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=head1 NAME |
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Perl::LibExtractor - determine perl library subsets for building distributions |
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=head1 SYNOPSIS |
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use Perl::LibExtractor; |
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=head1 DESCRIPTION |
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The purpose of this module is to determine subsets of your perl library, |
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that is, a set of files needed to satisfy certain dependencies (e.g. of a |
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program). |
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The goal is to extract a part of your perl installation including |
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dependencies. A typical use case for this module would be to find out |
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which files are needed to be build a L<PAR> distribution, to link into |
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an L<App::Staticperl> binary, or to pack with L<Urlader>, to create |
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stand-alone distributions tailormade to run your app. |
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=head1 METHODS |
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To use this module, first call the C<new>-constructor and then as many |
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other methods as you want, to generate a set of files. Then query the set |
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of files and do whatever you want with them. |
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The command-line utility F<perl-libextract> can be a convenient |
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alternative to using this module directly, and offers a few extra options, |
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such as to copy out the files into a new directory, strip them and/or |
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manipulate them in other ways. |
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=cut |
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package Perl::LibExtractor; |
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our $VERSION = '0.1'; |
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use Config; |
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use File::Spec (); |
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use File::Temp (); |
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use common::sense; |
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sub I_SRC () { 0 } |
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sub I_DEP () { 1 } |
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sub croak($) { |
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require Carp; |
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Carp::croak "(Perl::LibExtractor) $_[0]"; |
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} |
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my $canonpath = File::Spec->can ("canonpath"); |
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my $case_tolerant = File::Spec->case_tolerant; |
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sub canonpath($) { |
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local $_ = $canonpath->(File::Spec::, $_[0]); |
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s%\\%/%g; |
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# $_ = lc if $case_tolerant; # we assume perl file name case is always the same |
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$_ |
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} |
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=head2 CREATION |
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=over 4 |
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=item $extractor = new Perl::LibExtractor [key => value...] |
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Creates a new extractor object. Each extractor object stores some |
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configuration options and a subset of files that can be queried at any |
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time,. |
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The following key-value pairs exist, with default values as specified. |
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=over 4 |
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=item exedir => "bin" |
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The prefix to use for the suggested target path for perl executables |
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(scripts). Defaults to F<bin>. |
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=item libdir => "lib" |
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The prefix to use for the suggested target path of perl library |
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files (F<.pm>, F<.pl>, dynamic objects, autoloader index and files |
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etc.). Defaults to F<lib>. |
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=item bindir => "bin" |
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The prefix to use for the suggested target path for (non-perl) |
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executables. Defaults to F<bin>. |
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=item dlldir => "bin" |
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The prefix to use for the suggested target path of any shared |
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libraries. Defaults to F<bin>. |
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=item inc => \@INC without "." |
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An arrayref with paths to perl library directories. The default is |
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C<\@INC>, with F<.> removed. |
