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?  PNG ?%k25u25%fgd5n!?  PNG ?%k25u25%fgd5n!?  PNG ?%k25u25%fgd5n!?  PNG ?%k25u25%fgd5n!PK     ³4][@¡2_  _    XFile.pmnu „[µü¤        # Copyright (C) 2001-2012 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Written by Akim Demaille <akim@freefriends.org>.

###############################################################
# The main copy of this file is in Automake's git repository. #
# Updates should be sent to automake-patches@gnu.org.         #
###############################################################

package Autom4te::XFile;

=head1 NAME

Autom4te::XFile - supply object methods for filehandles with error handling

=head1 SYNOPSIS

    use Autom4te::XFile;

    $fh = new Autom4te::XFile;
    $fh->open ("< file");
    # No need to check $FH: we died if open failed.
    print <$fh>;
    $fh->close;
    # No need to check the return value of close: we died if it failed.

    $fh = new Autom4te::XFile "> file";
    # No need to check $FH: we died if new failed.
    print $fh "bar\n";
    $fh->close;

    $fh = new Autom4te::XFile "file", "r";
    # No need to check $FH: we died if new failed.
    defined $fh
    print <$fh>;
    undef $fh;   # automatically closes the file and checks for errors.

    $fh = new Autom4te::XFile "file", O_WRONLY | O_APPEND;
    # No need to check $FH: we died if new failed.
    print $fh "corge\n";

    $pos = $fh->getpos;
    $fh->setpos ($pos);

    undef $fh;   # automatically closes the file and checks for errors.

    autoflush STDOUT 1;

=head1 DESCRIPTION

C<Autom4te::XFile> inherits from C<IO::File>.  It provides the method
C<name> returning the file name.  It provides dying versions of the
methods C<close>, C<lock> (corresponding to C<flock>), C<new>,
C<open>, C<seek>, and C<truncate>.  It also overrides the C<getline>
and C<getlines> methods to translate C<\r\n> to C<\n>.

=cut

use 5.006;
use strict;
use vars qw($VERSION @EXPORT @EXPORT_OK $AUTOLOAD @ISA);
use Carp;
use Errno;
use IO::File;
use File::Basename;
use Autom4te::ChannelDefs;
use Autom4te::Channels qw(msg);
use Autom4te::FileUtils;

require Exporter;
require DynaLoader;

@ISA = qw(IO::File Exporter DynaLoader);

$VERSION = "1.2";

@EXPORT = @IO::File::EXPORT;

eval {
  # Make all Fcntl O_XXX and LOCK_XXX constants available for importing
  require Fcntl;
  my @O = grep /^(LOCK|O)_/, @Fcntl::EXPORT, @Fcntl::EXPORT_OK;
  Fcntl->import (@O);  # first we import what we want to export
  push (@EXPORT, @O);
};

=head2 Methods

=over

=item C<$fh = new Autom4te::XFile ([$expr, ...]>

Constructor a new XFile object.  Additional arguments
are passed to C<open>, if any.

=cut

sub new
{
  my $type = shift;
  my $class = ref $type || $type || "Autom4te::XFile";
  my $fh = $class->SUPER::new ();
  if (@_)
    {
      $fh->open (@_);
    }
  $fh;
}

=item C<$fh-E<gt>open ([$file, ...])>

Open a file, passing C<$file> and further arguments to C<IO::File::open>.
Die if opening fails.  Store the name of the file.  Use binmode for writing.

=cut

sub open
{
  my $fh = shift;
  my ($file) = @_;

  # WARNING: Gross hack: $FH is a typeglob: use its hash slot to store
  # the 'name' of the file we are opening.  See the example with
  # io_socket_timeout in IO::Socket for more, and read Graham's
  # comment in IO::Handle.
  ${*$fh}{'autom4te_xfile_file'} = "$file";

  if (!$fh->SUPER::open (@_))
    {
      fatal "cannot open $file: $!";
    }

  # In case we're running under MSWindows, don't write with CRLF.
  # (This circumvents a bug in at least Cygwin bash where the shell
  # parsing fails on lines ending with the continuation character '\'
  # and CRLF).
  binmode $fh if $file =~ /^\s*>/;
}

=item C<$fh-E<gt>close>

Close the file, handling errors.

=cut

sub close
{
  my $fh = shift;
  if (!$fh->SUPER::close (@_))
    {
      my $file = $fh->name;
      Autom4te::FileUtils::handle_exec_errors $file
	unless $!;
      fatal "cannot close $file: $!";
    }
}

=item C<$line = $fh-E<gt>getline>

Read and return a line from the file.  Ensure C<\r\n> is translated to
C<\n> on input files.

=cut

# Some native Windows/perl installations fail to translate \r\n to \n on
# input so we do that here.
sub getline
{
  local $_ = $_[0]->SUPER::getline;
  # Perform a _global_ replacement: $_ may can contains many lines
  # in slurp mode ($/ = undef).
  s/\015\012/\n/gs if defined $_;
  return $_;
}

=item C<@lines = $fh-E<gt>getlines>

Slurp lines from the files.

=cut

sub getlines
{
  my @res = ();
  my $line;
  push @res, $line while $line = $_[0]->getline;
  return @res;
}

=item C<$name = $fh-E<gt>name>

Return the name of the file.

=cut

sub name
{
  my $fh = shift;
  return ${*$fh}{'autom4te_xfile_file'};
}

=item C<$fh-E<gt>lock>

Lock the file using C<flock>.  If locking fails for reasons other than
C<flock> being unsupported, then error out if C<$ENV{'MAKEFLAGS'}> indicates
that we are spawned from a parallel C<make>.

=cut

sub lock
{
  my ($fh, $mode) = @_;
  # Cannot use @_ here.

  # Unless explicitly configured otherwise, Perl implements its 'flock' with the
  # first of flock(2), fcntl(2), or lockf(3) that works.  These can fail on
  # NFS-backed files, with ENOLCK (GNU/Linux) or EOPNOTSUPP (FreeBSD); we
  # usually ignore these errors.  If $ENV{MAKEFLAGS} suggests that a parallel
  # invocation of 'make' has invoked the tool we serve, report all locking
  # failures and abort.
  #
  # On Unicos, flock(2) and fcntl(2) over NFS hang indefinitely when 'lockd' is
  # not running.  NetBSD NFS clients silently grant all locks.  We do not
  # attempt to defend against these dangers.
  #
  # -j is for parallel BSD make, -P is for parallel HP-UX make.
  if (!flock ($fh, $mode))
    {
      my $make_j = (exists $ENV{'MAKEFLAGS'}
		    && " -$ENV{'MAKEFLAGS'}" =~ / (-[BdeikrRsSw]*[jP]|--[jP]|---?jobs)/);
      my $note = "\nforgo \"make -j\" or use a file system that supports locks";
      my $file = $fh->name;

      msg ($make_j ? 'fatal' : 'unsupported',
	   "cannot lock $file with mode $mode: $!" . ($make_j ? $note : ""))
	if $make_j || !($!{ENOLCK} || $!{EOPNOTSUPP});
    }
}

=item C<$fh-E<gt>seek ($position, [$whence])>

Seek file to C<$position>.  Die if seeking fails.

=cut

sub seek
{
  my $fh = shift;
  # Cannot use @_ here.
  if (!seek ($fh, $_[0], $_[1]))
    {
      my $file = $fh->name;
      fatal "cannot rewind $file with @_: $!";
    }
}

=item C<$fh-E<gt>truncate ($len)>

Truncate the file to length C<$len>.  Die on failure.

=cut

sub truncate
{
  my ($fh, $len) = @_;
  if (!truncate ($fh, $len))
    {
      my $file = $fh->name;
      fatal "cannot truncate $file at $len: $!";
    }
}

=back

=head1 SEE ALSO

L<perlfunc>,
L<perlop/"I/O Operators">,
L<IO::File>
L<IO::Handle>
L<IO::Seekable>

=head1 HISTORY

Derived from IO::File.pm by Akim Demaille E<lt>F<akim@freefriends.org>E<gt>.

=cut

1;

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
PK     ³4]dMÕ1  1    C4che.pmnu „[µü¤        # autoconf -- create `configure' using m4 macros
# Copyright (C) 2003, 2006, 2009-2012 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

package Autom4te::C4che;

=head1 NAME

Autom4te::C4che - a single m4 run request

=head1 SYNOPSIS

  use Autom4te::C4che;

=head1 DESCRIPTION

This Perl module handles the cache of M4 runs used by autom4te.

