add a simple Lua format base on js

src/beautifiers/lua-beautifier/beautifier.coffee

@@ -0,0 +1,79 @@
+DEFAULT_INDENT = '    '
+
+module.exports = (str, indent) ->
+  indent = indent or DEFAULT_INDENT
+  indent = ' '.repeat indent if Number.isInteger indent
+  $currIndent = 0
+  $nextIndent = 0
+  $prevLength = 0
+  $extIndent = 0
+  $lastIndent = 0
+  $template = 0
+  new_code = str.split(/\r?\n/g).map (line, line_number) ->
+    $template_flag = false
+    if $template
+      res2 = line.match /\](=*)\]/
+      if res2 and $template == res2[1].length + 1
+        $template = 0
+        $template_flag = true
+      else
+        return line
+    res1 = line.match /\[(=*)\[/
+    if res1
+      $template = res1[1].length + 1
+    if !$template_flag
+      line = line.trim()
+      # remote all spaces on both ends
+      string_list = line.match /(['"])[^\1]*?\1/g
+      line = line.replace /\s+/g, ' '
+      # replace all whitespaces inside the string with one space, WARNING: the whitespaces in string will be replace too!
+      line = line.replace /([^\-])\s?(==|>=|<=|[=><\+\-\*\/])\s?([^\-\[])/g, '$1 $2 $3'
+      # add whitespace around the operator
+      line = line.replace /,([^\s])/g, ', $1'
+      line = line.replace /\s,/g, ','
+      # recover the whitespaces in string.
+      line = line.replace /(['"])[^\1]*?\1/g, ->
+        string_list.shift()
+
+      return '' if !line.length
+    raw_line = line
+    line = line.replace /(['"])[^\1]*?\1/, ''
+    # remove all quoted fragments for proper bracket processing
+    line = line.replace /\s*--.+/, ''
+    # remove all comments; this ignores long bracket style comments
+    if /^((local )?function|repeat|while)\b/.test(line) and !/\bend\s*[\),;]*$/.test(line) or /\b(then|do)$/.test(line) and !/^elseif\b/.test(line) or /^if\b/.test(line) and /\bthen\b/.test(line) and !/\bend$/.test(line) or /\bfunction ?(?:\w+ )?\([^\)]*\)$/.test(line) and !/\bend$/.test(line)
+      $nextIndent = $currIndent + 1
+    else if /^until\b/.test(line) or /^end\s*[\),;]*$/.test(line) or /^end\s*\)\s*\.\./.test(line) or /^else(if)?\b/.test(line) and /\bend$/.test(line)
+      $nextIndent = --$currIndent
+    else if /^else\b/.test(line) or /^elseif\b/.test(line)
+      $nextIndent = $currIndent
+      $currIndent = $currIndent - 1
+    $brackets = (line.match(/\(/g) or []).length - ((line.match(/\)/g) or []).length)
+    # capture unbalanced brackets
+    $curly = (line.match(/\{/g) or []).length - ((line.match(/\}/g) or []).length)
+    # capture unbalanced curly brackets
+    # close (curly) brackets if needed
+    $currIndent += $curly if $curly < 0
+    $currIndent += $brackets if $brackets < 0
+    $nextIndent += $brackets + $curly
+
+    if $currIndent - $lastIndent > 1
+      $extIndent += $nextIndent - $lastIndent - 1
+      $nextIndent = $currIndent = 1 + $lastIndent
+    if $currIndent - $lastIndent < -1 and $extIndent > 0
+      $extIndent += $currIndent - $lastIndent + 1
+      $currIndent = -1 + $lastIndent
+    if $nextIndent < $currIndent
+      $nextIndent = $currIndent
+
+    if $currIndent < 0
+      console.warn 'WARNING: negative indentation at line ${line_number}: ${raw_line}'
+    new_line = (if raw_line.length and $currIndent > 0 and !$template_flag then indent.repeat($currIndent) else '') + raw_line
+
+    $useful = $prevLength > 0 or raw_line.length > 0
+    $lastIndent = $currIndent
+    $currIndent = $nextIndent
+    $prevLength = raw_line.length
+    return new_line if $useful
+  console.warn 'WARNING: positive indentation at the end' if $currIndent > 0
+  new_code.join '\n'

