| 1 |
=head1 NAME |
| 2 |
|
| 3 |
Perl::LibExtractor - determine perl library subsets for building distributions |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use Perl::LibExtractor; |
| 8 |
|
| 9 |
=head1 DESCRIPTION |
| 10 |
|
| 11 |
The purpose of this module is to determine subsets of your perl library, |
| 12 |
that is, a set of files needed to satisfy certain dependencies (e.g. of a |
| 13 |
program). |
| 14 |
|
| 15 |
The goal is to extract a part of your perl installation including |
| 16 |
dependencies. A typical example for this module would be to find out |
| 17 |
which files are needed to be build a L<PAR> distribution, to link into |
| 18 |
an L<App::Staticperl> binary, or to pack with L<Urlader>, to create |
| 19 |
stand-alone distributions tailormade to run your app. |
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|
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=head1 METHODS |
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|
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To use this module, first call the C<new>-constructor and then as many |
| 24 |
other methods as you want, to generate a set of files. |
| 25 |
|
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=over 4 |
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|
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=cut |
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|
| 30 |
package Perl::LibExtractor; |
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|
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our $VERSION = '0.1'; |
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|
| 34 |
use Config; |
| 35 |
use File::Temp (); |
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|
| 37 |
use common::sense; |
| 38 |
|
| 39 |
sub I_SRC () { 0 } |
| 40 |
sub I_DEP () { 1 } |
| 41 |
sub I_FLAGS() { 2 } |
| 42 |
|
| 43 |
sub T_PL () { 1 } |
| 44 |
sub T_PM () { 2 } |
| 45 |
sub T_EXE() { 3 } |
| 46 |
sub T_BIN() { 4 } |
| 47 |
sub T_DLL() { 5 } |
| 48 |
|
| 49 |
sub F_EVAL () { 0x01 } |
| 50 |
sub F_STRIP() { 0x02 } |
| 51 |
|
| 52 |
sub croak($) { |
| 53 |
require Carp; |
| 54 |
Carp::croak "(Perl::LibExtractor) $_[0]"; |
| 55 |
} |
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|
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=item $extractor = new Perl::LibExtractor [key => value...] |
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|
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Creates a new extractor object. Each extractor object stores some |
| 60 |
configuration options and a subset of files that can be queried at any |
| 61 |
time,. |
| 62 |
|
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The following key-value pairs exist, with default values as specified. |
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|
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=over 4 |
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|
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=item exedir => "bin" |
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|
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The prefix to use for the suggested target path for perl |
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executables. Defaults to F<bin>. |
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|
| 72 |
=item libdir => "lib" |
| 73 |
|
| 74 |
The prefix to use for the suggested target path of perl library |
| 75 |
files (F<.pm>, F<.pl>, dynamic objects, autoloader index and files |
| 76 |
etc.). Defaults to F<lib>. |
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|
| 78 |
=item bindir => "bin" |
| 79 |
|
| 80 |
The prefix to use for the suggested target path for (non-perl) |
| 81 |
executables. Defaults to F<bin>. |
| 82 |
|
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=item dlldir => "bin" |
| 84 |
|
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The prefix to use for the suggested target path of any shared |
| 86 |
libraries. Defaults to F<bin>. |
| 87 |
|
| 88 |
=item inc => \@INC without "." |
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|
| 90 |
An arrayref with paths to perl library directories. The default is |
| 91 |
C<\@INC>, with F<.> removed. |
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|
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To prepend custom dirs just do this: |
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|
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inc => ["mydir", @INC], |
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|
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=item use_packlists => 1 |
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|
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Enable (if true) or disable the use of C<.packlists>. If enabled, then |
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each time a module is included, the complete distribution that contains |
| 101 |
it is included as well. See L<ALGORITHMS>, below. |
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|
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=back |
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|
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=cut |
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|
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sub new { |
| 108 |
my ($class, %kv) = @_; |
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|
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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_packlists => 1, |
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%kv, |
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set => {}, |
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}, $class; |
| 120 |
|
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my %inc_seen; |
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my @inc = grep !$inc_seen{$_}++, @{ $self->{inc} }; |
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$self->{inc} = \@inc; |
