#!/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 %ignored_source_files = (
    "dlls/wineps.drv/afm2c.c" => 1,
    "dlls/wineps.drv/mkagl.c" => 1,
    "tools/makedep.c" => 1,
);

my (@makefiles, %makefiles);
my @nls_files;

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 $old;
    my $new;
    my $replaced = 0;
    my $value = "";

    $value = "\\\n\t" . join(" \\\n\t", sort @{${$make}{"=SOURCES"}}) if defined ${$make}{"=SOURCES"};

    open OLD_FILE, $file or die "cannot open $file";
    while (<OLD_FILE>)
    {
        $old .= $_;
        if (/^\s*SOURCES\s*=/)
        {
            my $old_str = $_;
            while (/\\$/)
            {
                $_ = <OLD_FILE>;
                last unless $_;
                $old .= $_;
                $old_str .= $_;
            }
            $new .= "SOURCES = $value\n" if $value;
            $replaced = 1;
            next;
        }
        $new .= $_;
    }
    unless ($replaced)
    {
        $new .= "\nSOURCES = $value\n" if $value;
    }
    close OLD_FILE;
    update_file($file, $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 or die "cannot open $file\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.in";
        }
        if (/^\s*(MODULE|IMPORTLIB|TESTDLL|STATICLIB|PARENTSRC|EXTRADLLFLAGS)\s*=\s*(.*)/)
        {
            my $var = $1;
            $make{$var} = $2;
            next;
        }
        if (/^\s*(SOURCES|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 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 = $file) =~ s/\/Makefile\.in$/\//;
    while ($reldir =~ /^\.\.\//)
    {
        $reldir =~ s/^\.\.\///;
        $path =~ s/[^\/]+\/$//;
    }
    return "$path$reldir/Makefile.in";
}

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

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

    foreach my $file (@{${$make}{SOURCES}})
    {
        next unless defined $srcs{$file} && $srcs{$file} == 1;
        push @{${$make}{"=SOURCES"}}, $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.in"}) { $dir = dirname( $dir ); }
        $subdir =~ s/^$dir\/?//;
        next unless $dir;

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

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

        if ($name =~ /\.h$/)
        {
            next if $dir ne "include";
        }
        elsif ($name =~ /\.idl$/)
        {
            die "no makedep flags specified in $file" unless $dir eq "include" || get_makedep_flags($file);
        }
        elsif ($name =~ /\.spec$/)
        {
            my $dllflags = ${$make}{"EXTRADLLFLAGS"} || "";
            next unless defined ${$make}{"TESTDLL"} ||
                ($dllflags =~ /-Wb,--data-only/) ||
                ($dllflags =~ /-Wl,--subsystem,native/);
        }
        elsif ($name =~ /\.nls$/)
        {
            push @nls_files, $name if $dir eq "nls";
        }
        elsif ($name =~ /\.xml$/)
        {
            next unless $dir eq "dlls/winewayland.drv";
        }
        elsif ($name !~ /\.(c|in|inl|l|m|mc|po|rc|rh|sfd|svg|x|y)$/)
        {
            next unless $dir eq "loader";  # loader dir contains misc files
        }
        push @{${$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} );
    }
}

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

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

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

sub update_wine_inf()
{
    my @lines;
    push @lines, "[NlsFiles]", sort grep(!/^sort/, @nls_files);
    push @lines, "\n[SortFiles]", sort grep(/^sort/, @nls_files);
    push @lines, "\n[WineSourceDirs]\n";
    replace_in_file "loader/wine.inf.in", '^\[NlsFiles\]', '^\[WineSourceDirs\]', join( "\n", @lines );
}

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

my @all_files = split /\0/, `git ls-files -c -z` or die "cannot get files list";
map { $ignored_source_files{$_} = 1; } split /\0/, `git ls-files -d -z`;
@makefiles = 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 );
update_wine_inf();