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|
#!/usr/bin/perl
# $Id$
# compress man and info pages.
use strict;
use warnings;
use Cwd;
use File::Find;
use File::Basename;
my $ext = $ARGV[0] ||= '.gz';
die "Unknown extension $ext" unless $ext =~ /^\.(?:gz|bz2|lzma)$/;
my $buildroot = $ENV{RPM_BUILD_ROOT};
die "No build root defined" unless $buildroot;
die "Invalid build root" unless -d $buildroot;
chdir($buildroot) or die "Can't cd to $buildroot: $!";
my $exclude_pattern = join('|',
map { '(:?' . quotemeta($_) . ')' }
$ENV{EXCLUDE_FROM_COMPRESS} ?
split(' ', $ENV{EXCLUDE_FROM_COMPRESS}) : ()
);
$exclude_pattern = qr/$exclude_pattern/;
# Now the .so conversion.
my (@sofiles, @sodests);
foreach my $dir (qw{usr/man usr/X11R6/man usr/lib/perl5/man}) {
find(\&find_so_man, $dir) if -e $dir;
}
foreach my $sofile (@sofiles) {
my $sodest = shift(@sodests);
system "rm", "-f",$sofile;
system "ln", "-sf",$sodest,$sofile;
}
my @files = split(/\n/, `find usr/info usr/share/info usr/man usr/share/man usr/X11*/man usr/lib/perl5/man -type f ! -name "*.gz" -a ! -name "*.bz2" -a ! -name "*.lzma" ! -name 'dir' ! -name 'whatis' 2>/dev/null || true`);
if ($ext ne '.gz') {
my @gz_files = split(/\n/, `find usr/info usr/share/info usr/man usr/share/man usr/X11*/man usr/lib/perl5/man -type f -name "*.gz" 2>/dev/null || true`);
if (@gz_files) {
xargs(\@gz_files, "gzip", "-d");
die "Something wrong with the decompression of the gzip man/info file"
if $?;
push(@files, map { substr($_, 0, -3) } @gz_files);
}
}
if ($ext ne '.bz2') {
my @bz_files = split(/\n/, `find usr/info usr/share/info usr/man usr/share/man usr/X11*/man usr/lib/perl5/man -type f -name "*.bz2" 2>/dev/null || true`);
if (@bz_files) {
xargs(\@bz_files, "bzip2", "-d");
die "Something wrong with the decompression of the bzip2 man/info file"
if $?;
push(@files, map { substr($_, 0, -4) } @bz_files);
}
}
if ($ext ne '.lzma') {
my @lzma_files = split(/\n/, `find usr/info usr/share/info usr/man usr/share/man usr/X11*/man usr/lib/perl5/man -type f -name "*.lzma" 2>/dev/null || true`);
if (@lzma_files) {
xargs(\@lzma_files, "lzmash", "-d");
die "Something wrong with the decompression of the lzma man/info file"
if $?;
push(@files, map { substr($_, 0, -5) } @lzma_files);
}
}
# Look for files with hard links. If we are going to compress both,
# we can preserve the hard link across the compression and save
# space in the end.
my @f;
my (%hardlinks, %seen);
foreach (@files) {
my ($dev, $inode, undef, $nlink) = stat($_);
if ($nlink > 1) {
if (! $seen{"$inode.$dev"}) {
$seen{"$inode.$dev"} = $_;
push @f, $_;
} else {
# This is a hardlink.
$hardlinks{$_} = $seen{"$inode.$dev"};
}
} else {
push @f, $_;
}
}
if (@f) {
# Make executables not be anymore.
xargs(\@f, "chmod", "a-x");
my @command = $ext eq '.gz' ? qw/gzip -9f/
: $ext eq '.bz2' ? qw/bzip2 -9f/
: $ext eq '.lzma' ? qw/lzma -9f --text/
: qw//
;
xargs(\@f, @command);
}
# Now change over any files we can that used to be hard links so
# they are again.
foreach (keys %hardlinks) {
# Remove old file.
system("rm", "-f", $_);
# Make new hardlink.
system("ln", "$hardlinks{$_}$ext", "$_$ext");
}
# Fix up symlinks that were pointing to the uncompressed files.
my $FIND;
open($FIND, "find $buildroot -type l |");
while (<$FIND>) {
local $_ = $_;
chomp;
my ($directory) = m!(.*)/!;
my $linkval = readlink($_);
if (! -e "$directory/$linkval" && -e "$directory/$linkval$ext") {
system("rm", "-f", $_);
system("ln", "-sf", "$linkval$ext", "$_$ext");
} elsif (! -e "$directory/$linkval" && ! -e "$directory/$linkval$ext" && $directory =~ m|man/|) {
#Bad link go on nowhere (any better idea) ?
unlink($_);
}
}
# Run a command that may have a huge number of arguments, like xargs does.
# Pass in a reference to an array containing the arguments, and then other
# parameters that are the command and any parameters that should be passed to
# it each time.
sub xargs {
my $args = shift;
# The kernel can accept command lines up to 20k worth of characters.
my $command_max = 20000;
# Figure out length of static portion of command.
my $static_length = 0;
foreach (@_) {
$static_length += length($_)+1;
}
my @collect;
my $length = $static_length;
foreach (@$args) {
if (length($_) + 1 + $static_length > $command_max) {
error(qq(This command is greater than the maximum command size allowed by the kernel, and cannot be split up further. What on earth are you doing? "@_ $_"));
}
$length+=length($_) + 1;
if ($length < $command_max) {
push @collect, $_;
} else {
system(@_,@collect) if $#collect > -1;
@collect = $_;
$length = $static_length + length($_) + 1;
}
}
system(@_,@collect) if $#collect > -1;
}
# Check if a file is a .so man page, for use by File::Find.
sub find_so_man() {
# skip symlinks
return if -l $_;
# skip directories
return if -d $_;
# The -s test is becuase a .so file tends to be small. We don't want
# to open every man page. 1024 is arbitrary.
return if -s $_ > 1024;
# skip excluded files
return if $File::Find::name =~ $exclude_pattern;
# Test first line of file for the .so thing.
my $SOTEST;
open($SOTEST, $_);
my $l = <$SOTEST>;
close $SOTEST;
if ($l =~ m/\.so\s+(.*)/) {
my $solink=$1;
# This test is here to prevent links like ... man8/../man8/foo.8
if (basename($File::Find::dir) eq dirname($solink)) {
$solink = basename($solink);
} else {
$solink = "../$solink";
}
push @sofiles, $File::Find::name;
push @sodests, $solink;
}
}
|
