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t/app/Plack/Loader/Restarter.t  view on Meta::CPAN

use strict;
use warnings;
use Test::More;
use Compiler::Lexer;
use Compiler::Parser;
use Compiler::Parser::AST::Renderer;
use Test::Compiler::Parser;

subtest 'parse Plack/Loader/Restarter.pm' => sub {
    my $script = do { local $/; <DATA> };
    my $tokens = Compiler::Lexer->new('')->tokenize($script);
    my $ast = Compiler::Parser->new->parse($tokens);
    Compiler::Parser::AST::Renderer->new->render($ast);
    node_ok($ast->root, [
        Test::Compiler::Parser::package { 'Plack::Loader::Restarter',
        },
        module { 'strict',
        },
        module { 'warnings',
        },
        module { 'parent',
            args => reg_prefix { 'qw',
                expr => leaf 'Plack::Loader',
            },
        },
        module { 'Plack::Util',
        },
        module { 'Try::Tiny',
        },
        function { 'new',
            body => [
                branch { '=',
                    left => list { '()',
                        data => branch { ',',
                            left => leaf '$class',
                            right => leaf '$runner',
                        },
                    },
                    right => leaf '@_',
                },
                function_call { 'bless',
                    args => [
                        branch { ',',
                            left => hash_ref { '{}',
                                data => branch { '=>',
                                    left => leaf 'watch',
                                    right => array_ref { '[]',
                                    },
                                },
                            },
                            right => leaf '$class',
                        },
                    ],
                },
            ],
        },
        function { 'preload_app',
            body => [
                branch { '=',
                    left => list { '()',
                        data => branch { ',',
                            left => leaf '$self',
                            right => leaf '$builder',
                        },
                    },
                    right => leaf '@_',
                },
                branch { '=',
                    left => branch { '->',
                        left => leaf '$self',
                        right => hash_ref { '{}',
                            data => leaf 'builder',
                        },
                    },
                    right => leaf '$builder',
                },
            ],
        },
        function { 'watch',
            body => [
                branch { '=',
                    left => list { '()',
                        data => branch { ',',
                            left => leaf '$self',
                            right => leaf '@dir',
                        },
                    },
                    right => leaf '@_',

t/app/Plack/Loader/Restarter.t  view on Meta::CPAN

                        foreach_stmt { 'for',
                            cond => leaf '@restart',
                            true_stmt => function_call { 'warn',
                                args => [
                                    leaf '-- $ev->{path} updated.\n',
                                ],
                            },
                            itr => leaf '$ev',
                        },
                        branch { '->',
                            left => leaf '$self',
                            right => function_call { '_kill_child',
                                args => [
                                ],
                            },
                        },
                        function_call { 'warn',
                            args => [
                                leaf 'Successfully killed! Restarting the new server process.\n',
                            ],
                        },
                        branch { '->',
                            left => leaf '$self',
                            right => function_call { '_fork_and_start',
                                args => [
                                    list { '()',
                                        data => branch { ',',
                                            left => leaf '$server',
                                            right => leaf '$builder',
                                        },
                                    },
                                ],
                            },
                        },
                        if_stmt { 'unless',
                            expr => branch { '->',
                                left => leaf '$self',
                                right => hash_ref { '{}',
                                    data => leaf 'pid',
                                },
                            },
                            true_stmt => Test::Compiler::Parser::return { 'return',
                            },
                        },
                    ],
                },
            ],
        },
        leaf '1',
    ]);
};

done_testing;

__DATA__
package Plack::Loader::Restarter;
use strict;
use warnings;
use parent qw(Plack::Loader);
use Plack::Util;
use Try::Tiny;

sub new {
    my($class, $runner) = @_;
    bless { watch => [] }, $class;
}

sub preload_app {
    my($self, $builder) = @_;
    $self->{builder} = $builder;
}

sub watch {
    my($self, @dir) = @_;
    push @{$self->{watch}}, @dir;
}

sub _fork_and_start {
    my($self, $server) = @_;

    delete $self->{pid}; # re-init in case it's a restart

    my $pid = fork;
    die "Can't fork: $!" unless defined $pid;

    if ($pid == 0) { # child
        return $server->run($self->{builder}->());
    } else {
        $self->{pid} = $pid;
    }
}

sub _kill_child {
    my $self = shift;

    my $pid = $self->{pid} or return;
    warn "Killing the existing server (pid:$pid)\n";
    kill 'TERM' => $pid;
    waitpid($pid, 0);
}

sub valid_file {
    my($self, $file) = @_;

    # vim temporary file is  4913 to 5036
    # http://www.mail-archive.com/vim_dev@googlegroups.com/msg07518.html
    if ( $file->{path} =~ m{(\d+)$} && $1 >= 4913 && $1 <= 5036) {
        return 0;
    }
    $file->{path} !~ m!\.(?:git|svn)[/\\]|\.(?:bak|swp|swpx|swx)$|~$|_flymake\.p[lm]$|\.#!;
}

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

    $self->_fork_and_start($server, $builder);
    return unless $self->{pid};

    require Filesys::Notify::Simple;
    my $watcher = Filesys::Notify::Simple->new($self->{watch});
    warn "Watching @{$self->{watch}} for file updates.\n";