Class: Wavefront::Credentials

Inherits:
Object
  • Object
show all
Defined in:
lib/wavefront-sdk/credentials.rb

Overview

Helper methods to get Wavefront credentials.

Returns:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Credentials

Gives you an object of credentials and options for speaking to Wavefront. It will look in the following places:

~/.wavefront ~/.wavefront.conf /etc/wavefront/credentials WAVEFRONT_ENDPOINT and WAVEFRONT_TOKEN environment variables

Parameters:

  • options (Hash) (defaults to: {}) —

    keys may be ‘file’, which specifies a config file which will be loaded and parsed. If no file is supplied, those listed above will be used.; and/or ‘profile’ which select a profile section from ‘file’. Specify the key :raise_noprofile to have an exception thrown if a given profile cannot be found. Otherwise that is ignored and options are built from other sources.



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# File 'lib/wavefront-sdk/credentials.rb', line 39

def initialize(options = {})
  @raise_noprofile = options[:raise_on_no_profile] || false
  raw = load_from_file(real_files(cred_files(options)),
                       options[:profile] || 'default')

  populate(env_override(raw))
end

Instance Attribute Details

#all ⇒ Object (readonly)

Returns the value of attribute all.



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# File 'lib/wavefront-sdk/credentials.rb', line 21

def all
  @all
end

#config ⇒ Map (readonly)

Returns the entire loaded config.

Returns:

  • (Map) —

    the entire loaded config



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# File 'lib/wavefront-sdk/credentials.rb', line 20

class Credentials
  attr_reader :opts, :config, :creds, :proxy, :all

  # Gives you an object of credentials and options for speaking to
  # Wavefront. It will look in the following places:
  #
  # ~/.wavefront
  # ~/.wavefront.conf
  # /etc/wavefront/credentials
  # WAVEFRONT_ENDPOINT and WAVEFRONT_TOKEN environment variables
  #
  # @param options [Hash] keys may be 'file', which
  #   specifies a config file which will be loaded and parsed. If
  #   no file is supplied, those listed above will be used.;
  #   and/or 'profile' which select a profile section from 'file'.
  #   Specify the key :raise_noprofile to have an exception thrown
  #   if a given profile cannot be found. Otherwise that is ignored and
  #   options are built from other sources.
  #
  def initialize(options = {})
    @raise_noprofile = options[:raise_on_no_profile] || false
    raw = load_from_file(real_files(cred_files(options)),
                         options[:profile] || 'default')

    populate(env_override(raw))
  end

  # If the user has set certain environment variables, their
  # values will override values from the config file or
  # command-line.
  # @param raw [Hash] the existing credentials
  # @return [Hash] the modified credentials
  #
  def env_override(raw)
    { endpoint: 'WAVEFRONT_ENDPOINT',
      token: 'WAVEFRONT_TOKEN',
      proxy: 'WAVEFRONT_PROXY' }.each { |k, v| raw[k] = ENV[v] if ENV[v] }
    raw
  end

  # Make the helper values. We use a Map so they're super-easy to
  # access
  #
  # @param raw [Hash] the combined options from config file,
  #   command-line and env vars.
  # @return void
  #
  def populate(raw)
    creds_keys = %i[endpoint token]
    proxy_keys = %i[proxy port]
    all_keys = creds_keys + proxy_keys

    @config = Map(raw)
    @creds  = Map(raw.select { |k, _v| creds_keys.include?(k) })
    @proxy  = Map(raw.select { |k, _v| proxy_keys.include?(k) })
    @all    = Map(raw.select { |k, _v| all_keys.include?(k) })
  end

  # @return [Array] a list of possible credential files
  #
  def cred_files(opts = {})
    if opts.key?(:file)
      Array(Pathname.new(opts[:file]))
    else
      [Pathname.new('/etc/wavefront/credentials'),
       Pathname.new(ENV['HOME']) + '.wavefront.conf',
       Pathname.new(ENV['HOME']) + '.wavefront']
    end
  end

  def real_files(files)
    files.select { |f| f.exist? && f.file? }
  end

  # @param files [Array][Pathname] a list of ini-style config files
  # @param profile [String] a profile name
  # @param disallow_missing [Bool] whether or not to raise an exception if
  #   we are given a profile but can't find it.
  # @return [Hash] the given profile from the given list of files.
  #   If multiple files match, the last one will be used
  #
  def load_from_file(files, profile = 'default')
    ret = {}
    profiles_found = conf_files_found = 0

    files.each do |f|
      ret = load_profile(f, profile)
      conf_files_found += 1
      profiles_found += 1 unless ret.empty?
      ret[:file] = f
    end

    raise_on_missing_profile(profile, profiles_found, conf_files_found)
    ret
  end

  def raise_on_missing_profile(profile, profiles_found, conf_files_found)
    return true unless @raise_noprofile
    return true unless profiles_found.zero? && conf_files_found.positive?

