fis-commonjs/index.js

//支持文件监控

let isWatch = process.title.split(' ')[2].indexOf('w') != -1;

let myWatch = function () {
	let fs = require('fs');
	let table = {};

	function toWatch(f1) {
		if (!isWatch) {
			return false
		}
		//最多2s触发一次watch改动
		let isPlay = false

		fs.watch(f1, function () {
			if (isPlay) {
				return false
			}
			isPlay = true;

			setTimeout(function () {
				isPlay = false
			}, 2000);

			var f2List = table[f1]
			f2List.forEach(function (f2) {
				fs.utimes(f2, new Date, new Date);
				console.log('touch ' + f2)
			})
		})
	}

	function watch(f1, f2) {
		if (f1 in table) {
			if (table[f1].indexOf(f2) == -1) {
				table[f1].push(f2)
			}
		}
		else {
			table[f1] = [f2];
			toWatch(f1)
		}
	}

	return {watch: watch}
}();

module.exports = function (content, file, options) {
	let fs = require('fs');
	let path = require('path');
	let crypto = require('crypto');

	let modTable = [];
	let modLinkTable = {};
	let scanReg = /require\(['|"](.*?)['|"]\)/g;

	function getMd5(str) {
		let md5 = crypto.createHash('md5');
		md5.update(str);

		var md58 = md5.digest('hex').slice(-8);

		//有一定几率出现md58是纯数字，但是firefox不支持window['123']的情况，所以加前缀
		if (/^\d+$/.test(md58)) {
			md58 = 'ml-' + md58
		}

		return md58
	}

	function getFullPath(p) {
		let fullPath = path.join(__dirname, p);
		return fullPath
	}

	function getModFile(p) {
		let fullPath = getFullPath(p)
		let content = fs.readFileSync(fullPath) + '';

		var windowFunc = 'window["' + getMd5(p.replace(/\\/g, '/')) + '"]';

		//如果是tpl文件
		if (p.slice(-4) == '.tpl') {
			return '//#----------------mod start----------------\n' +
					windowFunc + '= \'' + content.replace(/\r?\n\s*/g, '') + '\'\n' +
					'//#----------------mod end----------------\n\n'
		}

		//如果是js文件
		if (p in modLinkTable) {
			for (var relpath in modLinkTable[p]) {
				var abspath = modLinkTable[p][relpath]
				content = content.replace(RegExp(relpath, 'g'), getMd5(abspath.replace(/\\/g, '/')))
			}
		}

		return '//#----------------mod start----------------\n' +
				'void function (module){\n\t' +
				windowFunc + '={};\n' +
				content.replace(/module\.exports/g, windowFunc).replace(/(^|\n)/g, '\n\t') +
				'\n}({exports:{}})\n' +
				'//#----------------mod end----------------\n\n'
	}

	function fillModLinkTable(subpath, requireNameA, requireNameB) {
		if (!(subpath in modLinkTable)) {
			modLinkTable[subpath] = {}
		}

		modLinkTable[subpath][requireNameA] = requireNameB
	}

	function scanMod(subpath) {
		let modTable2 = []
		let modContent = fs.readFileSync(getFullPath(subpath)) + '';

		let execValue
		while ((execValue = scanReg.exec(modContent)) != null) {
			let requireName = execValue[1]
			let modPath

			//如果rquire的是绝对路径
			if (requireName[0] == '/') {
				modPath = path.join(requireName)
			}
			else {
				modPath = path.join(path.dirname(subpath), requireName)
			}
			fillModLinkTable(subpath, requireName, modPath)
			modTable2.unshift(modPath)
		}

		modTable2.forEach(function (mod) {
			let idx = modTable.indexOf(mod)
			if (idx != -1) {
				modTable.splice(idx, 1)
			}
			modTable.unshift(mod)
			scanMod(mod)
		})

	}

	//1、是js文件。2、文件名不能下划线打头(下划线的不被release出去)。3、min.js结尾的文件都直接被<script src>
	if ((file.filename[0] != '_') && (file.filename.slice(-4) != '.min')) {

		modTable = [];
		modLinkTable = {};
		scanMod(file.subpath);

		//把mods声明放到最前
		let modsContent = '';

		modTable.forEach(function (mod) {
			modsContent += getModFile(mod);
			myWatch.watch(getFullPath(mod), file.fullname);
		});

		content = modsContent + getModFile(file.subpath);

		//替换所有require
		content = content.replace(scanReg, function (match, value) {
			return 'window["' + value + '"]'
		})

	}
	return content
}