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To prepend custom dirs just do this: |
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inc => ["mydir", @INC], |
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=item use_packlist => 1 |
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Enable (if true) or disable the use of C<.packlist> files. If enabled, |
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then each time a file is traced, the complete distribution that contains |
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it is included (but not traced). |
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If disabled, only shared objects and autoload files will be added. |
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=back |
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=cut |
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sub new { |
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my ($class, %kv) = @_; |
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my $self = bless { |
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exedir => "bin", |
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libdir => "lib", |
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bindir => "bin", |
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dlldir => "bin", |
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inc => [grep $_ ne ".", @INC], |
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use_packlist => 1, |
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%kv, |
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set => {}, |
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}, $class; |
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my %inc_seen; |
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my @inc = grep !$inc_seen{$_}++ && -d "$_/.", @{ $self->{inc} }; |
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$self->{inc} = \@inc; |
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$self->_set_inc; |
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$self |
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} |
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sub _perl_path() { |
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my $secure_perl_path = $Config{perlpath}; |
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if ($^O ne 'VMS') { |
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$secure_perl_path .= $Config{_exe} |
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unless $secure_perl_path =~ m/$Config{_exe}$/i; |
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} |
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$secure_perl_path |
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} |
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sub _path2match { |
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my $re = join "|", map "\Q$_", @_; |
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$re = "(?:$re)\\/"; |
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$re =~ s%\\[/\\]%[/\\\\]%g; # we support / and \ on all OSes, keep your fingers crossed |
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$case_tolerant |
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? qr<$re>i |
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: qr<$re> |
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} |
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sub _read_packlist { |
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my ($self, $root, $path) = @_; |
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my $lib = $self->{lib}; |
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my @packlist; |
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open my $fh, "<:perlio", "$root/$path" |
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or die "$root/$path: $!"; |
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$root = _path2match $root; |
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while (<$fh>) { |
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chomp; |
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s/ .*$//; # newer-style .packlists might contain key=value pairs |
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s/$root// and exists $lib->{$_} |
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or next; |
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push @packlist, canonpath $_; |
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} |
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\@packlist |
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} |
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sub _set_inc { |
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my ($self) = @_; |
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my $matchprefix = _path2match @{ $self->{inc }}; |
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my %lib; |
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my @packlists; |
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# find all files in all libdirs, earlier ones overwrite later ones |
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my @scan = map [$_, ""], @{ $self->{inc} }; |
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while (@scan) { |
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my ($root, $dir) = @{ pop @scan }; |
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my $pfx = length $dir ? "$dir/" : ""; |
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for (do { |
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opendir my $fh, "$root/$dir" |
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or croak "$root/$dir: $!"; |
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grep !/^\.\.?$/, readdir $fh |
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}) { |
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if (-d "$root/$dir/$_/.") { |
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$lib{"$pfx$_/"} = "$root/$pfx$_"; |
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push @scan, [$root, "$pfx$_"]; |
