pre-commit git hook for iOS projects

pre-commit

#----------------------------------------------------------------
# PREVENT YOUR CODEBASE GETTING SPOILED BY DEVELOPERS
# - YOU NEED TO THIS pre-commit file (without any extension) 
#   at ".git/hooks/" folder.
# - THEN TRY TO PUT WRONG STYLED/LINT CODE
#----------------------------------------------------------------

branch="$(git rev-parse --abbrev-ref HEAD)"

#----------------------------------------------------------------
# RESTRICT BRANCHES FROM DIRECT PUSH
#----------------------------------------------------------------
if [ "$branch" = "master" ] || [ "$branch" = "Development" ]; then
  echo "You can't commit directly to $branch"
  exit 1
fi

#----------------------------------------------------------------
# RUN SWIFTLINT  
#----------------------------------------------------------------

# Run SwiftLint
START_DATE=$(date +"%s")

# This line is required to make sure it works on Apple Silicon.
if [[ "$(uname -m)" == arm64 ]]; then
    export PATH="/opt/homebrew/bin:$PATH"
fi

# Variables
SWIFT_LINT=/usr/local/bin/swiftlint
hasErrors=0

# Run SwiftLint for given filename
run_swiftlint() {
    local filename="${1}"
    if [[ "${filename##*.}" == "swift" ]]; then
        ${SWIFT_LINT} lint --path "${filename}"
        if [[ $? != 0 ]]; then
            hasErrors=1
        fi
    fi
}

if [[ -e "${SWIFT_LINT}" ]]; then
    echo "SwiftLint version: $(${SWIFT_LINT} version)"
    # Run for staged files
    for filename in $(git diff --diff-filter=d --name-only);
    do
        run_swiftlint "${filename}";
    done

    # Run for unstaged files
    for filename in $(git diff --cached --diff-filter=d --name-only);
    do
        run_swiftlint "${filename}";
    done
    
    # Run for added files
    for filename in $(git ls-files --others --exclude-standard);
    do
        run_swiftlint "${filename}";
    done
else
    echo "${SWIFT_LINT} is not installed."
    exit 0
fi

END_DATE=$(date +"%s")
DIFF=$(($END_DATE - $START_DATE))

echo "SwiftLint took $(($DIFF / 60)) minutes and $(($DIFF % 60)) seconds to complete."

# Show error message if hasErrors is true and exit with an error status
if [[ $hasErrors -ne 0 ]]; then
    echo "SwiftLint checks failed. Please fix the above issues."
    exit 1
fi

exit 0

#----------------------------------------------------------------
# BUILD XCODE PROJECT & VALIDATE 
#----------------------------------------------------------------
xcodebuild -quiet build -workspace <YOUR WORKSPACE>.xcworkspace -scheme <YOUR PROJECT SCHEME>
if test $? -eq 0
    then echo "Successful build"
else
    echo "Your XCode build is Failed, for scheme "
    exit 1
fi