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index.js
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index.js
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"use strict";
/**
* stream based dependencies fetching task
* version: 1.0.13
* author: tommyZZM
*/
// const fs = require("fs");
const path = require("path");
const os = require("os");
const R = require("ramda");
const shelljs = require("shelljs");
const request = require("request");
const requestProgress = require("request-progress");
const progress = require("progress");
const tars = require("tar-stream");
const gunzip = require("gunzip-maybe");
// const unzip = require("unzip");
const yauzl = require("yauzl");
const log = require("fancy-log");
const rimraf = require("rimraf");
const source = require('vinyl-source-stream');
const vfs = require("vinyl-fs");
const through = require("through2");
const streamToPromise = require("stream-to-promise");
const touch = require("touch");
const mkdirp = require("mkdirp");
// ...
const fs = require("mz/fs")
//const env_const = require("../lib/env_const");
// ...
//const os_platform = os.platform();
const cwd = process.cwd();
const argv = require("yargs")
.alias("d", "deps")
.array("deps")
.default("wget", false)
.default("force", false)
.argv;
const shouldForceDownload = argv["force"];
const shouldUseWget = argv["use-wget"];
const bundleTypeCheckers = [
[u => /.+\.tar\.gz$/i.test(u), bundleExtractorTarGz],
[u => /.+\.zip$/i.test(u), bundleExtractorZip]
]
const noopChecker = [void 0, (read, distPath, sourceUrl, options) => {
const name = options.name;
return read.pipe(source(path.basename(name || sourceUrl))).pipe(vfs.dest(path.dirname(distPath)))
}]
const depsToDownloadNames = argv.deps;
// console.log("argv", argv);
const availableTemplateFunctions = {
//...env_const
}
const defaultResolveUrlTemplate = url => url
.replace(/\{\{([\w_-]+)\}\}/g, function(matched, functionName) {
if (typeof availableTemplateFunctions[functionName] === "function") {
return availableTemplateFunctions[functionName]();
}
return matched;
});
module.exports = function(deps, depFolder, depCacheFolder = void 0) {
return _ => deps.reduce((lastTask, dep) => {
if (!Array.isArray(dep)) return lastTask;
const [name, sourceUrl, options = {}] = dep;
const shouldDownload = (!depsToDownloadNames || depsToDownloadNames.length === 0) ?
true :
R.contains(name, depsToDownloadNames);
// console.log(name, shouldDownload);
if (!shouldDownload) return lastTask;
if (typeof sourceUrl !== "string" && Array.isArray(sourceUrl)) {
let [ sourceUrlTemplate, subDepNames ] = sourceUrl;
sourceUrlTemplate = defaultResolveUrlTemplate(sourceUrlTemplate)
let checker = R.find(([regexpTest]) => regexpTest(sourceUrlTemplate), bundleTypeCheckers);
if (!checker) checker = noopChecker;
return lastTask.then(_ => {
return subDepNames.map(subDepName => {
return [
[name, subDepName],
sourceUrlTemplate
.replace(/\{\{\.\.\.\}\}/gi, subDepName)
];
})
.reduce((lastTask, dep) => {
return lastTask.then(_ => processFetchDep(dep, checker, depFolder, depCacheFolder))
}, Promise.resolve())
});
}
const sourceUrlResolved = defaultResolveUrlTemplate(sourceUrl);
let checker = R.find(([regexpTest]) => regexpTest(sourceUrlResolved), bundleTypeCheckers);
// if no need to extract using a noop stream
if (!checker) checker = noopChecker;
return lastTask.then(_ => processFetchDep(
[name, sourceUrlResolved, options], checker, depFolder, depCacheFolder)
);
}, Promise.resolve());
}
function processFetchDep(dep, checker, depFolder, depCacheFolder) {
let [name, sourceUrl, options = {}] = dep;
// if (typeof sourceUrl !== "string") return tasks;
let [_, x] = checker;
let namePath = name;
if (Array.isArray(name)) {
namePath = name.join("/");
name = name.join("@");
} else {
options.name = name;
}
const downloadFileName = name + "_" + path.basename(sourceUrl);
const depFolderFullPath = path.join(cwd, depFolder, namePath);
const depCacheFolderFullPath = depCacheFolder ? path.join(cwd, depCacheFolder) : null;
const depCachePath = depCacheFolder ? path.join(cwd, depCacheFolder, downloadFileName): null;
log(`--- ${name} ---`);
return fs.exists(depFolderFullPath)
.then(isExits => isExits ? rimraf.sync(depFolderFullPath) : Promise.resolve())
.then(_ => depCachePath ? fs.exists(depCachePath) : false)
.then(cacheExits => {
if (cacheExits && !shouldForceDownload) {
return [cacheExits, fs.createReadStream(depCachePath)]
}
return [
cacheExits,
shouldUseWget ?
