Module: Linguist

Defined in:
lib/linguist/md5.rb,
lib/linguist/samples.rb,
lib/linguist/version.rb,
lib/linguist/language.rb,
lib/linguist/file_blob.rb,
lib/linguist/generated.rb,
lib/linguist/lazy_blob.rb,
lib/linguist/tokenizer.rb,
lib/linguist/classifier.rb,
lib/linguist/heuristics.rb,
lib/linguist/repository.rb,
lib/linguist/blob_helper.rb

Defined Under Namespace

Modules: BlobHelper, MD5, Samples Classes: Classifier, FileBlob, Generated, Heuristics, Language, LazyBlob, Repository, Tokenizer

Constant Summary collapse

VERSION = 
"3.2.1"

Class Method Summary collapse

Class Method Details

.interpreter_from_shebang(data) ⇒ Object

Used to retrieve the interpreter from the shebang line of a file’s data.



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# File 'lib/linguist/samples.rb', line 118

def self.interpreter_from_shebang(data)
  lines = data.lines.to_a

  if lines.any? && (match = lines[0].match(/(.+)\n?/)) && (bang = match[0]) =~ /^#!/
    bang.sub!(/^#! /, '#!')
    tokens = bang.split(' ')
    pieces = tokens.first.split('/')

    if pieces.size > 1
      script = pieces.last
    else
      script = pieces.first.sub('#!', '')
    end

    script = script == 'env' ? tokens[1] : script

    # "python2.6" -> "python"
    if script =~ /((?:\d+\.?)+)/
      script.sub! $1, ''
    end

    # Check for multiline shebang hacks that call `exec`
    if script == 'sh' &&
      lines[0...5].any? { |l| l.match(/exec (\w+).+\$0.+\$@/) }
      script = $1
    end

    script
  else
    nil
  end
end