Git precommit hook deigned to run Gradle based static analysis checks for Ktlint and Detekt. Crated for Android Kotlin projects and is compatable with Windows/Mac. Requires Detekt and Ktlint Gradle plugins configured and installed on the project.

precommit

#!/bin/sh
echo "Running git pre-commit hook..."

echo "Checking if any kotlin files have changed..."

# Determine the platform
UNAME=$(uname)


# Exit early if no Kotlin files have changed.
if [ "$UNAME" = "Darwin" ]; then
    # Mac specific code
    FILES=$(git diff --name-only --cached --relative | grep '\.kt[s"]\?$')
    [ -z "$FILES" ] && echo "No Kotlin files have changed, skipping pre-commit checks." && exit 0
else
    # Windows specific code
    diff_output=$(git diff --name-only --cached --relative)
    for line in $diff_output; do
        if [[ $line =~ \.kt$ || $line =~ \.kts$ ]]; then
            continue
        fi

        echo "No Kotlin files have changed, skipping pre-commit checks."
        exit 0
    done
fi

# https://github.com/pinterest/ktlint pre-commit hook
echo "Running ktlint check..."

OUTPUT="/tmp/ktlint-$(date + %s)"
./gradlew ktlintCheck --continue >"$OUTPUT"
EXIT_CODE=$?
if [ $EXIT_CODE -ne 0 ]; then
  cat "$OUTPUT"
  rm "$OUTPUT"
  echo "***********************************************"
  echo "                 ktlint failed                 "
  echo " Please fix the above issues before committing "
  echo "***********************************************"
  exit $EXIT_CODE
fi

# https://detekt.github.io/detekt/git-pre-commit-hook.html pre-commit hook
echo "Running detekt check..."

OUTPUT="/tmp/detekt-$(date + %s)"
./gradlew detekt > "$OUTPUT"
EXIT_CODE=$?
if [ $EXIT_CODE -ne 0 ]; then
  cat "$OUTPUT"
  rm "$OUTPUT"
  echo "***********************************************"
  echo "                 Detekt failed                 "
  echo " Please fix the above issues before committing "
  echo "***********************************************"
  exit $EXIT_CODE
fi
rm "$OUTPUT"