Build frontend as part of Python build

pyproject.toml

@@ -38,3 +38,7 @@ known-first-party = ["passkeyauth"]
 
 [project.scripts]
 serve = "passkeyauth.main:main"
+
+[tool.hatch.build]
+artifacts = ["passkeyauth/frontend-static"]
+targets.sdist.hooks.custom.path = "scripts/build-frontend.py"

scripts/build-frontend.py

@@ -0,0 +1,36 @@
+# noqa: INP001
+import os
+import shutil
+import subprocess
+from sys import stderr
+
+from hatchling.builders.hooks.plugin.interface import BuildHookInterface
+
+
+class CustomBuildHook(BuildHookInterface):
+    def initialize(self, version, build_data):
+        super().initialize(version, build_data)
+        stderr.write(">>> Building Jacloud frontend\n")
+        npm = None
+        bun = shutil.which("bun")
+        if bun is None:
+            npm = shutil.which("npm")
+            if npm is None:
+                raise RuntimeError(
+                    "Bun or NodeJS `npm` is required for building but neither was found"
+                )
+        # npm --prefix doesn't work on Windows, so we chdir instead
+        os.chdir("frontend")
+        try:
+            if npm:
+                stderr.write("### npm install\n")
+                subprocess.run([npm, "install"], check=True)  # noqa: S603
+                stderr.write("\n### npm run build\n")
+                subprocess.run([npm, "run", "build"], check=True)  # noqa: S603
+            else:
+                stderr.write("### bun install\n")
+                subprocess.run([bun, "install"], check=True)  # noqa: S603
+                stderr.write("\n### bun run build\n")
+                subprocess.run([bun, "run", "build"], check=True)  # noqa: S603
+        finally:
+            os.chdir("..")