#165: Allow dependencies to be installed according to Poetry's depen…

…dencies

- This will help keep consistent versions of flake8 etc being installed between developers, to prevent incosistent linting/safety outputs

noxfile.py

@@ -1,31 +1,59 @@
 import nox
+import tempfile
 
 # Separating Black away from the rest of the sessions
-nox.options.sessions = "lint"
-code_locations = "common", "src", "test", "util", "noxfile.py"
+nox.options.sessions = "lint", "safety"
+code_locations = "datagateway_api", "test", "util", "noxfile.py"
 
 
-@nox.session(python="3.6")
+def install_with_constraints(session, *args, **kwargs):
+    with tempfile.NamedTemporaryFile() as requirements:
+        session.run(
+            "poetry",
+            "export",
+            "--dev",
+            "--format=requirements.txt",
+            f"--output={requirements.name}",
+            external=True,
+        )
+        session.install(f"--constraint={requirements.name}", *args, **kwargs)
+
+
+@nox.session(python=["3.6", "3.7", "3.8", "3.9"], reuse_venv=True)
 def format(session):
     args = session.posargs or code_locations
-    session.install("black")
+    install_with_constraints(session, "black")
     session.run("black", *args, external=True)
 
 
-@nox.session(python="3.6")
+@nox.session(python="3.6", reuse_venv=True)
 def lint(session):
     args = session.posargs or code_locations
-    session.install(
+    install_with_constraints(
+        session,
         "flake8",
         "flake8-bandit",
         "flake8-black",
         "flake8-bugbear",
         "flake8-import-order",
+        "flake8-builtins",
+        #"flake8-logging-format",    # TODO - Add this to env
+        #"flake8-commas",
     )
     session.run("flake8", *args)
 
 
-@nox.session(python="3.6")
+@nox.session(python="3.6", reuse_venv=True)
 def safety(session):
-    session.install("safety")
-    session.run("safety", "check", "-r", "requirements.txt", "--full-report")
+    install_with_constraints(session, "safety")
+    with tempfile.NamedTemporaryFile() as requirements:
+        session.run(
+            "poetry",
+            "export",
+            "--dev",
+            "--format=requirements.txt",
+            "--without-hashes",
+            f"--output={requirements.name}",
+            external=True,
+        )
+        session.run("safety", "check", f"--file={requirements.name}", "--full-report")