Build frontend using bun if found.

scripts/build-frontend.py

@@ -11,17 +11,27 @@ class CustomBuildHook(BuildHookInterface):
     def initialize(self, version, build_data):
         super().initialize(version, build_data)
         stderr.write(">>> Building Cista frontend\n")
-        npm = shutil.which("npm")
+        npm = None
-        if npm is None:
+        bun = shutil.which("bun")
-            raise RuntimeError(
+        if bun is None:
-                "NodeJS `npm` is required for building Cista but it was not found"
+            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:
-            stderr.write("### npm install\n")
+            if npm:
-            subprocess.run([npm, "install"], check=True)  # noqa: S603
+                stderr.write("### npm install\n")
-            stderr.write("\n### npm run build\n")
+                subprocess.run([npm, "install"], check=True)  # noqa: S603
-            subprocess.run([npm, "run", "build"], check=True)  # noqa: S603
+                stderr.write("\n### npm run build\n")
+                subprocess.run([npm, "run", "build"], check=True)  # noqa: S603
+            else:
+                assert bun
+                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("..")