Automating release post

scripts/release-post.js

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+#!/usr/bin/env node
+
+'use strict';
+
+const https = require('https');
+const fs = require('fs');
+const path = require('path');
+const extend = require('util')._extend;
+const Handlebars = require('handlebars');
+
+function download (url, cb) {
+    return new Promise(function (resolve, reject) {
+        let data = '';
+        https.get(url, function (res) {
+            if (res.statusCode !== 200) {
+                return reject(new Error('Invalid status code (!= 200) while retrieving '+ url +': '+ res.statusCode));
+            }
+
+            res.on('data', function (chunk) { data += chunk; });
+            res.on('end', function () { resolve(data); });
+        }).on('error', function (err) {
+            reject(new Error('Error downloading file from %s: %s', url, err.message));
+        });
+    });
+}
+
+// matches a complete release section, support both old node and iojs releases:
+// ## 2015-07-09, Version 0.12.7 (Stable)
+// ## 2015-08-04, Version 3.0.0, @rvagg
+const rxReleaseSection = /## \d{4}-\d{2}-\d{2}, Version ([^,( ]+)[\s\S]*?(?=## \d{4})/g;
+
+function findLatestVersion (cb) {
+    return download('https://nodejs.org/dist/index.json')
+            .then(JSON.parse)
+            .then(function (versions) {
+                return versions[0].version.substr(1);
+            });
+}
+
+function fetchDocs (version) {
+    return Promise.all([ fetchChangelog(version), fetchShasums(version) ]).then(function (results) {
+        const changelog = results[0];
+        const shasums = results[1];
+
+        return {
+            version,
+            changelog,
+            shasums
+        };
+    });
+}
+
+function fetchChangelog (version) {
+    return download('https://raw.githubusercontent.com/nodejs/node/master/CHANGELOG.md')
+            .then(function (data) {
+                let matches;
+
+                while (matches = rxReleaseSection.exec(data)) {
+                    const releaseVersion = matches[1];
+                    if (releaseVersion === version) {
+                        return matches[0];
+                    }
+                }
+
+                return Promise.reject(new Error('Couldnt find matching changelog for ' + version));
+            });
+}
+
+function fetchShasums (version) {
+    return download(`https://nodejs.org/dist/v${version}/SHASUMS256.txt.asc`);
+}
+
+function renderPost (results) {
+    const templateStr = fs.readFileSync(path.resolve(__dirname, 'release.hbs')).toString('utf8');
+    const template = Handlebars.compile(templateStr, { noEscape: true });
+    const view = extend({
+        date: new Date().toISOString(),
+        versionSlug: slugify(results.version)
+    }, results);
+
+    return extend({
+        content: template(view)
+    }, results);
+}
+
+function writeToFile (results) {
+    const filepath = path.resolve(__dirname, '..', 'locale', 'en', 'blog', 'release', `v${results.version}.md`);
+
+    if (fs.existsSync(filepath)) {
+        return Promise.reject(new Error(`Release post for ${results.version} already exists!`));
+    }
+
+    fs.writeFileSync(filepath, results.content);
+    return Promise.resolve(filepath);
+}
+
+function slugify (str) {
+    return str.replace(/\./g, '-');
+}
+
+findLatestVersion()
+    .then(fetchDocs)
+    .then(renderPost)
+    .then(writeToFile)
+    .then(function (filepath) {
+        console.log('Release post created:', filepath);
+    }, function (err) {
+        console.error('Some error occured here!', err.stack);
+        process.exit(1);
+    });

scripts/release.hbs

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+---
+date: {{date}}
+version: {{version}}
+category: release
+title: Node v{{version}} (Stable)
+slug: node-v{{versionSlug}}-stable
+layout: blog-post.hbs
+---
+
+{{changelog}}
+
+Windows 32-bit Installer: http://nodejs.org/dist/v{{version}}/node-v{{version}}-x86.msi
+
+Windows 64-bit Installer: http://nodejs.org/dist/v{{version}}/node-v{{version}}-x64.msi
+
+Windows 32-bit Binary: http://nodejs.org/dist/v{{version}}/win-x86/node.exe
+
+Windows 64-bit Binary: http://nodejs.org/dist/v{{version}}/win-x64/node.exe
+
+Mac OS X 64-bit Installer: http://nodejs.org/dist/v{{version}}/node-v{{version}}.pkg
+
+Mac OS X 64-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-darwin-x64.tar.gz
+
+Linux 32-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-linux-x86.tar.gz
+
+Linux 64-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-linux-x64.tar.gz
+
+SunOS 32-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-sunos-x86.tar.gz
+
+SunOS 64-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-sunos-x64.tar.gz
+
+ARMv6 32-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-linux-armv6l.tar.gz
+
+ARMv7 32-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-linux-armv7l.tar.gz
+
+ARMv8 64-bit Binary: http://nodejs.org/dist/v{{version}}/node-v{{version}}-linux-arm64.tar.gz
+
+Source Code: http://nodejs.org/dist/v{{version}}/node-v{{version}}.tar.gz
+
+Other release files: http://nodejs.org/dist/v{{version}}/
+
+Website: http://nodejs.org/docs/v{{version}}/
+
+Documentation: http://nodejs.org/docs/v{{version}}/api/
+
+Shasums:
+```
+{{shasums}}
+```