551 lines
12 KiB
Perl
551 lines
12 KiB
Perl
#!/usr/bin/perl
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#
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# Copyright (C) 2001-2021 Graeme Walker <graeme_walker@users.sourceforge.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# ===
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#
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# AutoMakeParser.pm
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#
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# Parser package for parsing automake makefiles, with full variable
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# expansion and support for conditional sections.
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#
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# Synopsis:
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#
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# use AutoMakeParser ;
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# $AutoMakeParser::debug = 0 ;
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# my @makefiles = AutoMakeParser::readall( "." , { FOO => 1 , BAR => 0 } , { A => 'aaa' , B => 'bbb' } ) ;
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# my $makefile = new AutoMakeParser( "Makefile.am" , { FOO => 1 , BAR => 0 } , { A => 'aaa' , B => 'bbb' } ) ;
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# $makefile->path() ;
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# $makefile->keys_() ;
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# $makefile->value("some_VAR") ;
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# $makefile->subdirs() ;
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# $makefile->programs() ;
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# $makefile->libraries() ;
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# $makefile->includes() ;
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# $makefile->definitions() ;
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# $makefile->compile_options() ;
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# $makefile->sources('foo') ;
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# $makefile->our_libs('foo') ;
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# $makefile->sys_libs('foo') ;
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#
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use strict ;
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use FileHandle ;
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use Cwd ;
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use Carp ;
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use File::Basename ;
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package AutoMakeParser ;
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our $debug = 0 ;
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sub new
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{
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my ( $classname , $path , $switches , $vars_in ) = @_ ;
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my %me = (
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m_path => simplepath($path) ,
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m_switches => $switches ,
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m_vars => {} ,
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m_depth => undef , # from readall()
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m_lines => [] ,
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m_stack => [] ,
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) ;
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my $this = bless \%me , $classname ;
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$this->read( $path ) ;
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$this->parse( $path ) ;
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$this->expand_all( $vars_in ) ;
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$this->copy( $vars_in ) ;
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return $this ;
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}
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sub path
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{
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return $_[0]->{m_path} ;
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}
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sub readall
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{
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my ( $base_dir , $switches , $vars , $verbose , $verbose_prefix ) = @_ ;
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my @makefiles = () ;
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_readall_imp( \@makefiles , 0 , $base_dir , $switches , $vars , $verbose , $verbose_prefix ) ; # recursive
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return @makefiles ;
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}
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sub _readall_imp
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{
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my ( $makefiles , $depth , $dir , $switches , $vars , $verbose , $verbose_prefix ) = @_ ;
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$verbose_prefix ||= "" ;
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my $m = new AutoMakeParser( "$dir/Makefile.am" , $switches , $vars ) ;
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$m->{m_depth} = $depth ;
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print "${verbose_prefix}makefile=[" , $m->path() , "] ($depth)\n" if $verbose ;
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push @$makefiles , $m ;
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for my $subdir ( $m->value("SUBDIRS") )
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{
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_readall_imp( $makefiles , $depth+1 , "$dir/$subdir" , $switches , $vars , $verbose , $verbose_prefix ) ;
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}
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}
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sub depth
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{
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# Returns the readall() recursion depth.
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#
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my ( $this ) = @_ ;
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return $this->{m_depth} ;
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}
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sub top
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{
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# Returns the relative path up to the first readall()
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# makefile, which might be different from $(top_srcdir).
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# The returned value will be something like "../../../".
