initial commit

api/perl/inc/Module/Install/Can.pm

@@ -0,0 +1,81 @@
+#line 1
+package Module::Install::Can;
+
+use strict;
+use Config                ();
+use File::Spec            ();
+use ExtUtils::MakeMaker   ();
+use Module::Install::Base ();
+
+use vars qw{$VERSION @ISA $ISCORE};
+BEGIN {
+	$VERSION = '1.00';
+	@ISA     = 'Module::Install::Base';
+	$ISCORE  = 1;
+}
+
+# check if we can load some module
+### Upgrade this to not have to load the module if possible
+sub can_use {
+	my ($self, $mod, $ver) = @_;
+	$mod =~ s{::|\\}{/}g;
+	$mod .= '.pm' unless $mod =~ /\.pm$/i;
+
+	my $pkg = $mod;
+	$pkg =~ s{/}{::}g;
+	$pkg =~ s{\.pm$}{}i;
+
+	local $@;
+	eval { require $mod; $pkg->VERSION($ver || 0); 1 };
+}
+
+# check if we can run some command
+sub can_run {
+	my ($self, $cmd) = @_;
+
+	my $_cmd = $cmd;
+	return $_cmd if (-x $_cmd or $_cmd = MM->maybe_command($_cmd));
+
+	for my $dir ((split /$Config::Config{path_sep}/, $ENV{PATH}), '.') {
+		next if $dir eq '';
+		my $abs = File::Spec->catfile($dir, $_[1]);
+		return $abs if (-x $abs or $abs = MM->maybe_command($abs));
+	}
+
+	return;
+}
+
+# can we locate a (the) C compiler
+sub can_cc {
+	my $self   = shift;
+	my @chunks = split(/ /, $Config::Config{cc}) or return;
+
+	# $Config{cc} may contain args; try to find out the program part
+	while (@chunks) {
+		return $self->can_run("@chunks") || (pop(@chunks), next);
+	}
+
+	return;
+}
+
+# Fix Cygwin bug on maybe_command();
+if ( $^O eq 'cygwin' ) {
+	require ExtUtils::MM_Cygwin;
+	require ExtUtils::MM_Win32;
+	if ( ! defined(&ExtUtils::MM_Cygwin::maybe_command) ) {
+		*ExtUtils::MM_Cygwin::maybe_command = sub {
+			my ($self, $file) = @_;
+			if ($file =~ m{^/cygdrive/}i and ExtUtils::MM_Win32->can('maybe_command')) {
+				ExtUtils::MM_Win32->maybe_command($file);
+			} else {
+				ExtUtils::MM_Unix->maybe_command($file);
+			}
+		}
+	}
+}
+
+1;
+
+__END__
+
+#line 156