/usr/share/automake-1.14/Automake/VarDef.pm is in automake 1:1.14.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 | # Copyright (C) 2003-2013 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
package Automake::VarDef;
use 5.006;
use strict;
use Carp;
use Automake::ChannelDefs;
use Automake::ItemDef;
require Exporter;
use vars '@ISA', '@EXPORT';
@ISA = qw/Automake::ItemDef Exporter/;
@EXPORT = qw (&VAR_AUTOMAKE &VAR_CONFIGURE &VAR_MAKEFILE
&VAR_ASIS &VAR_PRETTY &VAR_SILENT &VAR_SORTED);
=head1 NAME
Automake::VarDef - a class for variable definitions
=head1 SYNOPSIS
use Automake::VarDef;
use Automake::Location;
# Create a VarDef for a definition such as
# | # any comment
# | foo = bar # more comment
# in Makefile.am
my $loc = new Automake::Location 'Makefile.am:2';
my $def = new Automake::VarDef ('foo', 'bar # more comment',
'# any comment',
$loc, '', VAR_MAKEFILE, VAR_ASIS);
# Appending to a definition.
$def->append ('value to append', 'comment to append');
# Accessors.
my $value = $def->value; # with trailing '#' comments and
# continuation ("\\\n") omitted.
my $value = $def->raw_value; # the real value, as passed to new().
my $comment = $def->comment;
my $location = $def->location;
my $type = $def->type;
my $owner = $def->owner;
my $pretty = $def->pretty;
# Changing owner.
$def->set_owner (VAR_CONFIGURE,
new Automake::Location 'configure.ac:15');
# Marking examined definitions.
$def->set_seen;
my $seen_p = $def->seen;
# Printing a variable for debugging.
print STDERR $def->dump;
=head1 DESCRIPTION
This class gathers data related to one Makefile-variable definition.
=head2 Constants
=over 4
=item C<VAR_AUTOMAKE>, C<VAR_CONFIGURE>, C<VAR_MAKEFILE>
Possible owners for variables. A variable can be defined
by Automake, in F<configure.ac> (using C<AC_SUBST>), or in
the user's F<Makefile.am>.
=cut
# Defined so that the owner of a variable can only be increased (e.g
# Automake should not override a configure or Makefile variable).
use constant VAR_AUTOMAKE => 0; # Variable defined by Automake.
use constant VAR_CONFIGURE => 1;# Variable defined in configure.ac.
use constant VAR_MAKEFILE => 2; # Variable defined in Makefile.am.
=item C<VAR_ASIS>, C<VAR_PRETTY>, C<VAR_SILENT>, C<VAR_SORTED>
Possible print styles. C<VAR_ASIS> variables should be output as-is.
C<VAR_PRETTY> variables are wrapped on multiple lines if they cannot
fit on one. C<VAR_SILENT> variables are not output at all. Finally,
C<VAR_SORTED> variables should be sorted and then handled as
C<VAR_PRETTY> variables.
C<VAR_SILENT> variables can also be overridden silently (unlike the
other kinds of variables whose overriding may sometimes produce
warnings).
=cut
# Possible values for pretty.
use constant VAR_ASIS => 0; # Output as-is.
use constant VAR_PRETTY => 1; # Pretty printed on output.
use constant VAR_SILENT => 2; # Not output. (Can also be
# overridden silently.)
use constant VAR_SORTED => 3; # Sorted and pretty-printed.
=back
=head2 Methods
C<VarDef> defines the following methods in addition to those inherited
from L<Automake::ItemDef>.
=over 4
=item C<my $def = new Automake::VarDef ($varname, $value, $comment, $location, $type, $owner, $pretty)>
Create a new Makefile-variable definition. C<$varname> is the name of
the variable being defined and C<$value> its value.
C<$comment> is any comment preceding the definition. (Because
Automake reorders variable definitions in the output, it also tries to
carry comments around.)
C<$location> is the place where the definition occurred, it should be
an instance of L<Automake::Location>.
C<$type> should be C<''> for definitions made with C<=>, and C<':'>
for those made with C<:=>.
C<$owner> specifies who owns the variables, it can be one of
C<VAR_AUTOMAKE>, C<VAR_CONFIGURE>, or C<VAR_MAKEFILE> (see these
definitions).