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#
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my ( $this ) = @_ ;
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my $depth = $this->{m_depth} ;
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Carp::confess("bad depth") if ( !defined($depth) || $depth < 0 ) ;
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return $depth == 0 ? "." : ( "../" x $depth ) ;
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}
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sub value
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{
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my ( $this , $key ) = @_ ;
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my $v = $this->{m_vars}->{$key} ;
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return wantarray ? split(' ',$v) : $v ;
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}
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sub keys_
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{
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my ( $this ) = @_ ;
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my @k = sort keys %{$this->{m_vars}} ;
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return wantarray ? @k : join(" ",@k) ;
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}
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sub programs
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{
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my ( $this ) = @_ ;
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return map { $this->value($_) } grep { m/_PROGRAMS$/ } $this->keys_() ;
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}
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sub libraries
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{
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my ( $this ) = @_ ;
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return map { $this->value($_) } grep { m/_LIBRARIES$/ } $this->keys_() ;
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}
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sub subdirs
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{
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my ( $this ) = @_ ;
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return $this->value( "SUBDIRS" ) ;
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}
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sub our_libs
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{
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my ( $this , $program ) = @_ ;
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( my $prefix = $program ) =~ s/[-.]/_/g ;
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return
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map { my $x = File::Basename::basename($_) ; $x =~ s/^lib// ; $x =~ s/\.a$// ; $x }
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grep { my $x = File::Basename::basename($_) ; $x =~ m/^lib.*\.a$/ }
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$this->value( "${prefix}_LDADD" ) ;
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}
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sub sys_libs
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{
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my ( $this , $program ) = @_ ;
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( my $prefix = $program ) =~ s/[-.]/_/g ;
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my @a =
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map { s/-l// ; $_ }
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grep { m/^-l/ }
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$this->value( "LIBS" ) ;
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my @b =
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map { s/-l// ; $_ }
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grep { m/^-l/ }
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$this->value( "${prefix}_LDADD" ) ;
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return ( @a , @b ) ;
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}
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sub sources
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{
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my ( $this , $target ) = @_ ;
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( my $prefix = $target ) =~ s/[-.]/_/g ;
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return
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grep { m/\.c[p]{0,2}$/ }
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$this->value( "${prefix}_SOURCES" ) ;
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}
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sub link_options
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{
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my ( $this ) = @_ ;
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my @a = $this->value( "AM_LDFLAGS" ) ;
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my @b = $this->value( "LDFLAGS" ) ;
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my @options = ( @a , @b ) ;
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return wantarray ? @options : join(" ",@options) ;
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}
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sub compile_options
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{
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my ( $this ) = @_ ;
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my @a = $this->_compile_options_imp( "AM_CPPFLAGS" , $this->{m_vars} ) ;
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my @b = $this->_compile_options_imp( "CXXFLAGS" , $this->{m_vars} ) ;
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my @options = ( @a , @b ) ;
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return wantarray ? @options : join(" ",@options) ;
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}
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sub _compile_options_imp
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{
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my ( $this , $var , $vars ) = @_ ;
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$vars ||= $this->{m_vars} ;
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my $s = protect_quoted_spaces( simple_spaces( $vars->{$var} ) ) ;
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$s =~ s/-D /-D/g ;
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$s =~ s/-I /-I/g ;
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return
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map { s/\t/ /g ; $_ }
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grep { !m/-I/ }
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grep { !m/-D/ }
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split( " " , $s ) ;
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}
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sub definitions
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{
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my ( $this ) = @_ ;
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my @a = $this->_definitions_imp( "AM_CPPFLAGS" , $this->{m_vars} ) ;
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my @b = $this->_definitions_imp( "CXXFLAGS" , $this->{m_vars} ) ;
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my @defs = ( @a , @b ) ;
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return wantarray ? @defs : join(" ",@defs) ;
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}
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sub _definitions_imp
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{
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my ( $this , $var , $vars ) = @_ ;
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my $s = protect_quoted_spaces( simple_spaces( $vars->{$var} ) ) ;
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$s =~ s/-D /-D/g ;
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return
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map { s/\t/ /g ; $_ }
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map { s/-D// ; $_ }
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grep { m/-D\S+/ }
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split( " " , $s ) ;
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}
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sub includes
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{
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# Returns a list of include directories, so for example
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# "-I$(top_srcdir)/one/two -I$(top_srcdir)/three"
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# with the 'top_srcdir' variable defined as "." gives
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# ("./one/two","./three").
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#
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# However, since the 'top_srcdir' expansion is fixed, and
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# relative include paths need to vary through the source
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# tree, a prefix parameter ('top') should be passed in as
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# the current value for expanding "$(top_srcdir)". So then
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# "-I$(top_srcdir)/one/two" becomes "<top>/./one/two".
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# (Absolute paths do not get the 'top' prefixed by 'top'.)
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#
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# The "top()" method provides a candidate for the 'top'
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# parameter but will only work if readall() started at the
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# 'top_srcdir' directory and the 'top_srcdir' variable is
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# defined as ".". Otherwise, a simple approach is to still
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# use top() for the 'top' parameter but define the 'top_srcdir'
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# variable as the difference between the readall() base and
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# the actual 'top_srcdir' directory.
