add 'sync packages' tasks that create pkg

- these sub-pkg are made in build/
- they all include a (minimal) README and package.json
- at the moment, they include only one un-minified bundle file

Author: etpinard

tasks/sync_packages.js

@@ -0,0 +1,102 @@
+var path = require('path');
+var fs = require('fs-extra');
+var exec = require('child_process').exec;
+var runSeries = require('run-series');
+
+var common = require('./util/common');
+var constants = require('./util/constants');
+var pkg = require('../package.json');
+
+var packagesSpecs = constants.partialBundlePaths
+    .map(function(d) {
+        return {
+            name: 'plotly.js-' + d.name + '-dist',
+            main: 'plotly-' + d.name + '.js',
+            dist: d.dist,
+            desc: 'Ready-to-use plotly.js ' + d.name + ' distributed bundle',
+        };
+    })
+    .concat([{
+        name: 'plotly.js-dist',
+        main: 'plotly.js',
+        dist: constants.pathToPlotlyDist,
+        desc: 'Ready-to-use plotly.js distributed bundle',
+    }]);
+
+packagesSpecs.forEach(function(d) {
+    var pkgPath = path.join(constants.pathToBuild, d.name);
+
+    function initDirectory(cb) {
+        if(!common.doesDirExist(pkgPath)) {
+            fs.mkdir(pkgPath, cb);
+        }
+    }
+
+    function writePackageJSON(cb) {
+        var cnt = {
+            name: d.name,
+            version: pkg.version,
+            description: d.desc,
+            license: pkg.license,
+            main: d.main,
+            repository: pkg.repository,
+            bugs: pkg.bugs,
+            author: pkg.author,
+            keywords: pkg.keywords
+        };
+
+        fs.writeFile(
+            path.join(pkgPath, 'package.json'),
+            JSON.stringify(cnt, null, 2),
+            cb
+        );
+    }
+
+    function writeREADME(cb) {
+        var cnt = [
+            '# ' + d.name,
+            '',
+            d.desc,
+            '',
+            'For more info on plotly.js, go to https://github.com/plotly/plotly.js',
+            '',
+            '## Copyright and license',
+            '',
+            'Code and documentation copyright 2018 Plotly, Inc.',
+            '',
+            'Code released under the [MIT license](https://github.com/plotly/plotly.js/blob/master/LICENSE).',
+            '',
+            'Docs released under the [Creative Commons license](https://github.com/plotly/documentation/blob/source/LICENSE).',
+            ''
+        ];
+
+        fs.writeFile(
+            path.join(pkgPath, 'README.md'),
+            cnt.join('\n'),
+            cb
+        );
+    }
+
+    function copyDist(cb) {
+        fs.copy(d.dist, path.join(pkgPath, d.main), cb);
+    }
+
+    function publishToNPM(cb) {
+        exec('npm publish', {cwd: pkgPath}, cb).stdout.pipe(process.stdout);
+    }
+
+    // TODO
+    // - add minified file?
+    // - what to do with dist/topojson/
+    // - what to do with mathjax/
+
+    runSeries([
+        initDirectory,
+        writePackageJSON,
+        writeREADME,
+        copyDist,
+        publishToNPM
+    ], function(err) {
+        if(err) throw err;
+    });
+});