[build] added gulp builder

tasks/sdk.js

@@ -0,0 +1,77 @@
+"use strict";
+const os = require('os');
+const gulp = require('gulp');
+const gutil = require('gulp-util');
+const col = gutil.colors;
+const download = require('./download');
+const unzip = require('gulp-unzip');
+const gunzip = require('gulp-gunzip');
+const untar = require('gulp-untar');
+const Promise = require('bluebird');
+const ProgressBar = require('progress');
+
+class Sdk {
+    static set dir(value) {
+        Sdk._dir = value
+    }
+
+    static get dir() {
+        return Sdk._dir || `${os.homedir()}/sdk`;
+    }
+
+    static path(name, version) {
+        return `${this.dir}/${name}/${version}`;
+    }
+
+    constructor(name, version) {
+        this.name = name;
+        this.tag = col.green(`[${name}]`);
+        this.version = version;
+        this.path = Sdk.path(name, version);
+    }
+
+    get intVersion() {
+        const vArr = this.version.split('\.').reverse();
+        let m = 1;
+        let r = 0;
+        for (let v of vArr) {
+            r += parseInt(v) * m;
+            m *= 10;
+        }
+        return r;
+    }
+
+    get prepared() {
+        throw "Not implemented";
+    }
+
+    get link() {
+        throw "Not implemented";
+    }
+
+    prepare() {
+        gutil.log(this.tag, `version: ${col.magenta(this.version)}`);
+        return new Promise((success, fail) => {
+            if (this.prepared) {
+                success();
+            } else {
+                const bar = new ProgressBar(`${this.tag} [:bar] :percent :etas`, {width: 40, total: 1000, clear: true});
+                let stream = download(this.link)
+                    .on('error', fail)
+                    .on('progress', (p) => bar.update(p.percent))
+                    .on('end', () => bar.update(1));
+                if (this.link.endsWith('.zip')) {
+                    stream = stream.pipe(unzip());
+                } else if (this.link.endsWith('tar.gz')) {
+                    stream = stream.pipe(gunzip()).pipe(untar())
+                }
+                return stream
+                    .pipe(gulp.dest(this.path))
+                    .on('end', success)
+                    .on('error', fail);
+            }
+        });
+    }
+}
+
+module.exports = Sdk;