This is a playground for me to try to git a `git log -- [path]` equivalent from Rugged

Gemfile

gem 'rugged', :path => '../rugged'

git-log-path-rugged.rb

#!ruby
#
# History
# 
# This is a playground for me to try to git a `git log -- [path]` equivalent from Rugged

require 'rugged'

repo = Rugged::Repository.new(ARGV[0])
path = ARGV[1]

puts "Looking for the file named: #{path} in Repository: #{repo}"

versions = []

walker = Rugged::Walker.new(repo)
walker.push(repo.head.target)

walker.each do |commit|
  commit.tree.walk(:preorder) do |root, entry|
    if root + entry[:name] == path
      commit.parents.each do |parent|
        parent = repo.lookup(parent.oid)

        parent.tree.each_blob do |parent_blob|
          if parent_blob[:name] == entry[:name] and parent_blob[:oid] != entry[:oid]
            # Add the commit to the list of versions
            versions << commit if not versions.include?(commit)
          end
        end
      end
    end
  end
end

puts "There are #{versions.size} commits affecting your file going back from the head ref"

versions.each do |version|
  puts "#{version.oid} #{version.message.split(/\r?\n/)[0]}"
end