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56 lines
2.0 KiB
JavaScript
56 lines
2.0 KiB
JavaScript
/**
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* Idea taken from https://github.com/fpirsch/twin-bcrypt/blob/master/Gearfile.js
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*/
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'use strict';
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var fs = require('fs');
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module.exports = function(grunt) {
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grunt.registerTask('uglyasm', function() {
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var code = fs.readFileSync('dist/quagga.js', 'utf-8'),
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minifiedCode = fs.readFileSync('dist/quagga.min.js', 'utf-8'),
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commentEnd = '/* @preserve ASM END */',
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asmStartIdx = code.indexOf('/* @preserve ASM BEGIN */'),
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asmEndIdx = code.indexOf(commentEnd),
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asmCode = code.substring(asmStartIdx, asmEndIdx + commentEnd.length),
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asmFunctionRegex = /function (\w+)\(\w+,\s*\w+,\s*\w+\)\s*\{\s*"use asm";/,
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asmModule,
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asmModuleName,
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asmCodeMinified,
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asmMinifiedModuleName;
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asmCodeMinified = asmCode
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.replace(/\s*\/\/.*/g, '') // remove single-line comments
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.replace(/\s*\/\*[^]*?\*\//g, '') // remove multi-line comments
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.replace(/\n\s*/g, '') // remove indentation
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.replace(/ ([+=^|&]|>+|<+) /g, '$1') // remove spaces around operators
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.replace(/[\r\n/]/g, ''); // remove new lines
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grunt.log.debug(asmCodeMinified);
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asmModule = asmCode.match(asmFunctionRegex);
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if (!asmModule) {
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grunt.log.error("No ASM module found");
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return;
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}
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asmModuleName = asmModule[1];
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grunt.log.debug(asmModuleName);
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asmModule = minifiedCode.match(asmFunctionRegex);
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if (!asmModule) {
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grunt.log.error("No ASM module found in minified file");
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return;
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}
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asmMinifiedModuleName = asmModule[1];
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grunt.log.debug(asmMinifiedModuleName);
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asmCodeMinified = asmCodeMinified.replace(asmModuleName, asmMinifiedModuleName);
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minifiedCode = minifiedCode.replace(/\/\* @preserve ASM BEGIN \*\/[^]*?\/\* @preserve ASM END \*\//, asmCodeMinified);
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fs.writeFileSync('dist/quagga.min.js', minifiedCode);
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grunt.log.ok('dist/quagga.min.js written');
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});
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}; |