File Coverage

lib/App/p5stack.pm

Criterion	Covered	Total	%
statement	75	167	44.9
branch	15	54	27.7
condition	2	3	66.6
subroutine	14	24	58.3
pod	0	2	0.0
total	106	250	42.4

package App::p5stack;
# ABSTRACT: manage your dependencies and perl requirements locally

use strict;
use warnings;

use Cwd;
use File::Which;
use File::Basename;
use File::Spec::Functions;
use File::Path qw/make_path/;
use Path::Tiny;
use Archive::Tar;
use Data::Dumper;
use YAML;

sub new {
  my ($class, @argv) = @_;
  my $self = bless {}, $class;

  $self->{orig_argv} = [@argv];
  $self->{command} = @argv ? lc shift @argv : '';
  $self->{argv} = [@argv];

  # handle config
  $self->_do_config;

  return $self;
}

sub run {
  my ($self) = @_;

  if ($self->{command} eq 'setup') { $self->_do_setup; }
  elsif ($self->{command} eq 'perl') { $self->_do_perl; }
  elsif ($self->{command} eq 'cpanm') { $self->_do_cpanm; }
  elsif ($self->{command} eq 'bin') { $self->_do_bin; }
  elsif ($self->{command} eq 'run') { $self->_do_run; }
  else { $self->_do_help; }
}

sub _do_config {
  my ($self) = @_;

  # set some defaults
  $self->{perl} = 'system';
  $self->{deps} = 'dzil';
  $self->{skip_install} = 1;
  $self->{perls_root} = catfile($ENV{HOME},'.p5stack','perls');
  $self->{perl_version} = '5.20.3';

  # guess stuff from context
  $self->{deps} = 'cpanfile' if -e 'cpanfile';

  # read config from file if available
  my $file;
  -e 'p5stack.yml' and $file = 'p5stack.yml';
  -e "$ENV{HOME}.p5stack/p5stack.yml" and $file = "$ENV{HOME}.p5stack/p5stack.yml";  # FIXME
  $ENV{P5STACKCFG} and $file = $ENV{P5STACKCFG};

  my $config;
  if ($file) {
    my $yaml = path($file)->slurp_utf8;
    $config = Load $yaml;
  }

  # FIXME re-factor after logic is more stable
  if ( file_name_is_absolute($config->{perl}) ) {
    $self->{perl_version} = _get_perl_version($config->{perl});
    $self->{perl} = $config->{perl};
  }
  if ( $self->{perl} eq 'system' ) {
    $self->{perl} = which 'perl';
    $self->{perl_version} = _get_perl_version($self->{perl});
  }
  if ( exists($config->{perl}) and $config->{perl} =~ m/^[\d\.]+$/ ) {
    $self->{perl_version} = $config->{perl};
    my $perl = catfile($self->{perls_root},$config->{perl},'bin','perl');
    $self->{perl} = $perl;

    $self->{skip_install} = 0 unless -e $perl;
  }
  for (qw/deps/) {
    $self->{$_} = $config->{$_} if exists $config->{$_};
  }

  # set more stuff
  $self->{home} = getcwd;
  $self->{local_lib} = catfile($self->{home},'.local',$self->{perl_version});
  $self->{local_bin} = catfile($self->{home},'.local',$self->{perl_version},'bin');
  $self->{Ilib} = catfile($self->{home},'.local',$self->{perl_version},'lib','perl5');
  $self->{log_file} = catfile($ENV{HOME},'.p5stack','p5stack-setup.log');
}

sub _do_setup {
  my ($self) = @_;

  _log('Hammering setup ...');
  _log("Tail ".catfile('$HOME','.p5stack','p5stack-setup.log')." to follow the process ...");

  $self->_do_install_perl_release;

  system "curl -s -L https://cpanmin.us | $self->{perl} - -l $self->{local_lib} --reinstall --no-sudo App::cpanminus local::lib > $self->{log_file} 2>&1";

