Pre-push hook for checking swift and bash files using swiftlint and shellcheck

gistfile1.txt

#! /usr/bin/env bash

# set -o xtrace
set -o errexit
set -o nounset
set -o pipefail

function error() {

    local -r TAG="$1"
    local -r ERROR="$2"
    local -r BOC="\033[0;31m"
    local -r EOC="\033[m"
    local -r PROMPT="${BOC}[${TAG}]${EOC} %s\n"
    printf "$PROMPT" "$ERROR" >&2
}

function main() {
   
    local -r REMOTE="$1"
    local -r BRANCH="$(git rev-parse --abbrev-ref HEAD)"
    local SUCCESS=0
    
    if [[ -e "/usr/local/bin/swiftlint" ]]; then
        local CONFIG_FLAG=""
        local CONFIG_FILE=".swiftlint.yml"
        
        if [[ -f "$CONFIG_FILE" ]]; then
            CONFIG_FLAG="--config $CONFIG_FILE"
        fi
        
        # Use swiftlint to check modified swift files
        for SWIFT_FILE in $(git diff --stat $REMOTE/$BRANCH | grep --color=none ".swift" | cut -d' ' -f2); do
            if [[ -n "$SWIFT_FILE" ]]; then
                if ! cat "$SWIFT_FILE" | swiftlint lint --strict --quiet --use-stdin $CONFIG_FLAG &> /dev/null; then
                    error "swiflint" "Lint errors found in $SWIFT_FILE"
                    swiftlint autocorrect --path "$SWIFT_FILE" --format --quiet $CONFIG_FLAG 
                    SUCCESS=1
                fi 
            fi
        done
    fi 

    if [[ -e "/usr/local/bin/shellcheck" ]]; then
        # Use shellcheck to check modified bash files
        for BASH_FILE in $(git diff --stat $REMOTE/$BRANCH | grep --color=none ".sh" | cut -d' ' -f2); do
            if [[ -n "$BASH_FILE" ]]; then
                if ! shellcheck "$BASH_FILE" &> /dev/null; then
                    error "shellcheck" "Lint errors found in $BASH_FILE"
                    SUCCESS=1
                fi
            fi
        done
    fi

    exit "$SUCCESS"
}

main "$@"