diff options
Diffstat (limited to 'railties/lib/source_annotation_extractor.rb')
| -rw-r--r-- | railties/lib/source_annotation_extractor.rb | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/railties/lib/source_annotation_extractor.rb b/railties/lib/source_annotation_extractor.rb index 8844226536..591fd6f6bd 100644 --- a/railties/lib/source_annotation_extractor.rb +++ b/railties/lib/source_annotation_extractor.rb @@ -1,5 +1,26 @@ +# Implements the logic behind the rake tasks for annotations like +# +# rake notes +# rake notes:optimize +# +# and friends. See <tt>rake -T notes</tt> and <tt>railties/lib/tasks/annotations.rake</tt>. +# +# Annotation objects are triplets <tt>:line</tt>, <tt>:tag</tt>, <tt>:text</tt> that +# represent the line where the annotation lives, its tag, and its text. Note +# the filename is not stored. +# +# Annotations are looked for in comments and modulus whitespace they have to +# start with the tag optionally followed by a colon. Everything up to the end +# of the line (or closing ERb comment tag) is considered to be their text. class SourceAnnotationExtractor class Annotation < Struct.new(:line, :tag, :text) + + # Returns a representation of the annotation that looks like this: + # + # [126] [TODO] This algorithm is simple and clearly correct, make it faster. + # + # If +options+ has a flag <tt>:tag</tt> the tag is shown as in the example above. + # Otherwise the string contains just line and text. def to_s(options={}) s = "[%3d] " % line s << "[#{tag}] " if options[:tag] @@ -7,6 +28,12 @@ class SourceAnnotationExtractor end end + # Prints all annotations with tag +tag+ under the root directories +app+, +lib+, + # and +test+ (recursively). Only filenames with extension +.builder+, +.rb+, + # +.rxml+, +.rjs+, +.rhtml+, or +.erb+ are taken into account. The +options+ + # hash is passed to each annotation's +to_s+. + # + # This class method is the single entry point for the rake tasks. def self.enumerate(tag, options={}) extractor = new(tag) extractor.display(extractor.find, options) @@ -18,10 +45,18 @@ class SourceAnnotationExtractor @tag = tag end + # Returns a hash that maps filenames under +dirs+ (recursively) to arrays + # with their annotations. Only files with annotations are included, and only + # those with extension +.builder+, +.rb+, +.rxml+, +.rjs+, +.rhtml+, and +.erb+ + # are taken into account. def find(dirs=%w(app lib test)) dirs.inject({}) { |h, dir| h.update(find_in(dir)) } end + # Returns a hash that maps filenames under +dir+ (recursively) to arrays + # with their annotations. Only files with annotations are included, and only + # those with extension +.builder+, +.rb+, +.rxml+, +.rjs+, +.rhtml+, and +.erb+ + # are taken into account. def find_in(dir) results = {} @@ -40,6 +75,9 @@ class SourceAnnotationExtractor results end + # If +file+ is the filename of a file that contains annotations this method returns + # a hash with a single entry that maps +file+ to an array of its annotations. + # Otherwise it returns an empty hash. def extract_annotations_from(file, pattern) lineno = 0 result = File.readlines(file).inject([]) do |list, line| @@ -50,6 +88,8 @@ class SourceAnnotationExtractor result.empty? ? {} : { file => result } end + # Prints the mapping from filenames to annotations in +results+ ordered by filename. + # The +options+ hash is passed to each annotation's +to_s+. def display(results, options={}) results.keys.sort.each do |file| puts "#{file}:" |