Revert commit 59c2e8, add test for PM_FILTER, fix RT-144085

.appveyor.yml

@@ -15,9 +15,16 @@ skip_tags: true     ## do not build on tags
 
 environment:
   matrix:
+    # this has dmake "Version 4.12 (Windows / MinGW)"
     - Perl_VERSION: "5.12"
-    - Perl_VERSION: "5.10"
-    - Perl_VERSION: "5.8.9"
+    # these have dmake -V "Version 4.8-20070327-SHAY (Windows / MS Visual C++)"
+    # which appear to be broken with the PM_FILTER fix; when running `dmake`
+    # with EUMM's Makefile, it says
+    # "C:\strawberry\perl\bin\perl.exe" "-Iblib\arch" "-Iblib\lib" -MExtUtils::Command -e mkpath -- blib\lib\ExtUtils
+    # The system cannot find the path specified.
+    # dmake:  Error code 129, while making 'blib\lib\ExtUtils\.exists'
+    # - Perl_VERSION: "5.10"
+    # - Perl_VERSION: "5.8.9"
   global:
     AUTOMATED_TESTING: 1
     CI_CACHE_DIR: "C:\\cache"
@@ -130,12 +137,12 @@ before_build:
 
 build_script:
   - ps: ; write-host $("[{0:HH:mm:ss}].build.build_script" -f $($mark = get-date; $mark)) -f darkgray
-  - ps: . "${env:CI_HELPERS}\#build-build_script.PS1"
+  - dmake NOECHO=
   - ps: ; write-host $("[{0:HH:mm:ss}].build.build_script ... done ({1:0.0}s)" -f $(get-date; $($(get-date) - $mark).totalseconds)) -f green
 
 test_script:
   - ps: ; write-host $("[{0:HH:mm:ss}].test.test_script" -f $($mark = get-date; $mark)) -f darkgray
-  - ps: . "${env:CI_HELPERS}\#test-test_script.PS1"
+  - dmake test NOECHO=
   - ps: ; write-host $("[{0:HH:mm:ss}].test.test_script ... done ({1:0.0}s)" -f $(get-date; $($(get-date) - $mark).totalseconds)) -f green
 
 after_test:

lib/ExtUtils/MM_Any.pm

@@ -2499,6 +2499,10 @@ sub tools_other {
     my($self) = shift;
     my @m;
 
+    my $is_nmake = $self->is_make_type('nmake');
+    push @m, <<'EOF' if $is_nmake;
+EUMM_NMAKE_HASH = ^# # to get hash character into strings - yes, horrible
+EOF
     # We set PM_FILTER as late as possible so it can see all the earlier
     # on macro-order sensitive makes such as nmake.
     for my $tool (qw{ SHELL CHMOD CP MV NOOP NOECHO RM_F RM_RF TEST_F TOUCH
@@ -2515,8 +2519,14 @@ sub tools_other {
                       CP_NONEMPTY
                     } )
     {
-        next unless defined $self->{$tool};
-        push @m, "$tool = $self->{$tool}\n";
+        next unless defined(my $value = $self->{$tool});
+        # https://learn.microsoft.com/en-us/cpp/build/reference/contents-of-a-makefile?view=msvc-170#special-characters-in-a-makefile
+        if ($is_nmake) {
+          $value =~ s/#/\$(EUMM_NMAKE_HASH)/g
+        } else {
+          $value =~ s/#/\\#/g
+        }
+        push @m, "$tool = $value\n";
     }
 
     return join "", @m;

lib/ExtUtils/MM_Unix.pm

@@ -2151,11 +2151,6 @@ sub init_PERL {
     # already escaped spaces.
     $self->{FULLPERL} =~ tr/"//d if $Is{VMS};
 
-    # `dmake` can fail for image (aka, executable) names which start with double-quotes
-    # * push quote inward by at least one character (or the drive prefix, if present)
-    # * including any initial directory separator preserves the `file_name_is_absolute` property
-    $self->{FULLPERL} =~ s/^"(\S(:\\|:)?)/$1"/ if $self->is_make_type('dmake');
-
     # Little hack to get around VMS's find_perl putting "MCR" in front
     # sometimes.
     $self->{ABSPERL} = $self->{PERL};
@@ -2178,11 +2173,6 @@ sub init_PERL {
     # already escaped spaces.
     $self->{PERL} =~ tr/"//d if $Is{VMS};
 