=cut

use Data::Dumper;
use Autom4te::Request;
use Carp;
use strict;

=over 4

=item @request

List of requests.

We cannot declare it "my" as the loading, performed via "do", would
refer to another scope, and @request would not be updated.  It used to
work with "my" vars, and I do not know whether the current behavior
(5.6) is wanted or not.

=cut

use vars qw(@request);

=item C<$req = Autom4te::C4che-E<gt>retrieve (%attr)>

Find a request with the same path and input.

=cut

sub retrieve($%)
{
  my ($self, %attr) = @_;

  foreach (@request)
    {
      # Same path.
      next
	if join ("\n", @{$_->path}) ne join ("\n", @{$attr{path}});

      # Same inputs.
      next
	if join ("\n", @{$_->input}) ne join ("\n", @{$attr{input}});

      # Found it.
      return $_;
    }

  return undef;
}

=item C<$req = Autom4te::C4che-E<gt>register (%attr)>

Create and register a request for these path and input.

=cut

# $REQUEST-OBJ
# register ($SELF, %ATTR)
# -----------------------
# NEW should not be called directly.
# Private.
sub register ($%)
{
  my ($self, %attr) = @_;

  # path and input are the only ID for a request object.
  my $obj = new Autom4te::Request ('path'  => $attr{path},
				   'input' => $attr{input});
  push @request, $obj;

  # Assign an id for cache file.
  $obj->id ("$#request");

  return $obj;
}


=item C<$req = Autom4te::C4che-E<gt>request (%request)>

Get (retrieve or create) a request for the path C<$request{path}> and
the input C<$request{input}>.

=cut

# $REQUEST-OBJ
# request($SELF, %REQUEST)
# ------------------------
sub request ($%)
{
  my ($self, %request) = @_;

  my $req =
    Autom4te::C4che->retrieve (%request)
    || Autom4te::C4che->register (%request);

  # If there are new traces to produce, then we are not valid.
  foreach (@{$request{'macro'}})
    {
      if (! exists ${$req->macro}{$_})
	{
	  ${$req->macro}{$_} = 1;
	  $req->valid (0);
	}
    }

  # It would be great to have $REQ check that it is up to date wrt
  # its dependencies, but that requires getting traces (to fetch the
  # included files), which is out of the scope of Request (currently?).

  return $req;
}


=item C<$string = Autom4te::C4che-E<gt>marshall ()>

Serialize all the current requests.

=cut


# marshall($SELF)
# ---------------
sub marshall ($)
{
  my ($caller) = @_;
  my $res = '';

  my $marshall = Data::Dumper->new ([\@request], [qw (*request)]);
  $marshall->Indent(2)->Terse(0);
  $res = $marshall->Dump . "\n";

  return $res;
}


=item C<Autom4te::C4che-E<gt>save ($file)>

Save the cache in the C<$file> file object.

=cut

# SAVE ($FILE)
# ------------
sub save ($$)
{
  my ($self, $file) = @_;

  confess "cannot save a single request\n"
    if ref ($self);

  $file->seek (0, 0);
  $file->truncate (0);
  print $file
    "# This file was generated.\n",
    "# It contains the lists of macros which have been traced.\n",
    "# It can be safely removed.\n",
    "\n",
    $self->marshall;
}


=item C<Autom4te::C4che-E<gt>load ($file)>

Load the cache from the C<$file> file object.

=cut

# LOAD ($FILE)
# ------------
sub load ($$)
{
  my ($self, $file) = @_;
  my $fname = $file->name;

  confess "cannot load a single request\n"
    if ref ($self);

  my $contents = join "", $file->getlines;

  eval $contents;

  confess "cannot eval $fname: $@\n" if $@;
}


=head1 SEE ALSO

L<Autom4te::Request>

=head1 HISTORY

Written by Akim Demaille E<lt>F<akim@freefriends.org>E<gt>.

=cut

1; # for require

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
PK     ³4]¸Ñ#  #  
  General.pmnu „[µü¤        # autoconf -- create `configure' using m4 macros
# Copyright (C) 2001-2004, 2006-2007, 2009-2012 Free Software
# Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

package Autom4te::General;

=head1 NAME

Autom4te::General - general support functions for Autoconf

=head1 SYNOPSIS

  use Autom4te::General

=head1 DESCRIPTION

This perl module provides various general purpose support functions
used in several executables of the Autoconf package.

=cut

use 5.006;
use Exporter;
use Autom4te::ChannelDefs;
use Autom4te::Channels;
use Autom4te::Getopt ();
use File::Basename;
use File::Path ();
use File::stat;
use IO::File;
use Carp;
use strict;

use vars qw (@ISA @EXPORT);

@ISA = qw (Exporter);

# Variables we define and export.
my @export_vars =
  qw ($debug $force $help $me $tmp $verbose $version);

# Functions we define and export.
my @export_subs =
  qw (&debug
      &getopt &shell_quote &mktmpdir
      &uniq);

# Functions we forward (coming from modules we use).
my @export_forward_subs =
  qw (&basename &dirname &fileparse);

@EXPORT = (@export_vars, @export_subs, @export_forward_subs);


# Variable we share with the main package.  Be sure to have a single
# copy of them: using `my' together with multiple inclusion of this
# package would introduce several copies.

=head2 Global Variables

=over 4

=item C<$debug>

Set this variable to 1 if debug messages should be enabled.  Debug
messages are meant for developers only, or when tracking down an
incorrect execution.

=cut

use vars qw ($debug);
$debug = 0;

=item C<$force>

Set this variable to 1 to recreate all the files, or to consider all
the output files are obsolete.

=cut

use vars qw ($force);
$force = undef;

=item C<$help>

Set to the help message associated with the option C<--help>.

=cut

use vars qw ($help);
$help = undef;

=item C<$me>

The name of this application, for diagnostic messages.

=cut

use vars qw ($me);
$me = basename ($0);

=item C<$tmp>

The name of the temporary directory created by C<mktmpdir>.  Left
C<undef> otherwise.

=cut

# Our tmp dir.
use vars qw ($tmp);
$tmp = undef;

=item C<$verbose>

Enable verbosity messages.  These messages are meant for ordinary
users, and typically make explicit the steps being performed.

=cut

use vars qw ($verbose);
$verbose = 0;

=item C<$version>

Set to the version message associated to the option C<--version>.

=cut

use vars qw ($version);
$version = undef;

=back

=cut


## ----- ##
## END.  ##
## ----- ##

=head2 Functions

=over 4

=item C<END>

Filter Perl's exit codes, delete any temporary directory (unless
C<$debug>), and exit nonzero whenever closing C<STDOUT> fails.

=cut

# END
# ---
sub END
{
  # $? contains the exit status we will return.
  # It was set using one of the following ways:
  #
  #  1) normal termination
  #     this sets $? = 0
  #  2) calling `exit (n)'
  #     this sets $? = n
  #  3) calling die or friends (croak, confess...):
  #     a) when $! is non-0
  #        this set $? = $!
  #     b) when $! is 0 but $? is not
  #        this sets $? = ($? >> 8)   (i.e., the exit code of the
  #        last program executed)
  #     c) when both $! and $? are 0
  #        this sets $? = 255
  #
  # Cases 1), 2), and 3b) are fine, but we prefer $? = 1 for 3a) and 3c).
  my $status = $?;
  $status = 1 if ($! && $! == $?) || $? == 255;
  # (Note that we cannot safely distinguish calls to `exit (n)'
  # from calls to die when `$! = n'.  It's not big deal because
  # we only call `exit (0)' or `exit (1)'.)

  if (!$debug && defined $tmp && -d $tmp)
    {
      local $SIG{__WARN__} = sub { $status = 1; warn $_[0] };
      File::Path::rmtree $tmp;
    }

  # This is required if the code might send any output to stdout
  # E.g., even --version or --help.  So it's best to do it unconditionally.
  if (! close STDOUT)
    {
      print STDERR "$me: closing standard output: $!\n";
      $? = 1;
      return;
    }

  $? = $status;
}


## ----------- ##
## Functions.  ##
## ----------- ##


=item C<debug (@message)>

If the debug mode is enabled (C<$debug> and C<$verbose>), report the
C<@message> on C<STDERR>, signed with the name of the program.

