Init

.gitignore

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+node_modules

.prettierrc.json

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+{
+ "printWidth": 100,
+ "tabWidth": 4,
+ "trailingComma": "all",
+ "singleQuote": true
+}

blocko.json

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+{
+ "hosts": [
+ "wsj.com",
+ "news.ycombinator.com",
+ "reddit.com",
+ "xkcd.com",
+ "bbc.com",
+ "bbc.co.uk",
+ "news.google.com",
+ "theguardian.com",
+ "twitter.com",
+ "imgur.com",
+ "instagram.com",
+ "wired.com",
+ "theverge.com",
+ "youtube.com",
+ "genius.com",
+ "buzzfeed.com",
+ "facebook.com",
+ "vox.com",
+ "medium.com",
+ "hckrnews.com",
+ "outline.com",
+ "theatlantic.com",
+ "telegraph.co.uk",
+ "linkedin.com",
+ "forbes.com",
+ "minimal.news",
+ "techcrunch.com",
+ "businessinsider.com"
+ ]
+}

index.js

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+const fs = require('fs');
+const path = require('path');
+const _ = require('lodash');
+const meow = require('meow');
+
+const cli = meow(
+ `
+ Usage
+ $ blocko
+
+ Options
+ --hosts-file, -h Path to the hosts file
+`,
+ {
+ flags: {
+ 'hosts-file': {
+ type: 'string',
+ alias: 'h',
+ default: '/etc/hosts',
+ },
+ },
+ },
+);
+
+const BEGIN_MARKER = '# BEGIN BLOCKO';
+const END_MARKER = '# END BLOCKO';
+
+const makeEntry = host => `0.0.0.0 ${host}\n:: ${host}\n`;
+
+function generateBlockString(hosts) {
+ let str = `${BEGIN_MARKER}\n`;
+
+ hosts.forEach(host => {
+ str += makeEntry(host);
+ str += makeEntry(`www.${host}`);
+ });
+
+ str += END_MARKER;
+
+ return str;
+}
+
+const config = JSON.parse(fs.readFileSync(path.join(__dirname, 'blocko.json'), 'utf-8'));
+
+// fs.closeSync(fs.openSync(cli.flags.hostsFile, 'w'));
+
+const currentHosts = fs.readFileSync(cli.flags.hostsFile, 'utf-8');
+
+const blockString = generateBlockString(config.hosts);
+
+const startLocation = currentHosts.indexOf(BEGIN_MARKER);
+const endLocation = currentHosts.indexOf(END_MARKER);
+
+let newHosts;
+if (startLocation > -1 && endLocation > -1) {
+ newHosts =
+ currentHosts.substr(0, startLocation) +
+ blockString +
+ currentHosts.substr(endLocation + END_MARKER.length);
+} else {
+ newHosts = `${currentHosts}\n${blockString}`;
+}
+
+fs.writeFileSync(cli.flags.hostsFile, newHosts);

package.json

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+{
+ "name": "blocko",
+ "version": "1.0.0",
+ "main": "index.js",
+ "license": "MIT",
+ "dependencies": {
+ "lodash": "^4.17.14",
+ "meow": "^5.0.0"
+ }
+}