conf

#!/bin/sh

# conf - Simple configuration profile manager 
#
# A part of confman (https://github.com/ianayl/confman)

MASTERDIR="$HOME/etc"
SCRIPTDIR="$HOME/bin"

usage () {
    >&2 echo "Usage: $0 [options] [profile]
\t-l\tload selected configuration profile
\t-c\tclear current configuration
\t-q\tlist all configuration profiles
\t-h\tbrings up this help message"
    exit
}

# symlinks scripts
linkScripts () {
    ln -sv "$MASTERDIR/scripts" "$SCRIPTDIR"
}

removeScripts () {
    [ -L "$SCRIPTDIR" ] && rm -v "$SCRIPTDIR"
}

# remove old configs
clearConf () {
    if [ -s "$MASTERDIR/profiles/.oldlinks" ] 
    then
        while IFS= read -r line || [ -n "$line" ]
        do
	    if [ -L "$line" ]
	    then
		echo "==> Removing $line"
	        rm "$line"
	    else
	        >&2 echo "Warning: $line stated in .oldlinks is not a symlink, not removing."
	    fi
        done < "$MASTERDIR/profiles/.oldlinks"
        rm "$MASTERDIR/profiles/.oldlinks"
	echo "==> Cleared old configuration"
	[ "$1" = "-e" ] && exit 0
    fi
    echo "==> Configurations clean, nothing to clear."
}

# link new configs
loadConf () {
    clearConf
    if [ -s "$MASTERDIR/profiles/.oldlinks" ]
    then
        >&2 echo "Error: Old links not yet removed, please remove old links with ."
	exit 1
    elif [ -n "$1" ] && [ -f "$MASTERDIR/profiles/$1/links" ]
    then
        while IFS= read -r line || [ -n "$line" ]
        do
	    src="$MASTERDIR/profiles/$1/$(echo $line | cut -d'>' -f 1 | tr -d "[:space:]")"
	    dest="$HOME/$(echo $line | cut -d'>' -f 2 | tr -d "[:space:]")"
	    echo "==> Linking '$src' -> '$dest'"
	    mkdir -pv "$(dirname $dest)"
	    ln -s "$src" "$dest" && echo "$dest" >> "$MASTERDIR/profiles/.oldlinks"
        done < "$MASTERDIR/profiles/$1/links"
    else
        >&2 echo "Error: Invalid profile issued."
	exit 1
    fi
}

queryConf() {
    current_dir=$PWD
    cd $MASTERDIR/profiles
    ls -d */
    cd $current_dir
}


[ "$1" ] || usage
case $1 in
    -c) clearConf -e ;;
    -l) loadConf $2 ;;
    -q) queryConf ;;
    --script-link) linkScripts ;;
    --script-remove) removeScripts ;;
    *) usage ;;
esac