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162 lines
5.9 KiB
Ruby
162 lines
5.9 KiB
Ruby
# frozen_string_literal: true
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require "active_support/deprecation"
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module Rails
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# Implements the logic behind <tt>Rails::Command::NotesCommand</tt>. See <tt>rails notes --help</tt> for usage information.
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#
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# Annotation objects are triplets <tt>:line</tt>, <tt>:tag</tt>, <tt>:text</tt> that
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# represent the line where the annotation lives, its tag, and its text. Note
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# the filename is not stored.
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#
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# Annotations are looked for in comments and modulus whitespace they have to
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# start with the tag optionally followed by a colon. Everything up to the end
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# of the line (or closing ERB comment tag) is considered to be their text.
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class SourceAnnotationExtractor
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class Annotation < Struct.new(:line, :tag, :text)
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def self.directories
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@@directories ||= %w(app config db lib test)
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end
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# Registers additional directories to be included
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# Rails::SourceAnnotationExtractor::Annotation.register_directories("spec", "another")
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def self.register_directories(*dirs)
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directories.push(*dirs)
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end
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def self.tags
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@@tags ||= %w(OPTIMIZE FIXME TODO)
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end
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# Registers additional tags
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# Rails::SourceAnnotationExtractor::Annotation.register_tags("TESTME", "DEPRECATEME")
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def self.register_tags(*additional_tags)
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tags.push(*additional_tags)
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end
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def self.extensions
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@@extensions ||= {}
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end
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# Registers new Annotations File Extensions
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# Rails::SourceAnnotationExtractor::Annotation.register_extensions("css", "scss", "sass", "less", "js") { |tag| /\/\/\s*(#{tag}):?\s*(.*)$/ }
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def self.register_extensions(*exts, &block)
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extensions[/\.(#{exts.join("|")})$/] = block
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end
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register_extensions("builder", "rb", "rake", "yml", "yaml", "ruby") { |tag| /#\s*(#{tag}):?\s*(.*)$/ }
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register_extensions("css", "js") { |tag| /\/\/\s*(#{tag}):?\s*(.*)$/ }
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register_extensions("erb") { |tag| /<%\s*#\s*(#{tag}):?\s*(.*?)\s*%>/ }
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# Returns a representation of the annotation that looks like this:
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#
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# [126] [TODO] This algorithm is simple and clearly correct, make it faster.
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#
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# If +options+ has a flag <tt>:tag</tt> the tag is shown as in the example above.
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# Otherwise the string contains just line and text.
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def to_s(options = {})
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s = +"[#{line.to_s.rjust(options[:indent])}] "
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s << "[#{tag}] " if options[:tag]
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s << text
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end
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# Used in annotations.rake
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#:nodoc:
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def self.notes_task_deprecation_warning
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ActiveSupport::Deprecation.warn("This rake task is deprecated and will be removed in Rails 6.1. \nRefer to `rails notes --help` for more information.\n")
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puts "\n"
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end
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end
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# Prints all annotations with tag +tag+ under the root directories +app+,
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# +config+, +db+, +lib+, and +test+ (recursively).
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#
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# If +tag+ is <tt>nil</tt>, annotations with either default or registered tags are printed.
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#
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# Specific directories can be explicitly set using the <tt>:dirs</tt> key in +options+.
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#
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# Rails::SourceAnnotationExtractor.enumerate 'TODO|FIXME', dirs: %w(app lib), tag: true
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#
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# If +options+ has a <tt>:tag</tt> flag, it will be passed to each annotation's +to_s+.
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#
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# See <tt>#find_in</tt> for a list of file extensions that will be taken into account.
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#
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# This class method is the single entry point for the `rails notes` command.
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def self.enumerate(tag = nil, options = {})
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tag ||= Annotation.tags.join("|")
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extractor = new(tag)
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dirs = options.delete(:dirs) || Annotation.directories
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extractor.display(extractor.find(dirs), options)
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end
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attr_reader :tag
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def initialize(tag)
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@tag = tag
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end
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# Returns a hash that maps filenames under +dirs+ (recursively) to arrays
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# with their annotations.
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def find(dirs)
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dirs.inject({}) { |h, dir| h.update(find_in(dir)) }
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end
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# Returns a hash that maps filenames under +dir+ (recursively) to arrays
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# with their annotations. Files with extensions registered in
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# <tt>Rails::SourceAnnotationExtractor::Annotation.extensions</tt> are
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# taken into account. Only files with annotations are included.
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def find_in(dir)
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results = {}
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Dir.glob("#{dir}/*") do |item|
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next if File.basename(item).start_with?(".")
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if File.directory?(item)
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results.update(find_in(item))
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else
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extension = Annotation.extensions.detect do |regexp, _block|
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regexp.match(item)
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end
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if extension
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pattern = extension.last.call(tag)
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results.update(extract_annotations_from(item, pattern)) if pattern
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end
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end
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end
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results
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end
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# If +file+ is the filename of a file that contains annotations this method returns
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# a hash with a single entry that maps +file+ to an array of its annotations.
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# Otherwise it returns an empty hash.
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def extract_annotations_from(file, pattern)
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lineno = 0
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result = File.readlines(file, encoding: Encoding::BINARY).inject([]) do |list, line|
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lineno += 1
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next list unless line =~ pattern
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list << Annotation.new(lineno, $1, $2)
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end
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result.empty? ? {} : { file => result }
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end
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# Prints the mapping from filenames to annotations in +results+ ordered by filename.
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# The +options+ hash is passed to each annotation's +to_s+.
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def display(results, options = {})
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options[:indent] = results.flat_map { |f, a| a.map(&:line) }.max.to_s.size
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results.keys.sort.each do |file|
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puts "#{file}:"
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results[file].each do |note|
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puts " * #{note.to_s(options)}"
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end
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puts
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end
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end
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end
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end
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# Remove this deprecated class in the next minor version
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#:nodoc:
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SourceAnnotationExtractor = ActiveSupport::Deprecation::DeprecatedConstantProxy.
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new("SourceAnnotationExtractor", "Rails::SourceAnnotationExtractor")
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