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automake-1.16
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Options.pm
# Copyright (C) 2003-2018 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 <https://www.gnu.org/licenses/>. package Automake::Options; use 5.006; use strict; use Exporter; use Automake::Config; use Automake::ChannelDefs; use Automake::Channels; use Automake::Version; use vars qw (@ISA @EXPORT); @ISA = qw (Exporter); @EXPORT = qw (option global_option set_option set_global_option unset_option unset_global_option process_option_list process_global_option_list set_strictness $strictness $strictness_name &FOREIGN &GNU &GNITS); =head1 NAME Automake::Options - keep track of Automake options =head1 SYNOPSIS use Automake::Options; # Option lookup and setting. $opt = option 'name'; $opt = global_option 'name'; set_option 'name', 'value'; set_global_option 'name', 'value'; unset_option 'name'; unset_global_option 'name'; # Batch option setting. process_option_list $location, @names; process_global_option_list $location, @names; # Strictness lookup and setting. set_strictness 'foreign'; set_strictness 'gnu'; set_strictness 'gnits'; if ($strictness >= GNU) { ... } print "$strictness_name\n"; =head1 DESCRIPTION This packages manages Automake's options and strictness settings. Options can be either local or global. Local options are set using an C<AUTOMAKE_OPTIONS> variable in a F<Makefile.am> and apply only to this F<Makefile.am>. Global options are set from the command line or passed as an argument to C<AM_INIT_AUTOMAKE>, they apply to all F<Makefile.am>s. =cut # Values are the Automake::Location of the definition. use vars '%_options'; # From AUTOMAKE_OPTIONS use vars '%_global_options'; # From AM_INIT_AUTOMAKE or the command line. # Whether process_option_list has already been called for the current # Makefile.am. use vars '$_options_processed'; # Whether process_global_option_list has already been called. use vars '$_global_options_processed'; =head2 Constants =over 4 =item FOREIGN =item GNU =item GNITS Strictness constants used as values for C<$strictness>. =back =cut # Constants to define the "strictness" level. use constant FOREIGN => 0; use constant GNU => 1; use constant GNITS => 2; =head2 Variables =over 4 =item C<$strictness> The current strictness. One of C<FOREIGN>, C<GNU>, or C<GNITS>. =item C<$strictness_name> The current strictness name. One of C<'foreign'>, C<'gnu'>, or C<'gnits'>. =back =cut # Strictness levels. use vars qw ($strictness $strictness_name); # Strictness level as set on command line. use vars qw ($_default_strictness $_default_strictness_name); =head2 Functions =over 4 =item C<Automake::Options::reset> Reset the options variables for the next F<Makefile.am>. In other words, this gets rid of all local options in use by the previous F<Makefile.am>. =cut sub reset () { $_options_processed = 0; %_options = %_global_options; # The first time we are run, # remember the current setting as the default. if (defined $_default_strictness) { $strictness = $_default_strictness; $strictness_name = $_default_strictness_name; } else { $_default_strictness = $strictness; $_default_strictness_name = $strictness_name; } } =item C<$value = option ($name)> =item C<$value = global_option ($name)> Query the state of an option. If the option is unset, this returns the empty list. Otherwise it returns the option's value, as set by C<set_option> or C<set_global_option>. Note that C<global_option> should be used only when it is important to make sure an option hasn't been set locally. Otherwise C<option> should be the standard function to check for options (be they global or local). =cut sub option ($) { my ($name) = @_; return () unless defined $_options{$name}; return $_options{$name}; } sub global_option ($) { my ($name) = @_; return () unless defined $_global_options{$name}; return $_global_options{$name}; } =item C<set_option ($name, $value)> =item C<set_global_option ($name, $value)> Set an option. By convention, C<$value> is usually the location of the option definition. =cut sub set_option ($$) { my ($name, $value) = @_; $_options{$name} = $value; } sub set_global_option ($$) { my ($name, $value) = @_; $_global_options{$name} = $value; } =item C<unset_option ($name)> =item C<unset_global_option ($name)> Unset an option. =cut sub unset_option ($) { my ($name) = @_; delete $_options{$name}; } sub unset_global_option ($) { my ($name) = @_; delete $_global_options{$name}; } =item C<process_option_list (@list)> =item C<process_global_option_list (@list)> Process Automake's option lists. C<@list> should be a list of hash references with keys C<option> and C<where>, where C<option> is an option as they occur in C<AUTOMAKE_OPTIONS> or C<AM_INIT_AUTOMAKE>, and C<where> is the location where that option occurred. These functions should be called