manually install peer dependencies

Author: Archmonger

setup.py

@@ -119,6 +119,13 @@ def run(self):
                 npm = shutil.which("npm")  # this is required on windows
                 if npm is None:
                     raise RuntimeError("NPM is not installed.")
+
+                # Required on when using NPM >3
+                log.info(f"> Installing rollup, react, and react-dom")
+                subprocess.run(f"{npm} install rollup".split(), cwd=js_dir, check=True)
+                subprocess.run(f"{npm} install react".split(), cwd=js_dir, check=True)
+                subprocess.run(f"{npm} install react-dom".split(), cwd=js_dir, check=True)
+
                 for args in (f"{npm} install", f"{npm} run build"):
                     args_list = args.split()
                     log.info(f"> {list2cmdline(args_list)}")

src/js/package.json

@@ -12,12 +12,14 @@
   },
   "devDependencies": {
     "prettier": "^2.2.1",
-    "rollup": "^2.35.1",
+    "rollup": "^2.56.3",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-replace": "^2.2.0"
   },
   "dependencies": {
-    "idom-client-react": "^0.33.0"
+    "idom-client-react": "^0.33.0",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2"
   }
 }