phpswitcher

#!/bin/sh
# @author   Thomas Baier <thomas.baier.halle@gmail.com>
# @license  MIT

. "${0%/*}"/.lib

# check for available PHP binaries
if ! PHP_ALTERNATIVES="$(sudo update-alternatives --list php --quiet)"; then
    error ${ERROR_NO_BINARIES}
fi

# bind current version info
current_php_version_name=$(php -r 'echo PHP_VERSION;')
current_php_version_id=$(php -r 'echo PHP_VERSION_ID;')

# display current version
info ${INFO_CURRENT_VERSION} ${current_php_version_name}

# check for alternative binaries
case ${PHP_ALTERNATIVES} in
    *[[:space:]]*)
        break ;;
    *) error ${ERROR_NO_ALTERNATIVE_BINARIES} ;;
esac
CHOICES_COUNT=$(echo "$PHP_ALTERNATIVES" | wc -w)
if [ "$CHOICES_COUNT" -lt 2 ]; then
   error ${ERROR_NO_ALTERNATIVE_BINARIES}
fi

# check for current version in selection
for available_phpversion in ${PHP_ALTERNATIVES}; do
    available_phpversion_id=$(${available_phpversion} -r 'echo PHP_VERSION_ID;')
    if [ "$available_phpversion_id" = "$current_php_version_id" ]; then
        current_match=${available_phpversion}
        CHOICES_COUNT=$((CHOICES_COUNT-1))
    fi
done

# remove current from selection if matched
if [ -n "$current_match" ]; then
    PHP_ALTERNATIVES=$(echo ${PHP_ALTERNATIVES} | sed "s#$current_match##g")
fi

# begin interaction
selection=
until [ "$selection" = "0" ]; do
    label_counter=1
    # print choices
    for choice in ${PHP_ALTERNATIVES}; do
        echo "${label_counter}) ${choice}";
        label_counter=$((label_counter+1))
    done
    # start interaction
    printf "${COLOR_ORANGE}${INFO_CHOICE_LABEL}${COLOR_END}\n"
    read selection
    case ${selection} in
        * ) validate_choice ${selection}; break ;;
    esac
done