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, cache) ⇒ Stemcell

Returns a new instance of Stemcell.



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# File 'lib/cli/stemcell.rb', line 9

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

Instance Attribute Details

#manifest ⇒ Object (readonly)

Returns the value of attribute manifest.



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

def manifest
  @manifest
end

#stemcell_file ⇒ Object (readonly)

Returns the value of attribute stemcell_file.



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

def stemcell_file
  @stemcell_file
end

Instance Method Details

#perform_validation(options = {}) ⇒ Object 



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# File 'lib/cli/stemcell.rb', line 14

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

  cache_key = "%s_%s" % [@stemcell_file, File.mtime(@stemcell_file)]

  manifest_yaml = @cache.read(cache_key)

  if manifest_yaml
    say("Using cached manifest...")
  else
    say("Manifest not found in cache, verifying tarball...")

    step("Extract tarball",
         "Cannot extract tarball #{@stemcell_file}", :fatal) do
      `tar -C #{tmp_dir} -xzf #{@stemcell_file} 2>&1`
      $?.exitstatus == 0
    end

    manifest_file = File.expand_path("stemcell.MF", tmp_dir)

    step("Manifest exists", "Cannot find stemcell manifest", :fatal) do
      File.exists?(manifest_file)
    end

    step("Stemcell image file",
         "Stemcell image file is missing", :fatal) do
      File.exists?(File.expand_path("image", tmp_dir))
    end

    say("Writing manifest to cache...")
    manifest_yaml = File.read(manifest_file)
    @cache.write(cache_key, manifest_yaml)
  end

  manifest = YAML.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
ensure
  FileUtils.rm_rf(tmp_dir)
end

#print_info(manifest) ⇒ Object 



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# File 'lib/cli/stemcell.rb', line 74

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

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