Initial commit -- Prototype for code ownership

Basic RubyGem setup.

An initial prototype which determines the ownership of a segment of code
is present as a git command:

`git evolution <start_line> <end_line> <file_name>`

.gitignore

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+*.gem
+*.rbc
+/.config
+/coverage/
+/InstalledFiles
+/pkg/
+/spec/reports/
+/test/tmp/
+/test/version_tmp/
+/tmp/
+
+## Specific to RubyMotion:
+.dat*
+.repl_history
+build/
+
+## Documentation cache and generated files:
+/.yardoc/
+/_yardoc/
+/doc/
+/rdoc/
+
+## Environment normalisation:
+/.bundle/
+/lib/bundler/man/
+
+# for a library or gem, you might want to ignore these files since the code is
+# intended to run in multiple environments; otherwise, check them in:
+# Gemfile.lock
+# .ruby-version
+# .ruby-gemset
+
+# unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
+.rvmrc

.ruby-version

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+2.2.0

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in git_evolution.gemspec
+gemspec

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2015 Kevin Jalbert
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

README.md

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+# GitEvolution
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'git_evolution'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install git_evolution
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it ( https://github.com/kevinjalbert/git_evolution/fork )
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+

bin/git-evolution

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+#!/usr/bin/env ruby
+
+require 'git_evolution'
+
+GitEvolution.new.run(ARGV)

bin/git_evolution

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+#!/usr/bin/env ruby
+
+require 'git_evolution'
+
+GitEvolution.new.run(ARGV)

git_evolution.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'git_evolution/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = 'git_evolution'
+  spec.version       = GitEvolution::VERSION
+  spec.authors       = ['Kevin Jalbert']
+  spec.email         = ['[email protected]']
+  spec.summary       = 'Gem that provides the ability to determine the evolution of code within a git repository'
+  spec.description   = 'Gem that provides the ability to determine the evolution of code within a git repository'
+  spec.homepage      = ''
+  spec.license       = 'MIT'
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ['lib']
+
+  spec.add_development_dependency 'bundler', '~> 1.7'
+  spec.add_development_dependency 'rake', '~> 10.0'
+end

lib/git_evolution.rb

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+class GitEvolution
+  def run(args)
+    start_line = args[0]
+    end_line = args[1]
+    file = args[2]
+
+    results = `git --no-pager log -L#{start_line},#{end_line}:#{file} --follow #{file}`
+
+    commit_shas = results.scan(/^commit ([0-9a-f]{40})/)
+    commit_shas = commit_shas.flatten
+
+    commit_info = {}
+    commit_shas.each do |sha|
+      commit = `git --no-pager show -s --format=%an%n%n%at%n%n%s%n%n%b #{sha}`
+      commit_data = commit.split("\n\n")
+      commit_info[sha] = {
+        author: commit_data[0],
+        date: commit_data[1],
+        title: commit_data[2],
+        body: commit_data[3..-1].join
+      }
+    end
+
+    ownership = Hash.new(0)
+
+    puts 'Commits:'
+    commit_info.each do |sha, data|
+      puts "#{data[:author]} (#{Time.at(data[:date].to_i)}) - #{sha}"
+      puts "#{data[:title]}"
+      puts
+
+      ownership[data[:author]] = ownership[data[:author]] + 1
+    end
+
+    puts '-' * 80
+
+    puts
+    puts 'Ownership:'
+    ownership.each do |author, count|
+      puts "#{author} - #{count}/#{commit_info.size} (#{(count.to_f / commit_info.size * 100).round(2)}%)"
+    end
+  end
+end

lib/git_evolution/version.rb

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+class GitEvolution
+  VERSION = '0.0.1'
+end