Add black formatting

.travis.yml

@@ -2,7 +2,6 @@
 dist: xenial
 language: python
 python:
-  - 3.5
   - 3.6
   - 3.7
 

cookiecutter.json

@@ -6,6 +6,6 @@
 	"app_name": "{{cookiecutter.project_name.lower().replace('-', '_').replace(' ', '_')}}",
 	"project_short_description": "A flasky app.",
 	"use_pipenv": ["no", "yes"],
-	"python_version": ["3.7", "3.6", "3.5"],
+	"python_version": ["3.7", "3.6"],
 	"node_version": ["12", "10", "8"]
 }

tasks.py

@@ -41,9 +41,12 @@ def clean(ctx):
         print('App directory does not exist. Skipping.')
 
 
-def _run_flask_command(ctx, command):
+def _run_flask_command(ctx, command, *args):
     os.chdir(COOKIE)
-    ctx.run('flask {0}'.format(command), echo=True)
+    flask_command = 'flask {0}'.format(command)
+    if args:
+        flask_command = '{0} {1}'.format(flask_command, ' '.join(args))
+    ctx.run(flask_command, echo=True)
 
 
 @task(pre=[clean, build])
@@ -55,9 +58,7 @@ def test(ctx):
     os.chdir(COOKIE)
     shutil.copyfile(os.path.join(COOKIE, '.env.example'),
                     os.path.join(COOKIE, '.env'))
-    os.environ["FLASK_ENV"] = "production"
-    os.environ["FLASK_DEBUG"] = "0"
-    _run_flask_command(ctx, 'lint')
+    _run_flask_command(ctx, 'lint', '--check')
     _run_flask_command(ctx, 'test')
 
 

{{cookiecutter.app_name}}/.isort.cfg

-[settings]
-line_length=120

{{cookiecutter.app_name}}/.travis.yml

 # Config file for automatic testing at travis-ci.org
+dist: xenial
 language: python
 env:
 - FLASK_APP=autoapp.py FLASK_DEBUG=1
 python:
-  - 2.7
-  - 3.4
-  - 3.5
   - 3.6
   - 3.7
 install:
@@ -16,5 +14,5 @@ install:
 before_script:
   - npm run lint
   - npm run build
-  - flask lint
+  - flask lint --check
 script: flask test

{{cookiecutter.app_name}}/Pipfile

@@ -53,12 +53,11 @@ factory-boy = "==2.12.*"
 pdbpp = "==0.10.0"
 
 # Lint and code style
+black = "==19.3b0"
 flake8 = "==3.7.7"
 flake8-blind-except = "==0.1.1"
 flake8-debugger = "==3.1.0"
 flake8-docstrings = "==1.3.0"
 flake8-isort = "==2.7.0"
-flake8-quotes = "==2.0.1"
 isort = "==4.3.20"
 pep8-naming = "==0.8.2"
-

{{cookiecutter.app_name}}/README.rst

@@ -57,13 +57,18 @@ To open the interactive shell, run ::
 By default, you will have access to the flask ``app``.
 
 
-Running Tests
--------------
+Running Tests/Linter
+--------------------
 
 To run all tests, run ::
 
     flask test
 
+To run the linter, run ::
+
+    flask lint
+
+The ``lint`` command will attempt to fix any linting/style errors in the code. If you only want to know if the code will pass CI and do not wish for the linter to make changes, add the ``--check`` argument.
 
 Migrations
 ----------

{{cookiecutter.app_name}}/requirements/dev.txt

@@ -8,11 +8,11 @@ factory-boy==2.11.1
 pdbpp==0.10.0
 
 # Lint and code style
-flake8==3.5.0
+black==19.3b0
+flake8==3.7.7
 flake8-blind-except==0.1.1
 flake8-debugger==3.1.0
 flake8-docstrings==1.3.0
 flake8-isort==2.5
-flake8-quotes==1.0.0
 isort==4.3.4
 pep8-naming==0.7.0

{{cookiecutter.app_name}}/setup.cfg

 [flake8]
-ignore = D401
+ignore = D401,D202,E226,E302,E41
 max-line-length=120
+exclude = migrations/*
+max-complexity = 10
+
+[isort]
+line_length=88
+multi_line_output=3
+skip=migrations/*
+include_trailing_comma=true

{{cookiecutter.app_name}}/{{cookiecutter.app_name}}/commands.py

@@ -23,11 +23,12 @@ def test():
 
 
 @click.command()
-@click.option('-f', '--fix-imports', default=False, is_flag=True,
+@click.option('-f', '--fix-imports', default=True, is_flag=True,
               help='Fix imports using isort, before linting')
-def lint(fix_imports):
-    """Lint and check code style with flake8 and isort."""
-    skip = ['node_modules', 'requirements']
+@click.option('-c', '--check', default=False, is_flag=True, help="Don't make any changes to files, just confirm they are formatted correctly")
+def lint(fix_imports, check):
+    """Lint and check code style with black, flake8 and isort."""
+    skip = ['node_modules', 'requirements', 'migrations']
     root_files = glob('*.py')
     root_directories = [
         name for name in next(os.walk('.'))[1] if not name.startswith('.')]
@@ -42,8 +43,14 @@ def lint(fix_imports):
         if rv != 0:
             exit(rv)
 
+    isort_args = ["-rc"]
+    black_args = []
+    if check:
+        isort_args.append('-c')
+        black_args.append('--check')
     if fix_imports:
-        execute_tool('Fixing import order', 'isort', '-rc')
+        execute_tool('Fixing import order', 'isort', *isort_args)
+    execute_tool('Formatting style', 'black', *black_args)
     execute_tool('Checking code style', 'flake8')