Moving registration of external functions

idaes/__init__.py

@@ -22,6 +22,7 @@
 import os
 import copy
 import logging
+from typing import Optional, List
 
 from . import config
 from .ver import __version__  # noqa
@@ -83,6 +84,29 @@ def _handle_optional_compat_activation(
 _log.debug("'idaes' logger debug test")
 
 
+# TODO: Remove once AMPL bug is fixed
+# TODO: https://github.com/ampl/asl/issues/13
+# There appears to be a bug in the ASL which causes terminal failures
+# if you try to create multiple ASL structs with different external
+# functions in the same process. This causes pytest to crash during testing.
+# To avoid this, register all known external functions at initialization.
+def _ensure_external_functions_libs_in_env(
+    ext_funcs: List[str], var_name: str = "AMPLFUNC", sep: str = "\n"
+):
+    libraries_str = os.environ.get(var_name, "")
+    libraries = [lib for lib in libraries_str.split(sep) if lib.strip()]
+    for func_name in ext_funcs:
+        lib: Optional[str] = os.path.join(bin_directory, func_name)
+        if lib is not None and lib not in libraries:
+            libraries.append(lib)
+    os.environ[var_name] = sep.join(libraries)
+
+
+_ensure_external_functions_libs_in_env(
+    ["cubic_roots.so", "general_helmholtz_external.so", "functions.so"]
+)
+
+
 def _create_data_dir():
     """Create the IDAES directory to store data files in."""
     config.create_dir(data_directory)

idaes/core/util/scaling.py

@@ -28,9 +28,7 @@
 __author__ = "John Eslick, Tim Bartholomew, Robert Parker, Andrew Lee"
 
 import math
-import os
 import sys
-from typing import Optional, List
 
 import scipy.sparse.linalg as spla
 import scipy.linalg as la
@@ -51,35 +49,12 @@
 from pyomo.core import expr as EXPR
 from pyomo.common.numeric_types import native_types
 from pyomo.core.base.units_container import _PyomoUnit
-from pyomo.common.fileutils import find_library
 
 import idaes.logger as idaeslog
 
 _log = idaeslog.getLogger(__name__)
 
 
-# There appears to be a bug in the ASL which causes terminal failures
-# if you try to create multiple ASL structs with different external
-# functions in the same process. This causes pytest to crash during testing.
-# To avoid this, register all known external functions before we call
-# PyNumero.
-def _ensure_external_functions_libs_in_env(
-    ext_funcs: List[str], var_name: str = "AMPLFUNC", sep: str = "\n"
-):
-    libraries_str = os.environ.get(var_name, "")
-    libraries = [lib for lib in libraries_str.split(sep) if lib.strip()]
-    for func_name in ext_funcs:
-        lib: Optional[str] = find_library(func_name)
-        if lib is not None and lib not in libraries:
-            libraries.append(lib)
-    os.environ[var_name] = sep.join(libraries)
-
-
-_ensure_external_functions_libs_in_env(
-    ["cubic_roots", "general_helmholtz_external", "functions"]
-)
-
-
 def __none_left_mult(x, y):
     """PRIVATE FUNCTION, If x is None return None, else return x * y"""
     if x is not None: