File Coverage

blib/lib/Alien/Libarchive/Installer.pm

Criterion	Covered	Total	%
statement	14	306	4.5
branch	1	148	0.6
condition	0	61	0.0
subroutine	5	20	25.0
pod	13	13	100.0
total	33	548	6.0

package Alien::Libarchive::Installer;

use strict;
use warnings;

# ABSTRACT: Installer for libarchive
our $VERSION = '0.14'; # VERSION


sub versions_available
{
  require HTTP::Tiny;
  my $url = "http://www.libarchive.org/downloads/";
  my $response = HTTP::Tiny->new->get($url);

  die sprintf("%s %s %s", $response->{status}, $response->{reason}, $url)
    unless $response->{success};

  my @versions;
  push @versions, [$1,$2,$3] while $response->{content} =~ /libarchive-([1-9][0-9]*)\.([0-9]+)\.([0-9]+)\.tar.gz/g;
  @versions = map { join '.', @$_ } sort { $a->[0] <=> $b->[0] || $a->[1] <=> $b->[1] || $a->[2] <=> $b->[2] } @versions;
}


sub fetch
{
  my($class, %options) = @_;

  my $dir = $options{dir} || eval { require File::Temp; File::Temp::tempdir( CLEANUP => 1 ) };

  require HTTP::Tiny;
  my $version = $options{version} || do {
    my @versions = $class->versions_available;
    die "unable to determine latest version from listing"
      unless @versions > 0;
    $versions[-1];
  };

  if(defined $ENV{ALIEN_LIBARCHIVE_INSTALL_MIRROR})
  {
    my $fn = File::Spec->catfile($ENV{ALIEN_LIBARCHIVE_INSTALL_MIRROR}, "libarchive-$version.tar.gz");
    return wantarray ? ($fn, $version) : $fn;
  }

  my $url = "http://www.libarchive.org/downloads/libarchive-$version.tar.gz";

  my $response = HTTP::Tiny->new->get($url);

  die sprintf("%s %s %s", $response->{status}, $response->{reason}, $url)
    unless $response->{success};

  require File::Spec;

  my $fn = File::Spec->catfile($dir, "libarchive-$version.tar.gz");

  open my $fh, '>', $fn;
  binmode $fh;
  print $fh $response->{content};
  close $fh;

  wantarray ? ($fn, $version) : $fn;
}


sub build_requires
{
  my %prereqs = (
    'HTTP::Tiny'   => 0,
    'Archive::Tar' => 0,
  );

  if($^O eq 'MSWin32')
  {
    require Config;
    if($Config::Config{cc} =~ /cl(\.exe)?$/i)
    {
      $prereqs{'Alien::CMake'} = '0.05';
    }
    else
    {
      $prereqs{'Alien::MSYS'} = '0.07';
      $prereqs{'PkgConfig'}   = '0.07620';
    }
  }

  \%prereqs;
}


sub system_requires
{
  my %prereqs = ();
  \%prereqs;
}


sub system_install
{
  my($class, %options) = @_;

  $options{alien} = 1 unless defined $options{alien};
  $options{test} ||= 'compile';
  die "test must be one of compile, ffi or both"
    unless $options{test} =~ /^(compile|ffi|both)$/;

  if($options{alien} && eval q{ use Alien::Libarchive 0.21; 1 })
  {
    my $alien = Alien::Libarchive->new;

    require File::Spec;
    my $dir;
    my(@dlls) = map {
      my($v,$d,$f) = File::Spec->splitpath($_);
      $dir = [$v,File::Spec->splitdir($d)];
      $f;
    } $alien->dlls;

    my $build = bless {
      cflags  => [$alien->cflags],
      libs    => [$alien->libs],
      dll_dir => $dir,
      dlls    => \@dlls,
      prefix  => File::Spec->rootdir,
    }, $class;
    eval {
      $build->test_compile_run || die $build->error if $options{test} =~ /^(compile|both)$/;
      $build->test_ffi || die $build->error if $options{test} =~ /^(ffi|both)$/;
    };
    return $build unless $@;
  }

  my $build = bless {
    cflags => _try_pkg_config(undef, 'cflags', '', ''),
    libs   => _try_pkg_config(undef, 'libs',   '-larchive', ''),
  }, $class;

  if($options{test} =~ /^(ffi|both)$/)
  {
    my @dir_search_list;

    if($^O eq 'MSWin32')
    {
      # On MSWin32 the entire path is not included in dl_library_path
      # but that is the most likely place that we will find dlls.
      @dir_search_list = grep { -d $_ } split /;/, $ENV{PATH};
    }
    else
    {
      require DynaLoader;
      @dir_search_list = grep { -d $_ } @DynaLoader::dl_library_path
    }

