pre-push SwiftLint git hook

#!/bin/bash

# Define colors & styles for outputs
# ----------------------------------

red='\033[1;31m'
green='\033[32m'
bold='\033[1m'
italic='\033[2;3m'
reset='\033[0m'


# Define early exit function
# --------------------------

abort() {
    echo -e "${italic}Use ${reset}${bold}'git push --no-verify'${reset}${italic} to bypass linter${reset}"
    exit 1
}


# Check for uncommited changes
# ----------------------------

if [[ $(git diff) ]]; then 
    echo -e "${red}Error${reset}: There are some ${bold}unstaged${reset} changes."
    abort
elif [[ $(git diff --cached) ]]; then 
    echo -e "${red}Error${reset}: There are some ${bold}uncommited${reset} changes."
    abort
fi


# Correct changed .swift files if there's any
# -------------------------------------------

# TODO: make this work without echoing error
# changed_files=$((git diff @{upstream} --name-only || git diff origin/dev HEAD --name-only) | grep -Ev 'Pods/' | grep .swift$)

# Let's assume we have a origin/dev branch
git fetch origin
changed_files=$(git diff origin/dev HEAD --name-only | grep -Ev 'Pods/' | grep .swift$)
Pods/SwiftLint/swiftlint autocorrect [$changed_files] --quiet


# Print corrected files
# ---------------------

corrected_files=$(git diff --name-only)
if [ -n "$corrected_files" ]; then 
    echo -e "SwiftLint ${green}autocorrected${reset} the following files:\n${italic}${corrected_files}${reset}"
    git commit -am "SwiftLint autocorrection - pre-push hook"
    echo -e "Please ${bold}push${reset} again."
    abort
fi

exit 0