gistfile1.rb

# There is precious little documentation on how to use Grit to add files
# to a repository. Basically as far as I understand it the steps are:
#
# (1) Create a repository via 'git init' on the command line
# (2) Create a Grit::Repo object
# (3) Write one or more files to the directory the repository lives in
# (4) Create Grit::Blob objects that represent those files
# (5) Add the files to the index
# (6) Commit the index

require 'grit'

def add_file_to_repo(repo, file)
  filename = File.basename file
  repo_location = repo.path.gsub(/\.git$/, '')

  File.open("#{repo_location}/#{filename}", "w+") do |f|
    f << File.read(file)
  end

  blob = Grit::Blob.create(repo, {
                             :name => filename,
                             :data => ""
                           })


  repo.add(blob.name)
  repo.commit_index("added #{filename}")
end

REPO_DIR = "/tmp/repo"
repository = Grit::Repo.new(REPO_DIR)
add_file_to_repo(repository, "/etc/passwd")