Class: Ask::Tools::Grep

Inherits:
Ask::Tool
  • Object
show all
Defined in:
lib/ask/tools/shell/grep.rb

Overview

Search file contents using a regex pattern.

Constant Summary collapse

MAX_MATCHES = 
100
MAX_LINE_LENGTH = 
500
EXCLUDE_DIRS = 
%w[.git node_modules vendor .bundle tmp log].freeze

Instance Method Summary collapse

Instance Method Details

#execute(pattern:, path: nil, include: nil) ⇒ Object 



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# File 'lib/ask/tools/shell/grep.rb', line 19

def execute(pattern:, path: nil, include: nil)
  base = path ? File.expand_path(path) : Dir.pwd

  unless File.directory?(base)
    return Ask::Result.error(message: "Directory does not exist: #{base}")
  end

  begin
    regex = Regexp.new(pattern, Regexp::IGNORECASE)
  rescue RegexpError => e
    return Ask::Result.error(message: "Invalid regex: #{e.message}")
  end

  matches = []
  glob = include || "**/*"

  Dir.glob(File.join(base, glob)).each do |file|
    next unless File.file?(file)
    next if EXCLUDE_DIRS.any? { |d| file.include?("/#{d}/") }

    begin
      File.readlines(file).each_with_index do |line, i|
        next unless regex.match?(line)
        line_text = line.chomp
        line_text = line_text[0, MAX_LINE_LENGTH] + "..." if line_text.length > MAX_LINE_LENGTH
        matches << "#{file}:#{i + 1}: #{line_text}"
        if matches.size >= MAX_MATCHES
          return Ask::Result.ok(data: matches.join("\n") + "\n... (too many matches)",
                                 metadata: { count: matches.size, truncated: true })
        end
      end
    rescue => e
      matches << "#{file}: error reading: #{e.message}"
    end
  end

  if matches.empty?
    return Ask::Result.error(message: "No matches found for: #{pattern}")
  end

  Ask::Result.ok(data: matches.join("\n"), metadata: { count: matches.size, truncated: false })
end