Class: Linguist::Generated

Inherits:
Object
  • Object
show all
Defined in:
lib/linguist/generated.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, data) ⇒ Generated

Internal: Initialize Generated instance

name - String filename data - String blob data



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# File 'lib/linguist/generated.rb', line 19

def initialize(name, data)
  @name = name
  @extname = File.extname(name)
  @_data = data
end

Instance Attribute Details

#extname ⇒ Object (readonly)

Returns the value of attribute extname.



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# File 'lib/linguist/generated.rb', line 25

def extname
  @extname
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/linguist/generated.rb', line 25

def name
  @name
end

Class Method Details

.generated?(name, data) ⇒ Boolean

Public: Is the blob a generated file?

name - String filename data - String blob data. A block also maybe passed in for lazy

loading. This behavior is deprecated and you should always
pass in a String.

Return true or false



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# File 'lib/linguist/generated.rb', line 11

def self.generated?(name, data)
  new(name, data).generated?
end

Instance Method Details

#compiled_coffeescript? ⇒ Boolean

Internal: Is the blob of JS generated by CoffeeScript?

CoffeeScript is meant to output JS that would be difficult to tell if it was generated or not. Look for a number of patterns output by the CS compiler.

Return true or false



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# File 'lib/linguist/generated.rb', line 104

def compiled_coffeescript?
  return false unless extname == '.js'

  # CoffeeScript generated by > 1.2 include a comment on the first line
  if lines[0] =~ /^\/\/ Generated by /
    return true
  end

  if lines[0] == '(function() {' &&     # First line is module closure opening
      lines[-2] == '}).call(this);' &&  # Second to last line closes module closure
      lines[-1] == ''                   # Last line is blank

    score = 0

    lines.each do |line|
      if line =~ /var /
        # Underscored temp vars are likely to be Coffee
        score += 1 * line.gsub(/(_fn|_i|_len|_ref|_results)/).count

        # bind and extend functions are very Coffee specific
        score += 3 * line.gsub(/(__bind|__extends|__hasProp|__indexOf|__slice)/).count
      end
    end

    # Require a score of 3. This is fairly arbitrary. Consider
    # tweaking later.
    score >= 3
  else
    false
  end
end

#composer_lock? ⇒ Boolean

Internal: Is the blob a generated php composer lock file?

Returns true or false.



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# File 'lib/linguist/generated.rb', line 237

def composer_lock?
  !!name.match(/composer\.lock/)
end

#data ⇒ Object

Lazy load blob data if block was passed in.

Awful, awful stuff happening here.

Returns String data.



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# File 'lib/linguist/generated.rb', line 32

def data
  @data ||= @_data.respond_to?(:call) ? @_data.call() : @_data
end

#generated? ⇒ Boolean

Internal: Is the blob a generated file?

Generated source code is suppressed in diffs and is ignored by language statistics.

Please add additional test coverage to ‘test/test_blob.rb#test_generated` if you make any changes.

Return true or false



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# File 'lib/linguist/generated.rb', line 53

def generated?
  name == 'Gemfile.lock' ||
    minified_files? ||
    compiled_coffeescript? ||
    xcode_file? ||
    generated_parser? ||
    generated_net_docfile? ||
    generated_net_designer_file? ||
    generated_postscript? ||
    generated_protocol_buffer? ||
    generated_jni_header? ||
    composer_lock? ||
    node_modules? ||
    vcr_cassette? ||
    generated_by_zephir?
end

#generated_by_zephir? ⇒ Boolean

Internal: Is the blob a generated by Zephir

Returns true or false.



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# File 'lib/linguist/generated.rb', line 244

def generated_by_zephir?
  !!name.match(/.\.zep\.(?:c|h|php)$/)
end

#generated_jni_header? ⇒ Boolean

Internal: Is the blob a C/C++ header generated by the Java JNI tool javah?

Returns true of false.



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# File 'lib/linguist/generated.rb', line 219

def generated_jni_header?
  return false unless extname == '.h'
  return false unless lines.count > 2

  return lines[0].include?("/* DO NOT EDIT THIS FILE - it is machine generated */") &&
           lines[1].include?("#include <jni.h>")
end

#generated_net_designer_file? ⇒ Boolean

Internal: Is this a codegen file for a .NET project?

Visual Studio often uses code generation to generate partial classes, and these files can be quite unwieldy. Let’s hide them.