    found_dll: foreach my $dir (@dir_search_list)
    {
      my $dh;
      opendir($dh, $dir) || next;
      # sort by filename length so that libarchive.so.12.0.4
      # is preferred over libarchive.so.12 or libarchive.so
      # if only to make diagnostics point to the more specific
      # version.
      foreach my $file (sort { length $b <=> length $a } readdir $dh)
      {
        if($^O eq 'MSWin32')
        {
          next unless $file =~ /^libarchive-[0-9]+\.dll$/i;
        }
        elsif($^O eq 'cygwin')
        {
          next unless $file =~ /^cygarchive-[0-9]+\.dll$/i;
        }
        else
        {
          next unless $file =~ /^libarchive\.(dylib|so(\.[0-9]+)*)$/;
        }
        require File::Spec;
        my($v,$d) = File::Spec->splitpath($dir, 1);
        $build->{dll_dir} = [File::Spec->splitdir($d)];
        $build->{prefix}  = $v;
        $build->{dlls}    = [$file];
        closedir $dh;
        last found_dll;
      }
      closedir $dh;
    }
  }

  $build->test_compile_run || die $build->error if $options{test} =~ /^(compile|both)$/;
  $build->test_ffi || die $build->error if $options{test} =~ /^(ffi|both)$/;
  $build;
}


sub _try_pkg_config
{
  my($dir, $field, $guess, $extra) = @_;

  unless(defined $dir)
  {
    require File::Temp;
    $dir = File::Temp::tempdir(CLEANUP => 1);
  }

  require Config;
  local $ENV{PKG_CONFIG_PATH} = join $Config::Config{path_sep}, $dir, split /$Config::Config{path_sep}/, ($ENV{PKG_CONFIG_PATH}||'');

  my $value = eval {
    # you probably think I am crazy...
    eval q{ use PkgConfig 0.07620 };
    die $@ if $@;
    my $value = `$^X $INC{'PkgConfig.pm'} --silence-errors libarchive $extra --$field`;
    die if $?;
    $value;
  };

  unless(defined $value) {
    no warnings;
    $value = `pkg-config --silence-errors libarchive $extra --$field`;
    return $guess if $?;
  }

  chomp $value;
  require Text::ParseWords;
  [Text::ParseWords::shellwords($value)];
}

sub _msys
{
  my($sub) = @_;
  require Config;
  if($^O eq 'MSWin32')
  {
    if($Config::Config{cc} !~ /cl(\.exe)?$/i)
    {
      require Alien::MSYS;
      return Alien::MSYS::msys(sub{ $sub->('make') });
    }
  }
  $sub->($Config::Config{make});
}

sub build_install
{
  my($class, $prefix, %options) = @_;

  $options{test} ||= 'compile';
  die "test must be one of compile, ffi or both"
    unless $options{test} =~ /^(compile|ffi|both)$/;
  die "need an install prefix" unless $prefix;

  $prefix =~ s{\\}{/}g;

  my $dir = $options{dir} || do { require File::Temp; File::Temp::tempdir( CLEANUP => 1 ) };

  require Archive::Tar;
  my $tar = Archive::Tar->new;
  $tar->read($options{tar} || $class->fetch);

  require Cwd;
  my $save = Cwd::getcwd();

  chdir $dir;
  my $build = eval {

    $tar->extract;

    chdir do {
      opendir my $dh, '.';
      my(@list) = grep !/^\./,readdir $dh;
      close $dh;
      die "unable to find source in build root" if @list == 0;
      die "confused by multiple entries in the build root" if @list > 1;
      $list[0];
    };

    _msys(sub {
      my($make) = @_;
      require Config;
      if($Config::Config{cc} !~ /cl(\.exe)?$/i)
      {
        system 'sh', 'configure', "--prefix=$prefix", '--with-pic';
        die "configure failed" if $?;
      }
      else
      {
        require Alien::CMake;
        my $cmake = Alien::CMake->config('prefix') . '/bin/cmake.exe';
        my $system = $make =~ /nmake(\.exe)?$/ ? 'NMake Makefiles' : 'MinGW Makefiles';
        system $cmake,
          -G => $system,
          "-DCMAKE_MAKE_PROGRAM:PATH=$make",
          "-DCMAKE_INSTALL_PREFIX:PATH=$prefix",
          "-DENABLE_TEST=OFF",
          ".";
        die "cmake failed" if $?;
      }
      system $make, 'all';
      die "make all failed" if $?;
      system $make, 'install';
      die "make install failed" if $?;
    });

