Git Pre-Commit hook with SwiftLInt

pre-commit hook for Swiftlint

#!/bin/bash

if [ "$SKIP_SWIFTLINT" = "true" ]; then
    exit 0
fi

if which swiftlint >/dev/null; then
    if [ "$1" = "buildphase" ]; then
        swiftlint lint
    elif [ "$1" = "postcommit" ]; then
        count=0
        swArgs="--use-script-input-files"

        # Find changed files
        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

        # Find staged files
        for file_path in "$(git diff --diff-filter=d --name-only --cached | grep ".swift$")"; do
            export SCRIPT_INPUT_FILE_$count="$file_path"
            count=$((count + 1))
        done

        # Make the count avilable as global variable #####
        export SCRIPT_INPUT_FILE_COUNT=$count

        # Lint files or exit if no files found for lintint #####
        if [ "$count" -ne 0 ]; then
            echo "Linting and auto-correcting files before commit..."
            swiftlint lint $swArgs && swiftlint autocorrect $swArgs # autocorrects before commit
        else
            # echo "No files to lint!"
            exit 0
        fi
    else
        echo "Please provide a mode: buildphase or postcommit"
        exit 1
    fi

    RESULT=$?

    if [ $RESULT -ne 0 ]; then
        echo ""
        echo "Violation found of the type ERROR! Must fix before commit!"
    fi
    
    exit $RESULT
else
    echo "warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint"
fi