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use alienfile;

# Alien::ckdl always installs from source ("share").
# Pinned to a specific upstream commit of https://github.com/tjol/ckdl
# so builds are reproducible. Bump $CKDL_COMMIT to roll forward.
# Built statically; ckdl's CMake build is intentionally bypassed so we
# do not pull in Python/Cython, the C++ bindings, or the upstream test
# suite.
probe sub { 'share' };

# Pinned upstream commit (tjol/ckdl). Update both the SHA and the short
# version tag together when bumping.
my $CKDL_COMMIT  = 'c9c33fe64446287215e80705545139d92a48f829';
my $CKDL_VERSION = '0.0.0-' . substr($CKDL_COMMIT, 0, 12);

share {
    my $tarball = "https://github.com/tjol/ckdl/archive/$CKDL_COMMIT.tar.gz";

    start_url $tarball;

    plugin 'Fetch::HTTPTiny' => $tarball;
    plugin 'Decode::HTML'    => ();
    plugin 'Extract'         => 'tar.gz';

    meta->around_hook(
        fetch => sub {
            my ($orig, $build, @args) = @_;
            my $res = $orig->($build, @args);
            # GitHub's commit tarballs carry no upstream version metadata;
            # stamp the pinned commit so Alien::Build has something stable.
            $res->{version} = $CKDL_VERSION;
            $res;
        },
    );

    build sub {
        my ($build) = @_;
        require ExtUtils::CBuilder;
        require File::Copy;
        require File::Path;
        require File::Find;
        require File::Spec;
        require Config;

        # Locate the unpacked ckdl source tree. Alien::Build sometimes chdirs
        # into the extracted directory and sometimes leaves cwd as its parent.
        my $srcdir;
        if (-f 'CMakeLists.txt' && -d 'src' && -d 'include') {
            $srcdir = '.';
        }
        else {
            ($srcdir) = grep { -d $_ && -f File::Spec->catfile($_, 'CMakeLists.txt') }
                glob 'ckdl-*';
        }
        die "could not locate extracted ckdl source tree (cwd=" . `pwd` . ")"
            unless $srcdir;

        my $cb = ExtUtils::CBuilder->new(quiet => 0);

        my @units = qw(bigint compat emitter parser str tokenizer utf8);
        my @objects;
        for my $unit (@units) {
            my $src = File::Spec->catfile($srcdir, 'src', "$unit.c");
            my $obj = $cb->compile(
                source               => $src,
                include_dirs         => [
                    File::Spec->catdir($srcdir, 'include'),