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1 | package Module::Build::YAML; |
2 | |
3 | use strict; |
dc8021d3 |
4 | use vars qw($VERSION @EXPORT @EXPORT_OK); |
5 | $VERSION = "0.50"; |
6 | @EXPORT = (); |
7 | @EXPORT_OK = qw(Dump Load DumpFile LoadFile); |
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8 | |
9 | sub new { |
10 | my $this = shift; |
11 | my $class = ref($this) || $this; |
12 | my $self = {}; |
13 | bless $self, $class; |
14 | return($self); |
15 | } |
16 | |
17 | sub Dump { |
18 | shift if ($_[0] eq __PACKAGE__ || ref($_[0]) eq __PACKAGE__); |
19 | my $yaml = ""; |
20 | foreach my $item (@_) { |
21 | $yaml .= "---\n"; |
22 | $yaml .= &_yaml_chunk("", $item); |
23 | } |
24 | return $yaml; |
25 | } |
26 | |
27 | sub Load { |
28 | shift if ($_[0] eq __PACKAGE__ || ref($_[0]) eq __PACKAGE__); |
29 | die "not yet implemented"; |
30 | } |
31 | |
32 | # This is basically copied out of YAML.pm and simplified a little. |
33 | sub DumpFile { |
34 | shift if ($_[0] eq __PACKAGE__ || ref($_[0]) eq __PACKAGE__); |
35 | my $filename = shift; |
36 | local $/ = "\n"; # reset special to "sane" |
37 | my $mode = '>'; |
38 | if ($filename =~ /^\s*(>{1,2})\s*(.*)$/) { |
39 | ($mode, $filename) = ($1, $2); |
40 | } |
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41 | open my $OUT, "$mode $filename" |
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42 | or die "Can't open $filename for writing: $!"; |
43 | print $OUT Dump(@_); |
44 | close $OUT; |
45 | } |
46 | |
47 | # This is basically copied out of YAML.pm and simplified a little. |
48 | sub LoadFile { |
49 | shift if ($_[0] eq __PACKAGE__ || ref($_[0]) eq __PACKAGE__); |
50 | my $filename = shift; |
51 | open my $IN, $filename |
52 | or die "Can't open $filename for reading: $!"; |
53 | return Load(do { local $/; <$IN> }); |
54 | close $IN; |
55 | } |
56 | |
57 | sub _yaml_chunk { |
58 | my ($indent, $values) = @_; |
59 | my $yaml_chunk = ""; |
60 | my $ref = ref($values); |
61 | my ($value, @allkeys, %keyseen); |
62 | if (!$ref) { # a scalar |
63 | $yaml_chunk .= &_yaml_value($values) . "\n"; |
64 | } |
65 | elsif ($ref eq "ARRAY") { |
66 | foreach $value (@$values) { |
67 | $yaml_chunk .= "$indent-"; |
68 | $ref = ref($value); |
69 | if (!$ref) { |
70 | $yaml_chunk .= " " . &_yaml_value($value) . "\n"; |
71 | } |
72 | else { |
73 | $yaml_chunk .= "\n"; |
74 | $yaml_chunk .= &_yaml_chunk("$indent ", $value); |
75 | } |
76 | } |
77 | } |
78 | else { # assume "HASH" |
79 | if ($values->{_order} && ref($values->{_order}) eq "ARRAY") { |
80 | @allkeys = @{$values->{_order}}; |
81 | $values = { %$values }; |
82 | delete $values->{_order}; |
83 | } |
84 | push(@allkeys, sort keys %$values); |
85 | foreach my $key (@allkeys) { |
86 | next if (!defined $key || $key eq "" || $keyseen{$key}); |
87 | $keyseen{$key} = 1; |
88 | $yaml_chunk .= "$indent$key:"; |
89 | $value = $values->{$key}; |
90 | $ref = ref($value); |
91 | if (!$ref) { |
92 | $yaml_chunk .= " " . &_yaml_value($value) . "\n"; |
93 | } |
94 | else { |
95 | $yaml_chunk .= "\n"; |
96 | $yaml_chunk .= &_yaml_chunk("$indent ", $value); |
97 | } |
98 | } |
99 | } |
100 | return($yaml_chunk); |
101 | } |
102 | |
103 | sub _yaml_value { |
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104 | my ($value) = @_; |
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105 | # undefs become ~ |
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106 | return '~' if not defined $value; |
107 | |
f943a5bf |
108 | # empty strings will become empty strings |
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109 | return '""' if $value eq ''; |
110 | |
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111 | # allow simple scalars (without embedded quote chars) to be unquoted |
112 | # (includes $%_+=-\;:,./) |
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113 | return $value if $value !~ /["'`~\n!\@\#^\&\*\(\)\{\}\[\]\|<>\?]/; |
114 | |
115 | # quote and escape strings with special values |
116 | return "'$value'" |
117 | if $value !~ /['`~\n!\#^\&\*\(\)\{\}\[\]\|\?]/; # nothing but " or @ or < or > (email addresses) |
118 | |
119 | $value =~ s/\n/\\n/g; # handle embedded newlines |
120 | $value =~ s/"/\\"/g; # handle embedded quotes |
121 | return qq{"$value"}; |
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122 | } |
123 | |
124 | 1; |
125 | |
126 | __END__ |
127 | |
128 | =head1 NAME |
129 | |
130 | Module::Build::YAML - Provides just enough YAML support so that Module::Build works even if YAML.pm is not installed |
131 | |
132 | =head1 SYNOPSIS |
133 | |
134 | use Module::Build::YAML; |
135 | |
136 | ... |
137 | |
138 | =head1 DESCRIPTION |
139 | |
140 | Provides just enough YAML support so that Module::Build works even if YAML.pm is not installed. |
141 | |
142 | Currently, this amounts to the ability to write META.yml files when "perl Build distmeta" |
143 | is executed via the Dump() and DumpFile() functions/methods. |
144 | |
145 | =head1 AUTHOR |
146 | |
147 | Stephen Adkins <spadkins@gmail.com> |
148 | |
149 | =head1 COPYRIGHT |
150 | |
151 | Copyright (c) 2006. Stephen Adkins. All rights reserved. |
152 | |
153 | This program is free software; you can redistribute it and/or modify it |
154 | under the same terms as Perl itself. |
155 | |
156 | See L<http://www.perl.com/perl/misc/Artistic.html> |
157 | |
158 | =cut |
159 | |