Class: Bosh::Cli::Stemcell

Inherits:
Object show all
Includes:
Validation
Defined in:
lib/cli/stemcell.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Validation

#errors, #reset_validation, #valid?, #validate

Constructor Details

#initialize(tarball_path) ⇒ Stemcell


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# File 'lib/cli/stemcell.rb', line 7

def initialize(tarball_path)
  @stemcell_file = File.expand_path(tarball_path, Dir.pwd)
end

Instance Attribute Details

#manifestObject (readonly)

Returns the value of attribute manifest


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# File 'lib/cli/stemcell.rb', line 5

def manifest
  @manifest
end

#stemcell_fileObject (readonly)

Returns the value of attribute stemcell_file


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# File 'lib/cli/stemcell.rb', line 5

def stemcell_file
  @stemcell_file
end

Instance Method Details

#perform_validation(options = {}) ⇒ Object


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# File 'lib/cli/stemcell.rb', line 11

def perform_validation(options = {})
  tmp_dir = Dir.mktmpdir

  step("File exists and readable",
       "Cannot find stemcell file #{@stemcell_file}", :fatal) do
    File.exists?(@stemcell_file) && File.readable?(@stemcell_file)
  end

  say("Verifying tarball...")

  stemcell_mf = "stemcell.MF"

  tar = nil
  step("Read tarball",
       "Cannot read tarball #{@stemcell_file}", :fatal) do
    tgz = Zlib::GzipReader.new(File.open(@stemcell_file,'rb'))
    tar = Minitar.open(tgz)
    !!tar
  end

  manifest = false # assign false because we return something truthy

  image = false
  tar.each do |entry|
    if entry.full_name == stemcell_mf
      tar.extract_entry(tmp_dir, entry)
      manifest = true
    elsif entry.full_name == "image"
      image = true
    end
  end

  step("Manifest exists", "Cannot find stemcell manifest", :fatal) do
    manifest
  end

  step("Stemcell image file",
       "Stemcell image file is missing", :fatal) do
    image
  end

  manifest_file = File.expand_path(stemcell_mf, tmp_dir)
  manifest_yaml = File.read(manifest_file)

  manifest = Psych.load(manifest_yaml)

  step("Stemcell properties",
       "Manifest should contain valid name, " +
           "version and cloud properties") do
    manifest.is_a?(Hash) && manifest.has_key?("name") &&
        manifest.has_key?("version") &&
        manifest.has_key?("cloud_properties") &&
        manifest["name"].is_a?(String) &&
        (manifest["version"].is_a?(String) ||
            manifest["version"].kind_of?(Numeric)) &&
        (manifest["cloud_properties"].nil? ||
            manifest["cloud_properties"].is_a?(Hash))
  end

  print_info(manifest)
  @manifest = manifest

  true
ensure
  FileUtils.rm_rf(tmp_dir)
end

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# File 'lib/cli/stemcell.rb', line 78

def print_info(manifest)
  say("\nStemcell info")
  say("-------------")

  say("Name:    %s" % [manifest["name"] || "missing".make_red])
  say("Version: %s" % [manifest["version"] || "missing".make_red])
end