From 564ca6638f2ef278c78dde72d208fa68eeb38836 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=B2=20Ribaudo?= <nicolo.ribaudo@gmail.com>
Date: Tue, 23 Mar 2021 20:11:10 +0100
Subject: [PATCH] Set `rootMode: "root"` in `loadPartialConfig` (#13040)

---
 packages/babel-core/src/config/partial.js     |  1 +
 packages/babel-core/test/config-chain.js      |  1 +
 packages/babel-core/test/config-loading.js    | 19 +++++++++++++++++++
 .../config-loading/root/babel.config.json     |  1 +
 4 files changed, 22 insertions(+)
 create mode 100644 packages/babel-core/test/fixtures/config-loading/root/babel.config.json

diff --git a/packages/babel-core/src/config/partial.js b/packages/babel-core/src/config/partial.js
index 5d74daa00e..dc0a0e0229 100644
--- a/packages/babel-core/src/config/partial.js
+++ b/packages/babel-core/src/config/partial.js
@@ -139,6 +139,7 @@ export default function* loadPrivatePartialConfig(
     envName: context.envName,
     cwd: context.cwd,
     root: context.root,
+    rootMode: "root",
     filename:
       typeof context.filename === "string" ? context.filename : undefined,
 
diff --git a/packages/babel-core/test/config-chain.js b/packages/babel-core/test/config-chain.js
index 7e345fd013..68c204603b 100644
--- a/packages/babel-core/test/config-chain.js
+++ b/packages/babel-core/test/config-chain.js
@@ -982,6 +982,7 @@ describe("buildConfigChain", function () {
       browserslistConfigFile: false,
       cwd: process.cwd(),
       root: process.cwd(),
+      rootMode: "root",
       envName: "development",
       passPerPreset: false,
       plugins: [],
diff --git a/packages/babel-core/test/config-loading.js b/packages/babel-core/test/config-loading.js
index da84e590d4..dcdf0ceb64 100644
--- a/packages/babel-core/test/config-loading.js
+++ b/packages/babel-core/test/config-loading.js
@@ -118,6 +118,25 @@ describe("@babel/core config loading", () => {
       expect(item.value).toBe(preset);
       expect(item.options).toBe(false);
     });
+
+    it("should always set 'rootMode' to 'root'", async () => {
+      const cwd = path.join(
+        path.dirname(fileURLToPath(import.meta.url)),
+        "fixtures",
+        "config-loading",
+        "root",
+        "nested",
+      );
+
+      const { options } = await loadPartialConfig({
+        cwd,
+        filename: path.join(cwd, "file.js"),
+        rootMode: "upward",
+      });
+
+      expect(options.root).toBe(path.join(cwd, ".."));
+      expect(options.rootMode).toBe("root");
+    });
   });
 
   describe("config file", () => {
diff --git a/packages/babel-core/test/fixtures/config-loading/root/babel.config.json b/packages/babel-core/test/fixtures/config-loading/root/babel.config.json
new file mode 100644
index 0000000000..0967ef424b
--- /dev/null
+++ b/packages/babel-core/test/fixtures/config-loading/root/babel.config.json
@@ -0,0 +1 @@
+{}