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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;
}
});
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