Class: Vanagon::Component

Inherits:
Object
  • Object
show all
Includes:
HashableAttributes, Utilities
Defined in:
lib/vanagon/component.rb,
lib/vanagon/component/dsl.rb,
lib/vanagon/component/rules.rb,
lib/vanagon/component/source.rb,
lib/vanagon/extensions/hashable.rb,
lib/vanagon/component/source/git.rb,
lib/vanagon/component/source/http.rb,
lib/vanagon/component/source/local.rb,
lib/vanagon/component/source/rewrite.rb

Defined Under Namespace

Classes: DSL, Rules, Source

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from HashableAttributes

#to_hash, #to_json

Methods included from Utilities

#erb_file, #erb_string, #ex, #find_program_on_path, #get_md5sum, #get_sum, #http_request, #local_command, #remote_ssh_command, #retry_with_timeout, #rsync_from, #rsync_to, #ssh_command

Constructor Details

#initialize(name, settings, platform) ⇒ Vanagon::Component

Component constructor.

Parameters:

  • name (String) —

    the name of the component

  • settings (Hash) —

    the settings to be used in the component

  • platform (Vanagon::Platform) —

    the platform to build the component for



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# File 'lib/vanagon/component.rb', line 153

def initialize(name, settings, platform) # rubocop:disable Metrics/AbcSize
  @name = name
  @settings = settings
  @platform = platform
  @options = {}
  @build_requires = []
  @requires = []
  @configure = []
  @install = []
  @build = []
  @check = []
  @patches = []
  @files = Set.new
  @ghost_files = Set.new
  @directories = []
  @replaces = []
  @provides = []
  @conflicts = []
  @environment = Vanagon::Environment.new
  @sources = []
  @preinstall_actions = []
  @install_triggers = []
  @interest_triggers = []
  @activate_triggers = []
  @postinstall_actions = []
  @preremove_actions = []
  @postremove_actions = []
  @install_only = false
end

Instance Attribute Details

#activate_triggers ⇒ Object

activate_triggers is a one-dimentional Array of Strings, describing scripts that should be executed when a package identifies an activate trigger



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# File 'lib/vanagon/component.rb', line 106

def activate_triggers
  @activate_triggers
end

#build ⇒ Object

build will hold an Array of the commands required to build a given component



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# File 'lib/vanagon/component.rb', line 48

def build
  @build
end

#build_dir ⇒ Object

the optional name of a directory to build a component in; most likely to be used for cmake projects, which do not like to be configured or compiled in their own top-level directories.



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# File 'lib/vanagon/component.rb', line 45

def build_dir
  @build_dir
end

#build_requires ⇒ Object

build_requires holds an Array with a list of the dependencies that a given component needs satisfied before it can be built.



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# File 'lib/vanagon/component.rb', line 82

def build_requires
  @build_requires
end

#check ⇒ Object

check will hold an Array of the commands required to validate/test a given component



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# File 'lib/vanagon/component.rb', line 51

def check
  @check
end

#cleanup_source ⇒ Object

cleanup_source contains whatever value a given component’s Source has specified as instructions for cleaning up after a build is completed. usually a String, but not required to be.



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# File 'lib/vanagon/component.rb', line 119

def cleanup_source
  @cleanup_source
end

#configure ⇒ Object

how should this component be configured?



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# File 'lib/vanagon/component.rb', line 41

def configure
  @configure
end

#conflicts ⇒ Object

conflicts holds an Array of OpenStructs that describe a package that a given component will replace on installation.



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# File 'lib/vanagon/component.rb', line 94

def conflicts
  @conflicts
end

#directories ⇒ Object

directories holds an Array with a list of expected directories that will be packed into the resulting artifact’s bill of materials.



