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siteBuild.js
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siteBuild.js
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/* siteBuild.js 0.2
* 全站构建工具, 使用前请确保已经安装 uglify-js 和 less 编译器
* 用法: siteBuild [网站目录] [-f]
* 网站目录需要包含 framework/sea-config.js 或 framework/require-config.js
* siteBuild 会自动从中读取 srcRoot, productRoot, siteVersion 等配置
* 每次构建成功后(即使没有更新任何模块), 都会自动将配置文件中的 debug 标记设置为 false
* siteVersion 中的 release number 会在有模块更新, 并且构建成功后自动 +1
*
* 如果当前目录即为网站目录, 则可以忽略网站目录参数
*
* 如果带有 -f 参数, 则会强制重新构建所有模块, 但仍会根据 hash 值是否发生变化来决定是否更新版本号
*/
'use strict';
var fs = require('fs');
var path = require('path');
var crypto = require('crypto');
var UglifyJS = require('uglify-js');
var less = require('less');
//匹配字符串替换的正则表达式，寻找js中的这种代码 'some string'.replace(/some regex/,'with some text')
//并直接将结果替换掉原来的代码, 以提高发布后的代码执行效率.
//TODO: 正则的实现并不安全，需改用AST
var rplReg = /(?:'(?:(?:[^\n\r']|\\')*?[^\\])??(?:\\\\)*'|"(?:(?:[^\n\r"]|\\")*?[^\\])??(?:\\\\)*")\.replace\(\/((?:\\\\)+|(?:[^\\\/]|[^\/][^\n\r]*?[^\\])(?:\\\\)*)\/(img|igm|mgi|mig|gmi|gim|im|ig|mg|mi|gm|gi|i|m|g),(?:'(?:(?:[^\n\r']|\\')*?[^\\])??(?:\\\\)*'|"(?:(?:[^\n\r"]|\\")*?[^\\])??(?:\\\\)*")\)/g;
var dir, force, n = 2;
if (process.argv.length > 2) {
while ((!dir || !force) && n < process.argv.length) {
if (process.argv[n].toLowerCase() === '-f') {
force = true;
} else {
dir = process.argv[n];
}
n++;
}
}
if (!dir) {
dir = process.cwd();
}
run(dir, force);
function run(dir, force) {
var cfgName = {
'amd': 'framework/require-config.js',
'cmd': 'framework/sea-config.js'
};
var scfg, sscfg, cfgType;
var modsdir, upModCount = 0;
var jsonfile = 'package.json';
var vers = {};
for (cfgType in cfgName) {
scfg = path.join(dir, cfgName[cfgType]);
if (fs.existsSync(scfg)) {
sscfg = fs.readFileSync(scfg, {
encoding: 'utf8'
//读取配置文件中的变量, 支持常规的压缩
}).match(/^([^=]+=\s*)(\{[^\}]*\})([^=]+=\s*)("[^"]*"|'[^']*')([^=]+=\s*)("[^"]*"|'[^']*')([^=]+=\s*)("[\d\.]*"|'[\d\.]*')([^=]+=\s*)(0|1|!0|!1|true|false)((?:.|\n)+)$/);
if (sscfg) {
sscfg.shift();
delete sscfg.input;
delete sscfg.index;
modsdir = path.join(dir, eval(sscfg[3]));
if (fs.existsSync(modsdir)) {
var fms = fs.readdirSync(modsdir);
var i = 0,
j = 0;
var tfms, mods, tmod, fnn, files, jsonpath, json, hash, ln, tmpdist, distfile, orgfile;
loop1();
} else {
console.log('srcRoot not found');
}
} else {
console.log('bad config format');
}
break;
}
}
function loop1() {
if (j === 0) {
tfms = path.join(modsdir, fms[i]);
if (fs.statSync(tfms).isDirectory()) {
mods = fs.readdirSync(tfms);
loop2();
} else {
p2();
}
} else {
loop2();
}
}
function loop2() {
tmod = path.join(tfms, mods[j]);
if (fs.statSync(tmod).isDirectory()) {
tmpdist = path.join(tmod, 'dist');
if (fs.existsSync(tmpdist)) {
rdsync(tmpdist);
}
files = getfiles(tmod);
if (files.length > 0) {
fnn = fms[i] + '/' + mods[j];
jsonpath = path.join(tmod, jsonfile);
