mkbkp

#!/bin/sh
# Copy $NAMES files and directory, clone the $GITREPOS it repositories, and put
# everything into $BKPDIR (default CWD).
#
# Usage: ./mkbkp [config file]
# Using sudo: sudo -Eu $(id -un) ./mkbkp [config file]

# enabled supports
SUPPORT="
bkp_names
bkp_sunames
bkp_gitrepos
"

OPWD="$(pwd)"
NEWLINE='
'

bkp_names() {
	setdir "names"
	mexec "$NAMES" "cp -rf %s ."
}

bkp_sunames() {
	setdir "sunames"
	mexec "$SUNAMES" "sudo cp -rf %s ."
}

bkp_gitrepos() {
	setdir "gitrepos"
	mexec "$GITREPOS" "git clone %s"
}

die() {
	echo "$@"
	exit 1
}

setdir() {
	dir="$1"
	[ "$dir" != "$BKPDIR" ] && cd "${OPWD}/${BKPDIR}"
	if [ ! -d "$dir" ]; then
		mkdir -p "$dir"
		rv=$?
		[ $rv -ne 0 ] && die "${dir}: cannot create directory"
	fi
	cd "$dir"
}

mexec() {
	list="$1"
	cmd="$2"
	[ -z "$list" -o -z "$cmd" ] && return
	for i in $list; do
		c="$(printf "$cmd" "$i")"
		c="${c} 2>&1 > /dev/null"
		eval "$c" 2>&1 > /dev/null
	done
}

isfunc() {
	type "$1" |grep -q function
}

main() {
	cfg="$1"
	[ -z "$cfg" ] && cfg=~/.mkbkprc
	[ ! -e "$cfg" ] && die "${cfg}: file not found"
	. "$cfg"

	setdir "$BKPDIR"
	echo -n "Backing up into ${BKPDIR}..."

	IFS="$NEWLINE"
	for s in $SUPPORT; do
		$s
	done
	unset IFS

	cd "$OPWD"
	echo " done."

	isfunc "onfinish" && onfinish "$BKPDIR"
}

main "$@"