Class: Simp::YUM

Inherits:
Object
  • Object
show all
Defined in:
lib/simp/yum.rb

Overview

Various utilities for dealing with YUM repos

Defined Under Namespace

Classes: Error

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(yum_conf, initialize_cache = false) ⇒ YUM

Returns a new instance of YUM.

Raises:



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# File 'lib/simp/yum.rb', line 17

def initialize(yum_conf, initialize_cache = false)
  raise(Error, "Could not find yum configuration at '#{yum_conf}'") unless File.exist?(yum_conf)

  @yum_conf = File.absolute_path(yum_conf)

  # Only need to look these up once!
  @@yum_cmd ||= `which yum`.strip
  raise(Error, "Error: Could not find 'yum'. Please install and try again.") if @@yum_cmd.empty?

  tmp_dir = ENV['TMPDIR'] || '/tmp'

  # Ensure that yumdownloader uses a fresh cache directory for each run of a given platform
  @@yum_cache ||= File.join(tmp_dir, 'yum_cache-' +
    Facter.fact('operatingsystem').value + '-' +
    Facter.fact('operatingsystemmajrelease').value + '-' +
    Facter.fact('architecture').value)

  FileUtils.mkdir_p(@@yum_cache)

  @@yum ||= "TMPDIR=#{@@yum_cache} #{@@yum_cmd} -c #{@yum_conf}"

  @@yumdownloader_cmd ||= `which yumdownloader`.strip
  raise(Error, "Error: Could not find 'yumdownloader'. Please install and try again.") if @@yumdownloader_cmd.empty?

  @@yumdownloader ||= "TMPDIR=#{@@yum_cache} #{@@yumdownloader_cmd} -c #{@yum_conf}"

  @@curl ||= `which curl`.strip
  raise(Error, "Error: Could not find 'curl'. Please install and try again.") if @@curl.empty?

  @@file ||= `which file`.strip
  raise(Error, "Error: Could not find 'file'. Please install and try again.") if @@file.empty?

  generate_cache if initialize_cache
end

Instance Attribute Details

#yum_conf ⇒ Object (readonly)

Returns the value of attribute yum_conf.



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# File 'lib/simp/yum.rb', line 15

def yum_conf
  @yum_conf
end

Class Method Details

.generate_yum_conf(yum_dir = nil) ⇒ Object

Create a reasonable YUM config file

  • yum_tmp => The directory in which to store the YUM DB and any other temporary files

Returns the location of the YUM configuration

Raises:



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# File 'lib/simp/yum.rb', line 74

def self.generate_yum_conf(yum_dir = nil)
  yum_dir ||= Dir.pwd

  raise(Error, "Could not find YUM data dir at '#{yum_dir}'") unless File.directory?(yum_dir)

  yum_conf = nil
  Dir.chdir(yum_dir) do
    # Create the target directory
    yum_tmp = File.join('packages', 'yum_tmp')

    FileUtils.mkdir_p(yum_tmp) unless File.directory?(yum_tmp)

    yum_cache = File.expand_path('yum_cache', yum_tmp)
    FileUtils.mkdir_p(yum_cache) unless File.directory?(yum_cache)

    yum_logfile = File.expand_path('yum.log', yum_tmp)

    repo_dirs = []

    # Add the global directory
    repo_dirs << File.expand_path('../my_repos')

    repo_dirs << if File.directory?('my_repos')
                   # Add the local user repos if they exist
                   File.expand_path('my_repos')
                 else
                   # Add the default Internet repos otherwise
                   File.expand_path('repos')
                 end

    # Create our YUM config file
    yum_conf = File.expand_path('yum.conf', yum_tmp)

    File.open(yum_conf, 'w') do |fh|
      fh.puts <<-EOM.gsub(%r{^\s+}, '')
      [main]
      keepcache = 0
      persistdir = #{yum_cache}
      logfile = #{yum_logfile}
      exactarch = 1
      obsoletes = 0
      gpgcheck = 0
      plugins = 1
      reposdir = #{repo_dirs.join(' ')}
      assumeyes = 1
      EOM
    end
  end

  yum_conf
end

Instance Method Details

#available_package(rpm) ⇒ Object

Returns the full name of the latest package of the given name

Returns nil if nothing found



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# File 'lib/simp/yum.rb', line 129

def available_package(rpm)
  yum_output = `#{@@yum} list #{rpm} 2>/dev/null`

  found_rpm = nil
  if $CHILD_STATUS.success?
    pkg_name, pkg_version = yum_output.lines.last.strip.split(%r{\s+})
    pkg_name, pkg_arch = pkg_name.split('.')

