File Coverage

blib/lib/Module/Starter/Smart.pm

Criterion	Covered	Total	%
statement	136	150	90.6
branch	39	58	67.2
condition	9	19	47.3
subroutine	20	21	95.2
pod	8	8	100.0
total	212	256	82.8

package Module::Starter::Smart;

use warnings;
use strict;

=encoding utf8

=head1 NAME

Module::Starter::Smart - A Module::Starter plugin for adding new modules into
an existing distribution

=head1 VERSION

version 0.0.8

=cut

our $VERSION = '0.0.8';

=head1 SYNOPSIS

    use Module::Starter qw/Module::Starter::Smart/;
    Module::Starter->create_distro(%args);

    # or in ~/.module-starter/config
    plugin: Module::Starter::Smart

    # create a new distribution named 'Foo-Bar'
    $ module-starter --module=Foo::Bar

    # ... then add a new module
    $ module-starter --module=Foo::Bar::Me --distro=Foo-Bar

=head1 DESCRIPTION

Module::Starter::Smart is a simple helper plugin for L.  It
subclasses L and provides its own implementation for
several file creation subroutines, such as C, C,
C, and so on.  These new implementations were designed to work
with existing distributions.

When invoked, the plugin checks if the distribution is already created.  If so,
the plugin would bypass C) and go ahead pull in all the
existing modules and test files; these information would be used later in the
corresponding file creation subroutines for skipping already-created files.

B: This plugin only covers the simplest use cases.  For advanced usage,
check out L.


=head2 Example

Say you have an existing distro, Goof-Ball, and you want to add a new module,
Goof::Troop.

    % ls -R Goof-Ball
    Build.PL  Changes   MANIFEST  README    lib/      t/

    Goof-Ball/lib:
    Goof/

    Goof-Ball/lib/Goof:
    Ball.pm

    Goof-Ball/t:
    00.load.t       perlcritic.t    pod-coverage.t  pod.t

Go to the directory containing your existing distribution and run
module-starter, giving it the names of the existing distribution and the new
module:

    % module-starter --distro=Goof-Ball --module=Goof::Troop
    Created starter directories and files

    % ls -R Goof-Ball
    Build.PL  Changes   MANIFEST  README    lib/      t/

    Goof-Ball/lib:
    Goof/

    Goof-Ball/lib/Goof:
    Ball.pm   Troop.pm

    Goof-Ball/t:
    00.load.t       perlcritic.t    pod-coverage.t  pod.t

Troop.pm has been added to Goof-Ball/lib/Goof.

=cut

use parent qw(Module::Starter::Simple);

use ExtUtils::Command qw/mkpath/;
use File::Spec;

# Module implementation here
use subs qw/_unique_sort _pull_modules _list_modules _pull_t _list_t/;

=head1 INTERFACE

No public methods.  The module works by subclassing Module::Starter::Simple and
rewiring its internal behaviors.

=cut

sub create_distro {
    my $class = shift;
    my $self = ref $class? $class: $class->new(@_);

    my $basedir =
        $self->{dir} ||
        $self->{distro} ||
        do {
            (my $first = $self->{modules}[0]) =~ s/::/-/g;
            $first;
        };

    $self->{modules} = [ _unique_sort _pull_modules($basedir), @{$self->{modules}} ];
    $self->SUPER::create_distro;
}

sub create_basedir {
    my $self = shift;
    return $self->SUPER::create_basedir(@_) unless -e $self->{basedir} && !$self->{force};
    $self->progress( "Found $self->{basedir}.  Use --force if you want to stomp on it." );
}

sub create_modules {
    my $self = shift;
    $self->SUPER::create_modules(@_);
}

sub _create_module {
    my $self = shift;
    my $module = shift;
    my $rtname = shift;

    my @parts = split( /::/, $module );
    my $filepart = (pop @parts) . ".pm";
    my @dirparts = ( $self->{basedir}, 'lib', @parts );
    my $manifest_file = join( "/", "lib", @parts, $filepart );
    if ( @dirparts ) {
        my $dir = File::Spec->catdir( @dirparts );
        if ( not -d $dir ) {
            local @ARGV = $dir;
            mkpath @ARGV;
            $self->progress( "Created $dir" );
        }
    }

    my $module_file = File::Spec->catfile( @dirparts,  $filepart );

