class CodeStatisticsCalculator #:nodoc:
attr_reader :lines, :code_lines, :classes, :methods
PATTERNS = {
rb: {
line_comment: /^\s*#/,
begin_block_comment: /^=begin/,
end_block_comment: /^=end/,
class: /^\s*class\s+[_A-Z]/,
method: /^\s*def\s+[_a-z]/,
},
js: {
line_comment: %r{^\s*//},
begin_block_comment: %r{^\s*/\*},
end_block_comment: %r{\*/},
method: /function(\s+[_a-zA-Z][\da-zA-Z]*)?\s*\(/,
},
coffee: {
line_comment: /^\s*#/,
begin_block_comment: /^\s*###/,
end_block_comment: /^\s*###/,
class: /^\s*class\s+[_A-Z]/,
method: /[-=]>/,
}
}
PATTERNS[:minitest] = PATTERNS[:rb].merge method: /^\s*(def|test)\s+['"_a-z]/
def initialize(lines = 0, code_lines = 0, classes = 0, methods = 0)
@lines = lines
@code_lines = code_lines
@classes = classes
@methods = methods
end
def add(code_statistics_calculator)
@lines += code_statistics_calculator.lines
@code_lines += code_statistics_calculator.code_lines
@classes += code_statistics_calculator.classes
@methods += code_statistics_calculator.methods
end
def add_by_file_path(file_path)
File.open(file_path) do |f|
self.add_by_io(f, file_type(file_path))
end
end
def add_by_io(io, file_type)
patterns = PATTERNS[file_type] || {}
comment_started = false
while line = io.gets
@lines += 1
if comment_started
if patterns[:end_block_comment] && line =~ patterns[:end_block_comment]
comment_started = false
end
next
else
if patterns[:begin_block_comment] && line =~ patterns[:begin_block_comment]
comment_started = true
next
end
end
@classes += 1 if patterns[:class] && line =~ patterns[:class]
@methods += 1 if patterns[:method] && line =~ patterns[:method]
if line !~ /^\s*$/ && (patterns[:line_comment].nil? || line !~ patterns[:line_comment])
@code_lines += 1
end
end
end
private
def file_type(file_path)
if file_path.end_with? '_test.rb'
:minitest
else
File.extname(file_path).sub(/\A\./, '').downcase.to_sym
end
end
end
