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1 package Zeal::Feed;
2
3 use 5.014000;
4 use strict;
5 use warnings;
6 use re '/s';
7
8 our $VERSION = '0.001';
9
10 use parent qw/Class::Accessor::Fast/;
11 __PACKAGE__->mk_ro_accessors(qw/version/);
12
13 use Cwd qw/getcwd/;
14 use File::Spec::Functions qw/catfile rel2abs/;
15 use HTTP::Tiny;
16
17 use Archive::Tar;
18 use File::Slurp qw/read_file/;
19 use File::Which;
20 use XML::Rules;
21
22 sub new {
23 my ($class, $url) = @_;
24 $class->new_from_content(HTTP::Tiny->new->get($url)->{content});
25 }
26
27 sub new_from_file {
28 my ($class, $file) = @_;
29 $class->new_from_content(scalar read_file $file);
30 }
31
32 sub new_from_content {
33 my ($class, $xml) = @_;
34 my ($version, @urls) = @_;
35
36 my $self = XML::Rules->parse(
37 rules => {
38 _default => 'content',
39 entry => 'pass',
40 url => 'content array',
41 'other-versions' => undef,
42 },
43 stripspaces => 3|4,
44 )->($xml);
45 bless $self, $class
46 }
47
48 sub urls {
49 my ($self) = @_;
50 @{$self->{url}}
51 }
52
53 sub url {
54 my ($self) = @_;
55 my @urls = $self->urls;
56 $urls[int rand @urls]
57 }
58
59 sub _unpack_tar_to_dir {
60 my ($file, $dir) = @_;
61 $file = rel2abs $file;
62 my $oldwd = getcwd;
63 chdir $dir;
64 my $tar = which 'tar' or which 'gtar';
65
66 # uncoverable branch true
67 # uncoverable condition false
68 local $ENV{ZEAL_USE_INTERNAL_TAR} = 1 if $file =~ /gz$|bz2$/ && $^O eq 'solaris';
69
70 if ($tar && !$ENV{ZEAL_USE_INTERNAL_TAR}) {
71 my $arg = '-xf';
72 $arg = '-xzf' if $file =~ /[.]t?gz$/;
73 $arg = '-xjf' if $file =~ /[.]bz2$/;
74 system $tar, $arg => $file
75 } else {
76 Archive::Tar->extract_archive($file);
77 }
78 chdir $oldwd;
79 }
80
81 sub download {
82 my ($self, $path) = @_;
83 my ($name) = $self->url =~ /([^\/])+$/;
84 my $file = catfile $path, $name;
85 HTTP::Tiny->new->mirror($self->url, $file);
86 _unpack_tar_to_dir $file, $path;
87 unlink $file;
88 }
89
90 1;
91 __END__
92
93 =encoding utf-8
94
95 =head1 NAME
96
97 Zeal::Feed - Class representing a Dash/Zeal documentation feed
98
99 =head1 SYNOPSIS
100
101 use Zeal::Feed;
102 my $feed = Zeal::Feed->new('http://example.com/feed.xml');
103 say $feed->version; # 12.2.3
104 say $feed->url; # http://another.example.com/file.tar.gz
105
106 # Download to /home/mgv/docsets/file.docset
107 $feed->download('/home/mgv/docsets/');
108
109 =head1 DESCRIPTION
110
111 Dash is an offline API documentation browser. Zeal::Feed is a class
112 representing a Dash/Zeal documentation feed.
113
114 A documentation feed is an XML file describing a docset. It contains
115 the version of the docset and one or more URLs to a (typically
116 .tar.gz) archive of the docset.
117
118 Available methods:
119
120 =over
121
122 =item Zeal::Feed->B<new>(I<$url>)
123
124 Create a Zeal::Feed object from an HTTP URL.
125
126 =item Zeal::Feed->B<new_from_file>(I<$file>)
127
128 Create a Zeal::Feed object from a file.
129
130 =item Zeal::Feed->B<new_from_content>(I<$xml>)
131
132 Create a Zeal::Feed object from a string.
133
134 =item $feed->B<version>
135
136 The version of this feed.
137
138 =item $feed->B<urls>
139
140 A list of URLs to this docset.
141
142 =item $feed->B<url>
143
144 An URL to this docset, randomly chosen from the list returned by B<urls>.
145
146 =item $feed->B<download>(I<$path>)
147
148 Download and unpack the docset inside the I<$path> directory.
149
150 Uses the F<tar> binary for unpacking if availablem, L<Archive::Tar>
151 otherwise. You can set the ZEAL_USE_INTERNAL_TAR environment variable
152 to a true value to force the use of L<Archive::Tar>.
153
154 =back
155
156 =head1 ENVIRONMENT
157
158 =over
159
160 =item ZEAL_USE_INTERNAL_TAR
161
162 If true, B<download> will always use L<Archive::Tar>.
163
164 =back
165
166 =head1 SEE ALSO
167
168 L<Zeal>, L<http://kapeli.com/dash>, L<http://zealdocs.org>
169
170 =head1 AUTHOR
171
172 Marius Gavrilescu, E<lt>marius@ieval.roE<gt>
173
174 =head1 COPYRIGHT AND LICENSE
175
176 Copyright (C) 2014-2015 by Marius Gavrilescu
177
178 This library is free software; you can redistribute it and/or modify
179 it under the same terms as Perl itself, either Perl version 5.20.1 or,
180 at your option, any later version of Perl 5 you may have available.
181
182
183 =cut
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