New pip_src_remaps config

src/rez/config.py

@@ -309,6 +309,7 @@ def _parse_env_var(self, value):
     "alias_styles":                                 OptionalStrList,
     "memcached_uri":                                OptionalStrList,
     "pip_extra_args":                               OptionalStrList,
+    "pip_src_remaps":                               OptionalDict,
     "local_packages_path":                          Str,
     "release_packages_path":                        Str,
     "dot_image_format":                             Str,

src/rez/rezconfig.py

@@ -704,6 +704,26 @@
 # https://pip.pypa.io/en/stable/reference/pip_install/#options
 pip_extra_args = []
 
+# Substitutions for rez.sub when relative/unknown paths are encountered for a
+# pip package distribution manifest.
+pip_src_remaps = {
+    # In manifest:       ../../bin/*
+    # pip installed to:  ./bin/*
+    # rez destination:   ./bin/*
+    r'^{pardir}{sep}{pardir}{sep}bin{sep}(.*)': [
+        r'bin\1',  # Copy from pip installed target...
+        r'bin\1',  # ...to destination in rez package
+    ],
+
+    # In manifest:       ../../lib/python/*
+    # pip installed to:  ./*
+    # rez destination:   ./python/*
+    r'^{pardir}{sep}{pardir}{sep}lib{sep}python{sep}(.*)': [
+        r'\1',             # Copy from pip installed target...
+        r'python{sep}\1',  # ...to destination in rez package
+    ],
+}
+
 
 ###############################################################################
 # Rez-1 Compatibility