build: use requirements.txt files

Author: chaimleib

.github/workflows/tests.yml

@@ -47,8 +47,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pytest pytest-cov sortedcontainers
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -r requirements/pytest.txt
     - name: Test with pytest
       run: |
         pytest
@@ -66,7 +65,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8
+        pip install -r requirements/flake8.txt
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

requirements.txt

@@ -0,0 +1 @@
+-r requirements/common.txt

requirements/common.txt

@@ -0,0 +1 @@
+sortedcontainers==2.4.0

requirements/flake8.txt

@@ -0,0 +1 @@
+flake8

requirements/pytest.txt

@@ -0,0 +1,3 @@
+-r common.txt
+pytest
+pytest-cov