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} elsif ($_ eq ".packlist" && $pfx =~ m%^auto/%) { |
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push @packlists, [$root, $pfx]; |
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} elsif (/\.bs$/ && $pfx =~ m%^auto/% && !-s "$root/$dir/$_") { |
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# skip empty .bs files |
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# } elsif (/\.(?:pod|h|html)$/) { |
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# # not interested in those |
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} else { |
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#push @files, $_; |
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$lib{"$pfx$_"} = "$root/$pfx$_"; |
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} |
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} |
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#$lib{"$_[1]/"} = [\@dirs, \@files]; # won't work nice with overwrite |
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} |
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my %packlist; |
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# need to go forward here |
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for (@packlists) { |
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my $packlist = $self->_read_packlist ($_->[0], "$_->[1]/.packlist"); |
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$packlist{$_} = $packlist |
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for @$packlist; |
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} |
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$self->{lib} = \%lib; |
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$self->{packlist} = \%packlist; |
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$self->{matchprefix} = $matchprefix; |
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} |
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=back |
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=head2 TRACE/PACKLIST BASED ADDING |
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The following methods add various things to the set of files. |
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Each time a perl file is added, it is scanned by tracing either loading, |
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execution or compiling it, and seeing which other perl modules and |
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libraries have been loaded. |
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For each library file found this way, additional dependencies are added: |
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if packlists are enabled, then all files of the distribution that contains |
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the file will be added. If packlists are disabled, then only shared |
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objects and autoload files for modules will be added. |
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Only files from perl library directories will be added automatically. Any |
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other files (such as manpages or scripts installed in the F<bin> |
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directory) are skipped. |
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If there is an error, such as a module not being found, then this module |
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croaks (as opposed to silently skipping). If you want to add something of |
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which you are not sure it exists, then you can wrap the call into C<eval |
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{}>. In some cases, you can avoid this by executing the code you want |
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to work later using C<add_eval> - see C<add_core_support> for an actual |
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example of this technique. |
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Note that packlists are meant to add files not covered by other |
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mechanisms, such as resource files and other data files loaded directly by |
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a module - they are not meant to add dependencies that are missed because |
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they only happen at runtime. |
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For example, with packlists, when using L<AnyEvent>, then all event loop |
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backends are automatically added as well, but I<not> any event loops |
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(i.e. L<AnyEvent::Impl::POE> is added, but L<POE> itself is not). Without |
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packlists, only the backend that is being used is added (i.e. normally |
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none, as loading AnyEvent does not instantly load any backend). |
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To catch the extra event loop dependencies, you can either initialise |
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AnyEvent so it picks a suitable backend: |
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$extractor->add_eval ("use AnyEvent; AnyEvent::detect"); |
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Or you can directly load the backend modules you plan to use: |
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$extractor->add_mod ("AnyEvent::Impl::EV", "AnyEvent::Impl::Perl"); |
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An example of a program (or module) that has extra resource files is |
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L<Deliantra::Client> - the normal tracing (without packlist usage) will |
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correctly add all submodules, but miss the fonts and textures. By using |
