Shebang magic and dump plugin

charmcraft.yaml

@@ -26,6 +26,10 @@ parts:
       - rustc
       - cargo
       - pkg-config
-    charm-binary-python-packages:
-      - psycopg2-binary
-      - psycopg-binary
+      - libpq-dev
+  libpq:
+    plugin: dump
+    source: http://archive.ubuntu.com/ubuntu/pool/main/p/postgresql-14/libpq5_14.10-0ubuntu0.22.04.1_amd64.deb
+    source-type: deb
+    organize:
+      'usr/lib/*-linux-gnu/libpq.so*': binlibs/

pyproject.toml

@@ -22,8 +22,8 @@ poetry-core = "^1.8.1"
 lightkube = "^0.15.0"
 lightkube-models = "^1.29.0.6"
 pydantic = "^1.10.13"
-psycopg2-binary = "^2.9.9"
-psycopg = {extras = ["binary"], version = "^3.1.17"}
+psycopg2 = "^2.9.9"
+psycopg = {extras = ["c"], version = "^3.1.17"}
 
 [tool.poetry.group.charm-libs.dependencies]
 # data_platform_libs/v0/data_interfaces.py
@@ -58,6 +58,7 @@ pytest = "^7.4.4"
 pytest-asyncio = "*"
 jinja2 = "^3.1.2"
 psycopg2-binary = "^2.9.9"
+lightkube = "*"
 
 [tool.poetry.group.integration]
 optional = true

src/charm.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env -S LD_LIBRARY_PATH=binlibs python3
 # Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 

tox.ini

@@ -69,7 +69,7 @@ commands =
 [testenv:unit]
 description = Run unit tests
 commands_pre =
-    poetry install --only main,charm-libs,unit --no-root
+    poetry install --only charm-libs,unit --no-root
 commands =
     poetry run coverage run --source={[vars]src_path},{[vars]lib_path}  \
         -m pytest -v --tb native -s {posargs} {[vars]tests_path}/unit