chore: Convert help command handling to typescript

src/cli/commands/help.ts

@@ -0,0 +1,22 @@
+import * as fs from 'then-fs';
+import * as path from 'path';
+import * as Debug from 'debug';
+const debug = Debug('snyk');
+
+export async function help(item: string | boolean) {
+  if (!item || item === true || typeof item !== 'string') {
+    item = 'usage';
+  }
+
+  // cleanse the filename to only contain letters
+  // aka: /\W/g but figured this was easier to read
+  item = item.replace(/[^a-z-]/gi, '');
+
+  const filename = path.resolve(__dirname, '../../../help', item + '.txt');
+  try {
+    await fs.readFile(filename, 'utf8');
+  } catch (error) {
+    debug(error);
+    return `'${item}' help can't be found at location: ${filename}`;
+  }
+}

src/cli/commands/test.ts

@@ -10,7 +10,7 @@ import {SEVERITIES, WIZARD_SUPPORTED_PMS} from '../../lib/snyk-test/common';
 import * as Debug from 'debug';
 import {TestOptions} from '../../lib/types';
 import {isLocalFolder} from '../../lib/detect';
-import { MethodArgs, ArgsOptions } from '../args';
+import { MethodArgs } from '../args';
 
 const debug = Debug('snyk');
 const SEPARATOR = '\n-------------------------------------------------------\n';