  _log("Getting dependencies info using '$self->{deps}' ...");
  _log('Installing dependencies ...');
  my $cpanm = $self->_get_cpanm;

  if ($self->{deps} eq 'dzil') {
    my $dzil = which 'dzil';
    $self->_do_cpanm("Dist::Zilla") unless $dzil;

    unless (-e catfile($self->{home},'dist.ini')) {
      _log('Configuration is set to use "dzil" to gather dependencies information, but no "dist.ini" file was found in current directory.. exiting.');
      exit;
    }
    system "$dzil listdeps | $cpanm --no-sudo -l $self->{local_lib}";
  }
  if ($self->{deps} eq 'cpanfile') {
    unless (-e catfile($self->{home},'cpanfile')) {
      _log('Configuration is set to use "cpanfile" to gather dependencies information, but no "cpanfile" file was found in current directory.. exiting.');
      exit;
    }
    $self->_do_cpanm("--installdeps .");
  }

  print "[p5stack] Setup done, use 'p5stack perl' to run your application.\n";
}

sub _get_cpanm {
  my ($self) = @_;

  my $cpanm = catfile($self->{local_lib}, 'bin', 'cpanm');
  $cpanm = which 'cpanm' unless $cpanm;  # FIXME default to system?

  return $cpanm;
}

sub _do_install_perl_release {
  my ($self) = @_;

  if (-e $self->{perl}) {
    _log("Found $self->{perl_version} release using it.");
    return;
  }

  my $curl = which 'curl';  # TODO failsafe to wget ?
  my $file = join '', 'perl-', $self->{perl_version}, '.tar.gz';
  my $dest = catfile($self->{perls_root}, $file);
  my $url = join '', 'http://www.cpan.org/src/5.0/', $file;

  _log("Downloading $self->{perl_version} release ...");
  make_path(dirname($dest)) unless -e dirname($dest);
  system "$curl -s -o $dest $url" unless -e $dest;

  my $curr = getcwd;
  chdir $self->{perls_root};

  _log("Extracting $self->{perl_version} release ...");
  Archive::Tar->extract_archive($file);

  chdir catfile($self->{perls_root}, "perl-$self->{perl_version}");

  _log("Configuring $self->{perl_version} release ...");
  my $prefix = catfile($self->{perls_root}, $self->{perl_version});
  system "sh Configure -de -Dprefix=$prefix > $self->{log_file} 2>&1";

  _log("Building $self->{perl_version} release ...");
  system "make >> $self->{log_file} 2>&1";

  _log("Testing $self->{perl_version} release ...");
  system "make test >> $self->{log_file} 2>&1";

  _log("Installing $self->{perl_version} release ...");
  system "make install >> $self->{log_file} 2>&1";

}

sub _do_perl {
  my ($self) = @_;

  my $run = join(' ',$self->{perl}, "-I $self->{Ilib}",
              "-Mlocal::lib", @{$self->{argv}});

  system $run;
}

sub _do_cpanm {
  my ($self, @args) = @_;
  @args = @{$self->{argv}} unless @args;

  my $cpanm = $self->_get_cpanm;
  my $log = "";
  $log = ">> $self->{log_file} 2>&1" if $self->{command} eq 'setup';
  my $run = join ' ', $cpanm, "--no-sudo", "-L $self->{local_lib}", @args, $log;

  system $run;
}

sub _do_bin {
  my ($self) = @_;

  my @argv = @{ $self->{argv} };
  my $bin = catfile($self->{local_bin}, shift @argv);
  my @env = ("PERL5LIB=$self->{Ilib}", "PATH=$self->{local_bin}:\$PATH");
  my $run = join ' ', @env, $bin, @argv;

  system $run;
}

sub _do_run {
  my ($self) = @_;

  my @argv = @{ $self->{argv} };
  my $comm = shift @argv;
  my @env = ("PERL5LIB=$self->{Ilib}", "PATH=$self->{local_bin}:\$PATH");
  my $run = join ' ', @env, $comm, @argv;

  system $run;
}

sub _get_perl_version {
  my ($perl) = @_;

  my $version = `$perl -e 'print \$^V'`;
  $version =~ s/^v//;

  return $version;
}

sub _log {
  my ($msg) = @_;

  # FIXME smaller timestamp
  my $now = localtime;
  $now =~ s/\s\d+$//;
  $now =~ s/^\w+/-/;

  print "[p5stack $now] $msg\n";
}

sub _do_help {
  print "Usage:\n",
    "  \$ p5stack setup                  # setup env in current directory\n",
    "  \$ p5stack perl  [args]  # run a program\n",
    "  \$ p5stack bin  [args]      # execute a locally installed bin file\n",
    "  \$ p5stack run  [args]   # setup env and run an arbitrary command\n",
    "  \$ p5stack cpanm [args]           # execute local env cpanm\n";
}

1;

__END__