[6.x] [eslint] lint packages, but not eslint-* ones (#16470) (#16471)

.eslintignore

@@ -8,4 +8,8 @@
 /src/ui/public/utils/decode_geo_hash.js
 /src/core_plugins/timelion/public/webpackShims/jquery.flot.*
 /ui_framework/doc_site/build
-/tasks/vendor
+/tasks/vendor
+/packages/*/node_modules
+/packages/eslint-config-kibana
+/packages/eslint-plugin-kibana-custom
+/packages/kbn-build/dist

packages/kbn-build/src/cli.js

@@ -8,7 +8,7 @@ import { runCommand } from './run';
 
 function help() {
   const availableCommands = Object.keys(commands)
-    .map(commandName => commands[commandName])
+    .map(commandName => commands[commandName]) // eslint-disable-line import/namespace
     .map(command => `${command.name} - ${command.description}`);
 
   console.log(dedent`
@@ -51,7 +51,7 @@ export async function run(argv) {
 
   const commandOptions = { options, extraArgs, rootPath };
 
-  const command = commands[commandName];
+  const command = commands[commandName]; // eslint-disable-line import/namespace
   if (command === undefined) {
     console.log(
       chalk.red(`[${commandName}] is not a valid command, see 'kbn --help'`)

src/dev/eslint/default_eslint_paths.js

@@ -6,6 +6,7 @@ export const DEFAULT_ESLINT_PATHS = [
   'scripts',
   'tasks',
   'test',
+  'packages',
   'ui_framework/src',
   'ui_framework/doc_site/src',
   'ui_framework/generator_kui',