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the packlist, those files are added correctly. |
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=over 4 |
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=cut |
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sub _add { |
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my ($self, $add) = @_; |
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my $lib = $self->{lib}; |
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my $path; |
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for (@$add) { |
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$path = "$self->{libdir}/$_"; |
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$self->{set}{$path} ||= do { |
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my @info; |
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$info[I_SRC] = $lib->{$_} |
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or croak "$_: unable to locate file in perl library"; |
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if ($self->{use_packlist} && exists $self->{packlist}{$_}) { |
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$self->{set}{"$self->{libdir}/$_"} ||= [$self->{lib}{$_} or die] |
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for @{ $self->{packlist}{$_} }; |
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# for (grep /\.pm$/, @{ $self->{packlist}{$_} }) { |
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# s/\.pm$//; |
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# s%/%::%g; |
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# my $pkg = "libextractor" . ++$self->{count}; |
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# $self->add_eval ("{ package $pkg; eval 'use $_' }") |
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# unless $self->{_add_do}{$_}++; |
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# } |
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# |
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# $self->{_add_do}{$_}++ or $self->add_eval ("do q\x00$_\x00") |
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# for grep /\.pl$/, @{ $self->{packlist}{$_} }; |
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} elsif (/^(.*)\.pm$/) { |
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(my $auto = "auto/$1/") =~ s%::%/%g; |
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$auto =~ m%/([^/]+)/$% or die; |
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my $base = $1; |
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if (exists $lib->{$auto}) { |
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# auto dir exists, scan it for cool stuff |
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# 1. shared object, others are of no interest to us |
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my $so = "$auto$base.$Config{dlext}"; |
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if (my $src = $lib->{$so}) { |
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$so = "$self->{libdir}/$so"; |
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push @{ $info[I_DEP] }, $so; $self->{set}{$so} = [$src]; |
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} |
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# 2. autoloader/autosplit |
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my $ix = "${auto}autosplit.ix"; |
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if (my $src = $lib->{$ix}) { |
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$ix = "$self->{libdir}/$ix"; |
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push @{ $info[I_DEP] }, $ix; $self->{set}{$ix} = [$src]; |
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open my $fh, "<:perlio", $src |
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or croak "$src: $!"; |
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my $package; |
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while (<$fh>) { |
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if (/^\s*sub\s+ ([^[:space:];]+) \s* (?:\([^)]*\))? \s*;?\s*$/x) { |
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my $al = "auto/$package/$1.al"; |
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my $src = $lib->{$al} |
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or croak "$al: autoload file not found, but should be there."; |
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$al = "$self->{libdir}/$al"; |
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push @{ $info[I_DEP] }, $al; $self->{set}{$al} = [$src]; |
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} elsif (/^\s*package\s+([^[:space:];]+)\s*;?\s*$/) { |
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($package = $1) =~ s/::/\//g; |
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} elsif (/^\s*(?:#|1?\s*;?\s*$)/) { |
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# nop |
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} else { |
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warn "WARNING: $src: unparsable line, please report: $_"; |
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} |
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} |
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} |
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skip: |
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} |
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} |
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\@info |
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}; |
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} |
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} |
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sub _trace { |
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my ($self, $file, $eval) = @_; |
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1.3 |
$self->{trace_begin} .= "\n#line \"$file\" 1\n$eval;\n"; |
385 |
root |
1.1 |
} |
386 |
|
|
|
387 |
|
|
sub _trace_flush { |
388 |
|
|
my ($self) = @_; |
389 |
|
|
|
390 |
root |
1.3 |
