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# From rails (http://rubyonrails.com)
#
# Improved by murphy
class CodeStatistics
TEST_TYPES = /\btest/i
# Create a new Code Statistic.
#
# Rakefile Example:
#
# desc 'Report code statistics (LOC) from the application'
# task :stats => :copy_files do
# require 'rake_helpers/code_statistics'
# CodeStatistics.new(
# ["Main", "lib"],
# ["Tests", "test"],
# ["Demos", "demo"]
# ).to_s
# end
def initialize(*pairs)
@pairs = pairs
@statistics = calculate_statistics
@total = if pairs.empty? then nil else calculate_total end
end
# Print a textual table viewing the stats
#
# Intended for console output.
def print
print_header
@pairs.each { |name, path| print_line name, @statistics[name] }
print_splitter
if @total
print_line 'Total', @total
print_splitter
end
print_code_test_stats
end
private
DEFAULT_FILE_PATTERN = /\.rb$/
def calculate_statistics
@pairs.inject({}) do |stats, (name, path, pattern)|
pattern ||= DEFAULT_FILE_PATTERN
path = File.join path, '*.rb'
stats[name] = calculate_directory_statistics path, pattern
stats
end
end
def calculate_directory_statistics directory, pattern = DEFAULT_FILE_PATTERN
stats = Hash.new 0
Dir[directory].each do |file_name|
p "Scanning #{file_name}..." if $DEBUG
next unless file_name =~ pattern
lines = codelines = classes = methods = 0
empty_lines = comment_lines = 0
comment_block = nil
File.readlines(file_name).each do |line|
lines += 1
case line
when /^=end\s/
comment_lines += 1
comment_block = nil
when comment_block
comment_lines += 1
when /^\s*class\b/: classes += 1
when /^\s*def\b/: methods += 1
when /^\s*#/: comment_lines += 1
when /^\s*$/: empty_lines += 1
when /^=begin\s/
comment_block = lines
comment_lines += 1
end
end
codelines = lines - comment_lines - empty_lines
stats[:lines] += lines
stats[:codelines] += codelines
stats[:classes] += classes
stats[:methods] += methods
stats[:files] += 1
end
stats
end
def calculate_total
total = Hash.new 0
@statistics.each_value { |pair| pair.each { |k, v| total[k] += v } }
total
end
def calculate_code
code_loc = 0
@statistics.each { |k, v| code_loc += v[:codelines] unless k[TEST_TYPES] }
code_loc
end
def calculate_tests
test_loc = 0
@statistics.each { |k, v| test_loc += v[:codelines] if k[TEST_TYPES] }
test_loc
end
def print_header
print_splitter
puts "| T=Test Name | Files | Lines | LOC | Classes | Methods | M/C | LOC/M |"
print_splitter
end
def print_splitter
puts "+---------------------------+-------+-------+-------+---------+---------+-----+-------+"
end
def print_line name, statistics
m_over_c = (statistics[:methods] / statistics[:classes]) rescue m_over_c = 0
loc_over_m = (statistics[:codelines] / statistics[:methods]) - 2 rescue loc_over_m = 0
if name[TEST_TYPES]
name = "T #{name}"
else
name = " #{name}"
end
line = "| %-25s | %5d | %5d | %5d | %7d | %7d | %3d | %5d |" % (
[name, *statistics.values_at(:files, :lines, :codelines, :classes, :methods)] +
[m_over_c, loc_over_m] )
puts line
end
def print_code_test_stats
code = calculate_code
tests = calculate_tests
puts " Code LOC = #{code} Test LOC = #{tests} Code:Test Ratio = [1 : #{sprintf("%.2f", tests.to_f/code)}]"
puts ""
end
end
# Run a test script.
if $0 == __FILE__
$VERBOSE = true
CodeStatistics.new(
['This dir', File.dirname(__FILE__)]
).print
end
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