Add cli

Author: perry-mitchell

package.json

@@ -29,11 +29,13 @@
   "react-native": "./dist/browser/index.cjs",
   "types": "dist/index.d.ts",
   "sideEffects": false,
+  "bin": "./dist/cli.js",
   "scripts": {
     "bench": "npm run build && node test/benchmark.js",
-    "build": "npm run clean && npm run build:node:cjs && npm run build:node:esm && npm run build:browser:cjs && npm run build:browser:esm && npm run build:types",
+    "build": "npm run clean && npm run build:node:cjs && npm run build:node:esm && npm run build:browser:cjs && npm run build:browser:esm && npm run build:cli && npm run build:types",
     "build:browser:cjs": "FMT=cjs ENV=browser rollup -c --name ulidx",
     "build:browser:esm": "FMT=esm ENV=browser rollup -c --name ulidx",
+    "build:cli": "FMT=esm ENV=cli rollup -c && chmod +x ./dist/cli.js",
     "build:node:cjs": "FMT=cjs ENV=node rollup -c",
     "build:node:esm": "FMT=esm ENV=node rollup -c",
     "build:types": "tsc -p tsconfig.dec.json --emitDeclarationOnly  && find ./dist -name '*.d.ts' -exec sh -c 'cp {} $(dirname {})/$(basename -s .d.ts {}).d.cts' \\;",

rollup.config.js

@@ -8,6 +8,9 @@ const EXTENSIONS = [".js", ".ts"];
 const ENV = process.env.ENV ? process.env.ENV : "node";
 const FMT = process.env.FMT ? process.env.FMT : "esm";
 
+const entry = ENV === "cli" ? "source/cli.ts" : "source/index.ts";
+const output = ENV === "cli" ? "dist" : `dist/${ENV}`;
+
 const plugins = [
     typescript({
         tsconfig: "tsconfig.json"
@@ -29,10 +32,10 @@ const externals =
 
 export default {
     external: externals,
-    input: "source/index.ts",
+    input: entry,
     output: [
         {
-            dir: `dist/${ENV}`,
+            dir: output,
             format: FMT,
             entryFileNames: `[name].${extension}`
         }

source/cli.ts

@@ -0,0 +1,40 @@
+#!/usr/bin/env node
+
+import { monotonicFactory } from "./ulid.js";
+
+function parseArgs(args: Array<string>): Record<string, string | boolean> {
+    const output = {};
+
+    while (args.length > 0) {
+        const arg = args.shift();
+
+        if (/^\-\-/.test(arg)) {
+            if (/=/.test(arg)) {
+                const [key, value] = arg.split("=");
+                output[key.substring(2)] = value;
+            } else {
+                const value = args.shift();
+
+                if (/^-/.test(value)) {
+                    args.unshift(value);
+                } else if (!value) {
+                    output[arg.substring(2)] = true;
+                } else {
+                    output[arg.substring(2)] = value;
+                }
+            }
+        }
+    }
+
+    return output;
+}
+
+const argv = parseArgs(process.argv.slice(2));
+
+const count = /^\d+/.test(argv["count"] as string) ? parseInt(argv["count"] as string, 10) : 1;
+
+const factory = monotonicFactory();
+
+for (let i = 0; i < count; i += 1) {
+    console.log(factory());
+}