Support missing url field (#110)

Author: trungleduc

empack/filter_env.py

@@ -73,7 +73,8 @@ def iterate_env_pkg_meta(env_prefix):
 
 
 def write_minimal_conda_meta(pkg_meta, env_prefix):
-    content = {k: pkg_meta[k] for k in ["name", "version", "build", "build_number", "url"]}
+    content = {k: pkg_meta[k] for k in ["name", "version", "build", "build_number"]}
+    content["url"] = pkg_meta.get("url", None)
     conda_meta_dir = Path(env_prefix) / "conda-meta"
     conda_meta_dir.mkdir(parents=True, exist_ok=True)
 

empack/pack.py

@@ -209,7 +209,7 @@ def pack_env(
 
             package_url = None
             if package_url_factory:
-                package_url = package_url_factory(pkg_dict, source_url=pkg_meta["url"])
+                package_url = package_url_factory(pkg_dict, source_url=pkg_meta.get("url", None))
             if package_url is not None:
                 pkg_dict["url"] = package_url
             packages_info.append(pkg_dict)