Added version argument

Author: AndreasArvidsson

src/cli/cli.ts

@@ -5,6 +5,7 @@ import type { CLI } from "../types.js";
 import { EXIT_ERROR, EXIT_FAIL, EXIT_OK } from "../util/constants.js";
 import { parseArgs } from "../util/parseArgs.js";
 import { printHelp } from "../util/printHelp.js";
+import { printVersion } from "../util/printVersion.js";
 
 export async function main(cli: CLI): Promise<void> {
     try {
@@ -24,6 +25,11 @@ async function mainUnsafe(cli: CLI): Promise<number> {
         return EXIT_OK;
     }
 
+    if (args.version) {
+        printVersion();
+        return EXIT_OK;
+    }
+
     const hasFilePatterns = args.filePatterns.length > 0;
 
     if (hasFilePatterns) {

src/test/cli.test.ts

@@ -108,6 +108,7 @@ suite("CLI", () => {
         const expected: ParsedArgs = {
             filePatterns: ["a.txt", "b.txt"],
             help: false,
+            version: false,
             check: true,
         };
         const actual = parseArgs(["--check", "a.txt", "b.txt"]);
@@ -119,6 +120,7 @@ suite("CLI", () => {
         const expected: ParsedArgs = {
             filePatterns: ["--check"],
             help: false,
+            version: false,
             check: true,
         };
         const actual = parseArgs(["--check", "--", "--check"]);

src/types.ts

@@ -7,5 +7,6 @@ export interface CLI {
 export interface ParsedArgs {
     filePatterns: string[];
     help: boolean;
+    version: boolean;
     check: boolean;
 }

src/util/parseArgs.ts

@@ -2,7 +2,7 @@
 
 import type { ParsedArgs } from "../types.js";
 
-export const KNOWN_ARGUMENTS = ["--help", "--check"] as const;
+export const KNOWN_ARGUMENTS = ["--help", "--version", "--check"] as const;
 
 type KnownArgument = (typeof KNOWN_ARGUMENTS)[number];
 type ArgHandler = (parsedArgs: ParsedArgs) => void;
@@ -11,6 +11,9 @@ const ARG_HANDLERS: Record<KnownArgument, ArgHandler> = {
     "--help": (parsedArgs) => {
         parsedArgs.help = true;
     },
+    "--version": (parsedArgs) => {
+        parsedArgs.version = true;
+    },
     "--check": (parsedArgs) => {
         parsedArgs.check = true;
     },
@@ -20,6 +23,7 @@ export function parseArgs(argv: string[]): ParsedArgs {
     const result: ParsedArgs = {
         filePatterns: [],
         help: false,
+        version: false,
         check: false,
     };
 

src/util/printVersion.ts

@@ -0,0 +1,5 @@
+import packageJson from "../../package.json" with { type: "json" };
+
+export function printVersion() {
+    console.log(packageJson.version);
+}

tsconfig.json

@@ -5,6 +5,7 @@
         "moduleResolution": "nodenext",
         "rootDir": "src",
         "esModuleInterop": true,
+        "resolveJsonModule": true,
         "noEmit": true,
         "strict": true,
         "noImplicitAny": true,