48e1214d02
Woohoo! We can now install systems by either copying recursively, or untarring a file. TODO: rpmstrap + debootstrap.
393 lines
6.8 KiB
Perl
Executable File
393 lines
6.8 KiB
Perl
Executable File
#!/usr/bin/perl -w
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=head1 NAME
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xt-install-image - Install a fresh copy of GNU/Linux into a directory
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=cut
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=head1 SYNOPSIS
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xt-install-image [options]
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Help Options:
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--help Show this scripts help information.
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--manual Read this scripts manual.
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--version Show the version number and exit.
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Debugging Options:
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--verbose Be verbose in our execution.
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Mandatory Options:
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--location The location to use for the new installation
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--dist The name of the distribution which has been installed.
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Exclusive Options:
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--untar
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--debootstrap + --mirror
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--rpmstrap
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--copy
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All other options from B<xen-create-image> will be passed as environmental
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variables.
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=cut
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=head1 NOTES
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This script is invoked by B<xen-create-image> after to create a new
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distribution of Linux.
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There are several available methods of installation, depending upon the
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users choice:
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The command line arguments which are mandatory are:
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--location - The installation root to use.
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--dist - The distribution which is to be installed.
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Once those mandatory arguments are parsed the installation method will
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be selected. This could be one of :
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* tar
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Untar the given file. Assume this contains a complete installation.
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* copy
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Copy from the given directory. Assume this contains a complete installation.
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* rpmstrap
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Install using rpmstrap the named dist
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* debootstrap
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Install using debootstrap the named dist.
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=cut
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=head1 AUTHOR
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Steve
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--
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http://www.steve.org.uk/
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$Id: xt-install-image,v 1.6 2006-06-09 17:29:05 steve Exp $
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=cut
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=head1 LICENSE
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Copyright (c) 2005-2006 by Steve Kemp. All rights reserved.
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This module is free software;
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you can redistribute it and/or modify it under
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the same terms as Perl itself.
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The LICENSE file contains the full text of the license.
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=cut
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use strict;
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use Env;
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use Getopt::Long;
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use Pod::Usage;
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#
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# Configuration values read from the command line.
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#
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# We do not need to read any configuration file.
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#
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my %CONFIG;
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#
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# Release number.
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#
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my $RELEASE = '2.0';
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#
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# Parse the command line arguments.
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#
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parseCommandLineArguments();
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#
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# Check our arguments
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#
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checkArguments();
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#
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# Work out how to install:
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#
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#
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# Simplest cases first.
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#
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if ( $CONFIG{'copy'} )
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{
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#
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# Run a command to copy an installed system into the new root.
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#
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runCommand( "/bin/cp -a $CONFIG{'copy'}/* $CONFIG{'location'}" );
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}
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elsif ( $CONFIG{'untar'} )
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{
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#
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# Run a command to copy an installed system into the new root.
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#
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runCommand( "cd $CONFIG{'location'} && tar -xvf $CONFIG{'untar'}" );
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}
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elsif ( $CONFIG{'debootstrap'} )
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{
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print "TODO: rpmstrap\n";
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}
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elsif ( $CONFIG{'rpmstrap'} )
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{
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print "TODO: rpmstrap\n";
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}
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else
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{
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#
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# error
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#
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# return a code so that xen-create-image can abort.
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}
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#
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# Exit cleanly - any errors which have already occurred will result
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# in "exit 1".
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#
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exit 0;
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=head2 parseArguments
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Parse the command line arguments this script was given.
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=cut
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sub parseCommandLineArguments
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{
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my $HELP = 0;
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my $MANUAL = 0;
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my $VERSION = 0;
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#
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# Parse options.
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#
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GetOptions(
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# Mandatory
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"location=s", \$CONFIG{'location'},
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"dist=s", \$CONFIG{'dist'},
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# Exclusive.
