tools: move eslint from tools to tools/node_modules

This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.

Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/pseudomap/map.js b/tools/node_modules/eslint/node_modules/pseudomap/map.js
new file mode 100644
index 0000000000..7db1599461
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/pseudomap/map.js
@@ -0,0 +1,9 @@
+if (process.env.npm_package_name === 'pseudomap' &&
+    process.env.npm_lifecycle_script === 'test')
+  process.env.TEST_PSEUDOMAP = 'true'
+
+if (typeof Map === 'function' && !process.env.TEST_PSEUDOMAP) {
+  module.exports = Map
+} else {
+  module.exports = require('./pseudomap')
+}