    $self->{module_file}{$module} =
        File::Spec->catfile('lib', @parts, $filepart);

    if (-e $module_file) {
        $self->progress( "Skipped $module_file" );
    } else {
        open( my $fh, ">", $module_file ) or die "Can't create $module_file: $!\n";
        print $fh $self->module_guts( $module, $rtname );
        close $fh;
        $self->progress( "Created $module_file" );
    }

    return $manifest_file;
}

sub create_t {
    my $self = shift;
    _unique_sort $self->SUPER::create_t(@_), _pull_t $self->{basedir};
}

sub _create_t {
    my $self     = shift;
    my $testdir  = @_ == 2 ? 't' : shift;
    my $filename = shift;
    my $content  = shift;

    my @dirparts = ( $self->{basedir}, $testdir );
    my $tdir = File::Spec->catdir( @dirparts );
    if ( not -d $tdir ) {
        local @ARGV = $tdir;
        mkpath();
        $self->progress( "Created $tdir" );
    }

    my $fname = File::Spec->catfile( @dirparts, $filename );

    if (-e $fname) {
        $self->progress( "Skipped $fname" );
    } else {
        open( my $fh, ">", $fname ) or die "Can't create $fname: $!\n";
        print $fh $content;
        close $fh;
        $self->progress( "Created $fname" );
    }

    return File::Spec->catfile( $testdir, $filename );
}

sub create_Makefile_PL {
    my $self = shift;
    my $main_module = shift;

    my @parts = split( /::/, $main_module );
    my $pm = pop @parts;
    my $main_pm_file = File::Spec->catfile( "lib", @parts, "${pm}.pm" );
    $main_pm_file =~ s{\\}{/}g; # even on Win32, use forward slash

    my $fname = File::Spec->catfile( $self->{basedir}, "Makefile.PL" );

    if (-e $fname) {
        $self->progress( "Skipped $fname" );
    } else {
        open( my $fh, ">", $fname ) or die "Can't create $fname: $!\n";
        print $fh $self->Makefile_PL_guts($main_module, $main_pm_file);
        close $fh;
        $self->progress( "Created $fname" );
    }

    return "Makefile.PL";
}

sub create_Build_PL {
    my $self = shift;
    my $main_module = shift;

    my @parts = split( /::/, $main_module );
    my $pm = pop @parts;
    my $main_pm_file = File::Spec->catfile( "lib", @parts, "${pm}.pm" );
    $main_pm_file =~ s{\\}{/}g; # even on Win32, use forward slash

    my $fname = File::Spec->catfile( $self->{basedir}, "Build.PL" );

    if (-e $fname) {
        $self->progress( "Skipped $fname" );
    } else {
        open( my $fh, ">", $fname ) or die "Can't create $fname: $!\n";
        print $fh $self->Build_PL_guts($main_module, $main_pm_file);
        close $fh;
        $self->progress( "Created $fname" );
    }

    return "Build.PL";
}

sub create_Changes {
    my $self = shift;

    my $fname = File::Spec->catfile( $self->{basedir}, "Changes" );

    if (-e $fname) {
        $self->progress( "Skipped $fname" );
    } else {
        open( my $fh, ">", $fname ) or die "Can't create $fname: $!\n";
        print $fh $self->Changes_guts();
        close $fh;
        $self->progress( "Created $fname" );
    }

    return "Changes";
}

sub create_README {
    my $self = shift;
    my $build_instructions = shift;

    my $fname = File::Spec->catfile( $self->{basedir}, "README" );

    if (-e $fname) {
        $self->progress( "Skipped $fname" );
    } else {
        open( my $fh, ">", $fname ) or die "Can't create $fname: $!\n";
        print $fh $self->README_guts($build_instructions);
        close $fh;
        $self->progress( "Created $fname" );
    }

    return "README";
}

# Utility functions
sub _pull_modules {
    my $basedir = shift;
    return unless $basedir;
    my $libdir = File::Spec->catdir($basedir, "lib");
    return unless $libdir && -d $libdir;
    return _list_modules($libdir);
}

sub _list_modules {
    my $dir = shift;
    my $prefix = shift || '';

    opendir my $dh, $dir or die "Cannot opendir $dir: $!";
    my @entries = grep { !/^\.{1,2}/ } readdir $dh;
    close $dh;

    my @modules = ();
    for (@entries) {
        my $name = File::Spec->catfile($dir, $_);
        push @modules, _list_modules($name, $prefix ? "$prefix\:\:$_": $_) and next if -d $name;
        $_ =~ s/\.pm$// and push @modules, $prefix ? "$prefix\:\:$_": $_ if $name =~ /\.pm$/;
    }

    return sort @modules;
}

sub _pull_t {
    my $basedir = shift;
    return unless $basedir;
    my $tdir = File::Spec->catdir($basedir, "t");
    return unless $tdir && -d $tdir;
    return _list_t($tdir);
}

sub _list_t {
    my $dir = shift;

    opendir my $dh, $dir or die "Cannot opendir $dir: $!";
    my @entries = grep { !/^\.{1,2}/ && /\.t$/ } readdir $dh;
    close $dh;

    map { "t/$_"  } @entries;
}

# Remove duplicated entries
sub _unique_sort {
    my %bag = map { $_ => 1 } @_;
    sort keys %bag;
}

# Magic true value required at end of module
1;

__END__