#!/usr/bin/perl -w
#
# Build the auto-generated parts of the Wine makefiles.
#
# Copyright 2006 Alexandre Julliard
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
#

use strict;

# Dlls and programs that are 16-bit specific
my %modules16 =
(
  "ifsmgr.vxd" => 1,
  "mmdevldr.vxd" => 1,
  "monodebg.vxd" => 1,
  "vdhcp.vxd" => 1,
  "vmm.vxd" => 1,
  "vnbt.vxd" => 1,
  "vnetbios.vxd" => 1,
  "vtdapi.vxd" => 1,
  "vwin32.vxd" => 1,
  "w32skrnl.dll" => 1,
  "winevdm.exe" => 1,
  "wow32.dll" => 1,
);

my %exported_wine_headers = (
    "wine/debug.h" => 1,
    "wine/exception.h" => 1,
    "wine/library.h" => 1,
    "wine/itss.idl" => 1,
    "wine/svcctl.idl" => 1,
);

my %ignored_source_files = (
    "dlls/wineps.drv/afm2c.c" => 1,
    "dlls/wineps.drv/mkagl.c" => 1,
    "include/config.h.in" => 1,
    "include/stamp-h.in" => 1,
    "programs/winetest/dist.rc" => 1,
    "tools/makedep.c" => 1,
);

my @source_vars = (
    "BISON_SRCS",
    "C_SRCS",
    "FONT_SRCS",
    "HEADER_SRCS",
    "IDL_SRCS",
    "IN_SRCS",
    "LEX_SRCS",
    "MANPAGES",
    "MC_SRCS",
    "OBJC_SRCS",
    "PO_SRCS",
    "RC_SRCS",
    "SOURCES",
    "SVG_SRCS",
    "XTEMPLATE_SRCS"
);

my (@makefiles, %makefiles);

sub dirname($)
{
    my $ret = shift;
    return "" unless $ret =~ /\//;
    $ret =~ s!/[^/]*$!!;
    return $ret;
}

# update a file if changed
sub update_file($$)
{
    my $file = shift;
    my $new = shift;

    open FILE, ">$file.new" or die "cannot create $file.new";
    print FILE $new;
    close FILE;
    rename "$file.new", "$file";
    print "$file updated\n";
    if ($file eq "configure.ac")
    {
        system "autoconf";
        print "configure updated\n";
    }
}

# replace some lines in a file between two markers
sub replace_in_file($$$@)
{
    my $file = shift;
    my $start = shift;
    my $end = shift;
    my ($old, $new);

    open OLD_FILE, "$file" or die "cannot open $file";
    while (<OLD_FILE>)
    {
        $old .= $_;
        last if /$start/;
        $new .= $_;
    }

    $new .= join "", @_;

    my $skip = 1;
    while (<OLD_FILE>)
    {
        $old .= $_;
        $new .= $_ unless $skip;
        $skip = 0 if /$end/;
    }

    close OLD_FILE;
    update_file($file, $new) if $old ne $new;
}

# replace all source variables in a makefile
sub replace_makefile_variables($)
{
    my $file = shift;
    my $make = $makefiles{$file};
    my $source_vars_regexp = join "|", @source_vars;
    my %replaced;
    my $old;
    my $new;

    open OLD_FILE, "$file.in" or die "cannot open $file.in";
    while (<OLD_FILE>)
    {
        $old .= $_;
        if (/^\s*($source_vars_regexp)(\s*)=/)
        {
            # try to preserve formatting
            my $var = $1;
            my $spaces = $2;
            my $replaced = 0;
            my @values;

