bin: remove epilogue, direct to in-repo docs instead

bin/concurrently.ts

@@ -5,7 +5,10 @@ import { hideBin } from 'yargs/helpers';
 
 import * as defaults from '../src/defaults';
 import { concurrently } from '../src/index';
-import { epilogue } from './epilogue';
+import { readPackage } from './read-package';
+
+const version = String(readPackage().version);
+const epilogue = `For documentation and more examples, visit:\nhttps://github.com/open-cli-tools/concurrently/tree/v${version}/docs`;
 
 // Clean-up arguments (yargs expects only the arguments after the program name)
 const args = yargs(hideBin(process.argv))
@@ -18,7 +21,7 @@ const args = yargs(hideBin(process.argv))
     .usage('$0 [options] <command ...>')
     .help('h')
     .alias('h', 'help')
-    .version()
+    .version(version)
     .alias('version', 'v')
     .alias('version', 'V')
     // TODO: Add some tests for this.

bin/read-package.ts

@@ -0,0 +1,23 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+/**
+ * Traverses the directory tree until a package.json file is found.
+ *
+ * @throws if the root directory is reached, and no package.json is found.
+ */
+export function readPackage(): Record<string, unknown> {
+    let dir = require.main?.path ?? process.cwd();
+    let oldDir = dir;
+    do {
+        const pkgPath = path.join(dir, 'package.json');
+        if (fs.existsSync(pkgPath)) {
+            return JSON.parse(fs.readFileSync(pkgPath, 'utf-8'));
+        }
+
+        oldDir = dir;
+        dir = path.dirname(dir);
+    } while (oldDir !== dir);
+
+    throw new Error('package.json not found');
+}