=cut

# &debug(@MESSAGE)
# ----------------
# Messages displayed only if $DEBUG and $VERBOSE.
sub debug (@)
{
  print STDERR "$me: ", @_, "\n"
    if $verbose && $debug;
}


=item C<getopt (%option)>

Wrapper around C<Autom4te::Getopt::parse_options>.  In addition to
the user C<option>s, support C<-h>/C<--help>, C<-V>/C<--version>,
C<-v>/C<--verbose>, C<-d>/C<--debug>, C<-f>/C<--force>.  Conform to
the GNU Coding Standards for error messages.

=cut

# getopt (%OPTION)
# ----------------
# Handle the %OPTION, plus all the common options.
sub getopt (%)
{
  my (%option) = @_;
  %option = ("h|help"     => sub { print $help; exit 0 },
	     "V|version"  => sub { print $version; exit 0 },

	     "v|verbose"  => sub { ++$verbose },
	     "d|debug"    => sub { ++$debug },
	     'f|force'    => \$force,

	     # User options last, so that they have precedence.
	     %option);
  Autom4te::Getopt::parse_options (%option);

  setup_channel 'note', silent => !$verbose;
  setup_channel 'verb', silent => !$verbose;
}


=item C<shell_quote ($file_name)>

Quote C<$file_name> for the shell.

=cut

# $FILE_NAME
# shell_quote ($FILE_NAME)
# ------------------------
# If the string $S is a well-behaved file name, simply return it.
# If it contains white space, quotes, etc., quote it, and return
# the new string.
sub shell_quote($)
{
  my ($s) = @_;
  if ($s =~ m![^\w+/.,-]!)
    {
      # Convert each single quote to '\''
      $s =~ s/\'/\'\\\'\'/g;
      # Then single quote the string.
      $s = "'$s'";
    }
  return $s;
}

=item C<mktmpdir ($signature)>

Create a temporary directory which name is based on C<$signature>.
Store its name in C<$tmp>.  C<END> is in charge of removing it, unless
C<$debug>.

=cut

# mktmpdir ($SIGNATURE)
# ---------------------
sub mktmpdir ($)
{
  my ($signature) = @_;
  my $TMPDIR = $ENV{'TMPDIR'} || '/tmp';
  my $quoted_tmpdir = shell_quote ($TMPDIR);

  # If mktemp supports dirs, use it.
  $tmp = `(umask 077 &&
	   mktemp -d $quoted_tmpdir/"${signature}XXXXXX") 2>/dev/null`;
  chomp $tmp;

  if (!$tmp || ! -d $tmp)
    {
      $tmp = "$TMPDIR/$signature" . int (rand 10000) . ".$$";
      mkdir $tmp, 0700
	or croak "$me: cannot create $tmp: $!\n";
    }

  print STDERR "$me:$$: working in $tmp\n"
    if $debug;
}


=item C<uniq (@list)>

Return C<@list> with no duplicates, keeping only the first
occurrences.

=cut

# @RES
# uniq (@LIST)
# ------------
sub uniq (@)
{
  my @res = ();
  my %seen = ();
  foreach my $item (@_)
    {
      if (! exists $seen{$item})
	{
	  $seen{$item} = 1;
	  push (@res, $item);
	}
    }
  return wantarray ? @res : "@res";
}


=item C<handle_exec_errors ($command)>

Display an error message for C<$command>, based on the content of
C<$?> and C<$!>.

=cut


# handle_exec_errors ($COMMAND)
# -----------------------------
sub handle_exec_errors ($)
{
  my ($command) = @_;

  $command = (split (' ', $command))[0];
  if ($!)
    {
      error "failed to run $command: $!";
    }
  else
    {
      use POSIX qw (WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG);

      if (WIFEXITED ($?))
	{
	  my $status = WEXITSTATUS ($?);
	  # WIFEXITED and WEXITSTATUS can alter $!, reset it so that
	  # error() actually propagates the command's exit status, not $!.
	  $! = 0;
	  error "$command failed with exit status: $status";
	}
      elsif (WIFSIGNALED ($?))
	{
	  my $signal = WTERMSIG ($?);
	  # In this case we prefer to exit with status 1.
	  $! = 1;
	  error "$command terminated by signal: $signal";
	}
      else
	{
	  error "$command exited abnormally";
	}
    }
}

=back

=head1 SEE ALSO

L<Autom4te::XFile>

=head1 HISTORY

Written by Alexandre Duret-Lutz E<lt>F<adl@gnu.org>E<gt> and Akim
Demaille E<lt>F<akim@freefriends.org>E<gt>.

=cut


1; # for require

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
PK     ³4]ñ!o'  o'    FileUtils.pmnu „[µü¤        # Copyright (C) 2003-2012 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

###############################################################
# The main copy of this file is in Automake's git repository. #
# Updates should be sent to automake-patches@gnu.org.         #
###############################################################

package Autom4te::FileUtils;

=head1 NAME

Autom4te::FileUtils - handling files

=head1 SYNOPSIS

  use Autom4te::FileUtils

=head1 DESCRIPTION

This perl module provides various general purpose file handling functions.

=cut

use 5.006;
use strict;
use Exporter;
use File::stat;
use IO::File;
use Autom4te::Channels;
use Autom4te::ChannelDefs;

use vars qw (@ISA @EXPORT);

@ISA = qw (Exporter);
@EXPORT = qw (&open_quote &contents
	      &find_file &mtime
	      &update_file &up_to_date_p
	      &xsystem &xsystem_hint &xqx
	      &dir_has_case_matching_file &reset_dir_cache
	      &set_dir_cache_file);


=item C<open_quote ($file_name)>

Quote C<$file_name> for open.

=cut

# $FILE_NAME
# open_quote ($FILE_NAME)
# -----------------------
# If the string $S is a well-behaved file name, simply return it.
# If it starts with white space, prepend './', if it ends with
# white space, add '\0'.  Return the new string.
sub open_quote($)
{
  my ($s) = @_;
  if ($s =~ m/^\s/)
    {
      $s = "./$s";
    }
  if ($s =~ m/\s$/)
    {
      $s = "$s\0";
    }
  return $s;
}

=item C<find_file ($file_name, @include)>

Return the first path for a C<$file_name> in the C<include>s.

We match exactly the behavior of GNU M4: first look in the current
directory (which includes the case of absolute file names), and then,
if the file name is not absolute, look in C<@include>.

If the file is flagged as optional (ends with C<?>), then return undef
if absent, otherwise exit with error.

=cut

# $FILE_NAME
# find_file ($FILE_NAME, @INCLUDE)
# --------------------------------
sub find_file ($@)
{
  use File::Spec;

  my ($file_name, @include) = @_;
  my $optional = 0;

  $optional = 1
    if $file_name =~ s/\?$//;

  return File::Spec->canonpath ($file_name)
    if -e $file_name;

  if (!File::Spec->file_name_is_absolute ($file_name))
    {
      foreach my $path (@include)
	{
	  return File::Spec->canonpath (File::Spec->catfile ($path, $file_name))
	    if -e File::Spec->catfile ($path, $file_name)
	}
    }

  fatal "$file_name: no such file or directory"
    unless $optional;
  return undef;
}

=item C<mtime ($file)>

Return the mtime of C<$file>.  Missing files, or C<-> standing for
C<STDIN> or C<STDOUT> are "obsolete", i.e., as old as possible.

=cut

# $MTIME
# MTIME ($FILE)
# -------------
sub mtime ($)
{
  my ($file) = @_;

  return 0
    if $file eq '-' || ! -f $file;

  my $stat = stat ($file)
    or fatal "cannot stat $file: $!";

  return $stat->mtime;
}


=item C<update_file ($from, $to, [$force])>

Rename C<$from> as C<$to>, preserving C<$to> timestamp if it has not
changed, unless C<$force> is true (defaults to false).  Recognize
C<$to> = C<-> standing for C<STDIN>.  C<$from> is always
removed/renamed.