downloadByWget(sourceUrl, depCachePath) :
downloadByRequest(sourceUrl)
]
})
.then(([cacheExits, read]) => {
if (read instanceof Promise) {
return read.then(readStream => [cacheExits, readStream])
}
return [cacheExits, read];
})
.then(([cacheExits, read]) => {
log((cacheExits && !shouldForceDownload) ?
`cache found ${downloadFileName} ...` :
`fetching ${downloadFileName} from '${sourceUrl}' ...`
);
const extract = x(read, depFolderFullPath, sourceUrl, options);
if (!cacheExits) {
depCacheFolder && log("will save cache ...");
return Promise.all([
streamToPromise(extract),
depCacheFolderFullPath ? streamToPromise(
read.pipe(source(downloadFileName))
.pipe(vfs.dest(depCacheFolderFullPath))
) : Promise.resolve()
])
}
return streamToPromise(extract);
})
.then(_ => {
log("extract complete ...");
})
}
/**
* 用命令行wget工具下载
* @param {*} url
* @param {*} cachePath
*/
function downloadByWget(url, cachePath) {
// When the output is not a TTY, the progress bar always falls back to “dot”, even if ‘--progress=bar’ was passed to Wget during invokation.
// This behaviour can be overridden and the “bar” output forced by using the “force” parameter as ‘--progress=bar:force’.
// https://www.gnu.org/software/wget/manual/html_node/Download-Options.html
const exec_wget = `wget -q --progress=bar:force --show-progress ${url} -O ${path.basename(cachePath)}`;
console.log(exec_wget);
shelljs.cd(path.dirname(cachePath));
// shelljs.exec(`wget -V`);
const child = shelljs.exec(
exec_wget,
{silent: false, async: true},
);
return new Promise(resolve => {
child.on("exit", _ => {
resolve(fs.createReadStream(cachePath))
})
});
}
/**
* 用request(nodejs http模块)下载
* @param {*} url
*/
function downloadByRequest(url) {
let total = new Buffer("");
let bar = requestProgressBar(url);
return requestProgress(request(url, {
followAllRedirects: true,
followOriginalHttpMethod: true,
forever: true,
headers: {
"User-Agent": "Wget/1.12 (cygwin)",
"Accept": "*/*",
"Connection": "Keep-Alive"
}
}).on('response', function (response) {
console.log("response,code:", response.statusCode);
console.log("response,headers", response.headers);
}))
.on("progress", bar.progress)
.on("end", bar.complete)
.pipe(through((buf, _, next) => {
total = Buffer.concat([total, buf]);
next();
}, function (flush) {
this.push(total);
flush();
}))
}
/**
* 解压.tar.gz
*/
function bundleExtractorTarGz(read, folderExtractTo) {
let parsing = tars.extract()
let beforeFinish = [];
parsing.on("entry", (header, stream, next) => {
let fileName = header.name;
let mode = header.mode;
let type = header.type;
stream.on('end', function () {
next() // ready for next entry
});
let fileNamePaths = fileName.split("/");
fileNamePaths[0] = folderExtractTo;
let fileNameWritePath = fileNamePaths.join("/");
let fileDir = path.dirname(fileNameWritePath);
if (type === 'directory') {
mkdirp.sync(fileNameWritePath, { mode })
} else if (type === 'symlink') {
beforeFinish.push(
_ => fs.symlinkSync(
header.linkname,
fileNameWritePath
)
);
} else if (type === 'file') {
if (header.size === 0) {
