Add git hash to charm_version while charm versioning spec is pending …

…review

tox.ini

@@ -23,12 +23,20 @@ allowlist_externals =
     {[testenv]allowlist_externals}
     charmcraft
     mv
+    cp
 commands_pre =
     poetry export --only main,charm-libs --output requirements.txt
+    # Workaround to add unique identifier (git hash) to charm version while specification
+    # DA053 - Charm versioning
+    # (https://docs.google.com/document/d/1Jv1jhWLl8ejK3iJn7Q3VbCIM9GIhp8926bgXpdtx-Sg/edit?pli=1)
+    # is pending review.
+    cp charm_version charm_version.backup
+    python -c 'import pathlib; import subprocess; file = pathlib.Path("charm_version"); version = file.read_text().strip(); git_hash=subprocess.run(["git", "describe", "--always"], capture_output=True, check=True, encoding="utf-8").stdout; file.write_text(f"{version}+{git_hash}")'
 commands =
     build: charmcraft pack {posargs}
 commands_post =
     mv requirements.txt requirements-last-build.txt
+    mv charm_version.backup charm_version
 
 [testenv:format]
 description = Apply coding style standards to code