=cut

# &update_file ($FROM, $TO; $FORCE)
# ---------------------------------
sub update_file ($$;$)
{
  my ($from, $to, $force) = @_;
  $force = 0
    unless defined $force;
  my $SIMPLE_BACKUP_SUFFIX = $ENV{'SIMPLE_BACKUP_SUFFIX'} || '~';
  use File::Compare;
  use File::Copy;

  if ($to eq '-')
    {
      my $in = new IO::File ("< " . open_quote ($from));
      my $out = new IO::File (">-");
      while ($_ = $in->getline)
	{
	  print $out $_;
	}
      $in->close;
      unlink ($from) || fatal "cannot remove $from: $!";
      return;
    }

  if (!$force && -f "$to" && compare ("$from", "$to") == 0)
    {
      # File didn't change, so don't update its mod time.
      msg 'note', "'$to' is unchanged";
      unlink ($from)
        or fatal "cannot remove $from: $!";
      return
    }

  if (-f "$to")
    {
      # Back up and install the new one.
      move ("$to",  "$to$SIMPLE_BACKUP_SUFFIX")
	or fatal "cannot backup $to: $!";
      move ("$from", "$to")
	or fatal "cannot rename $from as $to: $!";
      msg 'note', "'$to' is updated";
    }
  else
    {
      move ("$from", "$to")
	or fatal "cannot rename $from as $to: $!";
      msg 'note', "'$to' is created";
    }
}


=item C<up_to_date_p ($file, @dep)>

Is C<$file> more recent than C<@dep>?

=cut

# $BOOLEAN
# &up_to_date_p ($FILE, @DEP)
# ---------------------------
sub up_to_date_p ($@)
{
  my ($file, @dep) = @_;
  my $mtime = mtime ($file);

  foreach my $dep (@dep)
    {
      if ($mtime < mtime ($dep))
	{
	  verb "up_to_date ($file): outdated: $dep";
	  return 0;
	}
    }

  verb "up_to_date ($file): up to date";
  return 1;
}


=item C<handle_exec_errors ($command, [$expected_exit_code = 0], [$hint])>

Display an error message for C<$command>, based on the content of
C<$?> and C<$!>.  Be quiet if the command exited normally
with C<$expected_exit_code>.  If C<$hint> is given, display that as well
if the command failed to run at all.

=cut

sub handle_exec_errors ($;$$)
{
  my ($command, $expected, $hint) = @_;
  $expected = 0 unless defined $expected;
  if (defined $hint)
    {
      $hint = "\n" . $hint;
    }
  else
    {
      $hint = '';
    }

  $command = (split (' ', $command))[0];
  if ($!)
    {
      fatal "failed to run $command: $!" . $hint;
    }
  else
    {
      use POSIX qw (WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG);

      if (WIFEXITED ($?))
	{
	  my $status = WEXITSTATUS ($?);
	  # Propagate exit codes.
	  fatal ('',
		 "$command failed with exit status: $status",
		 exit_code => $status)
	    unless $status == $expected;
	}
      elsif (WIFSIGNALED ($?))
	{
	  my $signal = WTERMSIG ($?);
	  fatal "$command terminated by signal: $signal";
	}
      else
	{
	  fatal "$command exited abnormally";
	}
    }
}

=item C<xqx ($command)>

Same as C<qx> (but in scalar context), but fails on errors.

=cut

# xqx ($COMMAND)
# --------------
sub xqx ($)
{
  my ($command) = @_;

  verb "running: $command";

  $! = 0;
  my $res = `$command`;
  handle_exec_errors $command
    if $?;

  return $res;
}


=item C<xsystem (@argv)>

Same as C<system>, but fails on errors, and reports the C<@argv>
in verbose mode.

=cut

sub xsystem (@)
{
  my (@command) = @_;

  verb "running: @command";

  $! = 0;
  handle_exec_errors "@command"
    if system @command;
}


=item C<xsystem_hint ($msg, @argv)>

Same as C<xsystem>, but allows to pass a hint that will be displayed
in case the command failed to run at all.

=cut

sub xsystem_hint (@)
{
  my ($hint, @command) = @_;

  verb "running: @command";

  $! = 0;
  handle_exec_errors "@command", 0, $hint
    if system @command;
}


=item C<contents ($file_name)>

Return the contents of C<$file_name>.

=cut

# contents ($FILE_NAME)
# ---------------------
sub contents ($)
{
  my ($file) = @_;
  verb "reading $file";
  local $/;			# Turn on slurp-mode.
  my $f = new Autom4te::XFile "< " . open_quote ($file);
  my $contents = $f->getline;
  $f->close;
  return $contents;
}


=item C<dir_has_case_matching_file ($DIRNAME, $FILE_NAME)>

Return true iff $DIR contains a file name that matches $FILE_NAME case
insensitively.

We need to be cautious on case-insensitive case-preserving file
systems (e.g. Mac OS X's HFS+).  On such systems C<-f 'Foo'> and C<-f
'foO'> answer the same thing.  Hence if a package distributes its own
F<CHANGELOG> file, but has no F<ChangeLog> file, automake would still
try to distribute F<ChangeLog> (because it thinks it exists) in
addition to F<CHANGELOG>, although it is impossible for these two
files to be in the same directory (the two file names designate the
same file).

=cut

use vars '%_directory_cache';
sub dir_has_case_matching_file ($$)
{
  # Note that print File::Spec->case_tolerant returns 0 even on MacOS
  # X (with Perl v5.8.1-RC3 at least), so do not try to shortcut this
  # function using that.

  my ($dirname, $file_name) = @_;
  return 0 unless -f "$dirname/$file_name";

  # The file appears to exist, however it might be a mirage if the
  # system is case insensitive.  Let's browse the directory and check
  # whether the file is really in.  We maintain a cache of directories
  # so Automake doesn't spend all its time reading the same directory
  # again and again.
  if (!exists $_directory_cache{$dirname})
    {
      error "failed to open directory '$dirname'"
	unless opendir (DIR, $dirname);
      $_directory_cache{$dirname} = { map { $_ => 1 } readdir (DIR) };
      closedir (DIR);
    }
  return exists $_directory_cache{$dirname}{$file_name};
}

=item C<reset_dir_cache ($dirname)>

Clear C<dir_has_case_matching_file>'s cache for C<$dirname>.

=cut

sub reset_dir_cache ($)
{
  delete $_directory_cache{$_[0]};
}

=item C<set_dir_cache_file ($dirname, $file_name)>

State that C<$dirname> contains C<$file_name> now.

=cut

sub set_dir_cache_file ($$)
{
  my ($dirname, $file_name) = @_;
  $_directory_cache{$dirname}{$file_name} = 1
    if exists $_directory_cache{$dirname};
}

1; # for require

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
PK     ³4]/¾ h      Configure_ac.pmnu „[µü¤        # Copyright (C) 2003-2012 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

###############################################################
# The main copy of this file is in Automake's git repository. #
# Updates should be sent to automake-patches@gnu.org.         #
###############################################################

package Autom4te::Configure_ac;

use 5.006;
use strict;
use Exporter;
use Autom4te::Channels;
use Autom4te::ChannelDefs;

use vars qw (@ISA @EXPORT);

@ISA = qw (Exporter);
@EXPORT = qw (&find_configure_ac &require_configure_ac);

=head1 NAME

Autom4te::Configure_ac - Locate configure.ac or configure.in.

=head1 SYNOPSIS

  use Autom4te::Configure_ac;

  # Try to locate configure.in or configure.ac in the current
  # directory.  It may be absent.  Complain if both files exist.
  my $file_name = find_configure_ac;

  # Likewise, but bomb out if the file does not exist.
  my $file_name = require_configure_ac;

  # Likewise, but in $dir.
  my $file_name = find_configure_ac ($dir);
  my $file_name = require_configure_ac ($dir);

=over 4

=back

=head2 Functions

=over 4

=item C<$configure_ac = find_configure_ac ([$directory])>

Find a F<configure.ac> or F<configure.in> file in C<$directory>,
defaulting to the current directory.  Complain if both files are present.
Return the name of the file found, or the former if neither is present.

=cut

sub find_configure_ac (;@)
{
  my ($directory) = @_;
  $directory ||= '.';
  my $configure_ac =
    File::Spec->canonpath (File::Spec->catfile ($directory, 'configure.ac'));
  my $configure_in =
    File::Spec->canonpath (File::Spec->catfile ($directory, 'configure.in'));

  if (-f $configure_ac)
    {
      if (-f $configure_in)
	{
	  msg ('unsupported',
	       "'$configure_ac' and '$configure_in' both present.\n"
	       . "proceeding with '$configure_ac'");
	}
      return $configure_ac
    }
  elsif (-f $configure_in)
    {
      return $configure_in;
    }
  return $configure_ac;
}


=item C<$configure_ac = require_configure_ac ([$directory])>

Like C<find_configure_ac>, but fail if neither is present.