if (fs.existsSync(jsonpath) && !fs.statSync(jsonpath).isDirectory()) {
json = JSON.parse(fs.readFileSync(jsonpath, {
encoding: 'utf8'
}));
} else {
json = {
version: '0.0.1'
};
}
hash = dirhash(tmod, files);
if (hash !== json.hash || force) {
if (hash !== json.hash) {
upModCount += 1;
//do not update the version number for the first time build
if ('hash' in json) {
json.version = updatever(json.version);
}
}
ln = 0;
checkFiles();
} else {
vers[fnn] = json.version;
console.log(fnn + ' is not changed since last build');
p1();
}
} else {
p1();
}
} else {
p1();
}
}
function checkFiles() {
var f, d;
if (ln < files.length) {
f = files[ln].match(/\.(?:(less)|(js))$/);
distfile = path.join(tmpdist, files[ln]);
orgfile = path.join(tmod, files[ln]);
d = path.dirname(distfile);
if (!fs.existsSync(d)) {
mdsync(d);
}
if (f) {
if (f[2]) {
buildJs();
ln++;
checkFiles();
} else {
buildLess();
}
} else {
fs.writeFileSync(distfile, fs.readFileSync(orgfile));
ln++;
checkFiles();
}
} else {
deploy();
}
}
function buildJs() {
var ast, deps;
ast = UglifyJS.parse(fs.readFileSync(orgfile, {
encoding: 'utf8'
}));
if (cfgType === 'cmd') {
deps = [];
ast.walk(new UglifyJS.TreeWalker(function(node, descend) {
if (node instanceof UglifyJS.AST_Call && node.expression.name === 'require' && node.args.length) {
deps.push(node.args[0].clone());
}
}));
}
ast.figure_out_scope();
ast = ast.transform(new UglifyJS.TreeTransformer(function(node, descend) {
if (node instanceof UglifyJS.AST_Call && node.expression.name === 'define') {
if (deps) {
node.args.unshift(new UglifyJS.AST_Array({
elements: deps
}));
}
node.args.unshift(new UglifyJS.AST_String({
value: fnn + '/' + files[ln].replace(/\.js$/, '')
}));
return node;
}
}));
ast.figure_out_scope();
ast = ast.transform(UglifyJS.Compressor({
sequences: true, // join consecutive statemets with the “comma operator”
properties: true, // optimize property access: a["foo"] → a.foo
dead_code: true, // discard unreachable code
drop_debugger: true, // discard “debugger” statements
unsafe: true, // some unsafe optimizations (see below)
conditionals: true, // optimize if-s and conditional expressions
comparisons: true, // optimize comparisons
evaluate: true, // evaluate constant expressions
booleans: true, // optimize boolean expressions
loops: true, // optimize loops
unused: true, // drop unused variables/functions
hoist_funs: true, // hoist function declarations
hoist_vars: true, // hoist variable declarations
if_return: true, // optimize if-s followed by return/continue
join_vars: true, // join var declarations
cascade: true, // try to cascade `right` into `left` in sequences
side_effects: true, // drop side-effect-free statements
warnings: false, // warn about potentially dangerous optimizations/code
}));
ast.figure_out_scope();
ast.compute_char_frequency();
ast.mangle_names();
fs.writeFileSync(distfile, ast.print_to_string().replace(rplReg, evalReplace));
}
function buildLess() {
