home *** CD-ROM | disk | FTP | other *** search
- #!/usr/bin/perl -w
-
- =head1 NAME
-
- dh_pysupport - use the python-support framework to handle Python modules
-
- =cut
-
- use strict;
- use File::Find;
- use Debian::Debhelper::Dh_Lib;
-
- =head1 SYNOPSIS
-
- B<dh_pysupport> [S<I<debhelper options>>] [-V I<X.Y>] [-X I<item> [...]] [-n] [S<I<module dirs ...>>]
-
- =head1 DESCRIPTION
-
- dh_pysupport is a debhelper program that will scan your package, detect
- public modules in I</usr/share/python-support> and generate appropriate
- postinst/prerm scripts to byte-compile modules installed there for all
- available python versions.
-
- It will also look for private Python modules and will byte-compile them
- with the current Python version. You may have to list the directories
- containing private Python modules.
-
- If a file named I<debian/pyversions> exists, it is installed in
- I</usr/share/python-support/$PACKAGE/.version>.
-
- Appropriate dependencies on python-support, python and pythonI<X.Y> are
- put in ${python:Depends}. The ${python:Versions} and ${python:Provides}
- optional substitution variables are made available as well.
-
- =head1 OPTIONS
-
- =over 4
-
- =item I<module dirs>
-
- If your package installs private python modules in non-standard directories, you
- can make dh_pysupport check those directories by passing their names on the
- command line. By default, it will check /usr/lib/$PACKAGE,
- /usr/share/$PACKAGE, /usr/lib/games/$PACKAGE and /usr/share/games/$PACKAGE
-
- =item B<-n>, B<--noscripts>
-
- Do not modify postinst/postrm scripts.
-
- =item B<-d>
-
- This option is deprecated.
-
- =item B<-V> I<X.Y>
-
- Force private modules to be bytecompiled with the specific I<X.Y> python version, regardless of the default python version on the system.
-
- =item B<-X> I<item>, B<--exclude=>I<item>
-
- Exclude files that contain "item" anywhere in their filename from being
- taken into account to generate the python dependency. You may use this
- option multiple times to build up a list of things to exclude.
-
- =back
-
- =head1 CONFORMS TO
-
- Python policy as of 2006-08-10
-
- =cut
-
- init();
-
- sub next_minor_version {
- my $version = shift;
- # Handles 2.10 -> 2.11 gracefully
- my @items = split(/\./, $version);
- $items[1] += 1;
- $version = join(".", @items);
- return $version;
- }
-
- # The current default python version
- my $default=`readlink /usr/bin/python`;
- $default =~ s/^python//;
- chomp $default;
-
- # All supported versions
- my $allversions_string=`pysupport-parseversions --all`;
- chomp $allversions_string;
- my @allversions=split " ", $allversions_string;
-
- # Use a specific version for private modules (doesn't affect public modules)
- my $useversion;
- if($dh{V_FLAG_SET}) {
- $useversion = $dh{V_FLAG};
- if (! grep { $_ eq $useversion } @allversions) {
- error("Unknown python version $useversion");
- }
- }
-
- # Always generate dependencies
- my $do_deps=1;
-
- foreach my $package (@{$dh{DOPACKAGES}}) {
- my $tmp = tmpdir($package);
- my $have_pydep=0; # This variable tells whether we have added some dependency
- # on python one way or another.
-
- # 1) Handle public python modules
- # Move them to the python-support directories
- doit (("pysupport-movemodules",$tmp));
- # Then look for what the script found
- foreach my $ps_dir (glob("$tmp/usr/share/python-support/*")) {
- if (-d $ps_dir && ! excludefile($ps_dir)) {
- my $verfile = "debian/pyversions";
- if (-f $verfile) {
- # TODO: debian/package.pyversions ?
- doit("install","-p","-m644",$verfile,"$ps_dir/.version");
- }
- my $ext_dir=$ps_dir;
- $ext_dir =~ s,/usr/share/,/usr/lib/,;
- my $supported;
- if (-d $ext_dir) {
- if (-f "$ps_dir/.version") {
- # Just ignore the .version file when there are extensions.
