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Diffstat (limited to 'abs/core/perl/provides.pl')
| -rw-r--r-- | abs/core/perl/provides.pl | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/abs/core/perl/provides.pl b/abs/core/perl/provides.pl new file mode 100644 index 0000000..d2cdc76 --- /dev/null +++ b/abs/core/perl/provides.pl @@ -0,0 +1,299 @@ +# provides.pl +## +# Script for printing out a provides list of every CPAN distribution +# that is bundled with perl. You can run it before building perl +# or you can run it after building perl. Required modules are in core +# for perl 5.13 and above. It might be nice if this didn't require +# HTTP::Tiny and maybe just used wget or curl. +# +# This script uses HTTP::Tiny to query Tatsuhiko Miyagawa's webapp at +# cpanmetadb.plackperl.org to cross-reference module files to their +# providing CPAN distribution. Thank you Miyagawa! +# +# - Justin "juster" Davis <jrcd83@gmail.com> + +use warnings 'FATAL' => 'all'; +use strict; + +package Common; + +sub evalver +{ + my ($path, $mod) = @_; + + open my $fh, '<', $path or die "open $path: $!"; + + my $m = ($mod + ? qr/(?:\$${mod}::VERSION|\$VERSION)/ + : qr/\$VERSION/); + + while (my $ln = <$fh>) { + next unless $ln =~ /\s*$m\s*=\s*.+/; + chomp $ln; + my $ver = do { no strict; eval $ln }; + return $ver unless $@; + die qq{$path:$. bad version string in "$ln"\n}; + } + + close $fh; + return undef; +} + + +#----------------------------------------------------------------------------- + +package Dists; + +sub maindistfile +{ + my ($dist, $dir) = @_; + + # libpath is the modern style, installing modules under lib/ + # with dirs matching the name components. + my $libpath = join q{/}, 'lib', split /-/, "${dist}.pm"; + + # dumbpath is an old style where there's no subdirs and just + # a .pm file. + my $dumbpath = $dist; + $dumbpath =~ s/\A.+-//; + $dumbpath .= ".pm"; + + my @paths = ($libpath, $dumbpath); + # Some modules (with simple names like XSLoader, lib, etc) are + # generated by Makefile.PL. Search through their generating code. + push @paths, "${dist}_pm.PL" if $dist =~ tr/-/-/ == 0; + + for my $path (map { "$dir/$_" } @paths) { return $path if -f $path; } + return undef; +} + +sub module_ver +{ + my ($dist, $dir) = @_; + + my $path = maindistfile($dist, $dir) or return undef; + + my $mod = $dist; + $mod =~ s/-/::/g; + my $ver = Common::evalver($path, $mod); + unless ($ver) { + warn "failed to find version in module file for $dist\n"; + return undef; + } + + return $ver; +} + +sub changelog_ver +{ + my ($dist, $dir) = @_; + + my $path; + for my $tmp (glob "$dir/{Changes,ChangeLog}") { + if (-f $tmp) { $path = $tmp; last; } + } + return undef unless $path; + + open my $fh, '<', $path or die "open: $!"; + while (<$fh>) { + return $1 if /\A\s*(?:$dist[ \t]*)?([0-9._]+)/; + return $1 if /\A\s*version\s+([0-9._]+)/i; + } + close $fh; + + return undef; +} + +# for some reason podlators has a VERSION file with perl code in it +sub verfile_ver +{ + my ($dist, $dir) = @_; + + my $path = "$dir/VERSION"; + return undef unless -f $path; # no warning, only podlaters has it + + return Common::evalver($path); +} + +# scans a directory full of nicely separated dist. directories. +sub scan_distroot +{ + my ($distroot) = @_; + opendir my $cpand, "$distroot" or die "failed to open $distroot"; + my @dists = grep { !/^\./ && -d "$distroot/$_" } readdir $cpand; + closedir $cpand; + + my @found; + for my $dist (@dists) { + my $distdir = "$distroot/$dist"; + my $ver = (module_ver($dist, $distdir) + || changelog_ver($dist, $distdir) + || verfile_ver($dist, $distdir)); + + if ($ver) { push @found, [ $dist, $ver ]; } + else { warn "failed to find version for $dist\n"; } + } + return @found; +} + +sub find +{ + my ($srcdir) = @_; + return map { scan_distroot($_) } glob "$srcdir/{cpan,dist}"; +} + +#----------------------------------------------------------------------------- + +package Modules; + +use HTTP::Tiny qw(); +use File::Find qw(); +use File::stat; + +*findfile = *File::Find::find; + +sub cpan_provider +{ + my ($module) = @_; + my $url = "http://cpanmetadb.plackperl.org/v1.0/package/$module"; + my $http = HTTP::Tiny->new; + my $resp = $http->get($url); + return undef unless $resp->{'success'}; + + my ($cpanpath) = $resp->{'content'} =~ /^distfile: (.