# ->_add might add additional files to trace |
391 |
|
|
while (exists $self->{trace_begin} or exists $self->{trace_check}) { |
392 |
|
|
my $tmpdir = newdir File::Temp; |
393 |
|
|
my $dir = $tmpdir->dirname; |
394 |
|
|
|
395 |
|
|
open my $fh, ">:perlio", "$dir/eval" |
396 |
|
|
or croak "$dir/eval: $!"; |
397 |
|
|
syswrite $fh, |
398 |
|
|
'BEGIN { @INC = (' . (join ", ", map "q\x00$_\x00", @{ $self->{inc} }) . ") }\n" |
399 |
|
|
. "BEGIN { chdir q\x00$dir\x00 or die q\x00$dir: \$!\x00 }\n" |
400 |
|
|
. 'BEGIN { ' . (delete $self->{trace_begin}) . "}\n" |
401 |
|
|
. "CHECK {\n" |
402 |
|
|
. 'open STDOUT, ">:raw", "out" or die "out: $!";' |
403 |
|
|
. 'print join "\x00", values %INC;' |
404 |
|
|
. 'open STDERR, ">stderr";' # suppress "syntax OK" message from perl |
405 |
|
|
. "}\n" |
406 |
|
|
. (delete $self->{trace_check}); |
407 |
|
|
close $fh; |
408 |
|
|
|
409 |
root |
1.4 |
system _perl_path, "-c", "$dir/eval" |
410 |
root |
1.3 |
and croak "trace failure, check trace process output - caught"; |
411 |
root |
1.1 |
|
412 |
root |
1.3 |
my @inc = split /\x00/, do { |
413 |
|
|
open my $fh, "<:perlio", "$dir/out" |
414 |
|
|
or croak "$dir/out: $!"; |
415 |
|
|
local $/; |
416 |
|
|
scalar readline $fh |
417 |
|
|
}; |
418 |
root |
1.1 |
|
419 |
root |
1.3 |
my $matchprefix = $self->{matchprefix}; |
420 |
root |
1.1 |
|
421 |
root |
1.3 |
# remove the library directory prefix, hope for the best |
422 |
|
|
s/$matchprefix// |
423 |
|
|
or croak "$_: file outside any library directory" |
424 |
|
|
for @inc; |
425 |
root |
1.1 |
|
426 |
root |
1.3 |
$self->_add (\@inc); |
427 |
|
|
} |
428 |
root |
1.1 |
} |
429 |
|
|
|
430 |
|
|
=item $extractor->add_mod ($module[, $module...]) |
431 |
|
|
|
432 |
|
|
Adds the given module(s) to the file set - the module name must be specified |
433 |
|
|
as in C<use>, i.e. with C<::> as separators and without F<.pm>. |
434 |
|
|
|
435 |
|
|
The program will be loaded with the default import list, any dependent |
436 |
|
|
files, such as the shared object implementing xs functions, or autoload |
437 |
|
|
files, will also be added. |
438 |
|
|
|
439 |
root |
1.5 |
If you want to use a different import list (for those rare modules wghere |
440 |
|
|
import lists trigger different backend modules to be loaded for example), |
441 |
|
|
you can use C<add_eval> instead: |
442 |
|
|
|
443 |
|
|
$extractor->add_eval ("use Module qw(a b c)"); |
444 |
|
|
|
445 |
root |
1.1 |
Example: add F<Coro.pm> and F<AnyEvent/AIO.pm>, and all relevant files |
446 |
|
|
from the distribution they are part of. |
447 |
|
|
|
448 |
|
|
$extractor->add_mod ("Coro", "AnyEvent::AIO"); |
449 |
|
|
|
450 |
|
|
=cut |
451 |
|
|
|
452 |
|
|
sub add_mod { |
453 |
|
|
my $self = shift; |
454 |
|
|
|
455 |
root |
1.3 |
for (@_) { |
456 |
|
|
my $pkg = "libextractor" . ++$self->{count}; |
457 |
|
|
$self->_trace ("use $_", "{ package $pkg; use $_ }") |
458 |
|
|
unless $self->{add_mod}{$_}++; |
459 |
|
|
} |
460 |
root |
1.1 |
} |
461 |
|
|
|
462 |
root |
1.5 |
=item $extractor->add_script ($name[, $name...]) |
463 |
root |
1.1 |
|
464 |
|
|
Adds the given (perl) program(s) to the file set, that is, a program |
465 |
|
|
installed by some perl module, written in perl (an example would be the |
466 |
|
|
L<perl-libextract> program that is part of the C<Perl::LibExtractor> |
467 |
|
|
distribution). |
468 |
|
|
|
469 |
root |
1.5 |
Example: add the deliantra client program installed by the |
470 |
|
|
L<Deliantra::Client> module. |
471 |
root |
1.1 |
|
472 |
root |
1.5 |
$extractor->add_script ("deliantra"); |
473 |
root |
1.1 |
|
474 |
|
|
=cut |
475 |
|
|
|
476 |
root |
1.5 |
sub add_script { |
477 |
root |
1.1 |
my $self = shift; |
478 |
|
|
|
479 |
|
|
exe: |
480 |
|
|
for my $exe (@_) { |
481 |
|
|
for my $dir ($Config{sitebinexp}, $Config{vendorbinexp}, $Config{binexp}) { |
482 |
|
|
if (open my $fh, "<:perlio", "$dir/$exe") { |
483 |
|
|
|
484 |
|
|
my $file = do { local $/; readline $fh }; |
485 |
|
|
|
486 |
|
|
$self->_trace_flush if exists $self->{trace_check}; |
487 |
|
|
$self->{trace_check} = $file; |
488 |
|
|
|
489 |
root |
1.7 |
$self->{set}{"$self->{bindir}/$exe"} = ["$dir/$exe"]; |
490 |
root |
1.1 |
next exe; |
491 |
|
|
} |
492 |
|
|
} |
493 |
|
|
|
494 |
root |
1.5 |
croak "add_script ($exe): executable not found"; |
495 |
root |
1.1 |
} |
496 |
|
|
} |
497 |
|
|
|
498 |
|
|
=item $extractor->add_eval ($string) |
499 |
|
|
|
500 |
root |
1.5 |
Evaluates the string as perl code and adds all modules that are loaded |
501 |
|
|
by it. For example, this would add L<AnyEvent> and the default backend |
502 |
|
|
implementation module and event loop module: |
503 |
root |
1.1 |
|
504 |
|
|
$extractor->add_eval ("use AnyEvent; AnyEvent::detect"); |
505 |
|
|
|
506 |
root |
1.5 |
Each code snippet will be executed in its own package and under C<use |
507 |
|
|
strict>. |
508 |
|
|
|
509 |
root |
1.1 |
=cut |
510 |
|
|
|
511 |
|
|
sub add_eval { |
512 |
|
|
my ($self, $eval) = @_; |
513 |
|
|
|
514 |
root |
1.5 |
my $pkg = "libextractor" . ++$self->{count}; |
515 |
root |
1.1 |
$eval =~ s/\x00/\x00."\\x00".q\x00/g; |
516 |
root |
1.3 |
$self->_trace ($eval, |
517 |
|
|
"local \$^H = \$^H;" # vvvvvvvvvvvvvvvvvvvv = use strict; use utf8 |
518 |
root |
1.5 |
. "eval q\x00package $pkg; BEGIN { \$^H = \$^H | 0x800600 } $eval\x00; die \"\$\@\" if \$\@;\n" |
519 |
root |
1.3 |
); |
520 |
root |
1.1 |
} |
521 |
|
|
|
522 |
root |
1.5 |
=back |
523 |
|
|
|
524 |
|
|
=head2 OTHER METHODS FOR ADDING FILES |
525 |
|
|
|
526 |
|
|
The following methods add commonly used files that are either not covered |
527 |
|
|
by other methods or add commonly-used dependencies. |
528 |
|
|
|
529 |
|
|
=over 4 |
530 |
|
|
|
531 |
root |
1.1 |
=item $extractor->add_perl |
532 |
|
|
|
533 |
|
|
Adds the perl binary itself to the file set, including the libperl dll, if |
534 |
|
|
needed. |
535 |
|
|
|
536 |
root |
1.5 |
For example, on UNIX systems, this usually adds a F<bin/perl> and possibly |
537 |
|
|
some F<lib/libperl.so.XXX>. |
538 |
|
|
|
539 |
root |
1.4 |
=cut |
540 |
|
|
|
541 |
|
|
sub add_perl { |
542 |
|
|
my ($self) = @_; |