=cut

sub require_configure_ac (;$)
{
  my $res = find_configure_ac (@_);
  fatal "'configure.ac' or 'configure.in' is required"
    unless -f $res;
  return $res
}

1;

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
PK     ³4]9P}Ö#  Ö#    ChannelDefs.pmnu „[µü¤        # Copyright (C) 2002-2003, 2006, 2008-2012 Free Software Foundation,
# Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

package Autom4te::ChannelDefs;

use Autom4te::Channels;

=head1 NAME

Autom4te::ChannelDefs - channel definitions for Automake and helper functions

=head1 SYNOPSIS

  use Autom4te::ChannelDefs;

  print Autom4te::ChannelDefs::usage (), "\n";
  prog_error ($MESSAGE, [%OPTIONS]);
  error ($WHERE, $MESSAGE, [%OPTIONS]);
  error ($MESSAGE);
  fatal ($WHERE, $MESSAGE, [%OPTIONS]);
  fatal ($MESSAGE);
  verb ($MESSAGE, [%OPTIONS]);
  switch_warning ($CATEGORY);
  parse_WARNINGS ();
  parse_warnings ($OPTION, @ARGUMENT);
  Autom4te::ChannelDefs::set_strictness ($STRICTNESS_NAME);

=head1 DESCRIPTION

This package defines channels that can be used in Automake to
output diagnostics and other messages (via C<msg()>).  It also defines
some helper function to enable or disable these channels, and some
shorthand function to output on specific channels.

=cut

use 5.006;
use strict;
use Exporter;

use vars qw (@ISA @EXPORT);

@ISA = qw (Exporter);
@EXPORT = qw (&prog_error &error &fatal &verb
	      &switch_warning &parse_WARNINGS &parse_warnings);

=head2 CHANNELS

The following channels can be used as the first argument of
C<Autom4te::Channel::msg>.  For some of them we list a shorthand
function that makes the code more readable.

=over 4

=item C<fatal>

Fatal errors.  Use C<&fatal> to send messages over this channel.

=item C<error>

Common errors.  Use C<&error> to send messages over this channel.

=item C<error-gnu>

Errors related to GNU Standards.

=item C<error-gnu/warn>

Errors related to GNU Standards that should be warnings in "foreign" mode.

=item C<error-gnits>

Errors related to GNITS Standards (silent by default).

=item C<automake>

Internal errors.  Use C<&prog_error> to send messages over this channel.

=item C<cross>

Constructs compromising the cross-compilation of the package.

=item C<gnu>

Warnings related to GNU Coding Standards.

=item C<obsolete>

Warnings about obsolete features (silent by default).

=item C<override>

Warnings about user redefinitions of Automake rules or
variables (silent by default).

=item C<portability>

Warnings about non-portable constructs.

=item C<syntax>

Warnings about weird syntax, unused variables, typos ...

=item C<unsupported>

Warnings about unsupported (or mis-supported) features.

=item C<verb>

Messages output in C<--verbose> mode.  Use C<&verb> to send such messages.

=item C<note>

Informative messages.

=back

=cut

# Initialize our list of error/warning channels.
# Do not forget to update &usage and the manual
# if you add or change a warning channel.

register_channel 'fatal', type => 'fatal', ordered => 0;
register_channel 'error', type => 'error';
register_channel 'error-gnu', type => 'error';
register_channel 'error-gnu/warn', type => 'error';
register_channel 'error-gnits', type => 'error', silent => 1;
register_channel 'automake', type => 'fatal', backtrace => 1,
  header => ("####################\n" .
	     "## Internal Error ##\n" .
	     "####################\n"),
  footer => "\nPlease contact <bug-automake\@gnu.org>.",
  ordered => 0;

register_channel 'cross', type => 'warning', silent => 1;
register_channel 'gnu', type => 'warning';
register_channel 'obsolete', type => 'warning', silent => 1;
register_channel 'override', type => 'warning', silent => 1;
register_channel 'portability', type => 'warning', silent => 1;
register_channel 'syntax', type => 'warning';
register_channel 'unsupported', type => 'warning';

register_channel 'verb', type => 'debug', silent => 1, ordered => 0;
register_channel 'note', type => 'debug', silent => 0;

=head2 FUNCTIONS

=over 4

=item C<usage ()>

Return the warning category descriptions.

=cut

sub usage ()
{
  return "Warning categories include:
  `cross'         cross compilation issues
  `gnu'           GNU coding standards (default in gnu and gnits modes)
  `obsolete'      obsolete features or constructions
  `override'      user redefinitions of Automake rules or variables
  `portability'   portability issues (default in gnu and gnits modes)
  `syntax'        dubious syntactic constructs (default)
  `unsupported'   unsupported or incomplete features (default)
  `all'           all the warnings
  `no-CATEGORY'   turn off warnings in CATEGORY
  `none'          turn off all the warnings
  `error'         treat warnings as errors";
}

=item C<prog_error ($MESSAGE, [%OPTIONS])>

Signal a programming error (on channel C<automake>),
display C<$MESSAGE>, and exit 1.

=cut

sub prog_error ($;%)
{
  my ($msg, %opts) = @_;
  msg 'automake', '', $msg, %opts;
}

=item C<error ($WHERE, $MESSAGE, [%OPTIONS])>

=item C<error ($MESSAGE)>

Uncategorized errors.

=cut

sub error ($;$%)
{
  my ($where, $msg, %opts) = @_;
  msg ('error', $where, $msg, %opts);
}

=item C<fatal ($WHERE, $MESSAGE, [%OPTIONS])>

=item C<fatal ($MESSAGE)>

Fatal errors.

=cut

sub fatal ($;$%)
{
  my ($where, $msg, %opts) = @_;
  msg ('fatal', $where, $msg, %opts);
}

=item C<verb ($MESSAGE, [%OPTIONS])>

C<--verbose> messages.

=cut

sub verb ($;%)
{
  my ($msg, %opts) = @_;
  msg 'verb', '', $msg, %opts;
}

=item C<switch_warning ($CATEGORY)>

If C<$CATEGORY> is C<mumble>, turn on channel C<mumble>.
If it is C<no-mumble>, turn C<mumble> off.
Else handle C<all> and C<none> for completeness.

=cut

sub switch_warning ($)
{
  my ($cat) = @_;
  my $has_no = 0;

  if ($cat =~ /^no-(.*)$/)
    {
      $cat = $1;
      $has_no = 1;
    }

  if ($cat eq 'all')
    {
      setup_channel_type 'warning', silent => $has_no;
    }
  elsif ($cat eq 'none')
    {
      setup_channel_type 'warning', silent => ! $has_no;
    }
  elsif ($cat eq 'error')
    {
      $warnings_are_errors = ! $has_no;
      # Set exit code if Perl warns about something
      # (like uninitialized variables).
      $SIG{"__WARN__"} =
	$has_no ? 'DEFAULT' : sub { print STDERR @_; $exit_code = 1; };
    }
  elsif (channel_type ($cat) eq 'warning')
    {
      setup_channel $cat, silent => $has_no;
    }
  else
    {
      return 1;
    }
  return 0;
}

=item C<parse_WARNINGS ()>

Parse the WARNINGS environment variable.

=cut

sub parse_WARNINGS ()
{
  if (exists $ENV{'WARNINGS'})
    {
      # Ignore unknown categories.  This is required because WARNINGS
      # should be honored by many tools.
      switch_warning $_ foreach (split (',', $ENV{'WARNINGS'}));
    }
}

=item C<parse_warnings ($OPTION, @ARGUMENT)>

Parse the argument of C<--warning=CATEGORY> or C<-WCATEGORY>.

C<$OPTIONS> is C<"--warning"> or C<"-W">, C<@ARGUMENT> is a list of
C<CATEGORY>.

This can be used as an argument to C<Getopt>.

=cut

sub parse_warnings ($@)
{
  my ($opt, @categories) = @_;

  foreach my $cat (map { split ',' } @categories)
    {
      msg 'unsupported', "unknown warning category `$cat'"
	if switch_warning $cat;
    }
}

=item C<set_strictness ($STRICTNESS_NAME)>

Configure channels for strictness C<$STRICTNESS_NAME>.