    raise Wavefront::Exception::MissingConfigProfile, profile
  end

  # Load in an (optionally) given section of an ini-style configuration
  # file. If the section is not there, we don't consider that an error.
  #
  # @param file [Pathname] the file to read
  # @param profile [String] the section in the config to read
  # @return [Hash] options loaded from file. Each key becomes a symbol
  #
  def load_profile(file, profile = 'default')
    IniFile.load(file)[profile].transform_keys(&:to_sym)
  rescue StandardError
    raise Wavefront::Exception::InvalidConfigFile, file
  end
end

#creds ⇒ Map (readonly)

Returns credentials for speaking to the Wavefront API.

Returns:

  • (Map) —

    credentials for speaking to the Wavefront API



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# File 'lib/wavefront-sdk/credentials.rb', line 20

class Credentials
  attr_reader :opts, :config, :creds, :proxy, :all

  # Gives you an object of credentials and options for speaking to
  # Wavefront. It will look in the following places:
  #
  # ~/.wavefront
  # ~/.wavefront.conf
  # /etc/wavefront/credentials
  # WAVEFRONT_ENDPOINT and WAVEFRONT_TOKEN environment variables
  #
  # @param options [Hash] keys may be 'file', which
  #   specifies a config file which will be loaded and parsed. If
  #   no file is supplied, those listed above will be used.;
  #   and/or 'profile' which select a profile section from 'file'.
  #   Specify the key :raise_noprofile to have an exception thrown
  #   if a given profile cannot be found. Otherwise that is ignored and
  #   options are built from other sources.
  #
  def initialize(options = {})
    @raise_noprofile = options[:raise_on_no_profile] || false
    raw = load_from_file(real_files(cred_files(options)),
                         options[:profile] || 'default')

    populate(env_override(raw))
  end

  # If the user has set certain environment variables, their
  # values will override values from the config file or
  # command-line.
  # @param raw [Hash] the existing credentials
  # @return [Hash] the modified credentials
  #
  def env_override(raw)
    { endpoint: 'WAVEFRONT_ENDPOINT',
      token: 'WAVEFRONT_TOKEN',
      proxy: 'WAVEFRONT_PROXY' }.each { |k, v| raw[k] = ENV[v] if ENV[v] }
    raw
  end

  # Make the helper values. We use a Map so they're super-easy to
  # access
  #
  # @param raw [Hash] the combined options from config file,
  #   command-line and env vars.
  # @return void
  #
  def populate(raw)
    creds_keys = %i[endpoint token]
    proxy_keys = %i[proxy port]
    all_keys = creds_keys + proxy_keys

    @config = Map(raw)
    @creds  = Map(raw.select { |k, _v| creds_keys.include?(k) })
    @proxy  = Map(raw.select { |k, _v| proxy_keys.include?(k) })
    @all    = Map(raw.select { |k, _v| all_keys.include?(k) })
  end

  # @return [Array] a list of possible credential files
  #
  def cred_files(opts = {})
    if opts.key?(:file)
      Array(Pathname.new(opts[:file]))
    else
      [Pathname.new('/etc/wavefront/credentials'),
       Pathname.new(ENV['HOME']) + '.wavefront.conf',
       Pathname.new(ENV['HOME']) + '.wavefront']
    end
  end

  def real_files(files)
    files.select { |f| f.exist? && f.file? }
  end

  # @param files [Array][Pathname] a list of ini-style config files
  # @param profile [String] a profile name
  # @param disallow_missing [Bool] whether or not to raise an exception if
  #   we are given a profile but can't find it.
  # @return [Hash] the given profile from the given list of files.
  #   If multiple files match, the last one will be used
  #
  def load_from_file(files, profile = 'default')
    ret = {}
    profiles_found = conf_files_found = 0

    files.each do |f|
      ret = load_profile(f, profile)
      conf_files_found += 1
      profiles_found += 1 unless ret.empty?
      ret[:file] = f
    end

    raise_on_missing_profile(profile, profiles_found, conf_files_found)
    ret
  end

  def raise_on_missing_profile(profile, profiles_found, conf_files_found)
    return true unless @raise_noprofile
    return true unless profiles_found.zero? && conf_files_found.positive?