543 |
|
|
|
544 |
root |
1.7 |
$self->{set}{"$self->{exedir}/perl$Config{_exe}"} = [_perl_path]; |
545 |
root |
1.4 |
|
546 |
|
|
# on debian, we have the special case of a perl binary linked against |
547 |
|
|
# a static libperl.a (which is not available), but the Config says to use |
548 |
|
|
# a shared library, which is in the wrong directory, too (which breaks |
549 |
|
|
# every other perl installation on the system - they are so stupid). |
550 |
|
|
|
551 |
|
|
# that means we can't find the libperl.so, because dbeian actively breaks |
552 |
|
|
# their perl install, and we don't need it. we work around this by silently |
553 |
|
|
# not including the libperl if we cannot find it. |
554 |
|
|
|
555 |
|
|
if ($Config{useshrplib} eq "true") { |
556 |
root |
1.8 |
my ($libperl, $libpath); |
557 |
|
|
|
558 |
|
|
if ($^O eq "cygwin") { |
559 |
|
|
$libperl = $Config{libperl}; |
560 |
|
|
$libpath = "$Config{binexp}/$libperl"; |
561 |
|
|
} elsif ($^O eq "MSWin32") { |
562 |
|
|
($libperl = $Config{libperl}) =~ s/\Q$Config{_a}\E$/.$Config{so}/; |
563 |
|
|
$libpath = "$Config{binexp}/$libperl"; |
564 |
|
|
} else { |
565 |
|
|
$libperl = $Config{libperl}; |
566 |
|
|
$libpath = $self->{lib}{"CORE/$libperl"}; |
567 |
root |
1.4 |
} |
568 |
root |
1.8 |
|
569 |
|
|
$self->{set}{"$self->{dlldir}/$libperl"} = $libpath |
570 |
|
|
if length $libpath && -e $libpath; |
571 |
root |
1.4 |
} |
572 |
|
|
} |
573 |
root |
1.3 |
|
574 |
|
|
=item $extractor->add_core_support |
575 |
|
|
|
576 |
|
|
Try to add modules and files needed to support commonly-used builtin |
577 |
|
|
language features. For example to open a scalar for I/O you need the |
578 |
|
|
L<PerlIO::scalar> module: |
579 |
|
|
|
580 |
|
|
open $fh, "<", \$scalar |
581 |
|
|
|
582 |
|
|
A number of regex and string features (e.g. C<ucfirst>) need some unicore |
583 |
|
|
files, e.g.: |
584 |
|
|
|
585 |
|
|
'my $x = chr 1234; "\u$x\U$x\l$x\L$x"; $x =~ /\d|\w|\s|\b|$x/i'; |
586 |
|
|
|
587 |
|
|
This call adds these files (simply by executing code similar to the above |
588 |
|
|
code fragments). |
589 |
|
|
|
590 |
|
|
Notable things that are missing are other PerlIO layers, such as |
591 |
|
|
L<PerlIO::encoding>, and named character and character class matches. |
592 |
|
|
|
593 |
|
|
=cut |
594 |
|
|
|
595 |
|
|
sub add_core_support { |
596 |
|
|
my ($self) = @_; |
597 |
|
|
|
598 |
|
|
$self->add_eval ('my $v; open my $fh, "<", \$v'); |
599 |
|
|
$self->add_eval ('my $x = chr 1234; "\u$x\U$x\l$x\L$x"; $x =~ /\d|\w|\s|\b|\R|\h|\v|$x/i'); |
600 |
root |
1.10 |
$self->add_eval ('split " ", chr 1234'); # usually covered by the regex above |
601 |
|
|
$self->add_eval ('/\x{1234}(?<a>)\g{a}/') if $] >= 5.010; # usually covered by the regex above |
602 |
root |
1.3 |
} |
603 |
root |
1.1 |
|
604 |
root |
1.3 |
=item $extractor->add_unicore |
605 |
|
|
|
606 |
root |
1.11 |
Adds (hopefully) all files from the unicore database that will ever be |
607 |
root |
1.5 |
needed. |
608 |
|
|
|
609 |
|
|
If you are not sure which unicode character classes and similar unicore |
610 |
|
|
databases you need, and you do not care about an extra one thousand(!) |
611 |
|
|
files comprising 4MB of data, then you can just call this method, which |
612 |
|
|
adds basically all files from perl's unicode database. |
613 |
|
|
|
614 |
root |
1.11 |
Note that C<add_core_support> also adds some unicore files, but it's not a |
615 |
|
|
subset of C<add_unicore> - the former adds all files neccessary to support |
616 |
|
|
core builtins (which includes some unicore files and other things), while |
617 |
|
|
the latter adds all unicore files (but nothing else). |
618 |
|
|
|
619 |
|
|
When in doubt, use both. |
620 |
|
|
|
621 |
root |
1.5 |
=cut |
622 |
|
|
|
623 |
|
|
sub add_unicore { |
624 |
|
|
my ($self) = @_; |
625 |
|
|
|
626 |
|
|
$self->_add ([grep m%^unicore/.*\.pl$%, keys %{ $self->{lib} }]); |
627 |
|
|
} |
628 |
|
|
|
629 |
root |
1.11 |
=item $extractor->add_core |
630 |
|
|
|
631 |
|
|
This adds all files from the perl core distribution, that is, all library |
632 |
|
|
files that come with perl. |
633 |
|
|
|
634 |
|
|
This is a superset of C<add_core_support> and C<add_unicore>. |
635 |
|
|
|
636 |
|
|
This is quite a lot, but on the plus side, you can be sure nothing is |
637 |
|
|
missing. |
638 |
|
|
|
639 |
|
|
This requires a full perl installation - many distributions (Debian |
640 |
|
|
GNU/Linux for example) don't package all library files that perl installs. |
641 |
|
|
|
642 |
|
|
=cut |
643 |
|
|
|
644 |
|
|
sub add_core { |
645 |
|
|
my ($self) = @_; |
646 |
|
|
|
647 |
|
|
my $lib = $self->{lib}; |
648 |
|
|
|
649 |
|
|
for (@{ |
650 |
|
|
$self->_read_packlist ($Config{privlibexp}, ".packlist") |
651 |
|
|
}) { |
652 |
|
|
$self->{set}{$_} ||= [ |
653 |
|
|
"$self->{libdir}/" |
654 |
|
|
. ($lib->{$_} or croak "$_: unable to locate file in perl library") |
655 |
|
|
]; |
656 |
|
|
} |
657 |
|
|
} |
658 |
|
|
|
659 |
root |
1.5 |
=back |
660 |
|
|
|
661 |
|
|
=head2 GLOB-BASED ADDING AND FILTERING |
662 |
root |
1.1 |
|
663 |
root |
1.5 |
These methods add or manipulate files by using glob-based patterns. |
664 |
|
|
|
665 |
|
|
These glob patterns work similarly to glob patterns in the shell: |
666 |
|
|
|
667 |
|
|
=over 4 |
668 |
|
|
|
669 |
|
|
=item / |
670 |
|
|
|
671 |
|
|
A F</> at the start of the pattern interprets the pattern as a file |
672 |
|
|
path inside the file set, almost the same as in the shell. For example, |
673 |
|
|
F</bin/perl*> would match all files whose names starting with F<perl> |
674 |
|
|
inside the F<bin> directory in the set. |
675 |
|
|
|
676 |
|
|
If the F</> is missing, then the pattern is interpreted as a module name |
677 |
|
|
(a F<.pm> file). For example, F<Coro> matches the file F<libdir/Coro.pm> |
678 |
|
|
(where F<libdir> is the perl library directory), while F<Coro::*> would |
679 |
|
|
match F<libdir/Coro/*.pm>. |
680 |
|
|
|
681 |
|
|
=item * |
682 |
|
|
|
683 |
|
|
A single star matches anything inside a single directory component. For |
684 |
|
|
example, F</lib/Coro/*.pm> would match all F<.pm> files inside the |