*)$/m + or return undef; + + my $dist = $cpanpath; + $dist =~ s{\A.+/}{}; # remove author directory + $dist =~ s{-[^-]+\z}{}; # remove version and extension + return ($dist eq 'perl' ? undef : $dist); +} + +sub find +{ + my ($srcdir) = @_; + my $libdir = "$srcdir/lib/"; + die "failed to find $libdir directory" unless -d $libdir; + + # Find only the module files that have not changed since perl + # was extracted. We don't want the files perl just recently + # installed into lib/. We processed those already. + my @modfiles; + my $finder = sub { + return unless /[.]pm\z/; + return if m{\Q$libdir\E[^/]+/t/}; # ignore testing modules + push @modfiles, $_; + }; + findfile({ 'no_chdir' => 1, 'wanted' => $finder }, $libdir); + + # First we have to find what the oldest ctime actually is. + my $oldest = time; + @modfiles = map { + my $modfile = $_; + my $ctime = (stat $modfile)->ctime; + $oldest = $ctime if $ctime < $oldest; + [ $modfile, $ctime ]; # save ctime for later + } @modfiles; + + # Then we filter out any file that was created more than a + # few seconds after that. Process the rest. + my @mods; + for my $modfile (@modfiles) { + my ($mod, $ctime) = @$modfile; + next if $ctime - $oldest > 5; # ignore newer files + + my $path = $mod; + $mod =~ s{[.]pm\z}{}; + $mod =~ s{\A$libdir}{}; + $mod =~ s{/}{::}g; + + my $ver = Common::evalver($path, $mod) || q{}; + push @mods, [ $mod, $ver ]; + } + + # Convert modules names to the dist names who provide them. + my %seen; + my @dists; + for my $modref (@mods) { + my ($mod, $ver) = @$modref; + my $dist = cpan_provider($mod) or next; # filter out core modules + next if $seen{$dist}++; # avoid duplicate dists + push @dists, [ $dist, $ver ]; + } + return @dists; +} + +#----------------------------------------------------------------------------- + +package Dist2Pkg; + +sub name +{ + my ($name) = @_; + my $orig = $name; + + # Package names should be lowercase and consist of alphanumeric + # characters only (and hyphens!)... + $name =~ tr/A-Z/a-z/; + $name =~ tr/_+/-/; # _ and +'s converted to - (ie Tabbed-Text+Wrap) + $name =~ tr/-a-z0-9+//cd; # Delete all other chars. + $name =~ tr/-/-/s; + + # Delete leading or trailing hyphens... + $name =~ s/\A-|-\z//g; + + die qq{Dist. name '$orig' completely violates packaging standards} + unless $name; + + return "perl-$name"; +} + +sub version +{ + my ($version) = @_; + + # Package versions should be numbers and decimal points only... + $version =~ tr/-/./; + $version =~ tr/_0-9.-//cd; + + # Remove developer versions because pacman has no special logic + # to compare them to regular versions like perl does. + $version =~ s/_[^_]+\z//; + + $version =~ tr/_//d; # delete other underscores + $version =~ tr/././s; # only one period at a time + $version =~ s/\A[.]|[.]\z//g; # shouldn't start or stop with a period + + return $version; +} + +#----------------------------------------------------------------------------- + +package main; + +my %CPANNAME = ('List-Util' => 'Scalar-List-Utils', + 'Text-Tabs' => 'Text-Tabs+Wrap', + 'Cwd' => 'PathTools'); + +my $perldir = shift or die "Usage: $0 [path to perl source directory]\n"; +die "$perldir is not a valid directory." unless -d $perldir; + +my @dists = (Dists::find($perldir), Modules::find($perldir)); +for my $dist (@dists) { + my $name = $dist->[0]; + $dist->[0] = $CPANNAME{$name} if exists $CPANNAME{$name}; +} + +my @pkgs = map { + my ($name, $ver) = @$_; + $name = Dist2Pkg::name($name); + $ver = Dist2Pkg::version($ver); + [ $name, $ver ]; +} @dists; + +@pkgs = sort { $a->[0] cmp $b->[0] } @pkgs; + +for my $pkg (@pkgs) { + my ($name, $ver) = @$pkg; + print "$name=$ver\n"; +} |