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|
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$self->_set_inc; |
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|
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$self |
| 128 |
} |
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|
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sub _set_inc { |
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my ($self) = @_; |
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|
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my %lib; |
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|
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# find all files in all libdirs, earlier ones overwrite later ones |
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for my $dir (reverse @{ $self->{inc} }) { |
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my $scan = sub { |
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my $pfx = length $_[1] ? "$_[1]/" : ""; |
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#my (@dirs, @files); |
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|
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for (do { |
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opendir my $fh, "$dir/$_[1]" |
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or croak "$dir/$_[1]: $!"; |
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grep !/^\.\.?$/, readdir $fh |
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}) { |
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if (-d "$dir/$_[1]/$_/.") { |
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#push @dirs, $_; |
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$_[0]($_[0], "$pfx$_"); |
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$lib{"$pfx$_/"} = "$dir/$pfx$_"; |
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} else { |
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#push @files, $_; |
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$lib{"$pfx$_"} = "$dir/$pfx$_"; |
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} |
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} |
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|
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#$lib{"$_[1]/"} = [\@dirs, \@files]; # won't work nice with overwrite |
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}; |
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|
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$scan->($scan, ""); |
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} |
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|
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$self->{lib} = \%lib; |
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|
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my $matchprefix = join "|", map "\Q$_", @{ $self->{inc }}; |
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$self->{matchprefix} = qr<^(?:$matchprefix)/>; |
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} |
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|
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sub _add { |
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my ($self, $add) = @_; |
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|
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my $lib = $self->{lib}; |
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my $path; |
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|
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for (@$add) { |
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$path = "$self->{libdir}/$_"; |
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|
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$self->{set}{$path} ||= do { |
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my @info; |
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|
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$info[I_SRC] = $lib->{$_} |
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or croak "$_: unable to locate file in perl library"; |
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|
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if (/^(.*)\.pm$/) { |
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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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|
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if (exists $lib->{$auto}) { |
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# auto dir exists, scan it for cool stuff |
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|
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# 1. packlists |
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my $pack = "$auto.packlist"; |
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if (my $src = $lib->{$pack} and $self->{use_packlists}) { |
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open my $fh, "<:perlio", $src |
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or croak "$src: $!"; |
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|
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my @files; |
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|
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while (<$fh>) { |
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chomp; |
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s/ .*$//; # newer-style .packlists might contain key=value pairs |
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s%/\./%/%g; # yeah, these too |
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|
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# only include certain files (.al, .ix, .pm, .pl) |
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if (/\.(pm|pl|al|ix|\q$Config{dlext}\E)$/) { |
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s/$self->{matchprefix}// |
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or croak "$_: not found in library directory"; |