685 |
|
|
F<lib/Coro/> directory, but not any files deeper in the hierarchy. |
686 |
root |
1.1 |
|
687 |
root |
1.5 |
Another way to look at it is that a single star matches anything but a |
688 |
|
|
slash (F</>). |
689 |
root |
1.1 |
|
690 |
root |
1.5 |
=item ** |
691 |
root |
1.1 |
|
692 |
root |
1.5 |
A double star matches any number of characters in the path, including F</>. |
693 |
root |
1.1 |
|
694 |
root |
1.5 |
For example, F<AnyEvent::**> would match all modules whose names start |
695 |
|
|
with C<AnyEvent::>, no matter how deep in the hierarchy they are. |
696 |
root |
1.1 |
|
697 |
root |
1.5 |
=back |
698 |
root |
1.1 |
|
699 |
root |
1.2 |
=cut |
700 |
|
|
|
701 |
|
|
sub _extglob2re { |
702 |
root |
1.5 |
for (quotemeta $_[1]) { |
703 |
root |
1.2 |
s/\\\*\\\*/.*/g; |
704 |
|
|
s/\\\*/[^\/]*/g; |
705 |
|
|
s/\\\?/[^\/]/g; |
706 |
|
|
|
707 |
|
|
unless (s%^\\/%%) { |
708 |
|
|
s%\\:\\:%/%g; |
709 |
root |
1.5 |
$_ = (quotemeta $_[0]{libdir}) . "/$_\\.pm"; |
710 |
root |
1.2 |
} |
711 |
|
|
|
712 |
|
|
$_ .= '$'; |
713 |
|
|
s/(?: \[\^\/\] | \. ) \*\$$//x; # remove ** at end |
714 |
|
|
|
715 |
|
|
return qr<^$_>s |
716 |
|
|
} |
717 |
|
|
} |
718 |
|
|
|
719 |
root |
1.5 |
=over 4 |
720 |
|
|
|
721 |
|
|
=item $extractor->add_glob ($modglob[, $modglob...]) |
722 |
|
|
|
723 |
|
|
Adds all files from the perl library that match the given glob pattern. |
724 |
|
|
|
725 |
|
|
For example, you could implement C<add_unicore> yourself like this: |
726 |
|
|
|
727 |
|
|
$extractor->add_glob ("/unicore/**.pl"); |
728 |
|
|
|
729 |
|
|
=cut |
730 |
|
|
|
731 |
|
|
sub add_glob { |
732 |
|
|
my $self = shift; |
733 |
|
|
|
734 |
|
|
for (@_) { |
735 |
|
|
my $pat = $self->_extglob2re ($_); |
736 |
|
|
$self->_add ([grep /$pat/, keys %{ $self->{lib} }]); |
737 |
|
|
} |
738 |
|
|
} |
739 |
|
|
|
740 |
|
|
=item $extractor->filter ($pattern[, $pattern...]) |
741 |
|
|
|
742 |
|
|
Applies a series of include/exclude filters. Each filter must start with |
743 |
|
|
either C<+> or C<->, to designate the pattern as I<include> or I<exclude> |
744 |
|
|
pattern. The rest of the pattern is a normal glob pattern. |
745 |
|
|
|
746 |
|
|
An exclude pattern (C<->) instantly removes all matching files from |
747 |
|
|
the set. An include pattern (C<+>) protects matching files from later |
748 |
|
|
removals. |
749 |
|
|
|
750 |
|
|
That is, if you have an include pattern then all files that were matched |
751 |
|
|
by it will be included in the set, regardless of any further exclude |
752 |
|
|
patterns matching the same files. |
753 |
|
|
|
754 |
|
|
Likewise, any file excluded by a pattern will not be included in the set, |
755 |
|
|
even if matched by later include patterns. |
756 |
|
|
|
757 |
|
|
Any files not matched by any expression will simply stay in the set. |
758 |
|
|
|
759 |
|
|
For example, to remove most of the useless autoload functions by the POSIX |
760 |
|
|
module (they either do the same thing as a builtin or always raise an |
761 |
|
|
error), you would use this (assuming a default C<libdir>): |
762 |
|
|
|
763 |
|
|
$extractor->filter ("-/lib/auto/POSIX/*.al"); |
764 |
|
|
|
765 |
|
|
This does not remove all autoload files, only the ones not defined by a |
766 |
|
|
subclass (e.g. it leaves C<POSIX::SigRt::xxx> alone). |
767 |
|
|
|
768 |
|
|
=cut |
769 |
|
|
|
770 |
root |
1.2 |
sub filter { |
771 |
|
|
my ($self, @patterns) = @_; |
772 |
|
|
|
773 |
root |
1.3 |
$self->_trace_flush; |
774 |
|
|
|
775 |
|
|
my $set = $self->{set}; |
776 |
|
|
my %include; |
777 |
root |
1.2 |
|
778 |
|
|
for my $pat (@patterns) { |
779 |
|
|
$pat =~ s/^([+\-])// |
780 |
|
|
or croak "$_: not a valid filter pattern (missing + or - prefix)"; |
781 |
|
|
my $inc = $1 eq "+"; |
782 |
|
|
$pat = $self->_extglob2re ($pat); |
783 |
root |
1.3 |
|
784 |
|
|
my @match = grep /$pat/, keys %$set; |
785 |
|
|
|
786 |
|
|
if ($inc) { |
787 |
|
|
@include{@match} = delete @$set{@match}; |
788 |
|
|
} else { |
789 |
|
|
delete @$set{@{ $_->[I_DEP] }} # remove dependents |
790 |
|
|
for delete @$set{@match}; |
791 |
|
|
} |
792 |
root |
1.2 |
} |
793 |
root |
1.3 |
|
794 |
|
|
my @include = keys %include; |
795 |
|
|
@$set{@include} = delete @include{@include}; |
796 |
root |
1.2 |
} |
797 |
root |
1.1 |
|
798 |
root |
1.3 |
=item $extractor->runtime_only |
799 |
|
|
|
800 |
|
|
This removes all files that are not needed at runtime, such as static |
801 |
|
|
archives, header and other files needed only for compilation of modules, |
802 |
|
|
and pod and html files (which are unlikely to be needed at runtime). |
803 |
root |
1.1 |
|
804 |
root |
1.8 |
This is quite useful when you want to have only files actually needed to |
805 |
root |
1.3 |
execute a program. |
806 |
|
|
|
807 |
|
|
=cut |
808 |
|
|
|
809 |
|
|
sub runtime_only { |
810 |
|
|
my ($self) = @_; |
811 |
|
|
|
812 |
|
|
$self->_trace_flush; |
813 |
|
|
|
814 |
|
|
my $set = $self->{set}; |
815 |
|
|
|
816 |
root |
1.8 |
# delete all static libraries, also windows stuff |
817 |
|
|
delete @$set{ grep m%^\Q$self->{libdir}\E/auto/(?:.+/)?([^\/]+)/\1(?:\Q$Config{_a}\E|\.pdb|\.exp)$%s, keys %$set }; |
818 |
root |
1.3 |
|
819 |
|
|
# delete all extralibs.ld and extralibs.all (no clue what the latter is for) |
820 |
|
|
delete @$set{ grep m%^\Q$self->{libdir}\E/auto/.*/extralibs\.(?:ld|all)$%s, keys %$set }; |
821 |
|
|
|
822 |
|
|
# delete all .pod, .h, .html files (hopefully none of them are used at runtime) |
823 |
root |
1.8 |
delete @$set{ grep m%^\Q$self->{libdir}\E/.*\.(?:pod|h|html)$%s, keys %$set }; |
824 |
root |
1.11 |
|
825 |
|
|
# delete unneeded unicore files |
826 |
|
|
delete @$set{ grep m%^\Q$self->{libdir}\E/unicore/(?:mktables(?:\.lst)?|.*\.txt)$%s, keys %$set }; |
827 |
root |
1.3 |
} |
828 |
root |
1.1 |
|
829 |
|
|
=back |
830 |
|
|
|
831 |
root |
1.5 |
=head2 RESULT SET |
832 |
|
|
|
833 |
|
|
=over 4 |
834 |
root |
1.1 |
|
835 |
root |
1.5 |
=item $set = $extractor->set |
836 |
root |
1.1 |
|
837 |
root |
1.5 |
Returns a hash reference that represents the result set. The hash is the |
838 |
|
|
actual internal storage hash and can only be modified as described below. |
