feat: add pkg extras for postgres, mysql; update install doc

no longer requires psycopg2 by default; use postgres extra

docs/narr/install.rst

@@ -8,22 +8,34 @@ Prerequisites
 -------------
 
 You'll need Python >= 3.8, and a database.  See also
-:doc:`wuttjamaican:narr/install/prereqs` in the Wutta docs.
+the Wutta docs:
+
+* :doc:`wuttjamaican:narr/install/prereqs`
+* :ref:`wuttjamaican:create-appdb`
+
+But for convenience here is a cheat sheet:
+
+*PostgreSQL*
 
 .. code-block:: sh
 
    sudo apt install build-essential python3-dev python3-venv postgresql libpq-dev
 
-As for the database, see also :ref:`wuttjamaican:create-appdb` but FYI
-these docs will assume a PostgreSQL setup with ``sideshow`` as the DB
-name (and PG username).
-
-.. code-block:: sh
-
    sudo -u postgres createuser sideshow
    sudo -u postgres psql -c "ALTER USER sideshow PASSWORD 'mypassword'"
    sudo -u postgres createdb -O sideshow sideshow
 
+*MySQL*
+
+.. code-block:: sh
+
+   sudo apt install build-essential python3-dev python3-venv default-mysql-server
+
+   sudo mysql -e "CREATE USER sideshow@localhost"
+   sudo mysql -e "ALTER USER sideshow@localhost  IDENTIFIED BY 'mypassword'"
+   sudo mysqladmin create sideshow
+   sudo mysql -e "GRANT ALL ON sideshow.* TO sideshow@localhost"
+
 
 Virtual Environment
 -------------------
@@ -49,12 +61,16 @@ the folder ownership should be changed to whatever you need:
 Install Sideshow
 ----------------
 
-First install the Sideshow package to your virtual environment:
+First install the Sideshow package to your virtual environment.  Note
+that you must specify which DB backend to use:
 
 .. code-block:: sh
 
-   cd /srv/envs/sideshow
-   bin/pip install Sideshow
+   # postgres
+   bin/pip install Sideshow[postgres]
+
+   # mysql
+   bin/pip install Sideshow[mysql]
 
 Then you can run the Sideshow installer:
 

pyproject.toml

@@ -32,11 +32,12 @@ classifiers = [
 license = {text = "GNU General Public License v3+"}
 requires-python = ">= 3.8"
 dependencies = [
-        "psycopg2",
         "WuttaWeb>=0.20.5",
 ]
 
 [project.optional-dependencies]
+postgres = ["psycopg2"]
+mysql = ["mysql-connector-python"]
 docs = ["Sphinx", "furo", "sphinxcontrib-programoutput", "enum-tools[sphinx]"]
 tests = ["pytest-cov", "tox"]