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|
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my $src = $lib->{$_} |
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or croak "$_: not found in library directory"; |
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|
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$self->{set}{"$self->{libdir}/$_"} = [$src]; |
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} |
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} |
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|
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goto skip; # packlists are supposed to contain all relevant files, including autoload and .so's |
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} |
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|
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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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|
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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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|
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open my $fh, "<:perlio", $src |
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or croak "$src: $!"; |
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|
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my $package; |
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|
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while (<$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 "$al: autoload file not found, but should be there."; |
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|
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$al = "$self->{libdir}/$al"; |
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push @{ $info[I_DEP] }, $al; $self->{set}{$al} = [$src]; |
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|
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} elsif (/^\s*package\s+([^[:space:];]+)\s*;?\s*$/) { |
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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: $_"; |
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} |
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} |
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} |
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|
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skip: |
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} |
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} |
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|
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\@info |
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}; |
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} |
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} |
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|
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sub _trace { |
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my ($self, $file, $eval) = @_; |
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|
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$self->{trace_begin} .= "#line \"$file\" 1\n$eval;\n"; |
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} |
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|
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sub _trace_flush { |
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my ($self) = @_; |
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|
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return unless exists $self->{trace_begin} or exists $self->{trace_check}; |
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|
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my $tmpdir = newdir File::Temp; |
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my $dir = $tmpdir->dirname; |
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|
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open my $fh, ">:perlio", "$dir/eval" |
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or croak "$dir/eval: $!"; |
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syswrite $fh, |
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'BEGIN { @INC = (' . (join ", ", map "q\x00$_\x00", @{ $self->{inc} }) . ") }\n" |
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. "BEGIN { chdir q\x00$dir\x00 or die q\x00$dir: \$!\x00 }\n" |
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. 'BEGIN { ' . (delete $self->{trace_begin}) . "}\n" |
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. "CHECK {\n" |
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. 'open STDOUT, ">:raw", "out" or die "out: $!";' |
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. 'print join "\x00", values %INC;' |
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. 'open STDERR, ">stderr";' # suppress "syntax OK" message from perl |
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. "}\n" |
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. (delete $self->{trace_check}); |
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close $fh; |
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|
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my $secure_perl_path = $Config{perlpath}; |
| 294 |
|
| 295 |
if ($^O ne 'VMS') { |
| 296 |
$secure_perl_path .= $Config{_exe} |
| 297 |
unless $secure_perl_path =~ m/$Config{_exe}$/i; |
| 298 |
} |
| 299 |
|
| 300 |
system $secure_perl_path, "-c", "$dir/eval" |
| 301 |
and croak "trace failure, check trace process output."; |
| 302 |
|
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my @inc = split /\x00/, do { |
| 304 |
open my $fh, "<:perlio", "$dir/out" |
| 305 |
or croak "$dir/out: $!"; |
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local $/; |
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scalar readline $fh |
| 308 |
}; |
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|
