Created
March 9, 2011 15:58
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Output the complexity trend of an individual method across its history
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| #!/usr/bin/env ruby | |
| # Print the complexity over time for a Ruby method in a | |
| # git repository. | |
| # | |
| # Requires: >= bash ?.? | |
| # >= git 1.7.1 | |
| # >= ruby 1.9.2 | |
| # >= flog 2.5.0 | |
| # | |
| require 'flog' | |
| require 'time' | |
| TEMP_FILE = "/tmp/methodshark_junk.rb" | |
| class MethodShark | |
| class Reporter < ::StringIO | |
| def initialize(methodname) | |
| super() | |
| @detector = Regexp.new('\s+(\d+.\d+):\s+' + methodname) | |
| end | |
| def score | |
| text = string.scan(@detector).flatten.first | |
| text ? Float(text) : 0.0 | |
| end | |
| end | |
| def self.trail_for(filename, methodname) | |
| new(filename, methodname).generate_datestamped_complexities.sort | |
| end | |
| def initialize(filename, methodname) | |
| @filename = filename | |
| @methodname = methodname | |
| end | |
| def generate_datestamped_complexities | |
| # Bin-ing all commits on a date as we're just looking at trend | |
| complexities = {} | |
| sha1s_of_commits.each do |sha1| | |
| complexities[commit_date_of(sha1)] = complexity_of(sha1) | |
| end | |
| complexities | |
| end | |
| def commit_date_of(sha1) | |
| Time.parse(`git show -s --format=%cd #{sha1}`) | |
| end | |
| def complexity_of(sha1) | |
| `git show #{sha1}:#{@filename} > #{TEMP_FILE}` | |
| flogger = Flog.new({ :all => true }) | |
| reporter = Reporter.new(@methodname) | |
| flogger.flog(TEMP_FILE) | |
| flogger.report(reporter) | |
| reporter.score | |
| end | |
| def sha1s_of_commits | |
| @sha1s ||= `git log #{@filename}| grep ^commit`.split(/\n/).map(&:split).map {|fields| fields[sha1_column = 1] } | |
| end | |
| end | |
| if ARGV.size != 2 | |
| puts "help: methodshark <rubyfilename> <methodname>" | |
| puts "" | |
| puts " Run in a git repository folder" | |
| puts "" | |
| puts " Ex. methodshark app/models/flubber.rb Foo#bar!" | |
| puts " methodshark app/models/flubber.rb no_foo?" | |
| puts "" | |
| exit | |
| end | |
| MethodShark.trail_for(ARGV[0], ARGV[1]).each do |date,complexity| | |
| puts "#{date.strftime("%D")},#{complexity}" | |
| end |
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One step from here to knowing who the committer was... would that be bad karma?