CI tagging script

ci_tag.zsh

#color utilities
Y="\033[1;33m"
R="\033[0;31m"
G="\033[0;32m"
B="\033[0;34m"
NC="\033[0m"


# handy functions
usage() { echo "Usage: ci_tag [-t <tf1|tf2|release>] [-m <release note>]" 1>&2;}
error() { echo "${R}$1${NC}";}
die() { kill -INT $$ ;}

ask() {
    local prompt default REPLY
    while true; do
        if [ "${2:-}" = "Y" ]; then
            prompt="Y/n"
            default=Y
        elif [ "${2:-}" = "N" ]; then
            prompt="y/N"
            default=N
        else
            prompt="y/n"
            default=
        fi
        # Ask the question (not using "read -p" as it uses stderr not stdout)
        echo -n "$1 [$prompt]:"
        # Read the answer (use /dev/tty in case stdin is redirected from somewhere else)
        read REPLY </dev/tty
        # Default?
        if [ -z "$REPLY" ]; then
            REPLY=$default
        fi
        # Check if the reply is valid
        case "$REPLY" in
            Y*|y*) return 0 ;;
            N*|n*) return 1 ;;
        esac
    done
}

#check that there are args
if [[ $# -eq 0 ]]; then
    error "No arguments provided" && usage && die;
fi

while getopts ":t:m:h" o; do
    case "${o}" in
        t) t=${OPTARG};;
        m) m=${OPTARG};;
        *) error "you must provide options for -t and -m" && usage && die;;
    esac
done

# set prefix
case $t in
    tf1) prefix="TF1" && target="testflight 1";;
    tf2) prefix="TF2" && target="testflight 2";;
    release) prefix="R" && target="production";;
    *) error "Only <tf1|tf2|release> are valid options for -t" && usage && die;;
esac

# check for release note
if [[ -z $m ]]; then
    error "You must provide a release note with -m!"  && usage && die;
fi

#check for git repo
if ! $(git rev-parse --is-inside-work-tree); then
    error "Must be invoked in a git repository!"  && usage  && die; 
fi

commit=$(git rev-parse --short HEAD);
tagcommand="git tag -a ${prefix}_${commit} -m \"${m}\"";
pushcommand="git push --tags";
branch="$(git symbolic-ref --short HEAD)";

#warn the user of what they are about to do
echo "\nCommit ${commit} on ${B}${branch}${NC} will be tagged ${G}${prefix}_${commit}${NC} for ${target}.\n";

if ask "Proceed and push tags?" N; then
    echo;
    echo "${G}Awesome! Here we go.${NC}";
    eval $tagcommand && eval $pushcommand;
    echo "${G}Done!${NC} :)"
else
    error "\nNevermind!" && die;
fi