porters/2003/07/msg77533.html
 $ENV{PERL_CORE} = $^X;
 
 $0 =~ s/\.dp$//; # for the test.deparse make target
 
+my $add_dot = (@INC && $INC[-1] eq '.'); # preserve existing,
+
 sub import {
     my $self = shift;
     my @up_2_t = ('../../lib', '../../t');
@@ -47,8 +69,10 @@ sub import {
        } elsif ($_ eq 'T') {
            $chdir = '..'
                unless -f 't/TEST' && -f 'MANIFEST' && -d 'lib' && -d 'ext';
-           @INC = qw/ lib . /;
+           @INC = 'lib';
            $setopt = 1;
+       } elsif ($_ eq 'DOT') {
+            $add_dot = 1;
        } else {
            die "Unknown option '$_'";
        }
@@ -118,7 +142,7 @@ sub import {
        }
     }
 
-    push @INC, '.' unless ${^TAINT};
+    push @INC, '.' if $add_dot;
 }
 
 1;