- # The extensions dictate which versions to handle.
- doit(("rm","-f","$ps_dir/.version"));
- }
- my @provides;
- foreach my $pydir (glob("$ext_dir/python*")) {
- if (-d $pydir && $pydir =~ m/python(\d+).(\d+)/) {
- push @provides, "$1.$2";
- }
- }
- my $a=join ",",@provides;
- error("$ext_dir doesn't contain modules for any supported python version") if (! $a);
- $supported=`echo $a | pysupport-parseversions --minmax`;
- } elsif (-f "$ps_dir/.version") {
- $supported=`pysupport-parseversions --minmax $ps_dir/.version`;
- } else {
- my $doko_versions=`pysupport-parseversions --raw --pycentral debian/control`;
- chomp $doko_versions;
- if ($doko_versions !~ /not found/) {
- print "Compatibility mode: using detected XS-Python-Version.\n";
- complex_doit("echo $doko_versions > $ps_dir/.version");
- $supported=`pysupport-parseversions --minmax --pycentral debian/control`;
- } else {
- $supported=`echo - | pysupport-parseversions --minmax`;
- }
- }
- if ($do_deps) {
- # Generate the provides field
- my @ar=split "\n",$supported;
- my @provides=split " ",$ar[0];
- if ($package =~ /^python-/) {
- foreach my $pyversion (@provides) {
- my $virtual = $package;
- $virtual =~ s/^python-/python$pyversion-/;
- addsubstvar($package, "python:Provides", $virtual);
- }
- }
- my @minmax=split " ",$ar[1];
- my $minversion=$minmax[0];
- if ( grep { $_ eq $default } @provides ) {
- # The default version is in the supported versions
- if ($minversion ne "None") {
- addsubstvar($package, "python:Depends", "python (>= $minversion)");
- $have_pydep=1;
- }
- } elsif ($minversion ne "None") {
- # The default version is less than all supported versions
- addsubstvar($package, "python:Depends", "python (>= $minversion) | python$minversion");
- $have_pydep=1;
- } else {
- error("The default python version is greater than all supported versions");
- }
- my $maxversion=$minmax[1];
- if ($maxversion ne "None") {
- $maxversion = next_minor_version($maxversion);
- addsubstvar($package, "python:Depends", "python (<< $maxversion)");
- $have_pydep=1;
- }
- }
- $ps_dir =~ s/^$tmp//;
- if (! $dh{NOSCRIPTS}) {
- autoscript($package, "postinst", "postinst-python-support", "s,#OPTIONS#,-i,;s,#DIRS#,$ps_dir,");
- autoscript($package, "prerm", "prerm-python-support", "s,#OPTIONS#,-i,;s,#DIRS#,$ps_dir,");
- }
- }
- }
-
- # 2) Look for private python modules
- my @dirs = ("/usr/lib/$package", "/usr/share/$package",
- "/usr/lib/games/$package", "/usr/share/games/$package", @ARGV );
- @dirs = grep -d, map "$tmp$_", @dirs;
- my @dirlist;
- my $have_pyversion=0;
- my $need_pydep=0;
- my $strong_pydep=0;
- my %need_verdep = ();
- foreach (@allversions) {
- $need_verdep{$_} = 0;
- }
- if (@dirs) {
- foreach my $curdir (@dirs) {
- my $has_module = 0;
- my $has_extension = 0;
- find sub {
- return unless -f;
- return if excludefile($File::Find::name);
- if (/.py$/) {
- $has_module=1;
- doit(("rm","-f",$_."c",$_."o"));
- }
- if (/.so$/ && `nm -Du "$_" | grep "U Py_InitModule"`) {
- $has_extension=1;
- }
- }, $curdir ;
- if ( ($has_module or $has_extension) and not grep { $_ eq "$curdir" } @dirlist ) {
- if ( $useversion ) {
- # Create .pyversion to tell update-python-modules for which
- # version to compile
