make_test_branches.rb

require 'git'
require 'logger'

revert_branch_name = "origin/remove-failing-tests"

working_dir = '.'
g = Git.open(working_dir, :log => Logger.new(STDOUT))
base_commit = g.gcommit('5b78d2b')

branch_tip_commit = g.gcommit(revert_branch_name)

current_commit = branch_tip_commit

def apply_inverse_patch(g,sha)
  g.revert(sha, {strategy: 'ours'})
end

def make_commit(g, message, commit)
  full_message = message + "\n\n" +
  "This commit reverts and modifies #{commit.sha}"

  g.commit(full_message, {amend: true})
end

def push_branch

end

def cleanup(g)
  g.reset_hard('HEAD')
  g.checkout('master')
end

def replace_fail_status(g)
  `sed -i s/\\"fail\\"/\\"pass\\"/ test_cases/*`
  g.add('test_cases/*')
  g.commit(nil, {amend: true})
end

def make_pull_request_from_reverted_commit(g, commit)
  message = commit.message
  new_message = message.gsub("Remove", "Add")
  branch_name = new_message.downcase.gsub(" ", "-").delete('",')

  #patch = g.diff(commit, commit.parent).patch
  #patch = patch.gsub('"status": "fail"', '"status": "pass"')

  g.branch(branch_name).checkout

  if (g.gcommit('HEAD').sha == g.gcommit('master').sha)
    apply_inverse_patch(g, commit.sha)
    replace_fail_status(g)
    make_commit(g, new_message, commit)
  end
  cleanup(g)
  exit(0)
end

while (current_commit.sha != base_commit.sha) do
  cleanup(g)
  unless current_commit.sha =~ /f02bb3/ # exception commit that doesn't do what the rest do
    make_pull_request_from_reverted_commit(g, current_commit)
  end

  current_commit = current_commit.parent
end