Finally, C<$pretty> tells how the variable should be output, and can
be one of C<VAR_ASIS>, C<VAR_PRETTY>, or C<VAR_SILENT>, or
C<VAR_SORTED> (see these definitions).
=cut
sub new ($$$$$$$$)
{
my ($class, $var, $value, $comment, $location, $type, $owner, $pretty) = @_;
# A user variable must be set by either '=' or ':=', and later
# promoted to '+='.
if ($owner != VAR_AUTOMAKE && $type eq '+')
{
error $location, "$var must be set with '=' before using '+='";
}
my $self = Automake::ItemDef::new ($class, $comment, $location, $owner);
$self->{'value'} = $value;
$self->{'type'} = $type;
$self->{'pretty'} = $pretty;
$self->{'seen'} = 0;
return $self;
}
=item C<$def-E<gt>append ($value, $comment)>
Append C<$value> and <$comment> to the existing value and comment of
C<$def>. This is normally called on C<+=> definitions.
=cut
sub append ($$$)
{
my ($self, $value, $comment) = @_;
$self->{'comment'} .= $comment;
my $val = $self->{'value'};
# Strip comments from augmented variables. This is so that
# VAR = foo # com
# VAR += bar
# does not become
# VAR = foo # com bar
# Furthermore keeping '#' would not be portable if the variable is
# output on multiple lines.
$val =~ s/ ?#.*//;
# Insert a separator, if required.
$val .= ' ' if $val;
$self->{'value'} = $val . $value;
# Turn ASIS appended variables into PRETTY variables. This is to
# cope with 'make' implementation that cannot read very long lines.
$self->{'pretty'} = VAR_PRETTY if $self->{'pretty'} == VAR_ASIS;
}
=item C<$def-E<gt>value>
=item C<$def-E<gt>raw_value>
=item C<$def-E<gt>type>
=item C<$def-E<gt>pretty>
Accessors to the various constituents of a C<VarDef>. See the
documentation of C<new>'s arguments for a description of these.
=cut
sub value ($)
{
my ($self) = @_;
my $val = $self->raw_value;
# Strip anything past '#'. '#' characters cannot be escaped
# in Makefiles, so we don't have to be smart.
$val =~ s/#.*$//s;
# Strip backslashes.
$val =~ s/\\$/ /mg;
return $val;
}
sub raw_value ($)
{
my ($self) = @_;
return $self->{'value'};
}
sub type ($)
{
my ($self) = @_;
return $self->{'type'};
}
sub pretty ($)
{
my ($self) = @_;
return $self->{'pretty'};
}
=item C<$def-E<gt>set_owner ($owner, $location)>
Change the owner of a definition. This usually happens because
the user used C<+=> on an Automake variable, so (s)he now owns
the content. C<$location> should be an instance of L<Automake::Location>
indicating where the change took place.
=cut
sub set_owner ($$$)
{
my ($self, $owner, $location) = @_;
# We always adjust the location when the owner changes (even for
# '+=' statements). The risk otherwise is to warn about
# a VAR_MAKEFILE variable and locate it in configure.ac...
$self->{'owner'} = $owner;
$self->{'location'} = $location;
}
=item C<$def-E<gt>set_seen>
=item C<$bool = $def-E<gt>seen>
These function allows Automake to mark (C<set_seen>) variable that
it has examined in some way, and latter check (using C<seen>) for
unused variables. Unused variables usually indicate typos.
=cut
sub set_seen ($)
{
my ($self) = @_;
$self->{'seen'} = 1;
}
sub seen ($)
{
my ($self) = @_;
return $self->{'seen'};
}
=item C<$str = $def-E<gt>dump>
Format the contents of C<$def> as a human-readable string,
for debugging.
=cut
sub dump ($)
{
my ($self) = @_;
my $owner = $self->owner;
if ($owner == VAR_AUTOMAKE)
{
$owner = 'Automake';
}
elsif ($owner == VAR_CONFIGURE)
{
$owner = 'Configure';
}
elsif ($owner == VAR_MAKEFILE)
{
$owner = 'Makefile';
}
else
{
prog_error ("unexpected owner");
}
my $where = $self->location->dump;
my $comment = $self->comment;
my $value = $self->raw_value;
my $type = $self->type;
return "{
type: $type=
where: $where comment: $comment
value: $value
owner: $owner
}\n";
}
=back
=head1 SEE ALSO
L<Automake::Variable>, L<Automake::ItemDef>.
=cut
1;
### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
|