#165: Add skeleton linting functionality

- As per Hypermodern Python guide

.flake8

@@ -0,0 +1,9 @@
+# .flake8
+[flake8]
+select = B,B9BLK,C,E,F,I,S,W
+ignore = E203,W503,E501
+max-complexity = 10
+max-line-length = 80
+application-import-names = common,src,test,util
+import-order-style = google
+per-file-ignores = test/*:S101

.gitignore

@@ -4,3 +4,4 @@ venv/
 logs.log
 config.json
 .vscode/
+.nox/

dev-requirements.in

@@ -1,3 +1,5 @@
 pip-tools == 5.3.1
 Faker == 2.0.2
-black == 19.10b0
+black == 19.10b0
+nox==2020.8.22
+flake8==3.8.4

dev-requirements.txt

@@ -4,19 +4,33 @@
 #
 #    pip-compile dev-requirements.in
 #
-appdirs==1.4.4            # via black
+appdirs==1.4.4            # via black, virtualenv
+argcomplete==1.12.1       # via nox
 attrs==19.3.0             # via black
 black==19.10b0            # via -r dev-requirements.in
 click==7.1.2              # via black, pip-tools
+colorlog==4.4.0           # via nox
+distlib==0.3.1            # via virtualenv
 faker==2.0.2              # via -r dev-requirements.in
+filelock==3.0.12          # via virtualenv
+flake8==3.8.4             # via -r dev-requirements.in
+importlib-metadata==2.0.0  # via argcomplete, flake8, nox, virtualenv
+importlib-resources==3.2.1  # via virtualenv
+mccabe==0.6.1             # via flake8
+nox==2020.8.22            # via -r dev-requirements.in
 pathspec==0.8.0           # via black
 pip-tools==5.3.1          # via -r dev-requirements.in
+py==1.9.0                 # via nox
+pycodestyle==2.6.0        # via flake8
+pyflakes==2.2.0           # via flake8
 python-dateutil==2.8.0    # via faker
 regex==2020.7.14          # via black
-six==1.12.0               # via faker, pip-tools, python-dateutil
+six==1.12.0               # via faker, pip-tools, python-dateutil, virtualenv
 text-unidecode==1.3       # via faker
 toml==0.10.1              # via black
 typed-ast==1.4.1          # via black
+virtualenv==20.1.0        # via nox
+zipp==3.4.0               # via importlib-metadata, importlib-resources
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

noxfile.py

@@ -0,0 +1,29 @@
+import nox
+
+# Separating Black away from the rest of the sessions
+nox.options.sessions = "lint"
+code_locations = "common", "src", "test", "util", "noxfile.py"
+
+
+@nox.session(python="3.6")
+def format(session):
+    args = session.posargs or code_locations
+    session.run("black", *args, external=True)
+
+
+@nox.session(python="3.6")
+def lint(session):
+    args = session.posargs or code_locations
+    session.install(
+        "flake8",
+        "flake8-bandit",
+        "flake8-black",
+        "flake8-bugbear",
+        "flake8-import-order",
+    )
+    session.run("flake8", *args)
+
+@nox.session(python="3.6")
+def safety(session):
+    session.install("safety")
+    session.run("safety", "check", "-r", "requirements.txt", "--full-report")