chore(NA): support yarn install using bazel managed directories for dependencies

preinstall_check.js

@@ -6,34 +6,37 @@
  * Public License, v 1.
  */
 
-const isUsingNpm = process.env.npm_config_git !== undefined;
+(() => {
+  const isUsingNpm = process.env.npm_config_git !== undefined;
 
-if (isUsingNpm) {
-  throw `Use Yarn instead of npm, see Kibana's contributing guidelines`;
-}
-
-// The value of the `npm_config_argv` env for each command:
-//
-// - `npm install`: '{"remain":[],"cooked":["install"],"original":[]}'
-// - `yarn`: '{"remain":[],"cooked":["install"],"original":[]}'
-// - `yarn kbn bootstrap`: '{"remain":[],"cooked":["run","kbn"],"original":["kbn","bootstrap"]}'
-const rawArgv = process.env.npm_config_argv;
-
-if (rawArgv === undefined) {
-  return;
-}
+  if (isUsingNpm) {
+    throw `Use Yarn instead of npm, see Kibana's contributing guidelines`;
+  }
 
-try {
-  const argv = JSON.parse(rawArgv);
+  // The value of the `npm_config_argv` env for each command:
+  //
+  // - `npm install`: '{"remain":[],"cooked":["install"],"original":[]}'
+  // - `yarn`: '{"remain":[],"cooked":["install"],"original":[]}'
+  // - `yarn kbn bootstrap`: '{"remain":[],"cooked":["run","kbn"],"original":["kbn","bootstrap"]}'
+  const rawArgv = process.env.npm_config_argv;
 
-  if (argv.cooked.includes('kbn')) {
-    // all good, trying to install deps using `kbn`
+  if (rawArgv === undefined) {
     return;
   }
 
-  if (argv.cooked.includes('install')) {
-    console.log('\nWARNING: When installing dependencies, prefer `yarn kbn bootstrap`\n');
+  try {
+    const argv = JSON.parse(rawArgv);
+
+    // allow dependencies to be installed with `yarn kbn bootstrap` or `bazel run @nodejs//:yarn` (called under the hood by bazel)
+    if (argv.cooked.includes('kbn') || !!process.env.BAZEL_YARN_INSTALL) {
+      // all good, trying to install deps using `kbn` or bazel directly
+      return;
+    }
+
+    if (argv.cooked.includes('install')) {
+      console.log('\nWARNING: When installing dependencies, prefer `yarn kbn bootstrap`\n');
+    }
+  } catch (e) {
+    // if it fails we do nothing, as this is just intended to be a helpful message
   }
-} catch (e) {
-  // if it fails we do nothing, as this is just intended to be a helpful message
-}
+})();