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# File 'lib/vanagon/component.rb', line 79

def directories
  @directories
end

#dirname ⇒ Object

holds the expected directory name of a given component, once it’s been unpacked/decompressed. For git repos, it’s usually the directory that they were cloned to. For the outlying flat files, it’ll end up being defined explicitly as the string ‘./’



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# File 'lib/vanagon/component.rb', line 36

def dirname
  @dirname
end

#environment ⇒ Object

holds a Vanagon::Environment object, to map out any desired environment variables that should be rendered into the Makefile



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# File 'lib/vanagon/component.rb', line 58

def environment
  @environment
end

#extract_with ⇒ Array

Returns the specific tool or command line invocations that should be used to extract a given component’s primary source.

Returns:

  • (Array) —

    the specific tool or command line invocations that should be used to extract a given component’s primary source



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# File 'lib/vanagon/component.rb', line 39

def extract_with
  @extract_with
end

#files ⇒ Set (readonly)

Retrieve all items from @files not marked as configuration files

Returns:

  • (Set) —

    all files not marked as configuration files




# File 'lib/vanagon/component.rb', line 9

#homepage ⇒ Object

Returns the value of attribute homepage.



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# File 'lib/vanagon/component.rb', line 26

def homepage
  @homepage
end

#install ⇒ Object

install will hold an Array of the commands required to install a given component



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# File 'lib/vanagon/component.rb', line 54

def install
  @install
end

#install_only ⇒ Object

When dealing with compiled artifacts generated by setting ‘project.generate_archives true`, you only need to install the component. By setting install_only to true the component ’build’ will exclude the unpack, patch, configure, build, and check steps.



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# File 'lib/vanagon/component.rb', line 125

def install_only
  @install_only
end

#install_triggers ⇒ Object

install_triggers is a one-dimensional Array of OpenStructs, describing scripts that should be executed when a package is installed or upgraded



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# File 'lib/vanagon/component.rb', line 100

def install_triggers
  @install_triggers
end

#interest_triggers ⇒ Object

interest_triggers is a one-dimensional Array of OpenStructs, describing scripts that should be executed when a package identifies an interest trigger



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# File 'lib/vanagon/component.rb', line 103

def interest_triggers
  @interest_triggers
end

#license ⇒ Object

Returns the value of attribute license.



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# File 'lib/vanagon/component.rb', line 25

def license
  @license
end

#mirrors ⇒ Set

Returns a list of unique mirror URIs that should be used to retrieve the upstream source before attempting to retrieve from whatever URI was defined for #uri. If no mirrors are set and the deprecated rewrite system has been configured, this will return rewritten URIs.

Returns:

  • (Set) —

    a list of unique mirror URIs that should be used to retrieve the upstream source before attempting to retrieve from whatever URI was defined for #uri. If no mirrors are set and the deprecated rewrite system has been configured, this will return rewritten URIs



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# File 'lib/vanagon/component.rb', line 240

def mirrors
  @mirrors
end

#name ⇒ Object

The name, version, primary source, supplementary sources, associated patches, upstream URL (for fetching the source), homepage, and license of a given component



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# File 'lib/vanagon/component.rb', line 18

def name
  @name
end

#options ⇒ Object

used to hold the checksum settings or other weirdo metadata related to building a given component (git ref, sha, etc.). Probably conflicts or collides with #settings to some degree.



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# File 'lib/vanagon/component.rb', line 68

def options
  @options
end

#patches ⇒ Object

Returns the value of attribute patches.



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# File 'lib/vanagon/component.rb', line 22

def patches
  @patches
end

#platform ⇒ Object

the platform that a given component will be built for – due to the fact that Ruby is pass-by-reference, it’s usually just a reference to the same Platform object that the overall Project object also contains. This is a definite code smell, and should be slated for refactoring ASAP because it’s going to have weird side-effects if the underlying pass-by-reference assumptions change.



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# File 'lib/vanagon/component.rb', line 75

def platform
  @platform
end

#postinstall_actions ⇒ Object

postinstall_actions is a two-dimensional Array, describing scripts that should be executed after a given component is installed.



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# File 'lib/vanagon/component.rb', line 109

def postinstall_actions
  @postinstall_actions
end

#postremove_actions ⇒ Object

preinstall_actions is a two-dimensional Array, describing scripts that should be executed after a given component is uninstalled.



