Class: HclVariables::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/hcl_variables/parser.rb

Constant Summary collapse

COMMENT_REGEX = 
/^(^|\s)#/i

Instance Method Summary collapse

Constructor Details

#initialize(raw) ⇒ Parser

Returns a new instance of Parser.



5
6
7
 
# File 'lib/hcl_variables/parser.rb', line 5

def initialize(raw)
  @raw = raw
end

Instance Method Details

#code ⇒ Object

The parser being used cannot handle unquoted literal type values and comments. Hacking it and updating the raw code as a workaround. May have to fix the parser or write a new parser.



17
18
19
20
 
# File 'lib/hcl_variables/parser.rb', line 17

def code
  return @code if @code
  @code = fix_quotes(@raw)
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


22
23
24
25
26
27
 
# File 'lib/hcl_variables/parser.rb', line 22

def empty?
  text = remove_comments(code)
  lines = text.split("\n")
  lines.reject! { |l| l.strip.empty? }
  lines.empty?
end

#fix_quotes(raw) ⇒ Object 



39
40
41
42
43
44
45
 
# File 'lib/hcl_variables/parser.rb', line 39

def fix_quotes(raw)
  lines = raw.split("\n")
  lines.map! do |l|
    quote_line(l)
  end
  lines.join("\n")
end

#load ⇒ Object 



9
10
11
12
 
# File 'lib/hcl_variables/parser.rb', line 9

def load
  return {} if empty? # Rhcl parser cannot handle empty file
  Rhcl.parse(code)
end

#quote_line(l) ⇒ Object 



47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
# File 'lib/hcl_variables/parser.rb', line 47

def quote_line(l)
  return "# " if l =~ COMMENT_REGEX # return empty comment so parser wont try to parse it
  return l unless l =~ /type\s*=/ # just check for type
  return l if l =~ /type\s*=\s*['"]([a-zA-Z0-9()]+)["']/ # check quotes in the type value

  # Reaching here means there is probably a type value without quotes
  # Try to capture unquoted value so we can add quotes
  md = l.match(/type\s*=\s*([a-zA-Z0-9()]+)/)
  if md
    value = md[1]
    %Q|type = "#{value}"|
  else
    # Example: type = "list(object({
    l # unable to capture quotes, passthrough as fallback
  end
end

#remove_comments(raw) ⇒ Object 



30
31
32
33
34
35
36
37
 
# File 'lib/hcl_variables/parser.rb', line 30

def remove_comments(raw)
  lines = raw.split("\n")
  # filter out commented lines
  lines.reject! { |l| l =~ COMMENT_REGEX }
  # filter out empty lines
  lines.reject! { |l| l.strip.empty? }
  lines.join("\n")
end