install-sh

#!/bin/bash

set -e

NO_PROMPT=0
TOUCH_CONF=1
UNINST=0
case $1 in
    -f)
    	NO_PROMPT=1
        TOUCH_CONF=0
        shift
        ;;
    -fc)
    	NO_PROMPT=1
        shift
    	;;
    -u)
    	NO_PROMPT=1
        UNINST=1
        TOUCH_CONF=0
        shift
    	;;
    -uc)
    	NO_PROMPT=1
        UNINST=1
        shift
        ;;
esac

if [[ "$1" != "" ]]; then
    PREFIX=${1%/}
else
    PREFIX="/usr/local"
fi
if [[ "$2" != "" ]]; then
    PREFIX_BIN=${2%/}
else
    PREFIX_BIN="$PREFIX/bin"
fi
if [[ "$3" != "" ]]; then
    PREFIX_CONF=${3%/}
else
    PREFIX_CONF="/etc"
fi

if [[ "$NO_PROMPT" == "0" ]]; then
    cat << EOF
Usage: install-sh [ -f | -fc | -u | -uc ] [ <prefix> ] [ <bin-prefix> ] [ <conf-prefix> ]
Where
    -f:  (Re-)Install program
    -fc: (Re-)Install program and configuration files
    -u:  Uninstall program
    -uc: Uninstall program and configuration files

    <prefix>:      Location (default: /usr/local)
    <bin-prefix>:  Location for binary files (default: <prefix>/bin)
    <conf-prefix>: Location for configuration files (default: /etc)


EOF
fi

CRON_FILE=""
if [[ "$TOUCH_CONF" == "1" ]]; then
    if [ -d $PREFIX_CONF/cron.daily ]; then
        # standard cron/daily path for some Linux's...
        CRON_FILE=$PREFIX_CONF/cron.daily/zz-backup2l
    elif [ -d $PREFIX_CONF/periodic/daily ]; then
        # standard cron/daily path for Mac OS X...
        CRON_FILE=$PREFIX_CONF/periodic/daily/zz-backup2l
    fi
fi

PROG_FILES="$PREFIX_BIN/backup2l $PREFIX/man/man8/backup2l.8.gz"
CONF_FILES="$PREFIX_CONF/backup2l.conf $CRON_FILE"

if [[ "$UNINST" == "0" ]]; then

    # Installation...
    if [[ "$NO_PROMPT" == "0" ]]; then
        echo -e "I am about to install the following program file(s):\n  $PROG_FILES\n"
        read -p "Do you want to continue? [y/N] " ANSWER
        echo
        if [[ "$ANSWER" != "y" ]]; then
            echo "Stopping."
            exit 1
        fi
    fi

    mkdir -p $PREFIX_BIN $PREFIX/man/man8
    cp -af backup2l $PREFIX_BIN
    gzip -9 -c backup2l.8 > $PREFIX/man/man8/backup2l.8.gz
    echo "Program files installed."

    if [[ "$TOUCH_CONF" == "1" && "$NO_PROMPT" == "0" ]]; then
        echo -e "\nI can install the following configuration file(s):\n  $CONF_FILES\n"
        echo "This is recommended for a first-time installation."
        echo -e "Warning: Previously existing files will be overwritten!\n"
        read -p "Do you want to continue? [y/N] " ANSWER
        echo
        if [[ "$ANSWER" != "y" ]]; then
            TOUCH_CONF=0
        fi
    fi

    if [[ "$TOUCH_CONF" == "1" ]]; then
        mkdir -p $PREFIX_CONF
        cp -af first-time.conf $PREFIX_CONF/backup2l.conf
        echo "Configuration files installed."
        if [[ "$CRON_FILE" != "" ]]; then
            cp -af zz-backup2l $CRON_FILE
        else
            echo -e "\nNote: No suitable cron directory found - file 'zz-backup2l' not (un-)installed automatically."
        fi
    else
        echo "No configuration files installed."
    fi

else

    # Un-installation...
    echo "Removing program file(s): $PROG_FILES"
    rm -f $PROG_FILES
    if [[ "$TOUCH_CONF" == "1" ]]; then
        echo "Removing configuration file(s): $CONF_FILES"
        rm -f $CONF_FILES
        if [[ "$CRON_FILE" == "" ]]; then
            echo -e "\nNote: Cron directory not found - eventually remove 'zz-backup2l' manually."
        fi
    else
        echo "Configuration files NOT removed."
    fi
fi