    require File::Spec;

    foreach my $name ($^O =~ /^(MSWin32|cygwin)$/ ? ('bin','lib') : ('lib'))
    {
      do {
        my $static_dir = File::Spec->catdir($prefix, $name);
        my $dll_dir    = File::Spec->catdir($prefix, 'dll');
        require File::Path;
        File::Path::mkpath($dll_dir, 0, 0755);
        my $dh;
        opendir $dh, $static_dir;
        my @list = readdir $dh;
        @list = grep { /\.so/ || /\.(dylib|la|dll|dll\.a)$/ } grep !/^\./, @list;
        closedir $dh;
        foreach my $basename (@list)
        {
          my $from = File::Spec->catfile($static_dir, $basename);
          my $to   = File::Spec->catfile($dll_dir,    $basename);
          if(-l $from)
          {
            symlink(readlink $from, $to);
            unlink($from);
          }
          else
          {
            require File::Copy;
            File::Copy::move($from, $to);
          }
        }
      };
    }

    my $pkg_config_dir = File::Spec->catdir($prefix, 'lib', 'pkgconfig');

    my $pcfile = File::Spec->catfile($pkg_config_dir, 'libarchive.pc');

    do {
      my @content;
      if($Config::Config{cc} !~ /cl(\.exe)?$/i)
      {
        open my $fh, '<', $pcfile;
        @content = map { s{$prefix}{'${pcfiledir}/../..'}eg; $_ } do { <$fh> };
        close $fh;
      }
      else
      {
        # TODO: later when we know the version with more
        # certainty, we can update this file with the
        # Version
        @content = join "\n", "prefix=\${pcfiledir}/../..",
                              "exec_prefix=\${prefix}",
                              "libdir=\${exec_prefix}/lib",
                              "includedir=\${prefix}/include",
                              "Name: libarchive",
                              "Description: library that can create and read several streaming archive formats",
                              "Cflags: -I\${includedir}",
                              "Libs: advapi32.lib \${libdir}/archive_static.lib",
                              "Libs.private: ",
                              "";
        require File::Path;
        File::Path::mkpath($pkg_config_dir, 0, 0755);
      }

      my($version) = map { /^Version:\s*(.*)$/; $1 } grep /^Version: /, @content;
      # older versions apparently didn't include the necessary -I and -L flags
      if(defined $version && $version =~ /^[12]\./)
      {
        for(@content)
        {
          s/^Libs: /Libs: -L\${libdir} /;
        }
        push @content, "Cflags: -I\${includedir}\n";
      }

      open my $fh, '>', $pcfile;
      print $fh @content;
      close $fh;
    };

    my $build = bless {
      cflags  => _try_pkg_config($pkg_config_dir, 'cflags', '-I' . File::Spec->catdir($prefix, 'include'), '--static'),
      libs    => _try_pkg_config($pkg_config_dir, 'libs',   '-L' . File::Spec->catdir($prefix, 'lib'),     '--static'),
      prefix  => $prefix,
      dll_dir => [ 'dll' ],
      dlls    => do {
        opendir(my $dh, File::Spec->catdir($prefix, 'dll'));
        [grep { ! -l File::Spec->catfile($prefix, 'dll', $_) } grep { /\.so/ || /\.(dll|dylib)$/ } grep !/^\./, readdir $dh];
      },
    }, $class;

    if($^O eq 'cygwin' || $^O eq 'MSWin32')
    {
      # TODO: should this go in the munged pc file?
      unshift @{ $build->{cflags} }, '-DLIBARCHIVE_STATIC';
    }

    $build->test_compile_run || die $build->error if $options{test} =~ /^(compile|both)$/;
    $build->test_ffi         || die $build->error if $options{test} =~ /^(ffi|both)$/;
    $build;
  };

  my $error = $@;
  chdir $save;
  die $error if $error;
  $build;
}


sub cflags  { shift->{cflags}  }
sub libs    { shift->{libs}    }
sub version { shift->{version} }

sub dlls
{
  my($self, $prefix) = @_;

