Use prettier_print for formatting

Author: kddnewton

Gemfile.lock

@@ -3,6 +3,7 @@ PATH
   specs:
     syntax_tree-haml (1.1.0)
       haml (>= 5.2)
+      prettier_print
       syntax_tree (>= 2.0.1)
 
 GEM
@@ -13,6 +14,7 @@ GEM
       temple (>= 0.8.0)
       tilt
     minitest (5.15.0)
+    prettier_print (0.1.0)
     rake (13.0.6)
     simplecov (0.21.2)
       docile (~> 1.1)

lib/syntax_tree/haml.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "haml"
+require "prettier_print"
 require "syntax_tree"
 
 require "syntax_tree/haml/comment"
@@ -47,12 +48,8 @@ def self.parse(source)
       ::Haml::Parser.new({}).call(source)
     end
 
-    def self.format(source)
-      formatter = PP.new([])
-      parse(source).format(formatter)
-
-      formatter.flush
-      formatter.output.join
+    def self.format(source, maxwidth = 80)
+      PrettierPrint.format(+"", maxwidth) { |q| parse(source).format(q) }
     end
 
     def self.read(filepath)

syntax_tree-haml.gemspec

@@ -25,6 +25,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = %w[lib]
 
   spec.add_dependency "haml", ">= 5.2"
+  spec.add_dependency "prettier_print"
   spec.add_dependency "syntax_tree", ">= 2.0.1"
 
   spec.add_development_dependency "bundler"