Add warning if workspaces does not contain public package

Author: fcollonval

jupyter_releaser/npm.py

@@ -49,6 +49,8 @@ def build_dist(package, dist_dir):
             paths.append(str(osp.abspath(path)).replace(os.sep, "/"))
         if paths:
             util.run(f"npm pack {' '.join(paths)}", cwd=dest, quiet=True)
+        else:
+            util.log("The NPM package defines 'workspaces' that does not contain any public package; this may be a mistake.")
 
 
 def extract_dist(dist_dir, target):