add version and help CLI flags

bcheidemann · Aug 13, 2023 · 7bc7ab1 · 7bc7ab1
1 parent 0b37791
commit 7bc7ab1
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Showing 3 changed files with 33 additions and 0 deletions.
diff --git a/lib/cli/parse-args.ts b/lib/cli/parse-args.ts
@@ -21,6 +21,12 @@ export function parseLangArgs(context: ParseLangArgsContext): Config {
       case "--lang":
       case "-l":
         return parseLangArg(context);
+      case "--help":
+      case "-h":
+        return parseHelpArg(context);
+      case "--version":
+      case "-v":
+        return parseVersionArg(context);
       default:
         return parseFileArg(context, arg);
     }
@@ -57,6 +63,23 @@ export function parseLangArg(
   }
 }
 
+export function parseHelpArg(
+  _context: ParseLangArgsContext,
+): Config {
+  return {
+    help: true,
+    invalidArgs: false,
+  };
+}
+
+export function parseVersionArg(
+  _context: ParseLangArgsContext,
+): Config {
+  return {
+    version: true,
+  };
+}
+
 export function parseFileArg(
   context: ParseLangArgsContext,
   arg: string,

diff --git a/lib/cli/types.ts b/lib/cli/types.ts
@@ -6,11 +6,16 @@ export type HelpConfig = {
   message?: string;
 };
 
+export type VersionConfig = {
+  version: true;
+};
+
 export type LangConfig = {
   lang: Lang;
   files: string[];
 };
 
 export type Config =
   | HelpConfig
+  | VersionConfig
   | LangConfig;
diff --git a/main.ts b/main.ts
@@ -25,6 +25,11 @@ async function main(args: string[]): Promise<0 | 1> {
     return 0;
   }
 
+  if ("version" in config) {
+    console.log("1.0.1");
+    return 0;
+  }
+
   if ("lang" in config) {
     let exitStatusCode: 0 | 1 = 0;