docker share database dependencies

Dockerfile

@@ -43,10 +43,8 @@ RUN echo "**** install build dependencies ****" &&\
     mkdir -p /etc/ihatemoney &&\
     echo "**** install pip packages ****" && \
     pip install --no-cache-dir \
-    gunicorn \
-    pymysql \
-    psycopg2 && \
-    pip install --no-cache-dir -e /src && \
+    gunicorn && \
+    pip install --no-cache-dir -e /src[database] && \
     echo "**** create user abc:abc ****" && \
     useradd -u 1000 -U -d /src abc && \
     echo "**** cleanup ****" && \

setup.cfg

@@ -45,6 +45,10 @@ install_requires =
     python-dateutil
 
 [options.extras_require]
+database =
+    psycopg2-binary>=2.9,<3
+    PyMySQL>=0.9,<1.1
+
 dev =
     black>=19.10b0 ; python_version >= '3.6'
     flake8>=3.7.9
@@ -53,8 +57,6 @@ dev =
     pytest>=5.4.1
     tox>=3.14.6
     zest.releaser>=6.20.1
-    psycopg2-binary>=2.9,<3
-    PyMySQL>=0.9,<1.1
 
 doc =
     Sphinx==4.3.0

tox.ini

@@ -10,7 +10,7 @@ commands =
     py.test --pyargs ihatemoney.tests
 
 deps =
-    -e.[dev]
+    -e.[database,dev]
 
 # To be sure we are importing ihatemoney pkg from pip-installed version
 changedir = /tmp