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require 'yaml'
module Linguist
module Strategy
# Detects language based on extension
class Extension
# Public: Use the file extension to detect the blob's language.
#
# blob - An object that quacks like a blob.
# candidates - A list of candidate languages.
#
# Examples
#
# Extension.call(FileBlob.new("path/to/file"))
#
# Returns an array of languages associated with a blob's file extension.
# Selected languages must be in the candidate list, except if it's empty,
# in which case any language is a valid candidate.
def self.call(blob, candidates)
return candidates if generic? blob.name.to_s
languages = Language.find_by_extension(blob.name.to_s)
candidates.any? ? candidates & languages : languages
end
# Public: Return true if filename uses a generic extension.
def self.generic?(filename)
self.load
@generic.any? { |ext| filename.downcase.end_with? ext }
end
@generic = []
# Internal: Load the contents of `generic.yml`
def self.load()
return if @generic.any?
data = YAML.load_file(File.expand_path("../../generic.yml", __FILE__))
@generic = data['extensions']
end
end
end
end
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