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#
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my ( $this , $top , $full_paths , $no_top_dir ) = @_ ;
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$top ||= "" ;
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my $add_top = !$no_top_dir ;
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my $real_top = simplepath( join( "/" , $this->value("top_srcdir") , $top ) ) ;
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my @a = $this->_includes_imp( $top , "AM_CPPFLAGS" , $this->{m_vars} , $full_paths ) ;
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my @b = $this->_includes_imp( $top , "CXXFLAGS" , $this->{m_vars} , $full_paths ) ;
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my @c = ( $real_top && $add_top ) ? ( $real_top ) : () ;
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my @incs = ( @c , @a , @b ) ;
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return wantarray ? @incs : join(" ",@incs) ;
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}
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sub _includes_imp
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{
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my ( $this , $top , $var , $vars , $full_paths ) = @_ ;
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my $s = protect_quoted_spaces( simple_spaces( $vars->{$var} ) ) ;
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$s =~ s/-I /-I/g ;
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return
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map { $full_paths?$this->fullpath($_):$_ }
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map { simplepath($_) }
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map { my $p=$_ ; ($top&&($p!~m;^/;))?join("/",$top,$p):$p }
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map { s/\t/ /g ; $_ }
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map { s:-I:: ; $_ } grep { m/-I\S+/ }
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split( " " , $s ) ;
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}
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# --
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sub vars
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{
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return $_[0]->{m_vars}
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}
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sub simplepath
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{
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my ( $path ) = @_ ;
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my $first = ( $path =~ m;^/; ) ? "/" : "" ;
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my @out = () ;
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my @split = split( "/" , $path ) ;
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for my $x ( @split )
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{
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next if( $x eq "" || $x eq "." ) ;
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if( $x eq ".." && scalar(@out) && $out[-1] ne ".." )
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{
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pop @out ;
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}
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else
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{
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push @out , $x ;
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}
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}
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return $first . join( "/" , @out ) ;
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}
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sub fullpath
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{
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my ( $this , $relpath ) = @_ ;
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return simplepath( join("/",File::Basename::dirname(Cwd::realpath($this->path())),$relpath) ) ;
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}
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sub simple_spaces
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{
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my ( $s ) = @_ ;
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$s =~ s/\s/ /g ;
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$s =~ s/^ *// ;
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$s =~ s/ *$// ;
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return $s ;
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}
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sub protect_quoted_spaces
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{
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my ( $s , $tab ) = @_ ;
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if( $s =~ m/"/ )
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{
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my @x = split( /"/ , $s ) ;
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if( $s =~ m/"$/ ) { push @x , "" }
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for( my $i = 0 ; $i < scalar(@x) ; $i++ )
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{
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if( ($i%2) == 1 ) { $x[$i] =~ s/ /$tab/g }
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}
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$s = join( '"' , @x ) ;
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}
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return $s ;
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}
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sub size
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{
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my ( $this ) = @_ ;
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return scalar(@{$this->{m_lines}}) ;
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}
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sub empty
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{
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my ( $this ) = @_ ;
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return $this->size() == 0 ;
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}
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sub lastline
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{
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my ( $this ) = @_ ;
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return ${$this->{m_lines}}[-1] ;
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}
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sub continued
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{
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my ( $this ) = @_ ;
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return !$this->empty() && $this->lastline() =~ m/\\\s*$/ ;
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}
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sub continue
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{
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my ( $this , $line ) = @_ ;
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${$this->{m_lines}}[-1] =~ s/\\\s*$// ;
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${$this->{m_lines}}[-1] .= $line ;
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}
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sub add
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{
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my ( $this , $n , $line ) = @_ ;
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while( $this->size() < ($n-3) ) { push @{$this->{m_lines}} , "" }
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push @{$this->{m_lines}} , $line ;
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}
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sub copy
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{
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my ( $this , $vars_in ) = @_ ;
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return if !defined($vars_in) ;
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for my $k ( keys %$vars_in )
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{
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if( !exists($this->{m_vars}->{$k}) )
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{
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$this->{m_vars}->{$k} = $vars_in->{$k} ;
