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package Parse::Deb::Control; |
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=head1 NAME |
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Parse::Deb::Control - parse and manipulate F in a controlable way |
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=head1 SYNOPSIS |
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Print out all "Package:" values lines |
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use Parse::Deb::Control; |
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my $parser = Parse::Deb::Control->new($control_txt); |
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my $parser = Parse::Deb::Control->new(['path', 'to', 'debian', 'control']); |
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my $parser = Parse::Deb::Control->new($fh); |
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foreach my $para ($parser->get_paras('Package')) { |
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print $para->{'Package'}, "\n"; |
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} |
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or |
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foreach my $entry ($parser->get_keys('Package')) { |
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print ${$entry->{'value'}}, "\n"; |
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} |
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Modify "Maintainer:" |
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my $mantainer = 'someone@new'; |
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my $parser = Parse::Deb::Control->new($control_txt); |
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foreach my $para ($parser->get_paras(qw{ Maintainer })) { |
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$para->{'Maintainer'} =~ s/^ (\s*) (\S.*) $/ $maintainer\n/xms; |
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} |
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or |
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my $parser = Parse::Deb::Control->new($control_txt); |
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foreach my $src_pkg ($parser->get_keys(qw{ Maintainer })) { |
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${$src_pkg->{'value'}} =~ s/^ (\s*) (\S.*) $/ $maintainer\n/xms; |
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} |
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and |
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print $parser->control; |
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=head1 DESCRIPTION |
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This modules helps to automate changes in F file. It |
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tries hard to preserve the original structure so that diff on input and |
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output can be made and it will be clear what was changed. There are 2 checks. |
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First when original F file processed it is generated |
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back and compared to the original. The program dies if those two doesn't |
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match. After making changes and creating new file. The result is parsed |
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again and the same check is applied to make sure the file will be still |
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parseable. |
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58
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See also L for alternative. |
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=cut |
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use warnings; |
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use strict; |
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our $VERSION = '0.04'; |
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use base 'Class::Accessor::Fast'; |
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913
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1
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5098
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use Storable 'dclone'; |
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919
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use List::MoreUtils 'any'; |
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1161
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use IO::Any; |
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0
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72
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use Carp; |
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74
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=head1 PROPERTIES |
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_control_src |
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structure |
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=cut |
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81
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__PACKAGE__->mk_accessors(qw{ |
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_control_src |
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structure |
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}); |
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86
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=head1 METHODS |
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88
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=head2 new() |
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90
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Object constructor. Accepts anythign L->read() does to get |
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F from. |
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93
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=cut |
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95
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sub new { |
96
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my $class = shift; |
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my $what = shift || ''; |
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my $self = $class->SUPER::new({}); |
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100
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$self->_control_src(IO::Any->read($what)); |
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102
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return $self; |
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} |
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105
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=head2 content() |
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107
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Returns content of the F. The return value is an array |
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ref holding hashes representing control file paragraphs. |
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110
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=cut |
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112
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sub content { |
113
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my $self = shift; |
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my $content = $self->{'content'}; |
115
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116
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return $content |
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if defined $content; |
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119
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my @structure = (); |
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my @content = (); |
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my $last_value = undef; |
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my $last_para = undef; |
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my $control_txt = ''; |
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125
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my $line_number = 0; |
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my $control_src = $self->_control_src; |
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while (my $line = <$control_src>) { |
128
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$line_number++; |
129
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$control_txt .= $line; |
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131
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# if the line is empty it's the end of control paragraph |
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if ($line =~ /^\s*$/) { |
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$last_value = undef; |
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push @structure, $line; |
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if (defined $last_para) { |
136
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push @content, $last_para; |
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$last_para = undef; |
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} |
139
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next; |
140
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} |
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142
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# line starting with white space |
143
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if ($line =~ /^\s/) { |
144
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die 'not previous value to append "'.$line.'" to (line '.$line_number.')' |
145
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if not defined $last_value; |
146
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${$last_value} .= $line; |
147
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next; |
148
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} |
149
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150
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# line starting with # are comments |
151
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if ($line =~ /^#/) { |
152
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push @structure, $line; |
153
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next; |
154
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} |
155
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156
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# other should be key/value lines |
157
