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|
#!/usr/bin/perl
#---------------------------------------------------------------
# Project : Linux-Mandrake
# Module : spec-helper
# File : compress_files
# Version : $Id$
# Author : Frederic Lepied
# Created On : Thu Feb 10 08:04:11 2000
# Purpose : compress man and info pages.
#---------------------------------------------------------------
use Cwd;
use File::Find;
################################################################################
# Returns the basename of the argument passed to it.
sub basename {
my $fn=shift;
$fn=~s:^.*/(.*?)$:$1:;
return $fn;
}
################################################################################
# Returns the directory name of the argument passed to it.
sub dirname {
my $fn=shift;
$fn=~s:^(.*)/.*?$:$1:;
return $fn;
}
################################################################################
# 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("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.
my @sofiles;
my @sodests;
sub find_so_man {
# The -s test is becuase a .so file tends to be small. We don't want
# to open every man page. 1024 is arbitrary.
if (! -f $_ || -s $_ > 1024) {
return;
}
# Test first line of file for the .so thing.
open (SOTEST,$_);
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,"$File::Find::dir/$_";
push @sodests,$solink;
}
}
################################################################################
$RPM_BUILD_ROOT=$ENV{RPM_BUILD_ROOT};
chdir($RPM_BUILD_ROOT) || die "Can't cd to $ENV{RPM_BUILD_ROOT}: $!";
# Now the .so conversion.
@sofiles=@sodests=();
foreach $dir (qw{usr/man usr/X11R6/man usr/lib/perl5/man}) {
if (-e "$dir") {
find(\&find_so_man, "$dir");
}
}
foreach $sofile (@sofiles) {
my $sodest=shift(@sodests);
system "rm","-f",$sofile;
system "ln","-sf",$sodest,$sofile;
}
push @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" ! -name 'dir' ! -name 'whatis' 2>/dev/null || true`);
push @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, fix this ASAP" : exec($0);}
# Exclude files from compression.
if (@files && defined($ENV{EXCLUDE_FROM_COMPRESS})) {
@new=();
foreach (@files) {
$ok=1;
foreach $x (split(' ',$ENV{EXCLUDE_FROM_COMPRESS})) {
if (/\Q$x\E/) {
$ok='';
last;
}
}
push @new,$_ if $ok;
}
@files=@new;
}
# Look for files with hard links. If we are going to compress both,
# we can preserve the hard link across the compression and save
# space in the end.
my @f=();
my %hardlinks;
foreach (@files) {
($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, $_;
}
}
if (@f) {
# Make executables not be anymore.
xargs(\@f,"chmod","a-x");
xargs(\@f,"bzip2","-9f");
}
# Now change over any files we can that used to be hard links so
# they are again.
foreach (keys %hardlinks) {
# Remove old file.
system("rm","-f","$_");
# Make new hardlink.
system("ln","$hardlinks{$_}.bz2","$_.bz2");
}
# Fix up symlinks that were pointing to the uncompressed files.
open (FIND,"find usr/man -type l |");
while (<FIND>) {
chomp;
($directory)=m:(.*)/:;
$linkval=readlink($_);
if (! -e "$directory/$linkval" && -e "$directory/$linkval.bz2") {
system("rm","-f",$_);
system("ln","-sf","$linkval.bz2","$_.bz2");
} elsif (! -e "$directory/$linkval" && ! -e "$directory/linkval.bz2" ) {
#Bad link go on nowhere (any better idea) ?
unlink("$_");
}
}
# compress_files ends here
|