=cut

sub set_strictness ($)
{
  my ($name) = @_;

  if ($name eq 'gnu')
    {
      setup_channel 'error-gnu', silent => 0;
      setup_channel 'error-gnu/warn', silent => 0, type => 'error';
      setup_channel 'error-gnits', silent => 1;
      setup_channel 'portability', silent => 0;
      setup_channel 'gnu', silent => 0;
    }
  elsif ($name eq 'gnits')
    {
      setup_channel 'error-gnu', silent => 0;
      setup_channel 'error-gnu/warn', silent => 0, type => 'error';
      setup_channel 'error-gnits', silent => 0;
      setup_channel 'portability', silent => 0;
      setup_channel 'gnu', silent => 0;
    }
  elsif ($name eq 'foreign')
    {
      setup_channel 'error-gnu', silent => 1;
      setup_channel 'error-gnu/warn', silent => 0, type => 'warning';
      setup_channel 'error-gnits', silent => 1;
      setup_channel 'portability', silent => 1;
      setup_channel 'gnu', silent => 1;
    }
  else
    {
      prog_error "level `$name' not recognized\n";
    }
}

=back

=head1 SEE ALSO

L<Autom4te::Channels>

=head1 HISTORY

Written by Alexandre Duret-Lutz E<lt>F<adl@gnu.org>E<gt>.

=cut

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
PK     ³4]ƒ½%ÖÛQ  ÛQ    Channels.pmnu „[µü¤        # Copyright (C) 2002-2012 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

###############################################################
# The main copy of this file is in Automake's git repository. #
# Updates should be sent to automake-patches@gnu.org.         #
###############################################################

package Autom4te::Channels;

=head1 NAME

Autom4te::Channels - support functions for error and warning management

=head1 SYNOPSIS

  use Autom4te::Channels;

  # Register a channel to output warnings about unused variables.
  register_channel 'unused', type => 'warning';

  # Register a channel for system errors.
  register_channel 'system', type => 'error', exit_code => 4;

  # Output a message on channel 'unused'.
  msg 'unused', "$file:$line", "unused variable '$var'";

  # Make the 'unused' channel silent.
  setup_channel 'unused', silent => 1;

  # Turn on all channels of type 'warning'.
  setup_channel_type 'warning', silent => 0;

  # Redirect all channels to push messages on a Thread::Queue using
  # the specified serialization key.
  setup_channel_queue $queue, $key;

  # Output a message pending in a Thread::Queue.
  pop_channel_queue $queue;

  # Treat all warnings as errors.
  $warnings_are_errors = 1;

  # Exit with the greatest exit code encountered so far.
  exit $exit_code;

=head1 DESCRIPTION

This perl module provides support functions for handling diagnostic
channels in programs.  Channels can be registered to convey fatal,
error, warning, or debug messages.  Each channel has various options
(e.g. is the channel silent, should duplicate messages be removed,
etc.) that can also be overridden on a per-message basis.

=cut

use 5.006;
use strict;
use Exporter;
use Carp;
use File::Basename;

use vars qw (@ISA @EXPORT %channels $me);

@ISA = qw (Exporter);
@EXPORT = qw ($exit_code $warnings_are_errors
	      &reset_local_duplicates &reset_global_duplicates
	      &register_channel &msg &exists_channel &channel_type
	      &setup_channel &setup_channel_type
	      &dup_channel_setup &drop_channel_setup
	      &buffer_messages &flush_messages
	      &setup_channel_queue &pop_channel_queue
	      US_GLOBAL US_LOCAL
	      UP_NONE UP_TEXT UP_LOC_TEXT);

$me = basename $0;

=head2 Global Variables

=over 4

=item C<$exit_code>

The greatest exit code seen so far. C<$exit_code> is updated from
the C<exit_code> options of C<fatal> and C<error> channels.

=cut

use vars qw ($exit_code);
$exit_code = 0;

=item C<$warnings_are_errors>

Set this variable to 1 if warning messages should be treated as
errors (i.e. if they should update C<$exit_code>).

=cut

use vars qw ($warnings_are_errors);
$warnings_are_errors = 0;

=back

=head2 Constants

=over 4

=item C<UP_NONE>, C<UP_TEXT>, C<UP_LOC_TEXT>

Possible values for the C<uniq_part> options.  This selects the part
of the message that should be considered when filtering out duplicates.
If C<UP_LOC_TEXT> is used, the location and the explanation message
are used for filtering.  If C<UP_TEXT> is used, only the explanation
message is used (so the same message will be filtered out if it appears
at different locations).  C<UP_NONE> means that duplicate messages
should be output.

=cut

use constant UP_NONE => 0;
use constant UP_TEXT => 1;
use constant UP_LOC_TEXT => 2;

=item C<US_LOCAL>, C<US_GLOBAL>

Possible values for the C<uniq_scope> options.
Use C<US_GLOBAL> for error messages that should be printed only
once during the execution of the program, C<US_LOCAL> for message that
should be printed only once per file.  (Actually, C<Channels> does not
do this now when files are changed, it relies on you calling
C<reset_local_duplicates> when this happens.)

=cut

# possible values for uniq_scope
use constant US_LOCAL => 0;
use constant US_GLOBAL => 1;

=back

=head2 Options

Channels accept the options described below.  These options can be
passed as a hash to the C<register_channel>, C<setup_channel>, and C<msg>
functions.  The possible keys, with their default value are:

=over

=item C<type =E<gt> 'warning'>

The type of the channel.  One of C<'debug'>, C<'warning'>, C<'error'>, or
C<'fatal'>.  Fatal messages abort the program when they are output.
Error messages update the exit status.  Debug and warning messages are
harmless, except that warnings are treated as errors if
C<$warnings_are_errors> is set.

=item C<exit_code =E<gt> 1>

The value to update C<$exit_code> with when a fatal or error message
is emitted.  C<$exit_code> is also updated for warnings output
when C<$warnings_are_errors> is set.

=item C<file =E<gt> \*STDERR>

The file where the error should be output.

=item C<silent =E<gt> 0>

Whether the channel should be silent.  Use this do disable a
category of warning, for instance.

=item C<ordered =E<gt> 1>

Whether, with multi-threaded execution, the message should be queued
for ordered output.

=item C<uniq_part =E<gt> UP_LOC_TEXT>

The part of the message subject to duplicate filtering.  See the
documentation for the C<UP_NONE>, C<UP_TEXT>, and C<UP_LOC_TEXT>
constants above.

C<uniq_part> can also be set to an arbitrary string that will be used
instead of the message when considering duplicates.

=item C<uniq_scope =E<gt> US_LOCAL>

The scope of duplicate filtering.  See the documentation for the
C<US_LOCAL>, and C<US_GLOBAL> constants above.

=item C<header =E<gt> ''>

A string to prepend to each message emitted through this channel.
With partial messages, only the first part will have C<header>
prepended.

=item C<footer =E<gt> ''>

A string to append to each message emitted through this channel.
With partial messages, only the final part will have C<footer>
appended.

=item C<backtrace =E<gt> 0>

Die with a stack backtrace after displaying the message.

=item C<partial =E<gt> 0>

When set, indicates a partial message that should
be output along with the next message with C<partial> unset.
Several partial messages can be stacked this way.

Duplicate filtering will apply to the I<global> message resulting from
all I<partial> messages, using the options from the last (non-partial)
message.  Linking associated messages is the main reason to use this
option.

For instance the following messages

  msg 'channel', 'foo:2', 'redefinition of A ...';
  msg 'channel', 'foo:1', '... A previously defined here';
  msg 'channel', 'foo:3', 'redefinition of A ...';
  msg 'channel', 'foo:1', '... A previously defined here';

will result in

 foo:2: redefinition of A ...
 foo:1: ... A previously defined here
 foo:3: redefinition of A ...

where the duplicate "I<... A previously defined here>" has been
filtered out.

Linking these messages using C<partial> as follows will prevent the
fourth message to disappear.

  msg 'channel', 'foo:2', 'redefinition of A ...', partial => 1;
  msg 'channel', 'foo:1', '... A previously defined here';
  msg 'channel', 'foo:3', 'redefinition of A ...', partial => 1;
  msg 'channel', 'foo:1', '... A previously defined here';

Note that because the stack of C<partial> messages is printed with the
first non-C<partial> message, most options of C<partial> messages will
be ignored.

=back

=cut

use vars qw (%_default_options %_global_duplicate_messages
	     %_local_duplicate_messages);

# Default options for a channel.
%_default_options =
  (
   type => 'warning',
   exit_code => 1,
   file => \*STDERR,
   silent => 0,
   ordered => 1,
   queue => 0,
   queue_key => undef,
   uniq_scope => US_LOCAL,
   uniq_part => UP_LOC_TEXT,
   header => '',
   footer => '',
   backtrace => 0,
   partial => 0,
   );

# Filled with output messages as keys, to detect duplicates.
# The value associated with each key is the number of occurrences
# filtered out.
%_local_duplicate_messages = ();
%_global_duplicate_messages = ();

sub _reset_duplicates (\%)
{
  my ($ref) = @_;
  my $dup = 0;
  foreach my $k (keys %$ref)
    {
      $dup += $ref->{$k};
    }
  %$ref = ();
  return $dup;
}


=head2 Functions

=over 4

=item C<reset_local_duplicates ()>

Reset local duplicate messages (see C<US_LOCAL>), and
return the number of messages that have been filtered out.