less.render(fs.readFileSync(orgfile, {
encoding: 'utf8'
}), {
paths: [path.dirname(orgfile)],
compress: true
}).then(function(output) {
fs.writeFileSync(distfile.replace(/less$/, 'css'), output.css);
ln++;
checkFiles();
}, function(err) {
console.log('error occurs while compiling ' + orgfile + '\n' + err);
});
}
function deploy() {
var pth = path.join(dir, eval(sscfg[5]), fnn);
var pth1, pth2;
if (fs.existsSync(pth)) {
pth1 = fs.readdirSync(pth);
for (var k = 0; k < pth1.length; k++) {
pth2 = path.join(pth, pth1[k]);
if (fs.lstatSync(pth2).isDirectory()) {
rdsync(pth2);
} else {
fs.unlinkSync(pth2);
}
}
} else {
mdsync(pth);
}
pth = path.join(pth, json.version);
if (fs.existsSync(tmpdist)) {
fs.renameSync(tmpdist, pth);
}
vers[fnn] = json.version;
if (hash !== json.hash) {
json.hash = hash;
fs.writeFileSync(jsonpath, JSON.stringify(json));
}
console.log('successfuly built ' + fnn);
p1();
}
function p1() {
j += 1;
if (j === mods.length) {
i += 1;
j = 0;
}
if (i < fms.length) {
setTimeout(loop1, 0);
} else {
updateCfg();
}
}
function p2() {
i += 1;
if (i < fms.length) {
setTimeout(loop1, 0);
} else {
updateCfg();
}
}
function updateCfg() {
sscfg[1] = JSON.stringify(vers);
if (upModCount > 0) {
sscfg[7] = JSON.stringify(updatever(eval(sscfg[7])));
}
sscfg[9] = 'false';
fs.writeFileSync(scfg, sscfg.join(''));
console.log('updated ' + upModCount + ' modules');
}
}
function getfiles(dir) {
var f = [];
var fd = fs.readdirSync(dir);
for (var i = 0; i < fd.length; i++) {
var nfd = path.join(dir, fd[i]);
if (fs.statSync(nfd).isDirectory()) {
var nfda = getfiles(nfd);
for (var j = 0; j < nfda.length; j++) {
f.push(path.join(fd[i], nfda[j]));
}
} else {
if (!fd[i].match(/^\.|\.tpl$|^package\.json$/)) {
f.push(fd[i]);
}
}
}
return f;
}
function updatever(ver) {
var vs = ver.match(/(\d+\.\d+.)(\d+)/);
if (vs) {
return vs[1] + (parseInt(vs[2]) + 1);
} else {
return '0.0.1';
}
}
function dirhash(dir, files) {
var data;
var hash = crypto.createHash('sha1');
for (var i = 0; i < files.length; i++) {
data = fs.readFileSync(path.join(dir, files[i]));
hash.update(data);
}
return hash.digest('base64');
}
function mdsync(p, mode) {
var pp = path.dirname(path.resolve(p));
if (!fs.existsSync(pp)) {
mdsync(pp, mode);
}
fs.mkdirSync(p, mode);
}
function rdsync(p) {
var f = fs.readdirSync(p);
for (var i = 0; i < f.length; i++) {
var pth = path.join(p, f[i]);
if (fs.lstatSync(pth).isDirectory()) {
rdsync(pth);
} else {
fs.unlinkSync(pth);
}
}
fs.rmdirSync(p);
}
function evalReplace($0) {
var result = eval($0);
var s = result.match(/'/g),
d;
if (!s) {
s = '\'';
} else {
d = result.match(/"/g);
if (!d) {
s = '"';
} else {
s = d.length > s.length ? '\'' : '"';
}
}
return s + result.replace(RegExp('[\\n\\r' + s + '\\\\]', 'g'), function(a) {
if (a === '\n') {
return '\\n';
} else if (a === '\r') {
return '\\r';
} else if (a === '\\') {
return '\\\\';
} else {
return '\\' + a;
}
}) + s;
}