src/beautifiers/lua-beautifier/beautifier.pl

@@ -1,57 +0,0 @@
-# Copyright 2011 Paul Kulchenko
-# Credits: http://notebook.kulchenko.com/programming/lua-beautifier-in-55-lines-of-perl
-use strict;
-use warnings;
-
-use constant INDENT => '  ';
-my($currIndent, $nextIndent, $prevLength) = (0, 0, 0);
-
-while (<>) {
-  chomp;
-  s/^\s+|\s+$//g; # remote all spaces on both ends
-  s/\s+/ /g; # replace all whitespaces inside the string with one space
-
-  my $orig = $_;
-
-  s/(['"])[^\1]*?\1//g; # remove all quoted fragments for proper bracket processing
-  s/\s*--.+//; # remove all comments; this ignores long bracket style comments
-
-  # open a level; increase next indentation; don't change current one
-  if (/^((local )?function|repeat|while)\b/ && !/\bend\s*[\),;]*$/
-   || /\b(then|do)$/ && !/^elseif\b/     # only open on 'then' if there is no 'elseif'
-   || /^if\b/ && /\bthen\b/ && !/\bend$/ # only open on 'if' if there is no 'end' at the end
-   || /\bfunction\s*\([^\)]*\)$/) {
-    $nextIndent = $currIndent + 1;
-  }
-  # close the level; change both current and next indentation
-  elsif (/^until\b/ 
-      || /^end\s*[\),;]*$/
-      || /^end\s*\)\s*\.\./ # this is a special case of 'end).."some string"'
-      || /^else(if)?\b/ && /\bend$/) {
-    $nextIndent = $currIndent = $currIndent - 1;
-  }
-  # keep the level; decrease the current indentation; keep the next one
-  elsif (/^else\b/ 
-      || /^elseif\b/) {
-    ($nextIndent, $currIndent) = ($currIndent, $currIndent-1);
-  }
-
-  my $brackets = y/(// - y/)//; # capture unbalanced brackets
-  my $curly = y/{// - y/}//; # capture unbalanced curly brackets
-
-  # close (curly) brackets if needed
-  $currIndent += $curly if $curly < 0 && /^\}/; 
-  $currIndent += $brackets if $brackets < 0 && /^\)/; 
-
-  warn "WARNING: negative indentation at line $.: $orig\n" if $currIndent < 0;
-
-  print((length($orig) ? (INDENT x $currIndent) : ''), $orig, "\n")
-    if $prevLength > 0 || length($orig) > 0; # this is to collapse empty lines
-
-  $nextIndent += $brackets + $curly;
-
-  $currIndent = $nextIndent;
-  $prevLength = length($orig);
-}
-
-warn "WARNING: positive indentation at the end\n" if $nextIndent > 0;

src/beautifiers/lua-beautifier/index.coffee

@@ -4,6 +4,7 @@ path = require("path")
 
 "use strict"
 Beautifier = require('../beautifier')
+format = require './beautifier'
 
 module.exports = class Lua extends Beautifier
   name: "Lua beautifier"
@@ -14,9 +15,8 @@ module.exports = class Lua extends Beautifier
   }
 
   beautify: (text, language, options) ->
-    lua_beautifier = path.resolve(__dirname, "beautifier.pl")
+    new @Promise (resolve, reject) ->
-    @run("perl", [
+      try
-      lua_beautifier,
+        resolve format text, options.indent_char.repeat options.indent_size
-      '<',
+      catch error
-      @tempFile("input", text)
+        reject error
-      ])