fix flake8 using python_install

.gitlab-ci.yml

@@ -21,7 +21,6 @@ flake8:
     stage: templates
     variables:
         PROJECT_PATH: "tests/flake8_project"
-        PYTHON_SETUP: "pip install ${PROJECT_PATH} flake8"
     only:
         changes:
             - .gitlab-ci.yml

templates/python/code_quality/flake8/flake8.yml

@@ -5,14 +5,13 @@ include:
   - remote: 'https://api.r2devops.io/job/r/gitlab/dorianturba/r2devops_catalog/python_install@0.1.0.yaml'
 
 flake8:
-    image: python:${IMAGE_TAG}
+    extend: python_install
     stage: code_quality
     variables:
-        IMAGE_TAG: "latest"
         PROJECT_PATH: "."
         PYTHON_SETUP: "pip install ${PROJECT_PATH}[CODE_QUALITY]"
     script:
-        *python_install
+        python_install
         - flake8 ${PROJECT_PATH} -v
     only:
         changes:

templates/python/partial/python_install.yml

-.python_install: &python_install
-  - python --version  # Debug
-  - python -m venv venv --upgrade-deps || python -m venv venv  # upgrade-deps is not supported before 3.9
-  - source venv/bin/activate
-  - ${PYTHON_SETUP}
+.python_install:
+    image: python:${IMAGE_TAG}
+    variables:
+        IMAGE_TAG: "latest"
+        PROJECT_PATH: "."
+        PYTHON_SETUP: "pip install -r ${PROJECT_PATH}/requirements.txt"
+    script:
+        - python --version  # Debug
+        - python -m venv venv --upgrade-deps || python -m venv venv  # upgrade-deps is not supported before 3.9
+        - source venv/bin/activate
+        - ${PYTHON_SETUP}

tests/black_project/pyproject.toml

@@ -9,3 +9,8 @@ authors = [
     { name = "Author Name", email = "author.name@example.com" },
 ]
 description = "A description of what the package is for."
+
+[project.optional-dependencies]
+CODE_QUALITY = [
+    "flake8",
+]