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my $matchprefix = $self->{matchprefix}; |
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|
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# remove the library directory prefix, hope for the best |
| 313 |
s/$matchprefix// |
| 314 |
or croak "$_: file outside any library directory" |
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for @inc; |
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|
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$self->_add (\@inc); |
| 318 |
} |
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|
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=item $extractor->add_mod ($module[, $module...]) |
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|
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Adds the given module(s) to the file set - the module name must be specified |
| 323 |
as in C<use>, i.e. with C<::> as separators and without F<.pm>. |
| 324 |
|
| 325 |
The program will be loaded with the default import list, any dependent |
| 326 |
files, such as the shared object implementing xs functions, or autoload |
| 327 |
files, will also be added. |
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|
| 329 |
Example: add F<Coro.pm> and F<AnyEvent/AIO.pm>, and all relevant files |
| 330 |
from the distribution they are part of. |
| 331 |
|
| 332 |
$extractor->add_mod ("Coro", "AnyEvent::AIO"); |
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|
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=cut |
| 335 |
|
| 336 |
sub add_mod { |
| 337 |
my $self = shift; |
| 338 |
|
| 339 |
my $pkg = "libextractor" . ++$self->{count}; |
| 340 |
|
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$self->_trace ("use $_", "{ package $pkg; use $_ }") |
| 342 |
for @_; |
| 343 |
} |
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|
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=item $extractor->add_exe ($name[, $name...]) |
| 346 |
|
| 347 |
Adds the given (perl) program(s) to the file set, that is, a program |
| 348 |
installed by some perl module, written in perl (an example would be the |
| 349 |
L<perl-libextract> program that is part of the C<Perl::LibExtractor> |
| 350 |
distribution). |
| 351 |
|
| 352 |
Example: add the deliantra client installed by the L<Deliantra::Client> |
| 353 |
module. |
| 354 |
|
| 355 |
$extractor->add_exe ("deliantra"); |
| 356 |
|
| 357 |
=cut |
| 358 |
|
| 359 |
sub add_exe { |
| 360 |
my $self = shift; |
| 361 |
|
| 362 |
exe: |
| 363 |
for my $exe (@_) { |
| 364 |
for my $dir ($Config{sitebinexp}, $Config{vendorbinexp}, $Config{binexp}) { |
| 365 |
if (open my $fh, "<:perlio", "$dir/$exe") { |
| 366 |
|
| 367 |
my $file = do { local $/; readline $fh }; |
| 368 |
|
| 369 |
$self->_trace_flush if exists $self->{trace_check}; |
| 370 |
$self->{trace_check} = $file; |
| 371 |
|
| 372 |
$self->{set}{"$self->{exedir}/$exe"} = ["$dir/$exe"]; |
| 373 |
next exe; |
| 374 |
} |
| 375 |
} |
| 376 |
|
| 377 |
croak "add_exe ($exe): executable not found"; |
| 378 |
} |
| 379 |
} |
| 380 |
|
| 381 |
=item $extractor->add_eval ($string) |
| 382 |
|
| 383 |
Evaluates the string and adds all modules that are loaded by it. For |
| 384 |
example, this would add L<AnyEvent> and the default backend implementation |
| 385 |
module and event loop module: |
| 386 |
|
| 387 |
$extractor->add_eval ("use AnyEvent; AnyEvent::detect"); |
| 388 |
|
| 389 |
=cut |
| 390 |
|
| 391 |
sub add_eval { |
| 392 |
my ($self, $eval) = @_; |
| 393 |
|
| 394 |
$eval =~ s/\x00/\x00."\\x00".q\x00/g; |
| 395 |
$self->_trace ($eval, "eval q\x00$eval\x00 or die;\n"); |
| 396 |
} |
| 397 |
|
| 398 |
=item $extractor->add_perl |
| 399 |
|
| 400 |
Adds the perl binary itself to the file set, including the libperl dll, if |
| 401 |
needed. |
| 402 |
|
| 403 |
=item $extractor->add_unicore_minimal |
| 404 |
|
| 405 |
=item $extractor->add_unicore_all |
| 406 |
|
| 407 |
=item $extractor->add_glob ($modglob[, $modglob...]) |
| 408 |
|
| 409 |
#TODO# |
| 410 |
|
| 411 |
=item $extractor->filter ($pattern[, $pattern...]) |
| 412 |
|
| 413 |
Applies a series of include/exclude filters. Each filter must start |
| 414 |
with either C<+> or C<->, to designate the pattern as I<include> or |
| 415 |
I<exclude> pattern. The rest of the pattern is an extended glob pattern |
| 416 |
(see L<EXTENDED GLOB PATTERNS>). |
| 417 |
|
| 418 |
Each pattern is instantly applied, and all matching files will be |
| 419 |
permanently included or excluded, that is, if you have an include pattern |
| 420 |
then all files that were matched by it will be included in the set, |
| 421 |
regardless of any further exclude patterns matching the same files. |
| 422 |
|
| 423 |
Likewise, any file excluded by a pattern will not be included in the set, |
| 424 |
even if matches by later include patterns. |
| 425 |
|
| 426 |
Any files not matched by any expression will be included, that is, the |
| 427 |
filter list has an implicit C<+/**> pattern at the end. |
| 428 |
|
| 429 |
#TODO# |
| 430 |
|
| 431 |
=item $extractor->add_auto |
| 432 |
|
| 433 |
#todo, not like this |
| 434 |
|
| 435 |
=back |
| 436 |
|
| 437 |
=head1 ALGORITHMS |
| 438 |
#TODO |
| 439 |
|
| 440 |
=head2 Module/trace-based additions |
| 441 |
#TODO |
| 442 |
|
| 443 |
For example, when using L<Coro::AnyEvent> or |
| 444 |
L<AnyEvent::DNS> are added, then also all (relevant) files from the |
| 445 |
L<Coro> and L<AnyEvent> distributions will be included. |
| 446 |
|
| 447 |
The only exception is perl itself |
| 448 |
|
| 449 |
=head2 Glob/path-based modifications |
| 450 |
#TODO |
| 451 |
|
| 452 |
=head1 EXTENDED GLOB PATTERNS |
| 453 |
|
| 454 |
=head1 SEE ALSO |
| 455 |
|
| 456 |
The utility program that comes with this module: L<perl-libextract>. |
| 457 |
|
| 458 |
L<App::Staticperl>, L<Urlader>, L<Perl::Squish>. |
| 459 |
|
| 460 |
=head1 AUTHOR |
| 461 |
|
| 462 |
Marc Lehmann <schmorp@schmorp.de> |
| 463 |
http://home.schmorp.de/ |
| 464 |
|
| 465 |
=cut |
| 466 |
|
| 467 |
1; |
| 468 |
|
