[CI] Adds autoflake, pytest, and basic format/lint/codec pre-commit hooks

Author: parthacharyaaaaa

.pre-commit-config.yaml

@@ -3,4 +3,28 @@ repos:
     rev: 26.1.0
     hooks:
       - id: black
-    
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+      - id: check-toml
+      - id: check-yaml
+      - id: fix-byte-order-marker
+
+  - repo: local
+    hooks:
+      - id: autoflake.bash
+        name: autoflake
+        entry: .pre-commit/autoflake_runner.bash
+        language: script
+        description: Run autoflake against source
+
+  - repo: local
+    hooks:
+      - id: pytest_runner
+        name: pytest
+        language: script
+        description: Run pytest against source
+        entry: .pre-commit/pytest_runner.bash

.pre-commit/autoflake_runner.bash

@@ -0,0 +1,11 @@
+#! /usr/bin/bash
+
+set -euo pipefail
+
+files=$(git diff --cached --name-only -z --diff-filter=ACM -- '*.py')
+
+if [ -z "$files" ]; then
+    exit 0
+fi
+
+autoflake --check --remove-all-unused-imports --ignore-init-modules-imports --verbose

.pre-commit/pytest_runner.bash

@@ -0,0 +1,24 @@
+#! /usr/bin/bash
+
+set -euo pipefail
+
+REPO_ROOT=$(git rev-parse --show-toplevel)
+cd "$REPO_ROOT"
+
+if [ ! command -v pytest > /dev/null ]; then
+    echo "pytest could not be resolved"
+    exit 1
+fi
+
+if [ ! -d "tests" ]; then
+    echo "No 'tests' directory found at TLD for pytest to run against"
+    exit 1
+fi
+
+files=$(git diff --cached --name-only -z --diff-filter=ACM -- '*.py')
+
+if [ -z "$files" ]; then
+    exit 0
+fi
+
+pytest -vv --tb=short