Module: Linguist

Defined in:
lib/linguist/md5.rb,
lib/linguist/samples.rb,
lib/linguist/language.rb,
lib/linguist/file_blob.rb,
lib/linguist/generated.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, Repository, Tokenizer

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.



116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
 
# File 'lib/linguist/samples.rb', line 116

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