            if (defined ${$make}{"=$var"})
            {
                @values = @{${$make}{"=$var"}};
                ${$make}{$var} = \@values;
            }
            else
            {
                undef ${$make}{$var};
            }
            my $multiline = /\\$/ || (@values > 1);
            my $old_str = $_;
            while (/\\$/)
            {
                $_ = <OLD_FILE>;
                last unless $_;
                $old .= $_;
                $old_str .= $_;
            }
            my $new_str = "";
            if (!@values)
            {
                # nothing
            }
            elsif ($multiline)
            {
                $new_str = "$var = \\\n\t" . join(" \\\n\t", sort @values) . "\n";
                $new .= $new_str;
            }
            else
            {
                $new_str = "$var$spaces= @values\n";
                $new .= $new_str;
            }
            $replaced{$var} = 1;
            next;
        }
        $new .= $_;
    }
    # if we are using SOURCES, ignore the other variables
    unless ($replaced{"SOURCES"})
    {
        foreach my $var (@source_vars)
        {
            next if defined $replaced{$var};
            next if $var eq "SOURCES";
            next unless defined ${$make}{"=$var"};
            my @values = @{${$make}{"=$var"}};
            next unless @values;
            $new .= "\n$var = \\\n\t" . join(" \\\n\t", sort @values) . "\n";
        }
    }
    close OLD_FILE;
    update_file("$file.in", $new) if $old ne $new;
}

# parse the specified makefile and load the variables
sub parse_makefile($)
{
    my $file = shift;
    my %make;

    ($make{"=dir"} = $file) =~ s/[^\/]+$//;

    open MAKE, "$file.in" or die "cannot open $file.in\n";

    while (<MAKE>)
    {
        chomp;
        next if (/^\s*#/);
        while (/\\$/) { chop; $_ .= <MAKE>; chomp; }  # merge continued lines
        next if (/^\s*$/);

        if (/\@[A-Z_]+\@/)  # config.status substitution variable
        {
            die "Configure substitution is not allowed in $file" unless $file eq "Makefile";
        }
        if (/^\s*(MODULE|IMPORTLIB|TESTDLL|PARENTSRC|APPMODE)\s*=\s*(.*)/)
        {
            my $var = $1;
            $make{$var} = $2;
            next;
        }
        my $source_vars_regexp = join "|", @source_vars;
        if (/^\s*($source_vars_regexp|PROGRAMS|EXTRA_TARGETS|EXTRA_OBJS|INSTALL_LIB|INSTALL_DEV)\s*=\s*(.*)/)
        {
            my $var = $1;
            my @list = split(/\s+/, $2);
            $make{$var} = \@list;
            next;
        }
        if (/^\s*(TOPSRCDIR|TOPOBJDIR|SRCDIR|VPATH)\s*=\s*(.*)/)
        {
            die "Variable $1 in $file.in is obsolete";
        }
    }

    return %make;
}

# read pragma makedep flags from a source file
sub get_makedep_flags($)
{
    my $file = shift;
    my %flags;

    open FILE, $file or die "cannot open $file";
    if ($file =~ /\.sfd$/)
    {
        while (<FILE>)
        {
            next unless /^UComments:\s*\"(.*)\"$/;
            foreach my $pragma (split /\+AAoA/, $1)
            {
                next unless $pragma =~ /^#\s*pragma\s+makedep\s+(.*)/;
                foreach my $flag (split /\s+/, $1)
                {
                    $flags{$flag} = 1;
                    last if $flag eq "font";
                }
            }
        }
    }
    else
    {
        while (<FILE>)
        {
            next unless /^#\s*pragma\s+makedep\s+(.*)/;
            foreach my $flag (split /\s+/, $1)
            {
                last if $flag eq "depend";
                $flags{$flag} = 1;
            }
        }
    }
    close FILE;
    return %flags;
}

sub get_parent_makefile($)
{
    my $file = shift;
    my %make = %{$makefiles{$file}};
    my $reldir = $make{"PARENTSRC"} || "";
    return "" unless $reldir;
    (my $path = $file) =~ s/\/Makefile$/\//;
    while ($reldir =~ /^\.\.\//)
    {
        $reldir =~ s/^\.\.\///;
        $path =~ s/[^\/]+\/$//;
    }
    return "$path$reldir/Makefile";
}