    raise Wavefront::Exception::MissingConfigProfile, profile
  end

  # Load in an (optionally) given section of an ini-style configuration
  # file. If the section is not there, we don't consider that an error.
  #
  # @param file [Pathname] the file to read
  # @param profile [String] the section in the config to read
  # @return [Hash] options loaded from file. Each key becomes a symbol
  #
  def load_profile(file, profile = 'default')
    IniFile.load(file)[profile].transform_keys(&:to_sym)
  rescue StandardError
    raise Wavefront::Exception::InvalidConfigFile, file
  end
end

#opts ⇒ Object (readonly)

Returns the value of attribute opts.



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# File 'lib/wavefront-sdk/credentials.rb', line 21

def opts
  @opts
end

#proxy ⇒ Map (readonly)

Returns information for speaking to a Wavefront proxy.

Returns:

  • (Map) —

    information for speaking to a Wavefront proxy



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# File 'lib/wavefront-sdk/credentials.rb', line 20

class Credentials
  attr_reader :opts, :config, :creds, :proxy, :all

  # Gives you an object of credentials and options for speaking to
  # Wavefront. It will look in the following places:
  #
  # ~/.wavefront
  # ~/.wavefront.conf
  # /etc/wavefront/credentials
  # WAVEFRONT_ENDPOINT and WAVEFRONT_TOKEN environment variables
  #
  # @param options [Hash] keys may be 'file', which
  #   specifies a config file which will be loaded and parsed. If
  #   no file is supplied, those listed above will be used.;
  #   and/or 'profile' which select a profile section from 'file'.
  #   Specify the key :raise_noprofile to have an exception thrown
  #   if a given profile cannot be found. Otherwise that is ignored and
  #   options are built from other sources.
  #
  def initialize(options = {})
    @raise_noprofile = options[:raise_on_no_profile] || false
    raw = load_from_file(real_files(cred_files(options)),
                         options[:profile] || 'default')

    populate(env_override(raw))
  end

  # If the user has set certain environment variables, their
  # values will override values from the config file or
  # command-line.
  # @param raw [Hash] the existing credentials
  # @return [Hash] the modified credentials
  #
  def env_override(raw)
    { endpoint: 'WAVEFRONT_ENDPOINT',
      token: 'WAVEFRONT_TOKEN',
      proxy: 'WAVEFRONT_PROXY' }.each { |k, v| raw[k] = ENV[v] if ENV[v] }
    raw
  end

  # Make the helper values. We use a Map so they're super-easy to
  # access
  #
  # @param raw [Hash] the combined options from config file,
  #   command-line and env vars.
  # @return void
  #
  def populate(raw)
    creds_keys = %i[endpoint token]
    proxy_keys = %i[proxy port]
    all_keys = creds_keys + proxy_keys

    @config = Map(raw)
    @creds  = Map(raw.select { |k, _v| creds_keys.include?(k) })
    @proxy  = Map(raw.select { |k, _v| proxy_keys.include?(k) })
    @all    = Map(raw.select { |k, _v| all_keys.include?(k) })
  end

  # @return [Array] a list of possible credential files
  #
  def cred_files(opts = {})
    if opts.key?(:file)
      Array(Pathname.new(opts[:file]))
    else
      [Pathname.new('/etc/wavefront/credentials'),
       Pathname.new(ENV['HOME']) + '.wavefront.conf',
       Pathname.new(ENV['HOME']) + '.wavefront']
    end
  end

  def real_files(files)
    files.select { |f| f.exist? && f.file? }
  end

  # @param files [Array][Pathname] a list of ini-style config files
  # @param profile [String] a profile name
  # @param disallow_missing [Bool] whether or not to raise an exception if
  #   we are given a profile but can't find it.
  # @return [Hash] the given profile from the given list of files.
  #   If multiple files match, the last one will be used
  #
  def load_from_file(files, profile = 'default')
    ret = {}
    profiles_found = conf_files_found = 0

    files.each do |f|
      ret = load_profile(f, profile)
      conf_files_found += 1
      profiles_found += 1 unless ret.empty?
      ret[:file] = f
    end

    raise_on_missing_profile(profile, profiles_found, conf_files_found)
    ret
  end

  def raise_on_missing_profile(profile, profiles_found, conf_files_found)
    return true unless @raise_noprofile
    return true unless profiles_found.zero? && conf_files_found.positive?

    raise Wavefront::Exception::MissingConfigProfile, profile
  end

  # Load in an (optionally) given section of an ini-style configuration
  # file. If the section is not there, we don't consider that an error.
  #
  # @param file [Pathname] the file to read
  # @param profile [String] the section in the config to read
  # @return [Hash] options loaded from file. Each key becomes a symbol
  #
  def load_profile(file, profile = 'default')
    IniFile.load(file)[profile].transform_keys(&:to_sym)
  rescue StandardError
    raise Wavefront::Exception::InvalidConfigFile, file
  end
end

Instance Method Details

#cred_files(opts = {}) ⇒ Array

Returns a list of possible credential files.

