Class: Nero::EnvTag

Inherits:
BaseTag show all
Defined in:
lib/nero.rb

Instance Attribute Summary

Attributes inherited from BaseTag

#coder, #ctx, #options

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseTag

[], #args, #config, #init, #init_ctx, #init_with, #tag_name

Methods included from Resolvable

#deep_resolve, #gen_resolve_tryer, #resolve_nested!, #try_resolve

Class Method Details

.coerce_bool(v) ⇒ Object

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# File 'lib/nero.rb', line 198

def self.coerce_bool(v)
  return false unless v

  re_true = /y|Y|yes|Yes|YES|true|True|TRUE|on|On|ON/
  re_false = /n|N|no|No|NO|false|False|FALSE|off|Off|OFF/

  case v
  when TrueClass, FalseClass then v
  when re_true then true
  when re_false then false
  else
    raise "bool value should be one of y(es)/n(o), on/off, true/false (got #{v.inspect})"
  end
end

.env_value(k, fallback = nil, optional: false) ⇒ Object

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# File 'lib/nero.rb', line 190

def self.env_value(k, fallback = nil, optional: false)
  if fallback.nil? && !optional
    ENV.fetch(k)
  else
    ENV.fetch(k, fallback)
  end
end

Instance Method Details

#coercer ⇒ Object

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# File 'lib/nero.rb', line 167

def coercer
  return unless @coerce

  @coercer ||= case @coerce
  when Symbol then @coerce.to_proc
  else
    @coerce
  end
end

#env_value ⇒ Object

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# File 'lib/nero.rb', line 186

def env_value
  self.class.env_value(*args, optional:)
end

#init_options(coerce: nil) ⇒ Object

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# File 'lib/nero.rb', line 177

def init_options(coerce: nil)
  @coerce = coerce
end

#optional ⇒ Object Also known as: optional?

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# File 'lib/nero.rb', line 181

def optional
  tag_name.end_with?("?") || !!ENV["NERO_ENV_ALL_OPTIONAL"]
end

#resolve ⇒ Object

Options:

  • coerce - symbol or proc to be applied to value of env-var. when using ceroce, the block is ignoerd.

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# File 'lib/nero.rb', line 157

def resolve(**)
  if coercer
    coercer.call(env_value) unless env_value.nil?
  elsif ctx.dig(:tags, tag_name, :block)
    super
  else
    env_value
  end
end