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# File 'lib/vanagon/component.rb', line 115

def postremove_actions
  @postremove_actions
end

#preinstall_actions ⇒ Object

preinstall_actions is a two-dimensional Array, describing scripts that should be executed before a given component is installed.



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# File 'lib/vanagon/component.rb', line 97

def preinstall_actions
  @preinstall_actions
end

#preremove_actions ⇒ Object

preremove_actions is a two-dimensional Array, describing scripts that should be executed before a given component is uninstalled.



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# File 'lib/vanagon/component.rb', line 112

def preremove_actions
  @preremove_actions
end

#provides ⇒ Object

provides holds an Array of OpenStructs that describe any capabilities that a given component will provide beyond the its filesystem payload.



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# File 'lib/vanagon/component.rb', line 91

def provides
  @provides
end

#replaces ⇒ Object

replaces holds an Array of OpenStructs that describe a package that a given component will replace on installation.



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# File 'lib/vanagon/component.rb', line 88

def replaces
  @replaces
end

#requires ⇒ Object

requires holds an Array with a list of all dependencies that a given component needs satisfied before it can be installed.



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# File 'lib/vanagon/component.rb', line 85

def requires
  @requires
end

#service ⇒ Object

holds an OpenStruct describing all of the particular details about how any services associated with a given component should be defined.



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# File 'lib/vanagon/component.rb', line 30

def service
  @service
end

#settings ⇒ Object

holds a OpenStruct, or an Array, or maybe it’s a Hash? It’s often overloaded as a freeform key-value lookup for platforms that require additional configuration beyond the “basic” component attributes. it’s pretty heavily overloaded and should maybe be refactored before Vanagon 1.0.0 is tagged.



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# File 'lib/vanagon/component.rb', line 64

def settings
  @settings
end

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/vanagon/component.rb', line 20

def source
  @source
end

#sources ⇒ Object

Returns the value of attribute sources.



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# File 'lib/vanagon/component.rb', line 21

def sources
  @sources
end

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/vanagon/component.rb', line 23

def url
  @url
end

#version ⇒ Object

Returns the value of attribute version.



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# File 'lib/vanagon/component.rb', line 19

def version
  @version
end

Class Method Details

.load_component(name, configdir, settings, platform) ⇒ Vanagon::Component

Loads a given component from the configdir

Parameters:

  • name (String) —

    the name of the component

  • configdir (String) —

    the path to the component config file

  • settings (Hash) —

    the settings to be used in the component

  • platform (Vanagon::Platform) —

    the platform to build the component for

Returns:

Raises:

  • if the instance_eval on Component fails, the exception is reraised



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# File 'lib/vanagon/component.rb', line 135

def self.load_component(name, configdir, settings, platform)
  compfile = File.join(configdir, "#{name}.rb")
  dsl = Vanagon::Component::DSL.new(name, settings, platform)
  dsl.instance_eval(File.read(compfile), compfile, 1)
  dsl._component
rescue StandardError => e
  warn "Error loading project '#{name}' using '#{compfile}':"
  warn e
  warn e.backtrace.join("\n")
  raise e
end

Instance Method Details

#add_file(file) ⇒ Set?

Adds the given file to the list of files and returns @files.

Parameters:

Returns:

  • (Set, nil) —

    Returns @files if file is successfully added to @files or nil if file already exists



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# File 'lib/vanagon/component.rb', line 188

def add_file(file)
  @files.add file
end

#add_rpm_ghost_file(file) ⇒ Set?

Adds the given file to the list of %ghost files to be added to an rpm spec’s %files.

Parameters:

Returns:

  • (Set, nil) —

    Returns @ghost_files if the file is successfully added to @ghost_files or nil if the file already exists.