# preserve shared source files that are listed in the existing makefile
sub preserve_shared_source_files($$$)
{
    my ($make, $parent, $var) = @_;
    my %srcs;

    return unless defined ${$parent}{"=$var"};
    foreach my $file (@{${$parent}{"=$var"}}) { $srcs{$file} = 1; }
    foreach my $file (@{${$make}{"=$var"}}) { $srcs{$file} = 0; }

    foreach my $file (@{${$make}{$var}})
    {
        next unless defined $srcs{$file} && $srcs{$file} == 1;
        push @{${$make}{"=$var"}}, $file;
    }
}

# assign source files to their respective makefile
sub assign_sources_to_makefiles(@)
{
    foreach my $file (@_)
    {
        next if defined $ignored_source_files{$file};
        next if $file =~ /Makefile\.in$/;
        my $dir = dirname( $file );
        my $subdir = $dir;

        while ($dir && !defined $makefiles{"$dir/Makefile"}) { $dir = dirname( $dir ); }
        $subdir =~ s/^$dir\/?//;
        next unless $dir;

        die "no makefile found for $file\n" unless defined $makefiles{"$dir/Makefile"};

        my $make = $makefiles{"$dir/Makefile"};
        my $name = substr( $file, length($dir) + 1 );

        next if $file =~ /^include\/wine\// && !get_makedep_flags($file) && !$exported_wine_headers{$name};

        if ($name =~ /\.m$/) { push @{${$make}{"=OBJC_SRCS"}}, $name; }
        elsif ($name =~ /\.l$/) { push @{${$make}{"=LEX_SRCS"}}, $name; }
        elsif ($name =~ /\.y$/) { push @{${$make}{"=BISON_SRCS"}}, $name; }
        elsif ($name =~ /\.svg$/) { push @{${$make}{"=SVG_SRCS"}}, $name; }
        elsif ($name =~ /\.sfd$/)
        {
            push @{${$make}{"=FONT_SRCS"}}, $name;
        }
        elsif ($name =~ /\.c$/)
        {
            push @{${$make}{"=C_SRCS"}}, $name;
        }
        elsif ($name =~ /\.h$/ || $name =~ /\.rh$/ || $name =~ /\.inl$/ || $name =~ /\.x$/)
        {
            next if $dir ne "include";
        }
        elsif ($name =~ /\.rc$/)
        {
            push @{${$make}{"=RC_SRCS"}}, $name;
        }
        elsif ($name =~ /\.mc$/)
        {
            push @{${$make}{"=MC_SRCS"}}, $name;
        }
        elsif ($name =~ /\.po$/)
        {
            push @{${$make}{"=PO_SRCS"}}, $name;
        }
        elsif ($name =~ /\.idl$/)
        {
            die "no makedep flags specified in $file" unless $dir eq "include" || get_makedep_flags($file);
            push @{${$make}{"=IDL_SRCS"}}, $name;
        }
        elsif ($name =~ /\.man\.in$/)
        {
            push @{${$make}{"=MANPAGES"}}, $name;
        }
        elsif ($name =~ /\.in$/)
        {
            push @{${$make}{"=IN_SRCS"}}, $name;
        }
        elsif ($name =~ /\.spec$/)
        {
            next unless defined ${$make}{"TESTDLL"};
        }
        elsif ($dir ne "loader")  # loader dir contains misc files
        {
            next;
        }
        push @{${$make}{"=SOURCES"}}, $name;
    }

    # preserve shared source files from the parent makefile
    foreach my $file (@makefiles)
    {
        my $make = $makefiles{$file};
        my $parent = get_parent_makefile( $file );
        next unless $parent;
        preserve_shared_source_files( $makefiles{$file}, $makefiles{$parent}, "C_SRCS" );
        preserve_shared_source_files( $makefiles{$file}, $makefiles{$parent}, "RC_SRCS" );
        preserve_shared_source_files( $makefiles{$file}, $makefiles{$parent}, "IDL_SRCS" );
        preserve_shared_source_files( $makefiles{$file}, $makefiles{$parent}, "LEX_SRCS" );
        preserve_shared_source_files( $makefiles{$file}, $makefiles{$parent}, "BISON_SRCS" );
    }
}

