#!/usr/bin/perl
######################################################################
# Prelude
######################################################################

# Yes I know about autoconf ... and autoconf sux.

# assume standard: diff
# assume standard: perl

#TODO python 2.5 and perhaps a --disable-python 

#old: --with-menhir=/path/to/menhirLib or `ocamlfind query menhirLib`

my $project = 
    "coccinelle";
my $projectcmdline = 
    "spatch -cocci_file demos/simple.cocci demos/simple.c";


######################################################################
# Options
######################################################################

my $prefix="/usr/local";
my $python=1;

local $_ = join ' ', @ARGV;

# Parse options
/-h/ || /--help/ and die "usage: $0 [--prefix=path] [--without-python]\n";
/--prefix=([^ ]*)/ and $prefix = $1;
/--without-python/ and $python = 0;

#if($ARGV[0] =~ "--prefix=(.*)") {
#    $prefix = $1;
#}
#if($ARGV[1] =~ "--without-python") {
#    $python = 0;
#}

my $src="$prefix/share/$project";

######################################################################
# Side effects
######################################################################


######################################################################
# Helpers
######################################################################
#BEGIN { die "need Perl 5 or greater" if $] < 5 ; }

#use Common;
sub pr2 { print STDERR "@_\n" }
sub cat { 
    my ($what) = @_;
    my @list;
    open(TMP, $what);
    while(<TMP>) { push @list, "$_"; }
    \@list;
}
sub notb   { !$_[0] }
sub mapf   { my ($f, $xs) = @_; [ map { &$f($_) } @{$xs} ] }
sub plural { my ($e) = @_; if ($e > 1) { "s" } else { "" } }

sub check_config { my ($command, $expect, $msggood, $msgbad) = @_;
    my $error = 0;
		   
    my $full = cat($command);
    my $res = join(" ", @{$full});
#	       pr2 $res;
    if(notb($res =~ $expect)) { $error++; pr2 "!!!! $msgbad !!!!"; }
    else { pr2 $msggood }
    return $error;
}

######################################################################
# Let's go
######################################################################
pr2 "Checking your configuration.\n";

my $error = 0;


#---------------------------------------------------------------------
# Compilers and runtimes
#---------------------------------------------------------------------
$error += 
    check_config("echo \"1;;\\n\" | ocaml |",
#                 "Objective(.*) 3.0[9]",
                 "Objective(.*) 3.",
                 "OCaml (the wonderful language) is present.",
                 "The program ocaml is missing or is not a good version. We need at least 3.09",
                 );

#we have cached the result of menhir in the tgz we build.

#$error += 
#    check_config("menhir --version |",
#                 "menhir, version 20071212",
##                 "menhir, version 2006.*",
#                 "Menhir (the parser generator) is present.",
#                 "The program menhir is missing or is not a good version.",
#                 );


#---------------------------------------------------------------
# Developers tools
#---------------------------------------------------------------

pr2 "";

$error += check_config(
  "make -v 2>&1 |grep Make|",
  "GNU Make 3\.[0-9]+", #version 3.81
  "make (gnu version) is present.",
  "The program gnu make is missing or is not a good version.
We need  3.XX",
);


#---------------------------------------------------------------------
# More developers tools
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Librairies
#---------------------------------------------------------------------

######################################################################
# Generate config files (platform/portability issues)
######################################################################


######################################################################
# Generate globals files (features issues)
######################################################################

######################################################################
# Diagnostic 
######################################################################


if($error) { 
    pr2 "
----------------------------------------------------------------------
!!!! There seems to have problem, we have found $error missing package" . 
plural($error) . ".
" . (($error > 1) ? "Some of those packages" : "This package") . 
    " may be installed by picking " . ($error > 1 ? "them" : "it") . 
    " in $project-dependencies.tgz available
on the $project website. !!!!
----------------------------------------------------------------------
";
} else { 

    pr2 "
----------------------------------------------------------------------

All seems fine for $project.

To compile $project type:
 make depend; make

To install type:
 make install

Then, to test $project simply type:
 $projectcmdline

";

    if($python) {
        pr2 
"To use the python SmPL feature you may have to set some environment variables.
For bash do:
export LD_LIBRARY_PATH=\$LD_LIBRARY_PATH:$prefix/lib
export PYTHONPATH=\$PYTHONPATH:$src/python
"
    }
    pr2 "
----------------------------------------------------------------------
";
}



######################################################################
# Generating the configuration
######################################################################

pr2 "$project target prefix: $prefix (you can use --prefix to override it)";
pr2 "Generating Makefile.config";
open(CONFIG, ">Makefile.config");
print CONFIG "# autogenerated by configure

# Where to install the binary
BINDIR=$prefix/bin

# Where to install the man pages
MANDIR=$prefix/man

# Where to install the lib
LIBDIR=$prefix/lib

# Where to install the configuration files
SHAREDIR=$src

# Features
FEATURE_PYTHON=$python
";

pr2 "Modifying globals/config.ml";
pr2 "Generating appropriate links in python/ (python=$python)";
my $pythonprefix = $python ? "yes_" : "no_";
`cd python; rm -f  pycocci.ml pycocci_aux.ml;`;
`cd python; ln -s ${pythonprefix}pycocci.ml pycocci.ml; `;
`cd python; ln -s ${pythonprefix}pycocci_aux.ml pycocci_aux.ml;`;
`cd python; make depend`;

my $command = "perl -p -i -e 's#Not_found.\*#Not_found->\\\"$src\\\"#' globals/config.ml";
`$command`;