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# File 'lib/vanagon/component.rb', line 198

def add_rpm_ghost_file(file)
  @ghost_files.add file
end

#configfiles ⇒ Set

Retrieve all items from @files explicitly marked as configuration files

Returns:

  • (Set) —

    all files explicitly marked as configuration files



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# File 'lib/vanagon/component.rb', line 223

def configfiles
  @files.select(&:configfile?)
end

#delete_file(file) ⇒ Set?

Deletes the given file from the list of files and returns @files.

Parameters:

  • file (String) —

    path of file to delete from a component’s list of files

Returns:

  • (Set, nil) —

    Returns @files if file is successfully deleted from @files or nil if file doesn’t exist; this matches strictly on the path of a given file, and ignores other attributes like :mode, :owner, or :group.



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# File 'lib/vanagon/component.rb', line 209

def delete_file(file)
  @files.delete_if { |this_file| this_file.path == file }
end

#environment_variables ⇒ Object 



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# File 'lib/vanagon/component.rb', line 423

def environment_variables
  environment.map { |key, value| %(export #{key}="#{value}") }
end

#fetch_mirrors(options) ⇒ Boolean

Retrieve upstream source file from a mirror, by randomly iterating through #mirrors until there’s no more mirrors left. Will #warn if the mirror’s URI cannot be resolved or if the URI cannot be retrieved. Does not suppress any errors from Vanagon::Component::Source.

Returns:

  • (Boolean) —

    return True if the source can be retrieved, or False otherwise. This is because because each subclass of Vanagon::Component::Source returns an inconsistent value if #fetch is successful.



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# File 'lib/vanagon/component.rb', line 254

def fetch_mirrors(options)
  mirrors.to_a.shuffle.each do |mirror|
    begin
      warn %(Attempting to fetch from mirror URL "#{mirror}")
      @source = Vanagon::Component::Source.source(mirror, options)
      return true if source.fetch
    rescue SocketError
      # SocketError means that there was no DNS/name resolution
      # for whatever remote protocol the mirror tried to use.
      warn %(Unable to resolve mirror URL "#{mirror}")
    rescue RuntimeError
      # Source retrieval does not consistently return a meaningful
      # namespaced error message, which means we're brute-force rescuing
      # RuntimeError. Not a good look, and we should fix this.
      warn %(Unable to retrieve mirror URL "#{mirror}")
    end
  end
  false
end

#fetch_url(options) ⇒ Boolean

Retrieve upstream source file from the canonical URL. Does not suppress any errors from Vanagon::Component::Source.

Returns:

  • (Boolean) —

    return True if the source can be retrieved, or False otherwise



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# File 'lib/vanagon/component.rb', line 279

def fetch_url(options)
  warn %(Attempting to fetch from canonical URL "#{url}")
  @source = Vanagon::Component::Source.source(url, options)
  # Explicitly coerce the return value of #source.fetch,
  # because each subclass of Vanagon::Component::Source returns
  # an inconsistent value if #fetch is successful.
  !!source.fetch
end

#force_version ⇒ Object

Force version determination for components

If the component doesn’t already have a version set (which normally happens for git sources), the source will be fetched into a temporary directory to attempt to figure out the version if the source type supports :version. This directory will be cleaned once the get_sources method returns

Raises:

  • Vanagon::Error raises a vanagon error if we’re unable to determine the version



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# File 'lib/vanagon/component.rb', line 393

def force_version
  if @version.nil?
    Dir.mktmpdir do |dir|
      get_source(dir)
    end
  end
  raise Vanagon::Error, "Unable to determine source version for component #{@name}!" if @version.nil?
  @version
end

#get_build_dir ⇒ Object

Expands the build directory



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# File 'lib/vanagon/component.rb', line 333

def get_build_dir
  if @build_dir
    File.join(@dirname, @build_dir)
  else
    @dirname
  end
end

#get_dependency_hash ⇒ Object 



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# File 'lib/vanagon/component.rb', line 341

def get_dependency_hash
  { name => { 'version' => version, 'url' => url, 'ref' => options[:ref] }.delete_if { |_, v| !v } }
end

#get_environment ⇒ String

Deprecated.

