add Rscons.glob - close #50

lib/rscons.rb

@@ -165,6 +165,35 @@ module Rscons
       @command_executer = val
     end
 
+    # Return a list of paths matching the specified pattern(s).
+    #
+    # @since 1.16.0
+    #
+    # A pattern can contain a "/**" component to recurse through directories.
+    # If the pattern ends with "/**" then only the recursive list of
+    # directories will be returned.
+    #
+    # Examples:
+    # - "src/**": return all directories under "src", recursively (including
+    #   "src" itself).
+    # - "src/**/*": return all files and directories recursively under the src
+    #   directory.
+    # - "src/**/*.c": return all .c files recursively under the src directory.
+    # - "dir/*/": return all directories in dir, but no files.
+    #
+    # @return [Array<String>] Paths matching the specified pattern(s).
+    def glob(*patterns)
+      require "pathname"
+      patterns.reduce([]) do |result, pattern|
+        if pattern.end_with?("/**")
+          pattern += "/"
+        end
+        result += Dir.glob(pattern).map do |path|
+          Pathname.new(path.gsub("\\", "/")).cleanpath.to_s
+        end
+      end.sort
+    end
+
     private
 
     # Determine the number of threads to use by default.