  $prefix = $self->{prefix} unless defined $prefix;
  $prefix = '' if $^O eq 'MSWin32' && $prefix eq '\\';

  unless(defined $self->{dlls} && defined $self->{dll_dir})
  {
    # Question: is this necessary in light of the better
    # dll detection now done in system_install ?
    if($^O eq 'cygwin')
    {
      # /usr/bin/cygarchive-13.dll
      opendir my $dh, '/usr/bin';
      $self->{dlls} = [grep /^cygarchive-[0-9]+.dll$/i, readdir $dh];
      $self->{dll_dir} = [];
      $prefix = '/usr/bin';
      closedir $dh;
    }
    else
    {
      require DynaLoader;
      $self->{libs} = [] unless defined $self->{libs};
      $self->{libs} = [ $self->{libs} ] unless ref $self->{libs};
      my $path = DynaLoader::dl_findfile(grep /^-l/, @{ $self->libs });
      die "unable to find dynamic library" unless defined $path;
      require File::Spec;
      my($vol, $dirs, $file) = File::Spec->splitpath($path);
      if($^O eq 'openbsd')
      {
        # on openbsd we get the .a file back, so have to scan
        # for .so.#.# as there is no .so symlink
        opendir(my $dh, $dirs);
        $self->{dlls} = [grep /^libarchive.so/, readdir $dh];
        closedir $dh;
      }
      else
      {
        $self->{dlls} = [ $file ];
      }
      $self->{dll_dir} = [];
      $self->{prefix} = $prefix = File::Spec->catpath($vol, $dirs);
    }
  }

  if($prefix eq '' && $self->{dll_dir}->[0] eq '')
  {
    shift @{ $self->{dll_dir} };
  }

  require File::Spec;
  $^O eq 'MSWin32'
    ? map { File::Spec->catfile(         @{ $self->{dll_dir} }, $_ ) } @{ $self->{dlls} }
    : map { File::Spec->catfile($prefix, @{ $self->{dll_dir} }, $_ ) } @{ $self->{dlls} };
}


sub test_compile_run
{
  my($self, %opt) = @_;
  delete $self->{error};
  $self->{quiet} = 1 unless defined $self->{quiet};
  my $cbuilder = $opt{cbuilder} || do { require ExtUtils::CBuilder; ExtUtils::CBuilder->new(quiet => $self->{quiet}) };

  unless($cbuilder->have_compiler)
  {
    $self->{error} = 'no compiler';
    return;
  }

  require File::Spec;
  my $dir = $opt{dir} || do { require File::Temp; File::Temp::tempdir( CLEANUP => 1 ) };
  my $fn = File::Spec->catfile($dir, 'test.c');
  do {
    open my $fh, '>', $fn;
    print $fh "#include \n",
              "#include \n",
              "#include \n",
              "int\n",
              "main(int argc, char *argv[])\n",
              "{\n",
              "  printf(\"version = '%d'\\n\", archive_version_number());\n",
              "  return 0;\n",
              "}\n";
    close $fh;
  };

  my $test_object = eval {
    $cbuilder->compile(
      source               => $fn,
      extra_compiler_flags => $self->{cflags} || [],
    );
  };

  if(my $error = $@)
  {
    $self->{error} = $error;
    return;
  }

  my $test_exe = eval {
    $cbuilder->link_executable(
      objects            => $test_object,
      extra_linker_flags => $self->{libs} || [],
    );
  };

  if(my $error = $@)
  {
    $self->{error} = $error;
    return;
  }

  if($test_exe =~ /\s/)
  {
    $test_exe = Win32::GetShortPathName($test_exe) if $^O eq 'MSWin32';
    $test_exe = Cygwin::win_to_posix_path(Win32::GetShortPathName(Cygwin::posix_to_win_path($test_exe))) if $^O eq 'cygwin';
  }

  my $output = `$test_exe`;

  if($? == -1)
  {
    $self->{error} = "failed to execute $!";
    return;
  }
  elsif($? & 127)
  {
    $self->{error} = "child died with siganl " . ($? & 127);
    return;
  }
  elsif($?)
  {
    $self->{error} = "child exited with value " . ($? >> 8);
    return;
  }

  if($output =~ /version = '([0-9]+)([0-9]{3})([0-9]{3})'/)
  {
    return $self->{version} = join '.', map { int } $1, $2, $3;
  }
  else
  {
    $self->{error} = "unable to retrieve version from output";
    return;
  }
}


sub test_ffi
{
  my($self) = @_;
  require FFI::Raw;
  delete $self->{error};

  foreach my $dll ($self->dlls)
  {
    my $archive_version_number = eval {
      FFI::Raw->new(
        $dll, 'archive_version_number',
        FFI::Raw::int(),
      );
    };
    next if $@;
    if($archive_version_number->() =~ /^([0-9]+)([0-9]{3})([0-9]{3})/)
    {
      return $self->{version} = join '.', map { int } $1, $2, $3;
    }
  }
  $self->{error} = 'could not find archive_version_number';
  return;
}


sub error { shift->{error} }

1;

__END__