Git Pre-Commit hook with SwiftLInt

pre-commit

#!/bin/bash

SWIFT_LINT=./Pods/SwiftLint/swiftlint

if [[ -e "${SWIFT_LINT}" ]]; then
    count=0
    for file_path in $(git ls-files -m --exclude-from=.gitignore | grep ".swift$"); do
        export SCRIPT_INPUT_FILE_$count=$file_path
        count=$((count + 1))
    done

    # Export files for swiftlint --use-script-input-files
    for file_path in $(git diff --name-only --cached | grep ".swift$"); do
        export SCRIPT_INPUT_FILE_$count=$file_path
        count=$((count + 1))
    done
    export SCRIPT_INPUT_FILE_COUNT=$count

    if [ "$count" -eq 0 ]; then
      echo "No files to lint!"
      exit 0
    fi

    echo "Found $count lintable files! Linting now.."
    $SWIFT_LINT --use-script-input-files --strict --config .swiftlint.yml
    RESULT=$? # swiftlint exit value is number of errors

    if [ $RESULT -eq 0 ]; then
      echo "🎉  Well done. No violation."
    fi
    exit $RESULT
else
    echo "⚠️  WARNING: SwiftLint not found in $SWIFT_LINT"
    echo "⚠️  You might want to edit .git/hooks/pre-commit to locate your swiftlint"
    exit 0
fi