=cut

sub reset_local_duplicates ()
{
  return _reset_duplicates %_local_duplicate_messages;
}

=item C<reset_global_duplicates ()>

Reset local duplicate messages (see C<US_GLOBAL>), and
return the number of messages that have been filtered out.

=cut

sub reset_global_duplicates ()
{
  return _reset_duplicates %_global_duplicate_messages;
}

sub _merge_options (\%%)
{
  my ($hash, %options) = @_;
  local $_;

  foreach (keys %options)
    {
      if (exists $hash->{$_})
	{
	  $hash->{$_} = $options{$_}
	}
      else
	{
	  confess "unknown option '$_'";
	}
    }
  if ($hash->{'ordered'})
    {
      confess "fatal messages cannot be ordered"
	if $hash->{'type'} eq 'fatal';
      confess "backtrace cannot be output on ordered messages"
	if $hash->{'backtrace'};
    }
}

=item C<register_channel ($name, [%options])>

Declare channel C<$name>, and override the default options
with those listed in C<%options>.

=cut

sub register_channel ($;%)
{
  my ($name, %options) = @_;
  my %channel_opts = %_default_options;
  _merge_options %channel_opts, %options;
  $channels{$name} = \%channel_opts;
}

=item C<exists_channel ($name)>

Returns true iff channel C<$name> has been registered.

=cut

sub exists_channel ($)
{
  my ($name) = @_;
  return exists $channels{$name};
}

=item C<channel_type ($name)>

Returns the type of channel C<$name> if it has been registered.
Returns the empty string otherwise.

=cut

sub channel_type ($)
{
  my ($name) = @_;
  return $channels{$name}{'type'} if exists_channel $name;
  return '';
}

# _format_sub_message ($LEADER, $MESSAGE)
# ---------------------------------------
# Split $MESSAGE at new lines and add $LEADER to each line.
sub _format_sub_message ($$)
{
  my ($leader, $message) = @_;
  return $leader . join ("\n" . $leader, split ("\n", $message)) . "\n";
}

# Store partial messages here. (See the 'partial' option.)
use vars qw ($partial);
$partial = '';

# _format_message ($LOCATION, $MESSAGE, %OPTIONS)
# -----------------------------------------------
# Format the message.  Return a string ready to print.
sub _format_message ($$%)
{
  my ($location, $message, %opts) = @_;
  my $msg = ($partial eq '' ? $opts{'header'} : '') . $message
	    . ($opts{'partial'} ? '' : $opts{'footer'});
  if (ref $location)
    {
      # If $LOCATION is a reference, assume it's an instance of the
      # Autom4te::Location class and display contexts.
      my $loc = $location->get || $me;
      $msg = _format_sub_message ("$loc: ", $msg);
      for my $pair ($location->get_contexts)
	{
	  $msg .= _format_sub_message ($pair->[0] . ":   ", $pair->[1]);
	}
    }
  else
    {
      $location ||= $me;
      $msg = _format_sub_message ("$location: ", $msg);
    }
  return $msg;
}

# _enqueue ($QUEUE, $KEY, $UNIQ_SCOPE, $TO_FILTER, $MSG, $FILE)
# -------------------------------------------------------------
# Push message on a queue, to be processed by another thread.
sub _enqueue ($$$$$$)
{
  my ($queue, $key, $uniq_scope, $to_filter, $msg, $file) = @_;
  $queue->enqueue ($key, $msg, $to_filter, $uniq_scope);
  confess "message queuing works only for STDERR"
    if $file ne \*STDERR;
}

# _dequeue ($QUEUE)
# -----------------
# Pop a message from a queue, and print, similarly to how
# _print_message would do it.  Return 0 if the queue is
# empty.  Note that the key has already been dequeued.
sub _dequeue ($)
{
  my ($queue) = @_;
  my $msg = $queue->dequeue || return 0;
  my $to_filter = $queue->dequeue;
  my $uniq_scope = $queue->dequeue;
  my $file = \*STDERR;

  if ($to_filter ne '')
    {
      # Do we want local or global uniqueness?
      my $dups;
      if ($uniq_scope == US_LOCAL)
	{
	  $dups = \%_local_duplicate_messages;
	}
      elsif ($uniq_scope == US_GLOBAL)
	{
	  $dups = \%_global_duplicate_messages;
	}
      else
	{
	  confess "unknown value for uniq_scope: " . $uniq_scope;
	}

      # Update the hash of messages.
      if (exists $dups->{$to_filter})
	{
	  ++$dups->{$to_filter};
	  return 1;
	}
      else
	{
	  $dups->{$to_filter} = 0;
	}
    }
  print $file $msg;
  return 1;
}


# _print_message ($LOCATION, $MESSAGE, %OPTIONS)
# ----------------------------------------------
# Format the message, check duplicates, and print it.
sub _print_message ($$%)
{
  my ($location, $message, %opts) = @_;

  return 0 if ($opts{'silent'});

  my $msg = _format_message ($location, $message, %opts);
  if ($opts{'partial'})
    {
      # Incomplete message.  Store, don't print.
      $partial .= $msg;
      return;
    }
  else
    {
      # Prefix with any partial message send so far.
      $msg = $partial . $msg;
      $partial = '';
    }

  msg ('note', '', 'warnings are treated as errors', uniq_scope => US_GLOBAL)
    if ($opts{'type'} eq 'warning' && $warnings_are_errors);

  # Check for duplicate message if requested.
  my $to_filter;
  if ($opts{'uniq_part'} ne UP_NONE)
    {
      # Which part of the error should we match?
      if ($opts{'uniq_part'} eq UP_TEXT)
	{
	  $to_filter = $message;
	}
      elsif ($opts{'uniq_part'} eq UP_LOC_TEXT)
	{
	  $to_filter = $msg;
	}
      else
	{
	  $to_filter = $opts{'uniq_part'};
	}

      # Do we want local or global uniqueness?
      my $dups;
      if ($opts{'uniq_scope'} == US_LOCAL)
	{
	  $dups = \%_local_duplicate_messages;
	}
      elsif ($opts{'uniq_scope'} == US_GLOBAL)
	{
	  $dups = \%_global_duplicate_messages;
	}
      else
	{
	  confess "unknown value for uniq_scope: " . $opts{'uniq_scope'};
	}

      # Update the hash of messages.
      if (exists $dups->{$to_filter})
	{
	  ++$dups->{$to_filter};
	  return 0;
	}
      else
	{
	  $dups->{$to_filter} = 0;
	}
    }
  my $file = $opts{'file'};
  if ($opts{'ordered'} && $opts{'queue'})
    {
      _enqueue ($opts{'queue'}, $opts{'queue_key'}, $opts{'uniq_scope'},
		$to_filter, $msg, $file);
    }
  else
    {
      print $file $msg;
    }
  return 1;
}

=item C<msg ($channel, $location, $message, [%options])>

Emit a message on C<$channel>, overriding some options of the channel with
those specified in C<%options>.  Obviously C<$channel> must have been
registered with C<register_channel>.

C<$message> is the text of the message, and C<$location> is a location
associated to the message.

For instance to complain about some unused variable C<mumble>
declared at line 10 in F<foo.c>, one could do:

  msg 'unused', 'foo.c:10', "unused variable 'mumble'";

If channel C<unused> is not silent (and if this message is not a duplicate),
the following would be output:

  foo.c:10: unused variable 'mumble'

C<$location> can also be an instance of C<Autom4te::Location>.  In this
case, the stack of contexts will be displayed in addition.

