OSS config for lint checks (#2066)

Summary:
Following up on [this comment ](https://github.com/pytorch/audio/pull/2056#issuecomment-988356439) I am separating the config changes from the formatting.

cc NicolasHug  mthrok

Pull Request resolved: https://github.com/pytorch/audio/pull/2066

Reviewed By: mthrok

Differential Revision: D32990377

Pulled By: jdsgomes

fbshipit-source-id: 67a6251a51901702ad10ae43c35609a09cbf5c5c

.circleci/config.yml

@@ -112,6 +112,25 @@ jobs:
             python .circleci/regenerate.py
             git diff --exit-code || (echo ".circleci/config.yml not in sync with config.yml.in! Run .circleci/regenerate.py to update config"; exit 1)
 
+  lint_python_and_config:
+    docker:
+      - image: circleci/python:3.7
+    steps:
+      - checkout
+      - run:
+          name: Install pre-commit
+          command: pip install --user --progress-bar off pre-commit
+      - run:
+          name: Install pre-commit hooks
+          command: pre-commit install-hooks
+      - run:
+          name: Lint Python code and config files
+          command: pre-commit run --all-files || true
+      - run:
+          name: Required lint modifications
+          when: on_fail
+          command: git --no-pager diff
+
   download_third_parties_nix:
     docker:
       - image: "pytorch/torchaudio_unittest_base:manylinux"
@@ -642,6 +661,9 @@ jobs:
             pydocstyle torchaudio
 
 workflows:
+  lint:
+    jobs:
+      - lint_python_and_config
   build:
     jobs:
       - circleci_consistency

.circleci/config.yml.in

@@ -112,6 +112,25 @@ jobs:
             python .circleci/regenerate.py
             git diff --exit-code || (echo ".circleci/config.yml not in sync with config.yml.in! Run .circleci/regenerate.py to update config"; exit 1)
 
+  lint_python_and_config:
+    docker:
+      - image: circleci/python:3.7
+    steps:
+      - checkout
+      - run:
+          name: Install pre-commit
+          command: pip install --user --progress-bar off pre-commit
+      - run:
+          name: Install pre-commit hooks
+          command: pre-commit install-hooks
+      - run:
+          name: Lint Python code and config files
+          command: pre-commit run --all-files || true
+      - run:
+          name: Required lint modifications
+          when: on_fail
+          command: git --no-pager diff
+
   download_third_parties_nix:
     docker:
       - image: "pytorch/torchaudio_unittest_base:manylinux"
@@ -642,6 +661,9 @@ jobs:
             pydocstyle torchaudio
 
 workflows:
+  lint:
+    jobs:
+      - lint_python_and_config
   build:
     jobs:
       - circleci_consistency

.pre-commit-config.yaml

+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.0.1
+    hooks:
+      - id: check-docstring-first
+      - id: check-toml
+      - id: check-yaml
+        exclude: packaging/.*
+      - id: end-of-file-fixer
+
+  - repo: https://github.com/omnilib/ufmt
+    rev: v1.3.0
+    hooks:
+      - id: ufmt
+        additional_dependencies:
+          - black == 21.9b0
+          - usort == 0.6.4

pyproject.toml

+[tool.usort]
+
+first_party_detection = false
+
+[tool.black]
+
+line-length = 120
+target-version = ["py37"]
+
+[tool.ufmt]