Returns true or false



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# File 'lib/linguist/generated.rb', line 161

def generated_net_designer_file?
  name.downcase =~ /\.designer\.cs$/
end

#generated_net_docfile? ⇒ Boolean

Internal: Is this a generated documentation file for a .NET assembly?

.NET developers often check in the XML Intellisense file along with an assembly - however, these don’t have a special extension, so we have to dig into the contents to determine if it’s a docfile. Luckily, these files are extremely structured, so recognizing them is easy.

Returns true or false



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# File 'lib/linguist/generated.rb', line 144

def generated_net_docfile?
  return false unless extname.downcase == ".xml"
  return false unless lines.count > 3

  # .NET Docfiles always open with <doc> and their first tag is an
  # <assembly> tag
  return lines[1].include?("<doc>") &&
    lines[2].include?("<assembly>") &&
    lines[-2].include?("</doc>")
end

#generated_parser? ⇒ Boolean

Internal: Is the blob of JS a parser generated by PEG.js?

PEG.js-generated parsers are not meant to be consumed by humans.

Return true or false



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# File 'lib/linguist/generated.rb', line 170

def generated_parser?
  return false unless extname == '.js'

  # PEG.js-generated parsers include a comment near the top  of the file
  # that marks them as such.
  if lines[0..4].join('') =~ /^(?:[^\/]|\/[^\*])*\/\*(?:[^\*]|\*[^\/])*Generated by PEG.js/
    return true
  end

  false
end

#generated_postscript? ⇒ Boolean

Internal: Is the blob of PostScript generated?

PostScript files are often generated by other programs. If they tell us so, we can detect them.

Returns true or false.



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# File 'lib/linguist/generated.rb', line 188

def generated_postscript?
  return false unless ['.ps', '.eps'].include? extname

  # We analyze the "%%Creator:" comment, which contains the author/generator
  # of the file. If there is one, it should be in one of the first few lines.
  creator = lines[0..9].find {|line| line =~ /^%%Creator: /}
  return false if creator.nil?

  # Most generators write their version number, while human authors' or companies'
  # names don't contain numbers. So look if the line contains digits. Also
  # look for some special cases without version numbers.
  return creator =~ /[0-9]/ ||
    creator.include?("mpage") ||
    creator.include?("draw") ||
    creator.include?("ImageMagick")
end

#generated_protocol_buffer? ⇒ Boolean

Internal: Is the blob a C++, Java or Python source file generated by the Protocol Buffer compiler?

Returns true of false.



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# File 'lib/linguist/generated.rb', line 209

def generated_protocol_buffer?
  return false unless ['.py', '.java', '.h', '.cc', '.cpp'].include?(extname)
  return false unless lines.count > 1

  return lines[0].include?("Generated by the protocol buffer compiler.  DO NOT EDIT!")
end

#lines ⇒ Object

Public: Get each line of data

Returns an Array of lines



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# File 'lib/linguist/generated.rb', line 39

def lines
  # TODO: data should be required to be a String, no nils
  @lines ||= data ? data.split("\n", -1) : []
end

#minified_files? ⇒ Boolean

Internal: Is the blob minified files?

Consider a file minified if the average line length is greater then 110c.

Currently, only JS and CSS files are detected by this method.

Returns true or false.



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# File 'lib/linguist/generated.rb', line 88

def minified_files?
  return unless ['.js', '.css'].include? extname
  if lines.any?
    (lines.inject(0) { |n, l| n += l.length } / lines.length) > 110
  else
    false
  end
end

#node_modules? ⇒ Boolean

Internal: Is the blob part of node_modules/, which are not meant for humans in pull requests.

Returns true or false.



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# File 'lib/linguist/generated.rb', line 230

def node_modules?
  !!name.match(/node_modules\//)
end

#vcr_cassette? ⇒ Boolean

Is the blob a VCR Cassette file?

Returns true or false



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# File 'lib/linguist/generated.rb', line 251

def vcr_cassette?
  return false unless extname == '.yml'
  return false unless lines.count > 2
  # VCR Cassettes have "recorded_with: VCR" in the second last line.
  return lines[-2].include?("recorded_with: VCR")
end

#xcode_file? ⇒ Boolean

Internal: Is the blob an Xcode file?

Generated if the file extension is an Xcode file extension.

Returns true of false.



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# File 'lib/linguist/generated.rb', line 76

def xcode_file?
  ['.nib', '.xcworkspacedata', '.xcuserstate'].include?(extname)
end