Single source version from pyproject.toml (#456)

* Single source version from pyproject.toml

* Remove single-source version logic and dependencies for python<3.8

Author: ronnie-llamado

poetry.lock

@@ -1,3 +1,6 @@
+import importlib.metadata
+
+# <AUTOGEN_INIT>
 from electionguard import auxiliary
 from electionguard import ballot
 from electionguard import ballot_box
@@ -688,3 +691,11 @@
     "verify_election_partial_key_challenge",
     "verify_polynomial_coordinate",
 ]
+
+# </AUTOGEN_INIT>
+
+# single source version from pyproject.toml
+try:
+    __version__ = importlib.metadata.version(__package__.split("_", maxsplit=1)[0])
+except importlib.metadata.PackageNotFoundError:
+    __version__ = "0.0.0"

src/electionguard/__init__.py

@@ -1,3 +1,6 @@
+import importlib.metadata
+
+# <AUTOGEN_INIT>
 from electionguard_tools import factories
 from electionguard_tools import helpers
 from electionguard_tools import scripts
@@ -192,3 +195,11 @@
     "to_raw",
     "two_letter_codes",
 ]
+
+# </AUTOGEN_INIT>
+
+# single source version from pyproject.toml
+try:
+    __version__ = importlib.metadata.version(__package__.split("_", maxsplit=1)[0])
+except importlib.metadata.PackageNotFoundError:
+    __version__ = "0.0.0"

src/electionguard_tools/__init__.py

@@ -1,3 +1,6 @@
+import importlib.metadata
+
+# <AUTOGEN_INIT>
 from electionguard_verify import verify
 
 from electionguard_verify.verify import (
@@ -6,3 +9,11 @@
 )
 
 __all__ = ["Verification", "verify", "verify_ballot"]
+
+# </AUTOGEN_INIT>
+
+# single source version from pyproject.toml
+try:
+    __version__ = importlib.metadata.version(__package__.split("_", maxsplit=1)[0])
+except importlib.metadata.PackageNotFoundError:
+    __version__ = "0.0.0"