Returns:

  • (Array) —

    a list of possible credential files



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# File 'lib/wavefront-sdk/credentials.rb', line 80

def cred_files(opts = {})
  if opts.key?(:file)
    Array(Pathname.new(opts[:file]))
  else
    [Pathname.new('/etc/wavefront/credentials'),
     Pathname.new(ENV['HOME']) + '.wavefront.conf',
     Pathname.new(ENV['HOME']) + '.wavefront']
  end
end

#env_override(raw) ⇒ Hash

If the user has set certain environment variables, their values will override values from the config file or command-line.

Parameters:

  • raw (Hash) —

    the existing credentials

Returns:

  • (Hash) —

    the modified credentials



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# File 'lib/wavefront-sdk/credentials.rb', line 53

def env_override(raw)
  { endpoint: 'WAVEFRONT_ENDPOINT',
    token: 'WAVEFRONT_TOKEN',
    proxy: 'WAVEFRONT_PROXY' }.each { |k, v| raw[k] = ENV[v] if ENV[v] }
  raw
end

#load_from_file(files, profile = 'default') ⇒ Hash

Returns the given profile from the given list of files. If multiple files match, the last one will be used.

Parameters:

  • files (Array) —
    Pathname

    a list of ini-style config files

  • profile (String) (defaults to: 'default') —

    a profile name

  • disallow_missing (Bool) —

    whether or not to raise an exception if we are given a profile but can’t find it.

Returns:

  • (Hash) —

    the given profile from the given list of files. If multiple files match, the last one will be used



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# File 'lib/wavefront-sdk/credentials.rb', line 101

def load_from_file(files, profile = 'default')
  ret = {}
  profiles_found = conf_files_found = 0

  files.each do |f|
    ret = load_profile(f, profile)
    conf_files_found += 1
    profiles_found += 1 unless ret.empty?
    ret[:file] = f
  end

  raise_on_missing_profile(profile, profiles_found, conf_files_found)
  ret
end

#load_profile(file, profile = 'default') ⇒ Hash

Load in an (optionally) given section of an ini-style configuration file. If the section is not there, we don’t consider that an error.

Parameters:

  • file (Pathname) —

    the file to read

  • profile (String) (defaults to: 'default') —

    the section in the config to read

Returns:

  • (Hash) —

    options loaded from file. Each key becomes a symbol



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# File 'lib/wavefront-sdk/credentials.rb', line 130

def load_profile(file, profile = 'default')
  IniFile.load(file)[profile].transform_keys(&:to_sym)
rescue StandardError
  raise Wavefront::Exception::InvalidConfigFile, file
end

#populate(raw) ⇒ Object

Make the helper values. We use a Map so they’re super-easy to access

Parameters:

  • raw (Hash) —

    the combined options from config file, command-line and env vars.

Returns:

  • void



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# File 'lib/wavefront-sdk/credentials.rb', line 67

def populate(raw)
  creds_keys = %i[endpoint token]
  proxy_keys = %i[proxy port]
  all_keys = creds_keys + proxy_keys

  @config = Map(raw)
  @creds  = Map(raw.select { |k, _v| creds_keys.include?(k) })
  @proxy  = Map(raw.select { |k, _v| proxy_keys.include?(k) })
  @all    = Map(raw.select { |k, _v| all_keys.include?(k) })
end

#raise_on_missing_profile(profile, profiles_found, conf_files_found) ⇒ Object

Raises:



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# File 'lib/wavefront-sdk/credentials.rb', line 116

def raise_on_missing_profile(profile, profiles_found, conf_files_found)
  return true unless @raise_noprofile
  return true unless profiles_found.zero? && conf_files_found.positive?

  raise Wavefront::Exception::MissingConfigProfile, profile
end

#real_files(files) ⇒ Object 



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# File 'lib/wavefront-sdk/credentials.rb', line 90

def real_files(files)
  files.select { |f| f.exist? && f.file? }
end