Class: RuboCop::TargetFinder

Inherits:
Object
  • Object
show all
Defined in:
lib/rubocop/target_finder.rb

Overview

This class finds target files to inspect by scanning the directory tree and picking ruby files.

Instance Method Summary collapse

Constructor Details

#initialize(config_store, options = {}) ⇒ TargetFinder

Returns a new instance of TargetFinder.


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# File 'lib/rubocop/target_finder.rb', line 9

def initialize(config_store, options = {})
  @config_store = config_store
  @options = options
end

Instance Method Details

#debug?Boolean

Returns:

  • (Boolean)

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# File 'lib/rubocop/target_finder.rb', line 18

def debug?
  @options[:debug]
end

#excluded_dirs(base_dir) ⇒ Object


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# File 'lib/rubocop/target_finder.rb', line 111

def excluded_dirs(base_dir)
  all_cops_config = @config_store.for(base_dir)['AllCops']
  dir_tree_excludes = all_cops_config['Exclude'].select do |pattern|
    pattern.is_a?(String) && pattern.end_with?('/**/*')
  end
  dir_tree_excludes.map { |pattern| pattern.sub(%r{/\*\*/\*$}, '') }
end

#fail_fast?Boolean

Returns:

  • (Boolean)

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# File 'lib/rubocop/target_finder.rb', line 22

def fail_fast?
  @options[:fail_fast]
end

#find(args) ⇒ Array

Generate a list of target files by expanding globbing patterns (if any). If args is empty, recursively find all Ruby source files under the current directory

Returns:

  • (Array)

    array of file paths


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# File 'lib/rubocop/target_finder.rb', line 30

def find(args)
  return target_files_in_dir if args.empty?

  files = []

  args.uniq.each do |arg|
    files += if File.directory?(arg)
               target_files_in_dir(arg.chomp(File::SEPARATOR))
             else
               process_explicit_path(arg)
             end
  end

  files.map { |f| File.expand_path(f) }.uniq
end

#find_files(base_dir, flags) ⇒ Object

Search for files recursively starting at the given base directory using the given flags that determine how the match is made. Excluded files will be removed later by the caller, but as an optimization find_files removes the top level directories that are excluded in configuration in the normal way (dir/*/).


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# File 'lib/rubocop/target_finder.rb', line 88

def find_files(base_dir, flags)
  wanted_toplevel_dirs = toplevel_dirs(base_dir, flags) -
                         excluded_dirs(base_dir)
  wanted_toplevel_dirs.map! { |dir| dir << '/**/*' }

  pattern = if wanted_toplevel_dirs.empty?
              # We need this special case to avoid creating the pattern
              # /**/* which searches the entire file system.
              ["#{base_dir}/**/*"]
            else
              # Search the non-excluded top directories, but also add files
              # on the top level, which would otherwise not be found.
              wanted_toplevel_dirs.unshift("#{base_dir}/*")
            end
  Dir.glob(pattern, flags).select { |path| FileTest.file?(path) }
end

#force_exclusion?Boolean

Returns:

  • (Boolean)

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# File 'lib/rubocop/target_finder.rb', line 14

def force_exclusion?
  @options[:force_exclusion]
end

#process_explicit_path(path) ⇒ Object


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# File 'lib/rubocop/target_finder.rb', line 128

def process_explicit_path(path)
  files = if path.include?('*')
            Dir[path]
          else
            [path]
          end

  return files unless force_exclusion?

  files.reject do |file|
    config = @config_store.for(file)
    config.file_to_exclude?(file)
  end
end

#ruby_executable?(file) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/rubocop/target_finder.rb', line 119

def ruby_executable?(file)
  return false unless File.extname(file).empty?
  first_line = File.open(file, &:readline)
  first_line =~ /#!.*ruby/
rescue EOFError, ArgumentError => e
  warn "Unprocessable file #{file}: #{e.class}, #{e.message}" if debug?
  false
end

#target_files_in_dir(base_dir = Dir.pwd) ⇒ Array

Finds all Ruby source files under the current or other supplied directory. A Ruby source file is defined as a file with the .rb extension or a file with no extension that has a ruby shebang line as its first line. It is possible to specify includes and excludes using the config file, so you can include other Ruby files like Rakefiles and gemspecs.

Parameters:

  • base_dir (defaults to: Dir.pwd)

    Root directory under which to search for ruby source files

Returns:

  • (Array)

    Array of filenames


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# File 'lib/rubocop/target_finder.rb', line 55

def target_files_in_dir(base_dir = Dir.pwd)
  # Support Windows: Backslashes from command-line -> forward slashes
  if File::ALT_SEPARATOR
    base_dir.gsub!(File::ALT_SEPARATOR, File::SEPARATOR)
  end
  all_files = find_files(base_dir, File::FNM_DOTMATCH)
  hidden_files = Set.new(all_files - find_files(base_dir, 0))
  base_dir_config = @config_store.for(base_dir)

  target_files = all_files.select do |file|
    to_inspect?(file, hidden_files, base_dir_config)
  end

  # Most recently modified file first.
  target_files.sort_by! { |path| -File.mtime(path).to_i } if fail_fast?

  target_files
end

#to_inspect?(file, hidden_files, base_dir_config) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/rubocop/target_finder.rb', line 74

def to_inspect?(file, hidden_files, base_dir_config)
  return false if base_dir_config.file_to_exclude?(file)
  unless hidden_files.include?(file)
    return true if File.extname(file) == '.rb'
    return true if ruby_executable?(file)
  end
  base_dir_config.file_to_include?(file)
end

#toplevel_dirs(base_dir, flags) ⇒ Object


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# File 'lib/rubocop/target_finder.rb', line 105

def toplevel_dirs(base_dir, flags)
  Dir.glob(File.join(base_dir, '*'), flags).select do |dir|
    File.directory?(dir) && !(dir.end_with?('/.') || dir.end_with?('/..'))
  end
end