    found_rpm = %(#{pkg_name}-#{pkg_version}.#{pkg_arch}.rpm)
  end

  found_rpm
end

#clean_yum_cache_dir ⇒ Object 



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# File 'lib/simp/yum.rb', line 52

def clean_yum_cache_dir
  # Make this as safe as we can
  return unless @@yum_cache.include?('yum_cache')

  FileUtils.remove_entry(@@yum_cache)
end

#download(rpm, opts = { :target_dir => nil }) ⇒ Object 



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# File 'lib/simp/yum.rb', line 172

def download(rpm, opts = { :target_dir => nil })
  rpm.strip!

  downloaded_rpm_name = nil

  target_dir = Dir.pwd

  if opts[:target_dir]
    target_dir = File.absolute_path(opts[:target_dir])
  end

  Dir.mktmpdir do |dir|
    Dir.chdir(dir) do
      # If just passed an RPM name, use yumdownloader
      if rpm.include?('://')
        # If passed a URL, curl it and fall back to yumdownloader
        rpm_name = rpm.split('/').last

        `#{@@curl} -L --max-redirs 10 -s -o #{rpm_name} -k #{rpm}`

        # Check what we've just downloaded
        unless File.exist?(rpm_name) && `#{@@file} #{rpm_name}`.include?('RPM')
          # Fall back on yumdownloader
          FileUtils.rm_f(rpm_name)

          `#{@@yumdownloader} #{File.basename(rpm_name, '.rpm')} 2>/dev/null`
        end

        # We might get a filename that doesn't make sense so we need to
        # move the file appropriately
        rpm_info = Simp::RPM.new(rpm_name)

        unless File.exist?(rpm_info.rpm_name)
          FileUtils.mv(rpm_name, rpm_info.rpm_name)
        end

        downloaded_rpm_name = rpm_info.rpm_name
      else
        # In case someone passed a path
        rpm_name = rpm.split(File::SEPARATOR).last

        `#{@@yumdownloader} #{File.basename(rpm_name, '.rpm')} 2>/dev/null`

        downloaded_rpm_name = rpm_name
      end

      rpms = Dir.glob('*.rpm')

      err_msg = ''
      err_msg = "\n-- ERROR MESSAGE --\n" + err_msg if err_msg
      raise(Error, "Could not find any remote RPMs for #{rpm}" + err_msg) if rpms.empty?

      # Copy over all of the RPMs
      rpms.each do |new_rpm|
        FileUtils.mkdir_p(target_dir)
        FileUtils.mv(new_rpm, target_dir)
      end
    end
  end

  downloaded_rpm_name
end

#generate_cache ⇒ Object 



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# File 'lib/simp/yum.rb', line 59

def generate_cache
  puts "Attempting to generate build-specific YUM cache from\n  #{@yum_conf}"

  `#{@@yum} clean all 2>/dev/null`
  `#{@@yum} makecache 2>/dev/null`

  return if $CHILD_STATUS.success?

  puts "WARNING: Unable to generate build-specific YUM cache from #{@yum_conf}"
end

#get_source(rpm, arch = nil) ⇒ Object 



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# File 'lib/simp/yum.rb', line 157

def get_source(rpm, arch = nil)
  sources = get_sources(rpm)

  if arch
    native_sources = sources.grep(%r{(#{arch}|noarch)\.rpm$})

    if native_sources.size > 1
      # We can't have more than one native source
      raise(Error, "More than one native source found for #{rpm}:\n  * #{native_sources.join("\n  *")}")
    end
  end

  sources.first
end

#get_sources(rpm) ⇒ Object 



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# File 'lib/simp/yum.rb', line 143

def get_sources(rpm)
  Dir.mktmpdir do |_dir|
    output = `#{@@yumdownloader} --urls #{File.basename(rpm, '.rpm')} 2>/dev/null`.lines
    sources = output.grep(%r{\.rpm$})

    unless output.grep(%r{Error}).empty? || sources.empty?
      err_msg = "\n-- YUMDOWNLOADER ERROR --\n" + output.join("\n")
      raise(Error, "No sources found for '#{rpm}'" + err_msg)
    end

    return sources
  end
end