################################################################
# update the makefile list in configure.ac

sub update_makefiles(@)
{
    my (@lines);

    foreach my $file (sort @_)
    {
        next if $file eq "Makefile";
        my %make = %{$makefiles{$file}};
        (my $dir = $file) =~ s/^(.*)\/Makefile/$1/;
        my $args = "";
        if (defined($make{"TESTDLL"}))  # test
        {
            die "TESTDLL should not be defined in $file" unless $file =~ /\/tests\/Makefile$/;
            die "MODULE should not be defined in $file" if defined $make{"MODULE"};
            die "STATICLIB should not be defined in $file" if defined $make{"STATICLIB"};
        }
        elsif (defined($make{"MODULE"}) && $make{"MODULE"} =~ /\.a$/)  # import lib
        {
            die "MODULE should not be defined as static lib in $file" unless $file =~ /^dlls\//;
            die "APPMODE should not be defined in $file" if defined $make{"APPMODE"};
            die "STATICLIB should not be defined in $file" if defined $make{"STATICLIB"};
        }
        elsif (defined($make{"MODULE"}))  # dll or program
        {
            (my $name = $file) =~ s/^(dlls|programs)\/(.*)\/Makefile/$2/;
            die "MODULE should not be defined in $file" unless $file =~ /^(dlls|programs)\//;
            die "STATICLIB should not be defined in $file" if defined $make{"STATICLIB"};
            die "Invalid MODULE in $file" if $name =~ /\./ && $make{"MODULE"} ne $name;
            if ($file =~ /^programs\//)
            {
                die "APPMODE should be defined in $file" unless defined $make{"APPMODE"} ;
                die "APPMODE should contain -mconsole or -mwindows in $file" unless $make{"APPMODE"} =~ /-m(console|windows)/;
                die "Invalid MODULE in $file" unless $name =~ /\./ || $make{"MODULE"} eq "$name.exe";
            }
            else
            {
                die "APPMODE should not be defined in $file" if defined $make{"APPMODE"} ;
                die "Invalid MODULE in $file" unless $name =~ /\./ || $make{"MODULE"} eq "$name.dll";
            }
            if (defined $make{"IMPORTLIB"})
            {
                die "IMPORTLIB not allowed in programs\n" if $file =~ /^programs\//;
                die "Invalid IMPORTLIB name in $file" if $make{"IMPORTLIB"} =~ /\./;
            }
            $args = ",enable_win16" if $make{"MODULE"} =~ /16$/ || $modules16{$make{"MODULE"}};
        }
        elsif ($file =~ /^tools.*\/Makefile$/)
        {
            die "APPMODE should not be defined in $file" if defined $make{"APPMODE"};
            die "STATICLIB should not be defined in $file" if defined $make{"STATICLIB"};
            $args = ",,[test \"x\$enable_tools\" = xno]";
        }
        push @lines, "WINE_CONFIG_MAKEFILE($dir$args)\n";
    }

    # update the source variables in all the makefiles

    foreach my $file (sort @_) { replace_makefile_variables( $file ); }

    push @lines, "dnl End of auto-generated output commands\n";
    replace_in_file( "configure.ac", '^WINE_CONFIG_MAKEFILE', '^dnl End of auto-generated output commands\n$', @lines);
}


my $git_dir = $ENV{GIT_DIR} || ".git";
die "needs to be run from a git checkout" unless -d $git_dir;

my @all_files = split /\0/, `git ls-files -c -z`;
map { $ignored_source_files{$_} = 1; } split /\0/, `git ls-files -d -z`;
@makefiles = map { (my $ret = $_) =~ s/\.in$//; $ret; } grep /Makefile.in$/, @all_files;

foreach my $file (sort @makefiles)
{
    my %make = parse_makefile( $file );
    $makefiles{$file} = \%make;
}

assign_sources_to_makefiles( @all_files );
update_makefiles( @makefiles );