Prints the environment in a way suitable for use in a Makefile or shell script. This is deprecated, because all Env. Vars. are moving directly into the Makefile (and out of recipe subshells).

Returns:

  • (String) —

    environment suitable for inclusion in a Makefile



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# File 'lib/vanagon/component.rb', line 409

def get_environment
  warn <<-WARNING.undent
    #get_environment is deprecated; environment variables have been moved
    into the Makefile, and should not be used within a Makefile's recipe.
    The #get_environment method will be removed by Vanagon 1.0.0.
  WARNING

  if environment.empty?
    ": no environment variables defined"
  else
    environment_variables
  end
end

#get_patches(patch_root) ⇒ Object

Fetches patches if any are provided for the project.

Parameters:

  • patch_root (String) —

    working directory to put the patches into



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# File 'lib/vanagon/component.rb', line 373

def get_patches(patch_root)
  return if @patches.empty?
  @patches.each do |patch|
    patch_assembly_path = File.join(patch_root, patch.assembly_path)
    if File.exist?(patch_assembly_path)
      raise Vanagon::Error, "Duplicate patch files detected, '#{patch.origin_path}' would have overwritten '#{patch.assembly_path}'. Ensure all patch file names within a component are unique."
    end
    patch_target_directory = File.dirname(patch_assembly_path)
    FileUtils.mkdir_p(patch_target_directory)
    FileUtils.cp(patch.origin_path, patch_assembly_path)
  end
end

#get_source(workdir) ⇒ Object

Fetches the primary source for the component. As a side effect, also sets @extract_with, @dirname and @version for the component for use in the makefile template

Parameters:

  • workdir (String) —

    working directory to put the source into



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# File 'lib/vanagon/component.rb', line 303

def get_source(workdir) # rubocop:disable Metrics/AbcSize, Metrics/PerceivedComplexity
  opts = options.merge({ workdir: workdir })
  if url || !mirrors.empty?
    if ENV['VANAGON_USE_MIRRORS'] == 'n'
      fetch_url(opts)
    else
      fetch_mirrors(opts) || fetch_url(opts)
    end
    source.verify
    extract_with << source.extract(platform.tar) if source.respond_to? :extract

    @cleanup_source = source.cleanup if source.respond_to?(:cleanup)
    @dirname ||= source.dirname

    # Git based sources probably won't set the version, so we load it if it hasn't been already set
    if source.respond_to?(:version)
      @version ||= source.version
    end
  else
    warn "No source given for component '#{@name}'"

    # If there is no source, we don't want to try to change directories, so we just change to the current directory.
    @dirname = './'

    # If there is no source, there is nothing to do to extract
    extract_with << ': no source, so nothing to extract'
  end
end

#get_sources(workdir) ⇒ Object

Fetches secondary sources for the component. These are just dumped into the workdir currently.

Parameters:

  • workdir (String) —

    working directory to put the source into



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# File 'lib/vanagon/component.rb', line 348

def get_sources(workdir) # rubocop:disable Metrics/AbcSize
  sources.each do |source|
    src = Vanagon::Component::Source.source(
      source.url, workdir: workdir, ref: source.ref, sum: source.sum
    )
    src.fetch
    src.verify
    if source.erb
      erb_file(src.file, File.join(File.dirname(src.file), File.basename(src.file, ".erb")), true)
    end
    # set src.file to only be populated with the basename instead of entire file path
    src.file = File.basename(src.url)
    extract_with << src.extract(platform.tar) if src.respond_to? :extract
  end
end

#rpm_ghost_files ⇒ Array

Retrieve all the files intended as %ghost entries for an rpm spec %files section.

Returns:

  • (Array) —

    of all the rpm %ghost files.



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# File 'lib/vanagon/component.rb', line 231

def rpm_ghost_files
  @ghost_files.to_a
end

#rules(project, platform) ⇒ Object 



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# File 'lib/vanagon/component.rb', line 427

def rules(project, platform)
  Vanagon::Component::Rules.new(self, project, platform)
end