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}
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}
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}
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sub read
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{
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my ( $this , $path ) = @_ ;
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my $fh = new FileHandle( $path ) or die "error: cannot open automake file: [$path]\n" ;
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my $n = 1 ;
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while(<$fh>)
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{
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chomp( my $line = $_ ) ;
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$this->continued() ? $this->continue($line) : $this->add($n,$line) ;
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$n++ ;
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}
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}
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sub parse
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{
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my ( $this ) = @_ ;
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my @handlers = (
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[ qr/^\s*$/ , \&AutoMakeParser::do_blank ] ,
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[ qr/^\s*#/ , \&AutoMakeParser::do_comment ] ,
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[ qr/^\s*(\S+)\s*\+=\s*(.*)/ , \&AutoMakeParser::do_assign_more ] ,
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[ qr/^\s*(\S+)\s*(=|\?=|:=|::=)\s*(.*)/ , \&AutoMakeParser::do_assign ] ,
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[ qr/^\s*if\s+(\S+)/ , \&AutoMakeParser::do_if ] ,
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[ qr/^\s*else\s*$/ , \&AutoMakeParser::do_else ] ,
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[ qr/^\s*endif\s*$/ , \&AutoMakeParser::do_endif ] ,
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) ;
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my $n = 0 ;
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for my $line ( @{$this->{m_lines}} )
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{
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$n++ ;
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for my $h ( @handlers )
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{
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my ( $hre , $hfn ) = @$h ;
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if( $line =~ $hre )
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{
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&{$hfn}( $this , $n , $line , $1 , $2 , $3 , $4 , $5 , $6 ) ;
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last ; # (new)
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}
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}
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debug_( "$$this{m_path}($n): " , $line ) if ( $this->enabled() && ( $line =~ m/\S/ ) && ( $line !~ m/^#/ ) ) ;
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}
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for my $k ( sort keys %{$this->{m_vars}} )
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{
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my $v = $this->{m_vars}->{$k} ;
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debug_( "$$this{m_path}: var: [$k] = [$v]" ) ;
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}
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}
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sub enabled
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{
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my ( $this ) = @_ ;
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my $all = scalar( @{$this->{m_stack}} ) ;
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my $on = scalar( grep { $_ == 1 } @{$this->{m_stack}} ) ;
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return $all == $on ;
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}
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sub expand_all
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{
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my ( $this , $ro_vars ) = @_ ;
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for my $k ( sort keys %{$this->{m_vars}} )
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{
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$this->expand( $k , $ro_vars ) ;
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}
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}
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sub expand
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{
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my ( $this , $k , $ro_vars ) = @_ ;
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my $v = $this->{m_vars}->{$k} ;
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my $vv = $this->expansion( $v , $ro_vars , $k ) ;
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if( $v ne $vv )
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{
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debug_( "$$this{m_path}: expansion: [$k]..." ) ;
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debug_( "$$this{m_path}: expansion: [$v]" ) ;
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debug_( "$$this{m_path}: expansion: [$vv]" ) ;
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}
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$this->{m_vars}->{$k} = $vv ;
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}
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sub expansion
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{
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my ( $this , $v , $ro_vars , $context ) = @_ ;
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while(1)
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{
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my ( $kk ) = ( $v =~ m/\$\(([^)]+)\)/ ) ;
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my $pre = $` ;
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my $post = $' ;
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return $v if !defined($kk) ;
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die "error: $$this{m_path}: $context: no value for expansion of [$kk] in [$v]\n" if( !exists( $this->{m_vars}->{$kk} ) && !exists( $ro_vars->{$kk} ) ) ;
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my $vv = exists($this->{m_vars}->{$kk}) ? $this->{m_vars}->{$kk} : $ro_vars->{$kk} ;
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$v = $pre . $vv . $post ;
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}
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}
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sub do_blank
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{
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my ( $this , $n , $line ) = @_ ;
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}
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sub do_comment
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{
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my ( $this , $n , $line ) = @_ ;
|
|
}
|
|
|
|
sub do_if
|
|
{
|
|
my ( $this , $n , $line , $switch ) = @_ ;
|
|
my $value = ( exists $this->{m_switches}->{$switch} && $this->{m_switches}->{$switch} ) ? 1 : 0 ;
|
|
push @{$this->{m_stack}} , $value ;
|
|
}
|
|
|
|
sub do_else
|
|
{
|
|
my ( $this , $n , $line ) = @_ ;
|
|
die if scalar(@{$this->{m_stack}}) == 0 ;
|
|
${$this->{m_stack}}[-1] = ${$this->{m_stack}}[-1] == 1 ? 0 : 1 ;
|
|
}
|
|
|
|
sub do_endif
|
|
{
|
|
my ( $this , $n , $line ) = @_ ;
|
|
pop @{$this->{m_stack}} ;
|
|
}
|
|
|
|
sub do_assign
|
|
{
|
|
my ( $this , $n , $line , $lhs , $eq , $rhs ) = @_ ;
|
|
if( $this->enabled() )
|
|
{
|
|
$rhs =~ s/\s+/ /g ;
|
|
$rhs =~ s/^\s*// ;
|
|
$rhs =~ s/\s*$// ;
|
|
# TODO if $eq is "?="
|
|
$this->{m_vars}->{$lhs} = $rhs ;
|
|
}
|
|
}
|
|
|
|
sub do_assign_more
|
|
{
|
|
my ( $this , $n , $line , $lhs , $rhs ) = @_ ;
|
|
if( $this->enabled() )
|
|
{
|
|
$rhs =~ s/\s+/ /g ;
|
|
$rhs =~ s/^\s*// ;
|
|
$rhs =~ s/\s*$// ;
|
|
$this->{m_vars}->{$lhs} = join( " " , $this->{m_vars}->{$lhs} , $rhs ) ;
|
|
}
|
|
}
|
|
|
|
sub debug_
|
|
{
|
|
my $line = join( " " , @_ ) ;
|
|
$line =~ s/ *\t */ /g ;
|
|
print $line , "\n" if $debug ;
|
|
}
|
|
|
|
1 ;
|