package GNUACEWorkspaceCreator;

# ************************************************************
# Description   : A GNU Workspace (GNUmakefile) creator for ACE
# Author        : Chad Elliott
# Create Date   : 5/13/2002
# ************************************************************

# ************************************************************
# Pragmas
# ************************************************************

use strict;
use File::Basename;

use GNUACEProjectCreator;
use WorkspaceCreator;

use vars qw(@ISA);
@ISA = qw(WorkspaceCreator);

# ************************************************************
# Subroutine Section
# ************************************************************

sub generate_implicit_project_dependencies {
  #my($self) = shift;
  return 1;
}


sub workspace_file_name {
  my($self) = shift;
  return $self->get_modified_workspace_name('GNUmakefile', '');
}


sub workspace_per_project {
  #my($self) = shift;
  return 1;
}


sub pre_workspace {
  my($self) = shift;
  my($fh)   = shift;
  my($crlf) = $self->crlf();

  print $fh '# -*- makefile -*-', $crlf,
            '#-------------------------------------------------------------------------', $crlf,
            '#       GNU ACE Workspace', $crlf,
            '#', $crlf,
            '# $Id$', $crlf,
            '#', $crlf,
            '# This file was generated by MPC.  Any changes made directly to', $crlf,
            '# this file will be lost the next time it is generated.', $crlf,
            '#', $crlf,
            '# MPC Command:', $crlf,
            "# $0 @ARGV", $crlf,
            '#', $crlf,
            '#-------------------------------------------------------------------------', $crlf,
            'MAKEFILE = ', $self->get_current_output_name(), $crlf;
}


sub write_comps {
  my($self)    = shift;
  my($fh)      = shift;
  my($crlf)    = $self->crlf();
  my(%targnum) = ();
  my($pjs)     = $self->get_project_info();
  my(@list)    = $self->number_target_deps($self->get_projects(),
                                           $pjs, \%targnum);

  ## Print out some preliminary information
  print $fh $crlf,
            "ifeq (\$(findstring k,\$(MAKEFLAGS)),k)$crlf",
            "  KEEP_GOING = -$crlf",
            "endif$crlf$crlf",
            "include \$(ACE_ROOT)/include/makeinclude/macros.GNU$crlf",
            $crlf;

  ## Determine the ordering of the sub-directories
  my(@dirs)  = ();
  my(%found) = ();
  foreach my $file (reverse @list) {
    my($dir) = $self->get_first_level_directory($file);
    if ($dir ne '.') {
      if (!defined $found{$dir}) {
        $found{$dir} = 1;
        unshift(@dirs, $dir);
      }
    }
  }
  my($need_dirs) = ($#dirs > -1);

  ## Store the local projects in a separate list
  my(@lprj)   = ();
  my(%dirprj) = ();
  foreach my $project (@list) {
    if ($project !~ /\//) {
      push(@lprj, $project);
      if ($need_dirs && defined $targnum{$project}) {
        foreach my $number (@{$targnum{$project}}) {
          if ($list[$number] =~ /\//) {
            ## If any local project depends on a project that is not
            ## in this directory, we can not rely on the directory
            ## recursion to get the correct dependencies.  We will do
            ## all projects as local targets.
            @lprj = ();
            foreach my $prj (@list) {
              push(@lprj, $prj);
              if ($prj =~ /\//) {
                $dirprj{$prj} = 1;
              }
            }
            $need_dirs = 0;
            last;
          }
        }
        if (!$need_dirs) {
          last;
        }
      }
    }
  }

  if ($#lprj >= 0) {
    ## Print out the all target first.  This will allow multiple projects
    ## within the same directory to build in parallel.
    print $fh 'all:';
    foreach my $project (@lprj) {
      print $fh ' ', $$pjs{$project}->[0];
    }
    print $fh $crlf;
    if ($need_dirs) {
      foreach my $dir (@dirs) {
        print $fh "\t\$(KEEP_GOING)\@cd $dir && ",
                  "\$(MAKE) -f \$(MAKEFILE) \$(\@)$crlf";
      }
    }

    ## Print out each target separately.  Make can decide on which
    ## targets can be built in parallel because we add the local
    ## dependencies.
    foreach my $project (@lprj) {
      print $fh $crlf, '.PHONY: ', $$pjs{$project}->[0],
                $crlf, $$pjs{$project}->[0], ':';
      if (defined $targnum{$project}) {
        foreach my $number (@{$targnum{$project}}) {
          print $fh ' ', $$pjs{$list[$number]}->[0];
        }
      }
      print $fh $crlf,
                "\t\$(KEEP_GOING)\@";
      if (defined $dirprj{$project}) {
        print $fh "cd ", $self->mpc_dirname($project),
                  " && \$(MAKE) -f ", basename($project), $crlf;
      }
      else {
        print $fh "\$(MAKE) -f $project$crlf";
      }
    }
    print $fh $crlf,
              'REMAINING_TARGETS := ',
              '$(subst all, , $(TARGETS_NESTED:.nested=)) $(CUSTOM_TARGETS)',
              $crlf;
  }
  else {
    print $fh 'REMAINING_TARGETS := $(TARGETS_NESTED:.nested=) ',
              '$(CUSTOM_TARGETS)', $crlf;
  }

  ## Print out the remaing targets.
  ## They will be handled serially by make.
  print $fh "\$(REMAINING_TARGETS):$crlf";
  foreach my $project (@lprj) {
    print $fh "\t\$(KEEP_GOING)\@";
    if (defined $dirprj{$project}) {
      print $fh "cd ", $self->mpc_dirname($project),
                " && \$(MAKE) -f ", basename($project), " \$(\@)", $crlf;
    }
    else {
      print $fh "\$(MAKE) -f $project \$(\@)$crlf";
    }
  }
  if ($need_dirs) {
    foreach my $dir (@dirs) {
      print $fh "\t\$(KEEP_GOING)\@cd $dir && ",
                "\$(MAKE) -f \$(MAKEFILE) \$(\@)$crlf";
    }
  }
  print $fh $crlf;
}

1;