358 lines
10 KiB
Perl
Executable file
358 lines
10 KiB
Perl
Executable file
#!/usr/bin/perl
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# Copyright (C) 2009 Neil Williams <codehelp@debian.org>
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#
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# This package is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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use Config::Auto;
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use File::Basename;
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use strict;
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use vars qw/ $progname $ourversion %scripts $dstrap $script $extra
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@archives $deb $cachedir $config_str %packages $retval $str $retries
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$dir $include $arch $foreign $suite $url $forceunpack $option %options
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@e $sourcesname $libdir $dpkgdir @debootstrap %suites $mirror $etcdir
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$repo @dirs @touch %sources $section %keys $host $key $value $type
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$file $config /;
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$progname = basename($0);
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while( @ARGV ) {
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$_= shift( @ARGV );
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last if m/^--$/;
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if (!/^-/) {
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unshift(@ARGV,$_);
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last;
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}
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elsif (/^(-\?|-h|--help|--version)$/) {
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&usageversion();
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exit( 0 );
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}
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elsif (/^(-f|--file)$/) {
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$file = shift(@ARGV);
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}
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else {
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die "$progname: Unknown option $_.\n";
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}
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}
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die ("Need a configuration file - use $progname -f\n")
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if (not defined $file);
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$config = Config::Auto::parse("$file");
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%keys=();
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foreach $key (%$config)
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{
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$type = lc($key) if (ref $key ne "HASH");
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$value = $key if (ref $key eq "HASH");
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$keys{$type} = $value;
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}
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%sources=();
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%packages=();
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%suites=();
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%options=();
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%scripts=();
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foreach $section (sort keys %keys)
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{
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if ($section eq "general")
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{
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$arch = $keys{$section}{'arch'};
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$retries = $keys{$section}{'retries'};
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$dir = $keys{$section}{'directory'};
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$forceunpack = lc($keys{$section}{'forceunpack'});
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@debootstrap = split(' ', lc($keys{$section}{'debootstrap'}));
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}
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else
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{
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$sources{$section}=$keys{$section}{'source'};
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$packages{$section}=$keys{$section}{'packages'};
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$suites{$section}=$keys{$section}{'suite'};
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$scripts{$section}=$keys{$section}{'script'};
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$options{$section}=$keys{$section}{'options'};
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}
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}
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$host = `dpkg-architecture -qDEB_BUILD_ARCH`;
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chomp ($host);
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$foreign = ($host ne $arch) ? "--foreign" : '';
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$cachedir = "var/cache/apt/"; # archives
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$libdir = "var/lib/apt/"; # lists
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$etcdir = "etc/apt/"; # sources
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$dpkgdir = "var/lib/dpkg/"; # state
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mkdir ("$dir") if (not -d "$dir");
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system ("mkdir -p ${dir}${cachedir}");
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system ("mkdir -p ${dir}${libdir}");
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system ("mkdir -p ${dir}${dpkgdir}");
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system ("mkdir -p ${dir}etc/apt/sources.list.d/");
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@dirs = qw/ alternatives info parts updates/;
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@touch = qw/ diversion statoverride status lock/;
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foreach my $dpkgd (@dirs) {
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if (not -d "${dir}${dpkgdir}$dpkgd") {
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mkdir "${dir}${dpkgdir}$dpkgd";
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}
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}
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foreach my $file (@touch) {
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utime(time, time, "${dir}${dpkgdir}/$file") or (
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open(F, ">${dir}${dpkgdir}/$file") && close F )
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}
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unlink ("${dir}etc/apt/sources.list.d/sources.list")
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if (-f "${dir}etc/apt/sources.list.d/sources.list");
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unlink ("${dir}etc/apt/sources.list")
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if (-f "${dir}etc/apt/sources.list");
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foreach $repo (sort keys %suites)
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{
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if (not -e "${dir}${cachedir}") {
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mkdir "${dir}${cachedir}";
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}
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if (not -e "$dir/${libdir}lists") {
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mkdir "$dir/${libdir}lists";
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}
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if (not -e "$dir/${libdir}lists/partial") {
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mkdir "$dir/${libdir}lists/partial";
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}
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if (not -e "$dir/${cachedir}archives") {
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mkdir "$dir/${cachedir}archives";
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}
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if (not -e "$dir/${cachedir}archives/partial") {
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mkdir "$dir/${cachedir}archives/partial";
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}
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if (-d "${dir}etc/apt/")
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{
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open (SOURCES, ">>${dir}etc/apt/sources.list.d/sources.list")
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or die "Cannot open sources list $!";
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$mirror = $sources{$repo};
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$suite = $suites{$repo};
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print SOURCES<<END;
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deb $mirror $suite main
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deb-src $mirror $suite main
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END
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close SOURCES;
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}
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}
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$config_str = '';
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$config_str .= " -o Apt::Architecture=$arch";
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$config_str .= " -o Apt::Get::AllowUnauthenticated=true";
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$config_str .= " -o Apt::Get::Download-Only=true";
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$config_str .= " -o Apt::Install-Recommends=false";
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$config_str .= " -o Dir=$dir";
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$config_str .= " -o Dir::Etc=${dir}${etcdir}";
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$sourcesname = "sources.list.d/$repo.sources.list";
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$config_str .= " -o Dir::Etc::SourceList=${dir}${etcdir}$sourcesname";
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$config_str .= " -o Dir::State=${dir}${libdir}";
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$config_str .= " -o Dir::State::Status=${dir}${dpkgdir}/status";
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$config_str .= " -o Dir::Cache=${dir}${cachedir}";
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system ("apt-get $config_str update");
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$str = join (' ', values %packages);
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chomp($str);
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print "apt-get -y $config_str install $str\n";
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$retval = system ("apt-get -y $config_str install $str");
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die ("apt download failed. Exit value: ".($retval/256)."\n")
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if ($retval != 0);
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foreach $dstrap (@debootstrap)
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{
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$url = $sources{$dstrap};
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$suite = $suites{$dstrap};
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$script = $scripts{$dstrap};
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$option = $options{$dstrap};
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$extra = $packages{$dstrap};
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$include = '';
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if (($extra ne '') and ($option !~ /no-resolve-deps/))
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{
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@e = split(' ', $extra);
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$include = "--include ";
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$include .= join (',', @e);
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}
