Class: Babushka::MetaDep

Inherits:

Object

• Object
• Babushka::MetaDep

show all

Includes:

LogHelpers

Defined in:

lib/babushka/meta_dep.rb

Constant Summary

INVALID_NAMES =

%w[base]

VALID_NAME_START_CHARS =

/[a-z]/

VALID_NAME_CHARS =

/#{VALID_NAME_START_CHARS}[a-z0-9_]*/

VALID_NAME_START =

/^#{VALID_NAME_START_CHARS}/

VALID_NAME =

/\A#{VALID_NAME_CHARS}\z/m

TEMPLATE_NAME_MATCH =

/\A.+\.(#{VALID_NAME_CHARS})\z/m

Instance Attribute Summary (collapse)

• - (Object) context_class readonly

  Returns the value of attribute context_class.

• - (Object) name readonly

  Returns the value of attribute name.

• - (Object) opts readonly

  Returns the value of attribute opts.

• - (Object) source readonly

  Returns the value of attribute source.

Class Method Summary (collapse)

• + (Object) for(supplied_name, source, opts, &block)

Instance Method Summary (collapse)

• - (Object) build_context(block)
• - (Object) contextual_name

  Returns this template's name, including the source name as a prefix if this template is in a cloneable source.

• - (Object) desc
• - (MetaDep) initialize(name, source, opts, &block) constructor

  A new instance of MetaDep.

Methods included from LogHelpers

#debug, #log, #log_block, #log_error, #log_ok, #log_verbose, #log_warn

36
37
38
39
40
41

# File 'lib/babushka/meta_dep.rb', line 36

def initialize name, source, opts, &block
  @name, @source, @opts, @block = name, source, opts, block
  debug "Defining #{source.name}:#{name} template"
  @context_class = build_context block
  source.templates.register self
end

32
33
34

# File 'lib/babushka/meta_dep.rb', line 32

def context_class
  @context_class
end

32
33
34

# File 'lib/babushka/meta_dep.rb', line 32

def name
  @name
end

32
33
34

# File 'lib/babushka/meta_dep.rb', line 32

def opts
  @opts
end

32
33
34

# File 'lib/babushka/meta_dep.rb', line 32

def source
  @source
end

14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

# File 'lib/babushka/meta_dep.rb', line 14

def self.for supplied_name, source, opts, &block
  name = supplied_name.to_s.downcase

  if name.empty?
    raise ArgumentError, "You can't define a template with a blank name."
  elsif INVALID_NAMES.include? name
    raise ArgumentError, "You can't use '#{name}' for a template name, because it's reserved."
  elsif name[VALID_NAME_START].nil?
    raise ArgumentError, "You can't use '#{name}' for a template name - it must start with a letter."
  elsif name[VALID_NAME].nil?
    raise ArgumentError, "You can't use '#{name}' for a template name - it can only contain [a-z0-9_]."
  elsif Base.sources.current_load_source.templates.for(name)
    raise ArgumentError, "A template called '#{name}' has already been defined."
  else
    new name, source, opts, &block
  end
end

56
57
58
59
60
61
62
63

# File 'lib/babushka/meta_dep.rb', line 56

def build_context block
  Class.new(MetaDepContext, &block).tap {|context|
    shadow = self
    context.metaclass.send :define_method, :source_template do
      shadow
    end
  }
end

52
53
54

# File 'lib/babushka/meta_dep.rb', line 52

def contextual_name
  source.cloneable? ? "#{source.name}:#{name}" : name
end

34

# File 'lib/babushka/meta_dep.rb', line 34

def desc; context_class.desc end