Contents

module GitHubRecordsArchiver
  class GitError < StandardError; end

  class GitRepository
    def clone
      if Dir.exist? repo_dir # Repo already exists, just pull new objects
        Dir.chdir repo_dir do
          git 'pull'
        end
      else # Clone Git content from scratch
        git 'clone', clone_url, repo_dir
      end
    end

    def repo_dir
      raise 'Not implemented'
    end

    private

    def clone_url
      raise 'Not implemented'
    end

    # There's a bug, whereby if you attempt to clone a wiki that's enabled
    # but has not yet been initialized, GitHub returns a remote error
    # Rather than let this break the export, capture the error and continue
    def wiki_does_not_exist?(output)
      expected = '^fatal: remote error: access denied or repository not '
      expected << "exported: .*?\.wiki\.git$"
      output =~ /#{expected}/
    end

    # Attempting to clone an empty repo will rightfulyl fail at the Git level
    # But we shouldn't let that fail the archive operation
    def empty_repo?(output)
      expected = 'Your configuration specifies to merge with the ref '
      expected << "'refs/heads/master'\n"
      expected << 'from the remote, but no such ref was fetched.'
      output =~ Regexp.new(expected)
    end

    # Run a git command, piping output to stdout
    def git(*args)
      output, status = Open3.capture2e('git', *args)
      return false if empty_repo?(output) || wiki_does_not_exist?(output)
      raise GitError, output if status.exitstatus != 0
      output
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
github_records_archiver-0.1.0	lib/github_records_archiver/git_repository.rb