new setup version; more modular

setup/os-dependencies/setup.zsh

@@ -0,0 +1,78 @@
+################################################################################
+### Automated System Dependency Install ########################################
+################################################################################
+
+[ $DOTWRYN_PATH ]\
+	&& DEPENDENCY_DIR="$DOTWRYN_PATH/setup/os-dependencies" \
+	|| DEPENDENCY_DIR="${0:a:h}"
+
+function OS_DEPENDENCY__SETUP() {
+	local ERROR=0
+	STATUS 'checking os dependencies'
+
+	local OS_NAME=$(lsb_release -is | tr '[:upper:]' '[:lower:]')
+	STATUS "detected os '$OS_NAME'"
+
+	case $OS_NAME in
+		arch )
+			OS_INSTALL() { OS_INSTALL__ARCH $@; }
+			;;
+		debian | ubuntu )
+			OS_INSTALL() { OS_INSTALL__DEBIAN $@; }
+			OS_NAME='debian'
+			;;
+		* )
+			WARNING
+			WARNING "no automated installer available for '$OS_NAME'"
+			WARNING "if dependency shows a warning, install the indicated package"
+			WARNING
+			OS_INSTALL() { OS_INSTALL__GENERIC $@; }
+			OS_NAME='generic'
+			;;
+	esac
+
+	for DEPENDENCY in $(cat "$DEPENDENCY_DIR/$OS_NAME.txt")
+	do
+		OS_INSTALL $DEPENDENCY || ERROR=1
+	done
+	unset -f OS_INSTALL
+
+	[[ $ERROR -eq 0 ]] && {
+		SUCCESS 'all dependencies satisfied'
+		USER_PROMPT 'continue with install? [Y/n]'
+		READ_K yn
+		[[ $yn =~ ^[nN] ]] && ERROR=1; true
+	} || {
+		WARNING 'detected errors; double check warnings before proceeding!'
+		USER_PROMPT 'continue with install? [y/N]'
+		READ_K yn
+		[[ $yn =~ ^[yY] ]] && ERROR=0
+	}
+
+	return $ERROR
+}
+
+function OS_INSTALL__ARCH() {
+	local TARGET="$1"
+	CHECK "checking for $TARGET"
+	pacman -Qq | grep -q "^$TARGET$" && OK || {
+		WARN "$TARGET not found"
+		CHECK "installing $TARGET"
+		sudo pacman -Syu --noconfirm $TARGET >>$LOG 2>&1 \
+			&& OK || { WARN "failed to install $TARGET"; return 1; }
+	}
+}
+
+function OS_INSTALL__DEBIAN() {
+	local TARGET="$1"
+	CHECK "checking / installing $PACKAGE"
+	sudo apt-get install --yes $PACKAGE >>$LOG 2>&1 \
+		&& OK || { WARN "failed to install $TARGET"; return 1; }
+}
+
+function OS_INSTALL__GENERIC() {
+	local COMMAND="$1"
+	CHECK "checking for $COMMAND"
+	command -v $COMMAND >/dev/null 2>&1 \
+		&& OK || { WARN; return 1; }
+}