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inc/inc_Module-Build/Module/Build/Platform/Windows.pm  view on Meta::CPAN

    $linenum++;
    if ( $line =~ /^:endofperl\b/ ) {
      if (!exists $opts{update}) {
        warn "$opts{in} has already been converted to a batch file!\n";
        return;
      }
      $taildone++;
    }
    if ( not $linedone and $line =~ /^#!.*perl/ ) {
      if (exists $opts{update}) {
        $skiplines = $linenum - 1;
        $line .= "#line ".(1+$headlines)."\n";
      } else {
	$line .= "#line ".($linenum+$headlines)."\n";
      }
	$linedone++;
    }
    if ( $line =~ /^#\s*line\b/ and $linenum == 2 + $skiplines ) {
      $line = "";
    }
  }

  my $out = IO::File->new("> $opts{out}") or die "Can't open $opts{out}: $!";
  print $out $head;
  print $out $start, ( $opts{usewarnings} ? " -w" : "" ),
             "\n#line ", ($headlines+1), "\n" unless $linedone;
  print $out @file[$skiplines..$#file];
  print $out $tail unless $taildone;
  $out->close;

  return $opts{out};
}


sub _quote_args {
  # Returns a string that can become [part of] a command line with
  # proper quoting so that the subprocess sees this same list of args.
  my ($self, @args) = @_;

  my @quoted;

  for (@args) {
    if ( /^[^\s*?!\$<>;|'"\[\]\{\}]+$/ ) {
      # Looks pretty safe
      push @quoted, $_;
    } else {
      # XXX this will obviously have to improve - is there already a
      # core module lying around that does proper quoting?
      s/"/\\"/g;
      push @quoted, qq("$_");
    }
  }

  return join " ", @quoted;
}


sub split_like_shell {
  # As it turns out, Windows command-parsing is very different from
  # Unix command-parsing.  Double-quotes mean different things,
  # backslashes don't necessarily mean escapes, and so on.  So we
  # can't use Text::ParseWords::shellwords() to break a command string
  # into words.  The algorithm below was bashed out by Randy and Ken
  # (mostly Randy), and there are a lot of regression tests, so we
  # should feel free to adjust if desired.

  (my $self, local $_) = @_;

  return @$_ if defined() && UNIVERSAL::isa($_, 'ARRAY');

  my @argv;
  return @argv unless defined() && length();

  my $arg = '';
  my( $i, $quote_mode ) = ( 0, 0 );

  while ( $i < length() ) {

    my $ch      = substr( $_, $i  , 1 );
    my $next_ch = substr( $_, $i+1, 1 );

    if ( $ch eq '\\' && $next_ch eq '"' ) {
      $arg .= '"';
      $i++;
    } elsif ( $ch eq '\\' && $next_ch eq '\\' ) {
      $arg .= '\\';
      $i++;
    } elsif ( $ch eq '"' && $next_ch eq '"' && $quote_mode ) {
      $quote_mode = !$quote_mode;
      $arg .= '"';
      $i++;
    } elsif ( $ch eq '"' && $next_ch eq '"' && !$quote_mode &&
	      ( $i + 2 == length()  ||
		substr( $_, $i + 2, 1 ) eq ' ' )
	    ) { # for cases like: a"" => [ 'a' ]
      push( @argv, $arg );
      $arg = '';
      $i += 2;
    } elsif ( $ch eq '"' ) {
      $quote_mode = !$quote_mode;
    } elsif ( $ch eq ' ' && !$quote_mode ) {
      push( @argv, $arg ) if $arg;
      $arg = '';
      ++$i while substr( $_, $i + 1, 1 ) eq ' ';
    } else {
      $arg .= $ch;
    }

    $i++;
  }

  push( @argv, $arg ) if defined( $arg ) && length( $arg );
  return @argv;
}


# system(@cmd) does not like having double-quotes in it on Windows.
# So we quote them and run it as a single command.
sub do_system {
  my ($self, @cmd) = @_;