feat: Add -v/--version flags to CLI (#137)

* Initial plan

* Add --version and -v flags to CLI

Co-authored-by: nzakas <38546+nzakas@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: nzakas <38546+nzakas@users.noreply.github.com>

Author: nzakas

src/bin.js

@@ -70,13 +70,21 @@ const options = {
 	image: { type: stringType },
 	"image-alt": { type: stringType },
 	help: { type: booleanType, short: "h" },
+	version: { type: booleanType, short: "v" },
 };
 
 const { values: flags, positionals } = parseArgs({
 	options,
 	allowPositionals: true,
 });
 
+if (flags.version) {
+	const packagePath = new URL("../package.json", import.meta.url);
+	const packageJson = JSON.parse(fs.readFileSync(packagePath, "utf8"));
+	console.log(packageJson.version);
+	process.exit(0);
+}
+
 if (flags.mcp && flags.file) {
 	console.error("Error: --file cannot be used with --mcp");
 	process.exit(1);
@@ -111,6 +119,7 @@ if (
 	console.log("--image		The image file to upload with the message.");
 	console.log("--image-alt	Alt text for the image (default: filename).");
 	console.log("--help, -h	Show this message.");
+	console.log("--version, -v	Show version number.");
 	process.exit(1);
 }
 

tests/bin.test.js

@@ -11,13 +11,15 @@
 
 import { strict as assert } from "node:assert";
 import { fork } from "node:child_process";
+import fs from "node:fs";
 import path from "node:path";
 
 //-----------------------------------------------------------------------------
 // Data
 //-----------------------------------------------------------------------------
 
 const executablePath = path.resolve("src/bin.js");
+const builtExecutablePath = path.resolve("dist/bin.js");
 
 //-----------------------------------------------------------------------------
 // Tests
@@ -55,4 +57,65 @@ describe("bin", function () {
 			done();
 		});
 	});
+
+	describe("version flag", function () {
+		it("should display version with --version flag", done => {
+			const child = fork(builtExecutablePath, ["--version"], {
+				stdio: "pipe",
+			});
+
+			let output = "";
+
+			child.stdout.on("data", data => {
+				output += data.toString();
+			});
+
+			child.on("exit", code => {
+				assert.strictEqual(code, 0);
+				assert.match(output.trim(), /^\d+\.\d+\.\d+$/);
+				done();
+			});
+		});
+
+		it("should display version with -v flag", done => {
+			const child = fork(builtExecutablePath, ["-v"], {
+				stdio: "pipe",
+			});
+
+			let output = "";
+
+			child.stdout.on("data", data => {
+				output += data.toString();
+			});
+
+			child.on("exit", code => {
+				assert.strictEqual(code, 0);
+				assert.match(output.trim(), /^\d+\.\d+\.\d+$/);
+				done();
+			});
+		});
+
+		it("should display correct version from package.json", done => {
+			// Read the actual version from package.json
+			const packagePath = path.resolve("package.json");
+			const packageJson = JSON.parse(fs.readFileSync(packagePath, "utf8"));
+			const expectedVersion = packageJson.version;
+
+			const child = fork(builtExecutablePath, ["--version"], {
+				stdio: "pipe",
+			});
+
+			let output = "";
+
+			child.stdout.on("data", data => {
+				output += data.toString();
+			});
+
+			child.on("exit", code => {
+				assert.strictEqual(code, 0);
+				assert.strictEqual(output.trim(), expectedVersion);
+				done();
+			});
+		});
+	});
 });