touch.sync(fileNameWritePath);
} else {
stream
.pipe(source(path.basename(fileNameWritePath)))
.pipe(vfs.dest(path.dirname(fileNameWritePath), {
mode
}))
.on("error", _ => void 0);
}
} else {
log("unknow chunk type:", type, fileNameWritePath);
}
stream.resume(); // just auto drain the stream
}).on("error", _ => void 0);
//const combine = streamCombiner(gunzip(), parsing);
parsing.on('finish', function () {
// all entries read
beforeFinish.forEach(fn => fn());
log('finished extracting to ...', folderExtractTo)
//combine.emit("finish");
})
return read.pipe(gunzip()).pipe(parsing);
}
/**
* 解压.zip
*/
function bundleExtractorZip(read, folderExtractTo, sourceUrl, options) {
let concated = new Buffer("");
let parsing = through((buf, _, next) => {
concated = Buffer.concat([concated, buf]);
next(null)
}, flush => {
yauzl.fromBuffer(concated, { lazyEntries : true }, function (err, zipfile) {
if (err) throw err;
zipfile.readEntry();
zipfile.on("entry", function (entry) {
// console.log(entry);
if (/\/$/.test(entry.fileName)) {
// Directory file names end with '/'.
// Note that entires for directories themselves are optional.
// An entry's fileName implicitly requires its parent directories to exist.
zipfile.readEntry();
} else {
// file entry
let fileName = entry.fileName;
let fileNameWritePath;
if (options.isContentZip) {
fileNameWritePath = path.join(folderExtractTo, fileName);
} else {
let fileNamePaths = fileName.split("/");
fileNamePaths[0] = folderExtractTo;
fileNameWritePath = fileNamePaths.join("/");
}
mkdirp.sync(path.dirname(fileNameWritePath));
touch.sync(fileNameWritePath);
let fileNamePaths = fileName.split("/");
zipfile.openReadStream(entry, function (err, readStream) {
if (err) throw err;
readStream.pipe(source(path.basename(fileNameWritePath)))
.pipe(vfs.dest(path.dirname(fileNameWritePath)))
.on('error', error => log('\n' + error.message));
});
zipfile.readEntry();
}
});
zipfile.on("end", _ => {
if (typeof options.afterExtract === "function") {
options.afterExtract(folderExtractTo);
}
parsing.push(concated);
flush()
})
})
})
return read.pipe(parsing);
}
function requestProgressBar(target) {
let isFirstProgress = false;
let bar;
let lastTransferred = 0;
let lastElapsed = 0;
return {
progress: (args) => {
let { percent, speed, size, time } = args;
let { total, transferred } = size;
let { elapsed, remaining } = time;
let dTransferred = transferred - lastTransferred;
lastTransferred = transferred;
let dElapsed = elapsed - lastElapsed;
lastElapsed = elapsed;
if (!isFirstProgress) {
isFirstProgress = true;
log('total', total)
log(`downloading ${target}`)
}
if (!total) {
let rate = dElapsed ? (dTransferred / dElapsed) : 0;
process.stdout.clearLine();
return process.stdout.write(
`... ${rate.toFixed(2)}/bps ${remaining ? remaining : ''}\r`
);
}
if (!bar) {
bar = new progress(
`[:bar] :percent :rate/bps :etas`,
{ total: total, width: 20 }
);
}
bar.tick(dTransferred);
},
complete: () => {
if (!bar) return log("complete ...");
bar.tick(bar.total - bar.curr);
if (bar.complete) {
log("complete ...")
}
}
}
}