Class: Fcom::Querier

Inherits:
Object
  • Object
show all
Includes:
OptionsHelpers, MemoWise
Defined in:
lib/fcom/querier.rb

Overview

This class executes a system command to retrieve the git history, which is passed through ‘rg` (ripgrep), and then ultimately is fed back to `fcom` for parsing.

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Querier

Returns a new instance of Querier.



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# File 'lib/fcom/querier.rb', line 14

def initialize(options)
  @options = options
end

Instance Method Details

#query ⇒ Object 



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# File 'lib/fcom/querier.rb', line 18

def query
  expression_to_match = search_string
  expression_to_match = Regexp.escape(expression_to_match).gsub('\\ ', ' ') unless regex_mode?

  if expression_to_match.nil? || expression_to_match.empty?
    puts('provide expression to match as first argument')
    exit
  end

  quote = expression_to_match.include?('"') ? "'" : '"'

  commands =
    filename_by_most_recent_containing_commit.map do |commit, path_at_commit|
      commit_without_caret = commit.first(40)

      start_of_log =
        filtered_renames.
          drop_while { it.first != commit_without_caret }.
          detect { it.last == path_at_commit }&.
          first ||
        first_commit_sha

      <<~COMMAND.squish
        git rev-list #{start_of_log} #{commit} |

        git log
          --format="commit %s|%H|%an|%cr (%ci)"
          --patch
          --full-diff
          --diff-algorithm=default
          --topo-order
          --no-textconv
          --stdin
          #{%(--author="#{author}") if author}
          #{days_limiter}
          --
          #{path_at_commit}
          |

        rg #{quote}(#{expression_to_match})|(^commit )|(^diff )#{quote}
          --color never
          #{'--ignore-case' if ignore_case?}
          #{@options[:rg_options]}
          |

        #{File.join(__dir__, '../../exe/') if development?}fcom #{quote}#{search_string}#{quote}
          #{"--days #{days}" if days}
          #{'--regex' if regex_mode?}
          #{'--debug' if debug?}
          #{'--ignore-case' if ignore_case?}
          --path #{path_at_commit}
          --parse-mode
          --repo #{repo}
      COMMAND
    end

  a_previous_command_generated_output_not_yet_spaced = false

  commands.each do |command|
    Fcom.logger.debug("Executing command: #{command}")

    PTY.spawn(command) do |stdout, _stdin, _pid|
      # Read first byte to detect any output
      first_byte = stdout.read(1)

      if first_byte
        # Add spacing if needed
        if a_previous_command_generated_output_not_yet_spaced
          print "\n\n"
        end

        a_previous_command_generated_output_not_yet_spaced = true

        print(first_byte)

        # Now read the rest line by line
        stdout.each_line { puts(it) }
      end
    rescue Errno::EIO
      # The command produced no output.
    end
  end
end