lxc-precise-lts

#!/usr/bin/env ruby

# This is just to fix precise in LTS

require 'fileutils'

LXC_TEMPLATE = '/usr/lib/lxc/templates/lxc-ubuntu'

def report(action)
  print "#{action}... "
  yield
  puts 'done'
end

# Set paths
repo_root = ENV['REPO_PATH'] || '/opt/debootstrap-repos'
precise_root = File.join(repo_root, 'precise')
pool = File.join(precise_root, 'pool')
component = File.join(precise_root, 'dists/precise/main/binary-amd64')
conf = File.join(repo_root, 'debrepos.conf')

# Build paths
report 'Creating required directories' do
  FileUtils.mkdir_p(component)
  FileUtils.mkdir_p(pool)
  FileUtils.ln_s(pool, File.join(component, pool))
end

# define required packages
report 'Fetching required package list' do
  packages = `debootstrap --print-debs --include="vim,ssh" precise /tmp/precise-bootstrap`.strip
end

# download packages
report 'Downloading packages' do
  Dir.chdir(pool)
  unless system("apt-get download #{packages}")
    warn 'Package download failed!'
    exit 1
  end
end

# Create conf file
report 'Creating configuration file' do
  File.open(conf, 'w') do |f|
    f.puts %(
Dir {
  ArchiveDir #{precise_root};
}
Default
{
  Packages::Compress ". gzip";
  Sources::Compress ". gzip";
  Contents::Compress ". gzip";
}
bindirectory "pool"
{
  Packages "dists/precise/main/binary-amd64/Packages";
  Contents "dists/precise/main/binary-amd64/Contents";
}
    )
  end
end

# generate
report 'Generating archive' do
  Dir.chdir(repo_root)
  unless system("apt-ftparchive generate #{File.basename(conf)}")
    warn 'Archive generation failed!'
    exit 1
  end
end

report 'Adding release files' do
  [precise_root, component].each do |d|
    Dir.chdir(d)
    con = `apt-ftparchive release .`
    File.open(File.join(d, 'Release'), 'w') do |file|
      file.puts "Components main\n#{con}\n"
    end
  end
end

if File.exist?(LXC_TEMPLATE)
  report 'Updating ubuntu lxc template' do
    contents = File.readlines(LXC_TEMPLATE)
    contents.map! do |line|
      if line =~ /^\s*debootstrap.+\$MIRROR\s*$/
        'debootstrap --no-check-gpg --verbose --components=main --arch=$arch --include=$packages $release $cache/partial-$arch $LOCAL_REPO'
      else
        line
      end
    end
    File.open(LXC_TEMPLATE, 'w') do |file|
      file.puts contents.join("\n")
    end
  end
end

puts "\nSUCCESS: Local updated precise repository created for debootstrap"
puts "  USAGE: debootstrap precise store_dir file://#{precise_root}"
if File.exist?(LXC_TEMPLATE)
  puts "LXC USAGE: LOCAL_REPO=\"file://#{precise_root}\" lxc-create -n ctn-name -t ubuntu"
end