added support for autodetecting file extensions using the github-ling…

…uist gem.

copyright-header.gemspec

@@ -19,4 +19,5 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.extra_rdoc_files = ['README.md', 'LICENSE', 'AUTHORS', 'contrib/syntax.yml' ]
   s.require_paths = ["lib"]
+  s.add_dependency('github-linguist', '~> 2.6.7')
 end

lib/copyright_header/command_line.rb

@@ -72,14 +72,19 @@ def initialize(options = {})
             @options[:word_wrap] = len.to_i
           end
 
-          opts.on( '-a', '--add-path PATH', 'Recursively insert header in all files found in path (allows multiple pathes separated by platform path-separator)' ) do |path|
+          opts.on( '-a', '--add-path PATH', 'Recursively insert header in all files found in path (allows multiple paths separated by platform path-separator "' + File::PATH_SEPARATOR + '")' ) do |path|
             @options[:add_path] = path
           end
 
-          opts.on( '-r', '--remove-path PATH', 'Recursively remove header in all files found in path (allows multiple pathes separated by platform path-separator)' ) do |path|
+          opts.on( '-r', '--remove-path PATH', 'Recursively remove header in all files found in path (allows multiple paths separated by platform path-separator "' + File::PATH_SEPARATOR + '")' ) do |path|
             @options[:remove_path] = path
           end
 
+          @options[:guess_extension] = false
+          opts.on( '-g', '--guess-extension', 'Use the GitHub Linguist gem to guess the extension of the source code when no extension can be determined (experimental).' ) do 
+            @options[:guess_extension] = true
+          end
+
           @options[:syntax] ||= @options[:base_path] + '/contrib/syntax.yml'
           opts.on( '-c', '--syntax FILE', 'Syntax configuration file' ) do |path|
             @options[:syntax] = path

lib/copyright_header/parser.rb

@@ -21,6 +21,7 @@
 require 'yaml'
 require 'erb'
 require 'ostruct'
+require 'linguist'
 
 module CopyrightHeader
   class FileNotFoundException < Exception; end
@@ -131,7 +132,10 @@ def has_copyright?(lines = 10)
   end
 
   class Syntax
-    def initialize(config)
+    attr_accessor :guess_extension
+
+    def initialize(config, guess_extension = false)
+      @guess_extension = guess_extension
       @config = {}
       syntax = YAML.load_file(config)
       syntax.each_value do |format|
@@ -146,7 +150,11 @@ def initialize(config)
     end
 
     def ext(file)
-      File.extname(file)
+      extension = File.extname(file)
+      if @guess_extension && (extension.nil? || extension.empty?)
+        extension = Linguist::FileBlob.new(file).language.primary_extension 
+      end
+      return extension
     end
 
     def supported?(file)
@@ -171,7 +179,7 @@ def initialize(options = {})
                              :copyright_years => @options[:copyright_years],
                              :copyright_holders => @options[:copyright_holders],
                              :word_wrap => @options[:word_wrap])
-      @syntax = Syntax.new(@options[:syntax])
+      @syntax = Syntax.new(@options[:syntax], @options[:guess_extension])
     end
 
     def execute