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if ($line =~ /^([^:]+):(.*$)/xms) { |
158
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my ($key, $value) = ($1, $2); |
159
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push @structure, $key; |
160
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$last_para->{$key} = $value; |
161
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$last_value = \($last_para->{$key}); |
162
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next; |
163
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} |
164
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165
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croak 'unrecognized format "'.$line.'" (line '.$line_number.')'; |
166
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} |
167
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push @content, $last_para |
168
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if defined $last_para; |
169
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170
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$self->{'content'} = \@content; |
171
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$self->structure(\@structure); |
172
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173
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# for debugging |
174
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# use File::Slurp 'write_file'; |
175
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# write_file('xxx1', $control_txt); |
176
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# write_file('xxx2', $self->control); |
177
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178
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croak 'control reconstruction failed, send your "control" file attached to bug report :-)' |
179
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if $control_txt ne $self->_control; |
180
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181
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return \@content; |
182
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} |
183
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184
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185
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=head2 control |
186
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187
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Returns text representation of a F constructed from |
188
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C<<$self->content>> and C<<$self->structure>>. |
189
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190
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=cut |
191
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192
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sub control { |
193
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my $self = shift; |
194
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195
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my $control_txt = $self->_control; |
196
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197
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# run through parser again to test if future parsing will be successful |
198
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eval { |
199
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my $parser = Parse::Deb::Control->new($control_txt)->content; |
200
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}; |
201
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if ($@) { |
202
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die 'generating and parsing back failed ("'.$@.'"), this is probably a bug. attach your control file and manipulations you did to the bug report :)' |
203
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} |
204
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205
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return $control_txt; |
206
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} |
207
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208
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sub _control { |
209
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my $self = shift; |
210
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211
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my $control_txt = ''; |
212
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my @content = @{$self->content}; |
213
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return $control_txt |
214
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if not @content; |
215
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216
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my %cur_para = %{shift @content}; |
217
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218
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# loop through the control file structure |
219
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foreach my $structure_key (@{$self->structure}) { |
220
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# just add comment lines |
221
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if ($structure_key =~ /^#/) { |
222
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$control_txt .= $structure_key; |
223
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next; |
224
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} |
225
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226
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if ($structure_key =~ /^\s*$/) { |
227
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# loop throug new keys and add them |
228
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foreach my $key (sort keys %cur_para) { |
229
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$control_txt .= $key.':'.(delete $cur_para{$key}); |
230
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} |
231
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232
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# add the space |
233
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$control_txt .= $structure_key; |
234
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235
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%cur_para = (); |
236
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next; |
237
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} |
238
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239
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# get next paragraph if empty |
240
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%cur_para = %{shift @content} |
241
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if not %cur_para; |
242
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243
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my $value = delete $cur_para{$structure_key}; |
244
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$control_txt .= $structure_key.':'.$value |
245
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if $value; |
246
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} |
247
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|
# loop throug new keys and add them |
248
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foreach my $key (sort keys %cur_para) { |
249
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$control_txt .= $key.':'.(delete $cur_para{$key}); |
250
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} |
251
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252
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return $control_txt; |
253
|
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} |
254
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255
|
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|
=head2 get_keys |
256
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257
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|
Parameters are the requested keys from F. Returns array |
258
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|
|
of key/values of matching keys. Ex. |
259
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260
|
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{ |
261
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|
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|
'key' => 'Package', |
262
|
|
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|
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|
|
'value' => \"perl", |
263
|
|
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|
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|
|
'para' => { ... one item from $self->content array ... }, |
264
|
|
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|
|
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|
} |
265
|
|
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|
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|
266
|
|
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|
|
|
|
Note that value is a pointer to scalar value so that it can be easyly |
267
|
|
|
|
|
|
|
modified if needed. |
268
|
|
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|
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|
|
|
269
|
|
|
|
|
|
|
=cut |
270
|
|
|
|
|
|
|
|
271
|
|
|
|
|
|
|
sub get_keys { |
272
|
|
|
|
|
|
|
my $self = shift; |
273
|
|
|
|
|
|
|
my @wanted = @_; |
274
|
|
|
|
|
|
|
|
275
|
|
|
|
|
|
|
my @content = @{$self->content}; |
276
|
|
|
|
|
|
|
|
277
|
|
|
|
|
|
|
my @wanted_keys; |
278
|
|
|
|
|
|
|
foreach my $para (@content) { |
279
|
|
|
|
|
|
|
foreach my $key (keys %{$para}) { |
280
|
|
|
|
|
|
|
if (any { $_ eq $key } @wanted) { |
281
|
|
|
|
|
|
|
push @wanted_keys, { |
282
|
|
|
|
|
|
|
'key' => $key, |
283
|
|
|
|
|
|
|
'value' => \$para->{$key}, |
284
|
|
|
|
|
|
|
'para' => $para, |
285
|
|
|
|
|
|
|
}; |
286
|
|
|
|
|
|
|
} |
287
|
|
|
|
|
|
|
} |
288
|
|
|
|
|
|
|
} |
289
|
|
|
|
|
|
|
|
290
|
|
|
|
|
|
|
return @wanted_keys; |
291
|
|
|
|
|
|
|
} |
292
|
|
|
|
|
|
|
|
293
|
|
|
|
|
|
|
=head2 get_paras |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
Returns a paragraphs that has key(s) passed as argument. |
296
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
=cut |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
sub get_paras { |
300
|
|
|
|
|
|
|
my $self = shift; |
301
|
|
|
|
|
|
|
my @wanted = @_; |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
my @keys = $self->get_keys(@wanted); |
304
|
|
|
|
|
|
|
return |
305
|
|
|
|
|
|
|
map { $_->{'para'} } |
306
|
|
|
|
|
|
|
@keys |
307
|
|
|
|
|
|
|
; |
308
|
|
|
|
|
|
|
} |
309
|
|
|
|
|
|
|
|
310
|
|
|
|
|
|
|
1; |
311
|
|
|
|
|
|
|
|
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
__END__ |