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&write_script ($dstrap);
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$str = "debootstrap $option $include --arch $arch $foreign $suite $dir ";
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$str .= "$url $script";
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print "$str\n";
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$retval = system ($str);
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while ($retval != 0 and $retries > 0)
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{
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print "Problem - trying again, $retries left.\n";
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sleep 1;
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$retval = system ("$str");
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$retries--;
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}
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}
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if ($forceunpack eq "true")
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{
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opendir (DEBS, "${dir}${cachedir}archives/")
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or die ("Cannot read apt archives directory.\n");
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@archives=grep(/.*\.deb$/, readdir DEBS);
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closedir (DEBS);
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chdir ("${dir}");
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foreach $deb (@archives)
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{
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print "Extracting $deb...\n";
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system ("ar -p \"./${cachedir}archives/$deb\" data.tar.gz | zcat | tar -xf -");
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}
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}
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system ("apt-get $config_str update");
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sub write_script
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{
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($dstrap) = @_;
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$extra = $packages{$dstrap};
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$script = $scripts{$dstrap};
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return if ($script eq '');
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open (SCRIPT, ">$script") or die ("Cannot open $script. $!\n");
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print SCRIPT<<END;
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mirror_style release
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download_style apt
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finddebs_style hardcoded
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variants - buildd fakechroot minbase
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work_out_debs () {
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required="$extra"
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}
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first_stage_install () {
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extract \$required
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}
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second_stage_install () {
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info BASESUCCESS "Base system installed successfully."
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}
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END
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close (SCRIPT);
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}
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sub usageversion {
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print(STDERR <<END)
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$progname version $ourversion
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Usage:
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$progname -f CONFIG_FILE
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$progname -?|-h|--help|--version
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Options:
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-f|--file CONFIG_FILE: path the the multistrap configuration file.
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-?|-h|--help: print this usage message and exit
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--version: print this usage message and exit
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$progname extends debootstrap to provide support for multiple
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repositories, using a configuration file to specify the relevant suites,
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debootstrap options, architecture, extra packages and the mirror to use
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for each repository.
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Example configuration:
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[Debian]
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packages=
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source=http://ftp.uk.debian.org/debian
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suite=lenny
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script=
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options=
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This will result in a completely normal debootstrap of Debian lenny from
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the specified mirror.
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Specify a package to extend the debootstap to include that package and
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all dependencies.
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Specify a script only if the suite is not currently supported by
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debootstrap (which in turn are based on Debian and Ubuntu suite names).
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Useful options can include --no-resolve-deps if one of the repositories
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contains packages that are also in any of the other repositories but at
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a lower version. This prevents debootstrap unpacking the older version
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of the duplicated package.
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General settings:
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The order of repositories specified in the debootstrap (under General),
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determines which repository is unpacked first - this is important if one
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repository is incomplete or contains older versions.
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'directory' specifies the top level directory where the debootstrap
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will be created - it is not packed into a .tgz once complete.
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'retries' determines how many times debootstrap should be allowed to
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restart (the same value is used for all repositories) to allow for
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temporary network issues.
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If 'arch' does not match the build architecture (determined using
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`dpkg-architecture -qDEB_BUILD_ARCH`, --foreign is passed to
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each debootstrap.
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END
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|| die "$progname: failed to write usage: $!\n";
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}
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=pod
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=head1 Description
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em_multistrap extends debootstrap to provide support for multiple
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repositories, using a configuration file to specify the relevant suites,
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debootstrap options, architecture, extra packages and the mirror to use
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for each repository.
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Example configuration:
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[General]
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arch=arm
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directory=/opt/emdebian/debootstrap/multistrap/
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retries=5
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# the order of sections is important.
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# debootstraps are unpacked in this sequence.
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debootstrap=Debian
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[Debian]
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packages=
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source=http://ftp.uk.debian.org/debian
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suite=lenny
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script=
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options=
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This will result in a completely normal debootstrap of Debian lenny from
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the specified mirror using packages for ARM.
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Section names are case-insensitive.
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Specify a package to extend the debootstap to include that package and
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all dependencies.
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Specify a script only if the suite is not currently supported by
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debootstrap (which in turn are based on Debian and Ubuntu suite names).
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Useful options can include --no-resolve-deps if one of the repositories
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contains packages that are also in any of the other repositories but at
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a lower version. This prevents debootstrap unpacking the older version
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of the duplicated package.
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General settings:
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The order of repositories specified in the debootstrap (under General),
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determines which repository is unpacked first - this is important if one
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repository is incomplete or contains older versions.
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'directory' specifies the top level directory where the debootstrap
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will be created - it is not packed into a .tgz once complete.
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'retries' determines how many times debootstrap should be allowed to
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restart (the same value is used for all repositories) to allow for
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temporary network issues.
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If 'arch' does not match the build architecture (determined using
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`dpkg-architecture -qDEB_BUILD_ARCH`, --foreign is passed to
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each debootstrap.
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Note that em_multistrap deliberately turns off Install-Recommends.
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As with debootstrap, em_multistrap will continue after errors although
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you may want to purge $directory/var/cache/apt/archives from time to
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time.
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=cut
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