From 72961e45642f55e686c99091d8a6e7fbd0da2d55 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Sat, 20 Feb 2021 14:05:12 -0500
Subject: [PATCH] fix: add regenerate-unicode-properties to
 dynamicRequireTargets (#12819)
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Co-authored-by: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>
---
 Gulpfile.mjs                            | 22 ++++++++++++++++++++++
 packages/babel-standalone/test/babel.js |  7 +++++++
 2 files changed, 29 insertions(+)

diff --git a/Gulpfile.mjs b/Gulpfile.mjs
index 8cddaf0f479a..152ac8017ec6 100644
--- a/Gulpfile.mjs
+++ b/Gulpfile.mjs
@@ -237,6 +237,19 @@ function buildBabel(exclude) {
     .pipe(gulp.dest(base));
 }
 
+/**
+ * Resolve a nested dependency starting from the given file
+ */
+function resolveChain(baseUrl, ...packages) {
+  const require = createRequire(baseUrl);
+
+  return packages.reduce(
+    (base, pkg) =>
+      require.resolve(pkg + "/package.json", { paths: [path.dirname(base)] }),
+    fileURLToPath(baseUrl)
+  );
+}
+
 // If this build is part of a pull request, include the pull request number in
 // the version number.
 let versionSuffix = "";
@@ -292,6 +305,15 @@ function buildRollup(packages, targetBrowsers) {
               "packages/babel-compat-data/*.js",
               "packages/*/src/**/*.cjs",
             ],
+            dynamicRequireTargets: [
+              // https://github.com/mathiasbynens/regexpu-core/blob/ffd8fff2e31f4597f6fdfee75d5ac1c5c8111ec3/rewrite-pattern.js#L48
+              resolveChain(
+                import.meta.url,
+                "./packages/babel-helper-create-regexp-features-plugin",
+                "regexpu-core",
+                "regenerate-unicode-properties"
+              ) + "/../**",
+            ],
           }),
           rollupBabel({
             envName: babelEnvName,
diff --git a/packages/babel-standalone/test/babel.js b/packages/babel-standalone/test/babel.js
index 1afeb7baabf3..3858571e3963 100644
--- a/packages/babel-standalone/test/babel.js
+++ b/packages/babel-standalone/test/babel.js
@@ -217,6 +217,13 @@
           }),
         ).not.toThrow();
       });
+      it("#12815 - unicode property letter short alias should be transformed", () => {
+        expect(() =>
+          Babel.transform("/\\p{L}/u", {
+            plugins: ["proposal-unicode-property-regex"],
+          }),
+        ).not.toThrow();
+      });
     });
   },
 );