at most once for each set of options having the same precedence; i.e., do not call it twice for two options from C<AM_INIT_AUTOMAKE>. Return 0 on error, 1 otherwise. =cut # $BOOL # _option_is_from_configure ($OPTION, $WHERE) # ---------------------------------------------- # Check that the $OPTION given in location $WHERE is specified with # AM_INIT_AUTOMAKE, not with AUTOMAKE_OPTIONS. sub _option_is_from_configure ($$) { my ($opt, $where)= @_; return 1 if $where->get =~ /^configure\./; error $where, "option '$opt' can only be used as argument to AM_INIT_AUTOMAKE\n" . "but not in AUTOMAKE_OPTIONS makefile statements"; return 0; } # $BOOL # _is_valid_easy_option ($OPTION) # ------------------------------- # Explicitly recognize valid automake options that require no # special handling by '_process_option_list' below. sub _is_valid_easy_option ($) { my $opt = shift; return scalar grep { $opt eq $_ } qw( check-news color-tests dejagnu dist-bzip2 dist-lzip dist-xz dist-zip info-in-builddir no-define no-dependencies no-dist no-dist-gzip no-exeext no-installinfo no-installman no-texinfo.tex nostdinc readme-alpha serial-tests parallel-tests silent-rules std-options subdir-objects ); } # $BOOL # _process_option_list (\%OPTIONS, @LIST) # ------------------------------------------ # Process a list of options. \%OPTIONS is the hash to fill with options # data. @LIST is a list of options as get passed to public subroutines # process_option_list() and process_global_option_list() (see POD # documentation above). sub _process_option_list (\%@) { my ($options, @list) = @_; my @warnings = (); my $ret = 1; foreach my $h (@list) { local $_ = $h->{'option'}; my $where = $h->{'where'}; $options->{$_} = $where; if ($_ eq 'gnits' || $_ eq 'gnu' || $_ eq 'foreign') { set_strictness ($_); } # TODO: Remove this special check in Automake 3.0. elsif (/^(.*\/)?ansi2knr$/) { # Obsolete (and now removed) de-ANSI-fication support. error ($where, "automatic de-ANSI-fication support has been removed"); $ret = 0; } # TODO: Remove this special check in Automake 3.0. elsif ($_ eq 'cygnus') { error $where, "support for Cygnus-style trees has been removed"; $ret = 0; } # TODO: Remove this special check in Automake 3.0. elsif ($_ eq 'dist-lzma') { error ($where, "support for lzma-compressed distribution " . "archives has been removed"); $ret = 0; } # TODO: Make this a fatal error in Automake 2.0. elsif ($_ eq 'dist-shar') { msg ('obsolete', $where, "support for shar distribution archives is deprecated.\n" . " It will be removed in Automake 2.0"); } # TODO: Make this a fatal error in Automake 2.0. elsif ($_ eq 'dist-tarZ') { msg ('obsolete', $where, "support for distribution archives compressed with " . "legacy program 'compress' is deprecated.\n" . " It will be removed in Automake 2.0"); } elsif (/^filename-length-max=(\d+)$/) { delete $options->{$_}; $options->{'filename-length-max'} = [$_, $1]; } elsif ($_ eq 'tar-v7' || $_ eq 'tar-ustar' || $_ eq 'tar-pax') { if (not _option_is_from_configure ($_, $where)) { $ret = 0; } for my $opt ('tar-v7', 'tar-ustar', 'tar-pax') { next if $opt eq $_ or ! exists $options->{$opt}; error ($where, "options '$_' and '$opt' are mutually exclusive"); $ret = 0; } } elsif (/^\d+\.\d+(?:\.\d+)?[a-z]?(?:-[A-Za-z0-9]+)?$/) { # Got a version number. if (Automake::Version::check ($VERSION, $&)) { error ($where, "require Automake $_, but have $VERSION"); $ret = 0; } } elsif (/^(?:--warnings=|-W)(.*)$/) { my @w = map { { cat => $_, loc => $where} } split (',', $1); push @warnings, @w; } elsif (! _is_valid_easy_option $_) { error ($where, "option '$_' not recognized"); $ret = 0; } } # We process warnings here, so that any explicitly-given warning setting # will take precedence over warning settings defined implicitly by the # strictness. foreach my $w (@warnings) { msg 'unsupported', $w->{'loc'}, "unknown warning category '$w->{'cat'}'" if switch_warning $w->{cat}; } return $ret; } sub process_option_list (@) { prog_error "local options already processed" if $_options_processed; $_options_processed = 1; _process_option_list (%_options, @_); } sub process_global_option_list (@) { prog_error "global options already processed" if $_global_options_processed; $_global_options_processed = 1; _process_option_list (%_global_options, @_); } =item C<set_strictness ($name)> Set the current strictness level. C<$name> should be one of C<'foreign'>, C<'gnu'>, or C<'gnits'>. =cut # Set strictness. sub set_strictness ($) { $strictness_name = $_[0]; Automake::ChannelDefs::set_strictness ($strictness_name); if ($strictness_name eq 'gnu') { $strictness = GNU; } elsif ($strictness_name eq 'gnits') { $strictness = GNITS; } elsif ($strictness_name eq 'foreign') { $strictness = FOREIGN; } else { prog_error "level '$strictness_name' not recognized"; } } 1;
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