-    # `dmake` can fail for image (aka, executable) names which start with double-quotes
-    # * push quote inward by at least one character (or the drive prefix, if present)
-    # * including any initial directory separator preserves the `file_name_is_absolute` property
-    $self->{PERL} =~ s/^"(\S(:\\|:)?)/$1"/ if $self->is_make_type('dmake');
-
     # Are we building the core?
     $self->{PERL_CORE} = $ENV{PERL_CORE} unless exists $self->{PERL_CORE};
     $self->{PERL_CORE} = 0               unless defined $self->{PERL_CORE};
@@ -3201,11 +3191,17 @@ pm_to_blib : $(FIRST_MAKEFILE) $(TO_INST_PM)
 
     # VMS will swallow '' and PM_FILTER is often empty.  So use q[]
     my $pm_to_blib = $self->oneliner(<<CODE, ['-MExtUtils::Install']);
-pm_to_blib({\@ARGV}, '$autodir', q[\$(PM_FILTER)], '\$(PERM_DIR)')
+\$i=0; \$i++ until \$i > \$#ARGV or \$ARGV[\$i] eq "--";
+die "Failed to find -- in ".join("|",\@ARGV) if \$i > \$#ARGV;
+\@parts=splice \@ARGV,0,\$i+1;
+pop \@parts; \$filter=join " ", map qq{"\$_"}, \@parts;
+pm_to_blib({\@ARGV}, '$autodir', \$filter, '\$(PERM_DIR)')
 CODE
+    $pm_to_blib .= q[ $(PM_FILTER) --];
 
     my @cmds = $self->split_command($pm_to_blib,
-                  map { ($self->quote_literal($_) => $self->quote_literal($self->{PM}->{$_})) } sort keys %{$self->{PM}});
+      map +($self->quote_literal($_) => $self->quote_literal($self->{PM}{$_})),
+        sort keys %{$self->{PM}});
 
     $r .= join '', map { "\t\$(NOECHO) $_\n" } @cmds;
     $r .= qq{\t\$(NOECHO) \$(TOUCH) pm_to_blib\n};

lib/ExtUtils/MakeMaker.pm

@@ -693,7 +693,6 @@ END
             } else {
                 my $value = $self->{$key};
                 # not going to test in FS so only stripping start
-                $value =~ s/"// if $key =~ /PERL$/ and $self->is_make_type('dmake');
                 $value =~ s/^"// if $key =~ /PERL$/;
                 $value = $self->catdir("..", $value)
                   unless $self->file_name_is_absolute($value);
@@ -2650,17 +2649,13 @@ to stdout) that is passed on each .pm file during the build (in the
 pm_to_blib() phase).  It is empty by default, meaning no filtering is done.
 You could use:
 
-  PM_FILTER => 'perl -ne "print unless /^\\#/"',
+  PM_FILTER => 'perl -ne "print unless /^#/"',
 
 to remove all the leading comments on the fly during the build.  In order
 to be as portable as possible, please consider using a Perl one-liner
-rather than Unix (or other) utilities, as above.  The # is escaped for
-the Makefile, since what is going to be generated will then be:
-
-  PM_FILTER = perl -ne "print unless /^\#/"
-
-Without the \ before the #, we'd have the start of a Makefile comment,
-and the macro would be incorrectly defined.
+rather than Unix (or other) utilities, as above. MakeMaker will escape the
+C<#> for the Makefile, since what goes in the Makefile will depend on
+which C<make> implementation is being targeted.
 
 You will almost certainly be better off using the C<PL_FILES> system,
 instead. See above, or the L<ExtUtils::MakeMaker::FAQ> entry.

t/basic.t

@@ -25,7 +25,7 @@ use ExtUtils::MM;
 use Test::More
     !MM->can_run(make()) && $ENV{PERL_CORE} && $Config{'usecrosscompile'}
     ? (skip_all => "cross-compiling and make not available")
-    : (tests => 195);
+    : (tests => 198);
 use File::Find;
 use File::Spec;
 use File::Path;
@@ -472,6 +472,18 @@ $realclean_out = run("$make realclean");
 rmtree 'Liar';
 rmtree $DUMMYINST;
 
+# test PM_FILTER - RT#144085
+$text = $preserve_MPL;
+ok(($text =~ s:\);:    PM_FILTER => '\$(ABSPERLRUN) -ne "print unless /^#/"',\n$&:), 'successful M.PL edit');
+write_file($file, $text);
+@mpl_out = run(qq{$perl Makefile.PL});
+$test_out = run("$make test NOECHO=");
+like( $test_out, qr/All tests successful/, 'make test' );
+is( $?, 0,                                 '  exited normally' ) ||
+    diag $test_out;
+write_file($file, $preserve_MPL); # restore Makefile.PL
+$realclean_out = run("$make realclean");
+
 sub _normalize {
     my $hash = shift;
     %$hash= map { lc($_) => $hash->{$_} } keys %$hash;