Blame view

node_modules/ajv/scripts/compile-dots.js 2.37 KB
f7563de62   Palak Handa   first commit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
  //compile doT templates to js functions
  'use strict';
  
  var glob = require('glob')
    , fs = require('fs')
    , path = require('path')
    , doT = require('dot')
    , beautify = require('js-beautify').js_beautify;
  
  var defsRootPath = process.argv[2] || path.join(__dirname, '../lib');
  
  var defs = {};
  var defFiles = glob.sync('./dot/**/*.def', { cwd: defsRootPath });
  defFiles.forEach(function (f) {
    var name = path.basename(f, '.def');
    defs[name] = fs.readFileSync(path.join(defsRootPath, f));
  });
  
  var filesRootPath = process.argv[3] || path.join(__dirname, '../lib');
  var files = glob.sync('./dot/**/*.jst', { cwd: filesRootPath });
  
  var dotjsPath = path.join(filesRootPath, './dotjs');
  try { fs.mkdirSync(dotjsPath); } catch(e) {}
  
  console.log('
  
  Compiling:');
  
  var FUNCTION_NAME = /function\s+anonymous\s*\(it[^)]*\)\s*{/;
  var OUT_EMPTY_STRING = /out\s*\+=\s*'\s*';/g;
  var ISTANBUL = /\'(istanbul[^']+)\';/g;
  var ERROR_KEYWORD = /\$errorKeyword/g;
  var ERROR_KEYWORD_OR = /\$errorKeyword\s+\|\|/g;
  var VARS = [
    '$errs', '$valid', '$lvl', '$data', '$dataLvl',
    '$errorKeyword', '$closingBraces', '$schemaPath',
    '$validate'
  ];
  
  files.forEach(function (f) {
    var keyword = path.basename(f, '.jst');
    var targetPath = path.join(dotjsPath, keyword + '.js');
    var template = fs.readFileSync(path.join(filesRootPath, f));
    var code = doT.compile(template, defs);
    code = code.toString()
               .replace(OUT_EMPTY_STRING, '')
               .replace(FUNCTION_NAME, 'function generate_' + keyword + '(it, $keyword) {')
               .replace(ISTANBUL, '/* $1 */');
    removeAlwaysFalsyInOr();
    VARS.forEach(removeUnusedVar);
    code = "'use strict';
  module.exports = " + code;
    code = beautify(code, { indent_size: 2 }) + '
  ';
    fs.writeFileSync(targetPath, code);
    console.log('compiled', keyword);
  
    function removeUnusedVar(v) {
      v = v.replace(/\$/g, '\\$$');
      var regexp = new RegExp(v + '[^A-Za-z0-9_$]', 'g');
      var count = occurrences(regexp);
      if (count == 1) {
        regexp = new RegExp('var\\s+' + v + '\\s*=[^;]+;|var\\s+' + v + ';');
        code = code.replace(regexp, '');
      }
    }
  
    function removeAlwaysFalsyInOr() {
      var countUsed = occurrences(ERROR_KEYWORD);
      var countOr = occurrences(ERROR_KEYWORD_OR);
      if (countUsed == countOr + 1) code = code.replace(ERROR_KEYWORD_OR, '');
    }
  
    function occurrences(regexp) {
      return (code.match(regexp) || []).length;
    }
  });