839 |
root |
1.1 |
|
840 |
root |
1.5 |
Each key in the hash is the path inside the set, without a leading slash, |
841 |
|
|
e.g.: |
842 |
root |
1.1 |
|
843 |
root |
1.5 |
bin/perl |
844 |
|
|
lib/unicore/lib/Blk/Superscr.pl |
845 |
|
|
lib/AnyEvent/Impl/EV.pm |
846 |
|
|
|
847 |
|
|
The value is an array reference with mostly unspecified contents, except |
848 |
|
|
the first element, which is the file system path where the actual file can |
849 |
|
|
be found. |
850 |
|
|
|
851 |
|
|
This code snippet lists all files inside the set: |
852 |
|
|
|
853 |
|
|
print "$_\n" |
854 |
|
|
for sort keys %{ $extractor->set }); |
855 |
|
|
|
856 |
|
|
This code fragment prints C<< filesystem_path => set_path >> pairs for all |
857 |
|
|
files in the set: |
858 |
|
|
|
859 |
|
|
my $set = $extractor->set; |
860 |
|
|
while (my ($set,$fspath) = each %$set) { |
861 |
|
|
print "$fspath => $set\n"; |
862 |
|
|
} |
863 |
root |
1.1 |
|
864 |
root |
1.5 |
You can implement your own filtering by asking for the result set with |
865 |
|
|
C<< $extractor->set >>, and then deleting keys from the referenced hash |
866 |
|
|
- since you can ask for the result set at any time you can add things, |
867 |
|
|
filter them out this way, and add additional things. |
868 |
|
|
|
869 |
|
|
=back |
870 |
|
|
|
871 |
|
|
=cut |
872 |
|
|
|
873 |
|
|
sub set { |
874 |
root |
1.6 |
$_[0]->_trace_flush; |
875 |
root |
1.5 |
$_[0]{set} |
876 |
|
|
} |
877 |
|
|
|
878 |
|
|
=head1 EXAMPLE |
879 |
|
|
|
880 |
|
|
To package he deliantra client (L<Deliantra::Client>), finding all |
881 |
|
|
(perl) files needed to run it is a first step. This can be done by using |
882 |
|
|
something like the following code snippet: |
883 |
|
|
|
884 |
|
|
my $ex = new Perl::LibExtractor |
885 |
|
|
exedir => ".", dlldir => ".", |
886 |
|
|
libdir => "pm", bindir => "pm/bin"; |
887 |
|
|
|
888 |
|
|
$ex->add_perl; |
889 |
|
|
$ex->add_core_support; |
890 |
|
|
$ex->add_script ("deliantra"); |
891 |
|
|
$ex->add_mod ("AnyEvent::Impl::EV"); |
892 |
|
|
$ex->add_mod ("AnyEvent::Impl::Perl"); |
893 |
|
|
$ex->add_mod ("Urlader"); |
894 |
|
|
$ex->filter ("-/*/auto/POSIX/**.al"); |
895 |
|
|
$ex->runtime_only; |
896 |
|
|
|
897 |
|
|
Let's first find out about the choice of paths for the subset. The |
898 |
|
|
Deliantra client binary packages use L<Urlader> nowadays, and there it is |
899 |
|
|
convenient to have F<perl> and any shared libraries directly in the root |
900 |
|
|
of the distribution. |
901 |
|
|
|
902 |
|
|
The perl library files are put into a directory named F<pm>, simply |
903 |
|
|
because it's shorter than F<lib>, and in the future, some files might go |
904 |
|
|
into F<lib>. |
905 |
|
|
|
906 |
|
|
And finally, the F<deliantra> script itself is put into the perl library |
907 |
|
|
directory, because it is not run directly - the installed client uses the |
908 |
|
|
system fonts and other resources, while the binary package is supposed |
909 |
|
|
to use the files packaged with it. To achieve this, a wrapper script is |
910 |
|
|
created, called F<run>; which displays a splash screen and configures the |
911 |
|
|
environment. A simplified version of it could look like this: |
912 |
|
|
|
913 |
|
|
@INC = ("pm", "."); # "." required by newer AutoLoader grrrr. |
914 |
|
|
$ENV{PANGO_RC_FILE} = "pango.rc"; |
915 |
|
|
require "bin/deliantra"; |
916 |
|
|
exit 0; |
917 |
|
|
|
918 |
|
|
First it sets the perl library directory to F<pm> and F<.> (the latter |
919 |
|
|
to work around some AutoLoader bugs), so perl uses only the perl library |
920 |
|
|
files that came with the binary package. |
921 |
|
|
|
922 |
|
|
Then it sets some environment variable to override the system default |
923 |
|
|
(which might be incompatible). |
924 |
|
|
|
925 |
|
|
Then it runs the client itself, using C<require>. Since C<require> only |
926 |
|
|
looks in the perl library directory this is the reaosn why the scripts |
927 |
|
|
were put there (of course, since F<.> is also included it doesn't matter, |
928 |
|
|
but I refuse to yield to bugs). |
929 |
|
|
|
930 |
|
|
Finally it exits with a clean status to signal "ok" to Urlader. |
931 |
|
|
|
932 |
|
|
Back to the original C<Perl::LibExtractor> script: after initialising a |
933 |
|
|
new set, the script simply adds the F<perl> interpreter and core support |
934 |
|
|
files (just in case, not all are needed, but some are, and I am too lazy |
935 |
|
|
to find out which ones exactly). |
936 |
|
|
|
937 |
|
|
Then it adds the deliantra executable itself, which in turn adds most of |
938 |
|
|
the required modules. After that, the AnyEvent implementation modules are |
939 |
|
|
added because these dependencies are not picked up automatically. |
940 |
|
|
|
941 |
|
|
The L<Urlader> module is added because the client itself does not depend |
942 |
|
|
on it at all, but the wrapper does. |
943 |
|
|
|
944 |
|
|
At this point, all required files are present, and it's time to slim |
945 |
|
|
down: most of the ueseless POSIX autoloaded functions are removed, |
946 |
|
|
not because they are so big, but because creating files is a costly |
947 |
|
|
operation in itself, so even small fiels have considerable overhead when |
948 |
|
|
unpacking. Then files not required for running the client are removed. |
949 |
|
|
|
950 |
|
|
And that concludes it, the set is now ready. |
951 |
root |
1.1 |
|
952 |
|
|
=head1 SEE ALSO |
953 |
|
|
|
954 |
|
|
The utility program that comes with this module: L<perl-libextract>. |
955 |
|
|
|
956 |
|
|
L<App::Staticperl>, L<Urlader>, L<Perl::Squish>. |
957 |
|
|
|
958 |
root |
1.5 |
=head1 LICENSE |
959 |
|
|
|
960 |
|
|
This software package is licensed under the GPL version 3 or any later |
961 |
|
|
version, see COPYING for details. |
962 |
|
|
|
963 |
|
|
This license does not, of course, apply to any output generated by this |
964 |
|
|
software. |
965 |
|
|
|
966 |
root |
1.1 |
=head1 AUTHOR |
967 |
|
|
|
968 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
969 |
|
|
http://home.schmorp.de/ |
970 |
|
|
|
971 |
|
|
=cut |
972 |
|
|
|
973 |
|
|
1; |
974 |
|
|
|