fix: have version flag track package.json version

Signed-off-by: Chapman Pendery <cpendery@vt.edu>

src/index.ts

@@ -9,13 +9,14 @@ import { Command } from "commander";
 
 import bind from "./commands/bind.js";
 import { action, supportedShells } from "./commands/root.js";
+import { getVersion } from "./utils/version.js";
 
 const program = new Command();
 
 program
   .name("inshellisense")
   .description("IDE style command line auto complete")
-  .version("0.0.0", "-v, --version", "output the current version")
+  .version(await getVersion(), "-v, --version", "output the current version")
   .option("-s, --shell <shell>", `shell to use for command execution, supported shells: ${supportedShells}`)
   .option("-c, --command <commmand>", "command to use as initial input")
   .option("--history", "get the last command execute")

src/utils/version.ts

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+import url from "node:url";
+import path from "node:path";
+import fsAsync from "node:fs/promises";
+
+const __filename = url.fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+export const getVersion = async (): Promise<string> => {
+  const packageJsonPath = path.join(__dirname, "..", "..", "package.json");
+  const packageJson = await fsAsync.readFile(packageJsonPath, { encoding: "utf-8" });
+  const packageJsonParsed = JSON.parse(packageJson);
+  return packageJsonParsed.version;
+};