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"tar=s", \$CONFIG{'tar'},
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"copy=s", \$CONFIG{'copy'},
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"rpmstrap", \$CONFIG{'rpmstrap'},
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"debootstrap", \$CONFIG{'debootstrap'},
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# Misc
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"mirror=s", \$CONFIG{'mirror'},
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# Help.
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"verbose", \$CONFIG{'verbose'},
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"help", \$HELP,
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"manual", \$MANUAL,
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"version", \$VERSION
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);
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pod2usage(1) if $HELP;
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pod2usage(-verbose => 2 ) if $MANUAL;
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if ( $VERSION )
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{
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my $REVISION = '$Revision: 1.6 $';
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if ( $REVISION =~ /1.([0-9.]+) / )
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{
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$REVISION = $1;
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}
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print "xt-install-image release $RELEASE - CVS: $REVISION\n";
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exit;
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}
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}
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=head2 checkArguments
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Test that the command line arguments we were given make sense.
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=cut
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sub checkArguments
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{
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#
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# We require a location.
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#
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if ( ! defined( $CONFIG{'location'} ) )
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{
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print "The '--location' argument is mandatory\n";
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exit 1;
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}
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#
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# Test that the location we've been told contains
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# a fresh installation of Linux exists
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#
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if ( ! -d $CONFIG{'location'} )
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{
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print "The installation directory we've been given doesn't exist\n";
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print "We tried to use : $CONFIG{'location'}\n";
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exit 1;
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}
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#
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# We require a distribution name.
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#
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if ( ! defined( $CONFIG{'dist'} ) )
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{
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print "The '--dist' argument is mandatory\n";
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exit 1;
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}
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#
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# Test that the distribution name we've been given
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# to configure has a collection of hook scripts.
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#
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# If there are no scripts then we clearly cannot
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# customise it!
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#
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my $dir = "/usr/lib/xen-tools/" . $CONFIG{'dist'} . ".d";
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if ( ! -d $dir )
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{
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print <<E_OR;
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We're trying to configure an installation of $CONFIG{'dist'} in
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$CONFIG{'location'} - but there is no hook directory for us to use.
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This means we won't know how to configure this installation.
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We'd expect the hook directory to be : $dir
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Aborting.
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E_OR
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exit 1;
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}
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##
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# Now check the mutually distinct arguments
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##
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my $count = 0;
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foreach my $key ( qw(copy debootstrap rpmstrap tar ) )
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{
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if ( defined( $CONFIG{$key} ) )
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{
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$count += 1;
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}
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}
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#
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# If count == 0 we had no recognised installation methods
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#
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if ( $count == 0 )
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{
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print <<EOF;
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You did not specify an installation method.
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One of the following must be given. (Run "xt-install-image --manual" for details)
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--copy
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--debootstrap
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--rpmstrap
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--tar
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Aborting.
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EOF
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exit 1;
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}
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elsif ( $count > 1 )
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{
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print <<EOF;
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You specify multiple installation methods.
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Only one of the following must be given:
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--copy
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--debootstrap
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--rpmstrap
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--tar
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Aborting.
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EOF
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exit 1;
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}
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}
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=head2 runCommand
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A utility method to run a system command. We will capture the return
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value and exit if the command files.
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When running verbosely we will also display any command output.
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=cut
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sub runCommand
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{
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my ( $cmd ) = (@_ );
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#
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# Header.
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#
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$CONFIG{'verbose'} && print "Executing : $cmd\n";
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#
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# Hide output unless running with --debug.
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#
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$cmd .= " >/dev/null 2>/dev/null" unless $CONFIG{'verbose'};
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#
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# Run it.
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#
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my $output = `$cmd`;
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if ( $? != 0 )
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{
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print "Running command '$cmd' failed.\n";
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print "Aborting\n";
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exit;
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}
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#
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# All done.
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#
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$CONFIG{'verbose'} && print "Output\n";
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$CONFIG{'verbose'} && print "======\n";
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$CONFIG{'verbose'} && print $output . "\n";
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$CONFIG{'verbose'} && print "Finished : $cmd\n";
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return( $output );
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}
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