- open(VERFILE, "> $curdir/.pyversion") ||
- error("Can't create $curdir/.pyversion: $!");
- print VERFILE "$useversion\n";
- close(VERFILE);
- $have_pyversion=1;
- $need_verdep{$useversion}=1;
- } else {
- $need_pydep=1;
- $strong_pydep=1 if $has_extension;
- }
- $curdir =~ s%^$tmp%%;
- push @dirlist, "$curdir" if $has_module;
- }
- }
- }
- if (@dirlist) {
- # We have private python modules
- # Use python-support to ensure that they are always
- # byte-compiled for the current version
- mkdir("$tmp/usr/share/python-support");
- open(DIRLIST, "> $tmp/usr/share/python-support/$package.dirs") ||
- error("Can't create $tmp/usr/share/python-support/$package.dirs: $!");
- print DIRLIST map "$_\n", @dirlist;
- close(DIRLIST);
- autoscript($package, "postinst", "postinst-python-support", "s,#OPTIONS#,-b,;s,#DIRS#,$package.dirs,");
- autoscript($package, "prerm", "prerm-python-support", "s,#OPTIONS#,-b,;s,#DIRS#,$package.dirs,");
- }
-
- # 3) Add python-support dependency depending on what we found
- if (-d "$tmp/usr/share/python-support") {
- if ( $have_pyversion ) {
- # .pyversion introduced in 0.4
- addsubstvar($package, "python:Depends", "python-support (>= 0.4) ");
- } elsif (-d "$tmp/usr/lib/python-support") {
- # /usr/lib split introduced in 0.3
- addsubstvar($package, "python:Depends", "python-support (>= 0.3.4) ");
- } else {
- # stateless stuff introduced in 0.2
- addsubstvar($package, "python:Depends", "python-support (>= 0.2) ");
- }
- }
-
- # 4) Look for python scripts
- if ($do_deps) {
- find sub {
- return unless -f and -x;
- return if excludefile($File::Find::name);
- local *F;
- return unless open F, $_;
- if (read F, local $_, 32 and m%^#!\s*/usr/bin/(env\s+)?(python(\d+\.\d+)?)\s%) {
- if ( "python" eq $2 ) {
- $need_pydep=1;
- } elsif (defined $need_verdep{$3}) {
- $need_verdep{$3}=1;
- }
- }
- close F;
- }, $tmp;
- }
-
- # 5) Generate remaining dependencies
- if ($do_deps) {
- foreach (@allversions) {
- if ($need_verdep{$_}) {
- addsubstvar($package, "python:Depends", "python$_");
- }
- }
- if (not $have_pydep) {
- if ($strong_pydep) {
- addsubstvar($package, "python:Depends", "python (>= $default)");
- my $maxversion = next_minor_version($default);
- addsubstvar($package, "python:Depends", "python (<< $maxversion)");
- $have_pydep=1;
- } elsif ($need_pydep and -f "debian/pyversions") {
- my $supported=`pysupport-parseversions --minmax debian/pyversions`;
- my @ar=split "\n",$supported;
- my @minmax=split " ",$ar[1];
- my $minversion=$minmax[0];
- if ($minversion ne "None") {
- addsubstvar($package, "python:Depends", "python (>= $minversion)");
- $have_pydep=1;
- }
- my $maxversion=$minmax[1];
- if ($maxversion ne "None") {
- $maxversion = next_minor_version($maxversion);
- addsubstvar($package, "python:Depends", "python (<< $maxversion)");
- $have_pydep=1;
- }
- }
- }
- # If nothing has added a python dependency yet, add it
- if ($need_pydep and not $have_pydep) {
- addsubstvar($package, "python:Depends", "python");
- }
- }
- }
-
- =head1 SEE ALSO
-
- L<debhelper(7)>
-
- This program is a part of python-support but is made to work with debhelper.
-
- =head1 AUTHORS
-
- Josselin Mouette <joss@debian.org>,
- Raphael Hertzog <hertzog@debian.org>
-
- =cut
-