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qwen/nodejs/node_modules/ajv/scripts/compile-dots.js

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+//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('\n\nCompiling:');
+
+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, $ruleType) {')
+             .replace(ISTANBUL, '/* $1 */');
+  removeAlwaysFalsyInOr();
+  VARS.forEach(removeUnusedVar);
+  code = "'use strict';\nmodule.exports = " + code;
+  code = beautify(code, { indent_size: 2 }) + '\n';
+  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;
+  }
+});