Add CLI

cli.js

@@ -0,0 +1,41 @@
+#!/usr/bin/env node
+
+let help = `
+Usage: mini-svg-data-uri <source> [dest]
+
+Options:
+-v, --version  Output the version number
+-h, --help     Display help for command
+
+Examples:
+  mini-svg-data-uri file.svg           Write to stdout
+  mini-svg-data-uri icon.svg icon.uri  Write to file
+`;
+
+let [source, dest] = process.argv.slice(2);
+
+switch (source) {
+  case '-h':
+  case '--help':
+  case undefined:
+    console.log(help);
+    process.exit();
+
+  case '-v':
+  case '--version':
+    console.log(require('./package').version);
+    process.exit();
+}
+
+const fs = require('fs');
+const svgToMiniDataURI = require('.');
+
+fs.readFile(source, 'utf8', (err, data) => {
+  if (err) {
+    console.error(err.message);
+    console.log(help);
+    process.exit(1);
+  }
+  const out = svgToMiniDataURI(data);
+  dest ? fs.writeFileSync(out) : console.log(out);
+});

package.json

@@ -4,6 +4,7 @@
   "description": "Small, efficient encoding of SVG data URIs for CSS, HTML, etc.",
   "main": "index.js",
   "types": "index.d.ts",
+  "bin": "cli.js",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/tigt/mini-svg-data-uri.git"