Add smoketests/requirements.txt (#3701)

# Description of Changes

We have added one too many python dependencies. I'm putting them in a
shared file, which will also ease installation for devs running them
locally.

# API and ABI breaking changes

None. CI only.

# Expected complexity level and risk

1

# Testing

Existing CI still passes

---------

Co-authored-by: Zeke Foppa <bfops@users.noreply.github.com>

.github/workflows/ci.yml

@@ -109,7 +109,7 @@ jobs:
         with: { python-version: '3.12' }
         if: runner.os == 'Windows'
       - name: Install python deps
-        run: python -m pip install psycopg2-binary xmltodict
+        run: python -m pip install -r smoketests/requirements.txt
       - name: Run smoketests
         # Note: clear_database and replication only work in private
         run: python -m smoketests ${{ matrix.smoketest_args }} -x clear_database replication teams

.gitignore

@@ -226,3 +226,6 @@ new.json
 
 # Symlinked output from `nix build`
 result
+
+# Python venv directories
+venv/

smoketests/README.md

@@ -0,0 +1,11 @@
+To use the smoketests, you first need to install the dependencies:
+
+```
+python -m venv smoketests/venv
+smoketests/venv/bin/pip install -r smoketests/requirements.txt
+```
+
+Then, run the smoketests like so:
+```
+smoketests/venv/bin/python -m smoketests <args>
+```

smoketests/requirements.txt

@@ -0,0 +1,3 @@
+psycopg2-binary
+toml
+xmltodict