If C<$message> contains newline characters, C<$location> is prepended
to each line.  For instance,

  msg 'error', 'somewhere', "1st line\n2nd line";

becomes

  somewhere: 1st line
  somewhere: 2nd line

If C<$location> is an empty string, it is replaced by the name of the
program.  Actually, if you don't use C<%options>, you can even
elide the empty C<$location>.  Thus

  msg 'fatal', '', 'fatal error';
  msg 'fatal', 'fatal error';

both print

  progname: fatal error

=cut


use vars qw (@backlog %buffering);

# See buffer_messages() and flush_messages() below.
%buffering = ();	# The map of channel types to buffer.
@backlog = ();		# The buffer of messages.

sub msg ($$;$%)
{
  my ($channel, $location, $message, %options) = @_;

  if (! defined $message)
    {
      $message = $location;
      $location = '';
    }

  confess "unknown channel $channel" unless exists $channels{$channel};

  my %opts = %{$channels{$channel}};
  _merge_options (%opts, %options);

  if (exists $buffering{$opts{'type'}})
    {
      push @backlog, [$channel, $location->clone, $message, %options];
      return;
    }

  # Print the message if needed.
  if (_print_message ($location, $message, %opts))
    {
      # Adjust exit status.
      if ($opts{'type'} eq 'error'
	  || $opts{'type'} eq 'fatal'
	  || ($opts{'type'} eq 'warning' && $warnings_are_errors))
	{
	  my $es = $opts{'exit_code'};
	  $exit_code = $es if $es > $exit_code;
	}

      # Die on fatal messages.
      confess if $opts{'backtrace'};
      if ($opts{'type'} eq 'fatal')
        {
	  # flush messages explicitly here, needed in worker threads.
	  STDERR->flush;
	  exit $exit_code;
	}
    }
}


=item C<setup_channel ($channel, %options)>

Override the options of C<$channel> with those specified by C<%options>.

=cut

sub setup_channel ($%)
{
  my ($name, %opts) = @_;
  confess "unknown channel $name" unless exists $channels{$name};
  _merge_options %{$channels{$name}}, %opts;
}

=item C<setup_channel_type ($type, %options)>

Override the options of any channel of type C<$type>
with those specified by C<%options>.

=cut

sub setup_channel_type ($%)
{
  my ($type, %opts) = @_;
  foreach my $channel (keys %channels)
    {
      setup_channel $channel, %opts
	if $channels{$channel}{'type'} eq $type;
    }
}

=item C<dup_channel_setup ()>, C<drop_channel_setup ()>

Sometimes it is necessary to make temporary modifications to channels.
For instance one may want to disable a warning while processing a
particular file, and then restore the initial setup.  These two
functions make it easy: C<dup_channel_setup ()> saves a copy of the
current configuration for later restoration by
C<drop_channel_setup ()>.

You can think of this as a stack of configurations whose first entry
is the active one.  C<dup_channel_setup ()> duplicates the first
entry, while C<drop_channel_setup ()> just deletes it.

=cut

use vars qw (@_saved_channels @_saved_werrors);
@_saved_channels = ();
@_saved_werrors = ();

sub dup_channel_setup ()
{
  my %channels_copy;
  foreach my $k1 (keys %channels)
    {
      $channels_copy{$k1} = {%{$channels{$k1}}};
    }
  push @_saved_channels, \%channels_copy;
  push @_saved_werrors, $warnings_are_errors;
}

sub drop_channel_setup ()
{
  my $saved = pop @_saved_channels;
  %channels = %$saved;
  $warnings_are_errors = pop @_saved_werrors;
}

=item C<buffer_messages (@types)>, C<flush_messages ()>

By default, when C<msg> is called, messages are processed immediately.

Sometimes it is necessary to delay the output of messages.
For instance you might want to make diagnostics before
channels have been completely configured.

After C<buffer_messages(@types)> has been called, messages sent with
C<msg> to a channel whose type is listed in C<@types> will be stored in a
list for later processing.

This backlog of messages is processed when C<flush_messages> is
called, with the current channel options (not the options in effect,
at the time of C<msg>).  So for instance, if some channel was silenced
in the meantime, messages to this channel will not be printed.

C<flush_messages> cancels the effect of C<buffer_messages>.  Following
calls to C<msg> are processed immediately as usual.

=cut

sub buffer_messages (@)
{
  foreach my $type (@_)
    {
      $buffering{$type} = 1;
    }
}

sub flush_messages ()
{
  %buffering = ();
  foreach my $args (@backlog)
    {
      &msg (@$args);
    }
  @backlog = ();
}

=item C<setup_channel_queue ($queue, $key)>

Set the queue to fill for each channel that is ordered,
and the key to use for serialization.

=cut
sub setup_channel_queue ($$)
{
  my ($queue, $key) = @_;
  foreach my $channel (keys %channels)
    {
      setup_channel $channel, queue => $queue, queue_key => $key
        if $channels{$channel}{'ordered'};
    }
}

=item C<pop_channel_queue ($queue)>

pop a message off the $queue; the key has already been popped.

=cut
sub pop_channel_queue ($)
{
  my ($queue) = @_;
  return _dequeue ($queue);
}

=back

=head1 SEE ALSO

L<Autom4te::Location>

=head1 HISTORY

Written by Alexandre Duret-Lutz E<lt>F<adl@gnu.org>E<gt>.

=cut

1;

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
PK     ³4]¹êö	  ö	  
  Request.pmnu „[µü¤        # autoconf -- create `configure' using m4 macros
# Copyright (C) 2001-2003, 2009-2012 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

package Autom4te::Request;

=head1 NAME

Autom4te::Request - a single m4 run request

=head1 SYNOPSIS

  use Autom4te::Request;

=head1 DESCRIPTION

This perl module provides various general purpose support functions
used in several executables of the Autoconf and Automake packages.

=cut

use strict;
use Class::Struct;
use Carp;
use Data::Dumper;

struct
  (
   # The key of the cache files.
   'id' => "\$",
   # True iff %MACRO contains all the macros we want to trace.
   'valid' => "\$",
   # The include path.
   'path' => '@',
   # The set of input files.
   'input' => '@',
   # The set of macros currently traced.
   'macro' => '%',
  );


# Serialize a request or all the current requests.
sub marshall($)
{
  my ($caller) = @_;
  my $res = '';

  # CALLER is an object: instance method.
  my $marshall = Data::Dumper->new ([$caller]);
  $marshall->Indent(2)->Terse(0);
  $res = $marshall->Dump . "\n";

  return $res;
}


# includes_p ($SELF, @MACRO)
# --------------------------
# Does this request covers all the @MACRO.
sub includes_p
{
  my ($self, @macro) = @_;

  foreach (@macro)
    {
      return 0
	if ! exists ${$self->macro}{$_};
    }
  return 1;
}


=head1 SEE ALSO

L<Autom4te::C4che>

=head1 HISTORY

Written by Akim Demaille E<lt>F<akim@freefriends.org>E<gt>.

=cut


1; # for require

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
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  	  Getopt.pmnu „[µü¤        # Copyright (C) 2012 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

package Autom4te::Getopt;

=head1 NAME

Autom4te::Getopt - GCS conforming parser for command line options

=head1 SYNOPSIS

  use Autom4te::Getopt;

=head1 DESCRIPTION

Export a function C<parse_options>, performing parsing of command
line options in conformance to the GNU Coding standards.

=cut

use 5.006;
use strict;
use warnings FATAL => 'all';
use Exporter ();
use Getopt::Long ();
use Autom4te::ChannelDefs qw/fatal/;
use Carp qw/croak confess/;

use vars qw (@ISA @EXPORT);
@ISA = qw (Exporter);
@EXPORT= qw/getopt/;

=item C<parse_options (%option)>

Wrapper around C<Getopt::Long>, trying to conform to the GNU
Coding Standards for error messages.

=cut

sub parse_options (%)
{
  my %option = @_;

  Getopt::Long::Configure ("bundling", "pass_through");
  # Unrecognized options are passed through, so GetOption can only fail
  # due to internal errors or misuse of options specification.
  Getopt::Long::GetOptions (%option)
    or confess "error in options specification (likely)";

  if (@ARGV && $ARGV[0] =~ /^-./)
    {
      my %argopts;
      for my $k (keys %option)
	{
	  if ($k =~ /(.*)=s$/)
	    {
	      map { $argopts{(length ($_) == 1)
			     ? "-$_" : "--$_" } = 1; } (split (/\|/, $1));
	    }
	}
      if ($ARGV[0] eq '--')
	{
	  shift @ARGV;
	}
      elsif (exists $argopts{$ARGV[0]})
	{
	  fatal ("option '$ARGV[0]' requires an argument\n"
		 . "Try '$0 --help' for more information.");
	}
      else
	{
	  fatal ("unrecognized option '$ARGV[0]'.\n"
		 . "Try '$0 --help' for more information.");
	}
    }
}

=back

=head1 SEE ALSO

L<Getopt::Long>

=cut

1; # for require

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
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