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src/addons/00-modules.sh

 #!/bin/bash
 [ ! -n "$KERNELVER"  ] && KERNELVER=$(uname -r)
 [ ! -n "$MODDIR"  ] && MODDIR=/lib/modules/${KERNELVER}
-if [ ! -d $MODDIR ] ; then
-	echo -e "\033[31;1mModule directory not found"
-	echo -e "  ->$MODDIR\033[;0m"
-	exit 1
-fi
-echo -e "  \033[34;1mKernel Version:\033[;0m ${KERNELVER}"
-echo -e "  \033[34;1mModule Directory:\033[;0m ${MODDIR}"
+[ -d $MODDIR ] || err "Module directory not found  -> $MODDIR"
+
+debug "Kernel Version: ${KERNELVER}"
+debug "Module Directory: ${MODDIR}"
 mkdir -p ${WORKDIR}/${MODDIR}
-echo -e "  \033[34;1mInstall:\033[;0m main modules"
+debug "Install: main modules"
 cp -prf ${MODDIR}/kernel/{crypto,fs,lib} ${WORKDIR}/${MODDIR}
-echo -e "  \033[34;1mInstall:\033[;0m drivers"
+debug "Install: drivers"
 cp -prf ${MODDIR}/kernel/drivers/{block,ata,md,firewire} ${WORKDIR}/${MODDIR}
 cp -prf ${MODDIR}/kernel/drivers/{scsi,pcmcia,virtio} ${WORKDIR}/${MODDIR}
 cp -prf ${MODDIR}/kernel/drivers/usb/{host,storage} ${WORKDIR}/${MODDIR}

src/addons/01-extra-modules.sh

-get_module_with_dep(){
-    name=$1
-    modinfo $name | grep filename | awk '{print $2}'
-    for i in $(modinfo $name | grep depends | awk '{print $2}' | sed "s/,/ /g")
-    do
-        modinfo $i | grep filename | awk '{print $2}'
-    done
-}
 add_extra_module(){
     while read line
     do
         name=$(basename $line)
-        echo -e "  \033[34;1mInstall:\033[;0m $name"
+        debug "Install: $name"
         mkdir -p ${WORKDIR}/$line
         rmdir ${WORKDIR}/$line
         cat $line > ${WORKDIR}/$line

src/addons/98-busybox.sh

+debug "Install busybox: $(which busybox)"
+install $(which busybox) $WORKDIR/busybox >/dev/null

src/addons/99-config.sh

 [ "$CONFIG" != "" ] || CONFIG=/etc/initrd.conf
-echo -e "  \033[34;1mUsing config:\033[;0m $CONFIG"
+debug "Using config: $CONFIG"
 mkdir -p ${WORKDIR}/etc
 if [ -f $CONFIG ] ; then
    cat ${CONFIG} > ${WORKDIR}/etc/initrd.conf

src/build-functions.sh

+. /lib/initrd/common.sh
+help_msg(){
+cat <<    EOF
+Usage $(basename $0) [OPTIONS]
+Targeting options list:
+  OUPTUP           Target initrd file output location. 
+  WORKDIR          Working directory. Created by mktemp command.
+  KERNELVER        Target kernel version. Default is current kernel.
+  MODDIR           Target module director. Default is current module directory.
+  CONFIG           Used config file location. Default is /etc/initrd.conf
+General option list:
+  -d / --debug     Print debug log.
+  -k / --keep      Do not remove working directory after building.
+  -h / --help      Print this message.
+  -n / --no-color  Disable colorized output.
+  -c / --no-cpio   Do not generate initrd image.
+  -f / --fallback  Generate fallback initrd image.
+EOF
+}
+
+get_module_with_dep(){
+	name=$1
+	modinfo $name | grep filename | awk '{print $2}'
+	for i in $(modinfo $name | grep depends | awk '{print $2}' | sed "s/,/ /g")
+	do
+		modinfo $i | grep filename | awk '{print $2}'
+	done
+}
+parse_args(){
+	export src=/lib/initrd/
+	export WORKDIR=$(mktemp)
+	export OUTPUT=/boot/initrd.img-$(uname -r)
+	export nocolor=false
+	for i in $*
+	do
+		if [ "$i" == "-h" ] || [ "$i" == "--help" ] ; then
+			help_msg
+			exit 0
+		elif [ "$i" == "-d" ] || [ "$i" == "--debug" ]; then
+			export debug=true
+		elif [ "$i" == "-k" ] || [ "$i" == "--keep" ] ; then
+			export keepwordkir=true
+		elif [ "$i" == "-n" ] || [ "$i" == "--no-color" ] ; then
+			nocolor=true
+		elif [ "$i" == "-c" ] || [ "$i" == "--no-cpio" ] ; then
+			nocpio=true
+		elif [ "$i" == "-f" ] || [ "$i" == "--fallback" ] ; then
+			fallback=true
+		else
+			export $i
+	fi
+	done
+}
+generate_workdir(){
+	msg "Creating workdir $WORKDIR"
+	rm -f $WORKDIR
+	mkdir -p $WORKDIR
+	cp -prf $src/scripts $WORKDIR/scripts
+	for file in functions vars common init
+	do
+		install $src/$file.sh $WORKDIR/$file
+	done
+}
+modules_install(){
+	for i in $(ls $src/addons | sort)
+	do
+		inf "Install modules: $i"
+		. $src/addons/$i 
+	done
+}
+
+generate_cpio(){
+	msg "Build: $OUTPUT "
+	cd $WORKDIR
+	if [ "$nocpio" != "true" ] ; then
+		echo -ne " ${C_GREEN}*${C_CLEAR} Generating: "
+		find . | cpio -R root:root -H newc -o | gzip > $OUTPUT
+	fi
+	if [ "$fallback" == "true" ] ; then
+		echo -ne " ${C_GREEN}*${C_CLEAR} Generating fallback: "
+		find . | cpio -R root:root -H newc -o | gzip > $OUTPUT-fallback
+	fi
+}
+
+clean_directory(){
+	if [ "$keepworkdir" == "true" ] ; then
+		rm -rf $WORKDIR
+		msg "Clearing workdir."
+	else
+		inf "Keeping workdir: $WORKDIR"
+	fi
+}

src/build.sh

 #!/bin/bash
-export src=/lib/initrd/
-export WORKDIR=$(mktemp)
-export OUTPUT=/boot/initrd.img-$(uname -r)
-for i in $*
-do
-	export $i
-done
-rm -f $WORKDIR
-mkdir -p $WORKDIR
-echo -e "\033[32;1mCreating workdir\033[;0m $WORKDIR"
-cp -prf $src/scripts $WORKDIR/scripts
-install $src/functions.sh $WORKDIR/functions
-install $src/vars.sh $WORKDIR/vars
-install $src/init.sh $WORKDIR/init
-for i in $(ls $src/addons | sort)
-do
-	echo -e "\033[32;1mInstall modules:\033[;0m $i"
-	. $src/addons/$i 
-done
-echo -e "\033[32;1mInstall busybox:\033[;0m $(which busybox)"
-install $(which busybox) $WORKDIR/busybox >/dev/null
-cd $WORKDIR
-echo -en "\033[32;1mBuild:\033[;0m $OUTPUT "
-find . | cpio -R root:root -H newc -o | gzip > $OUTPUT
-echo -e "\033[32;1mDone\033[;0m"
+set -e
+. /lib/initrd/build-functions.sh
+parse_args $*
+. /lib/initrd/common.sh
+generate_workdir
+modules_install
+generate_cpio
+clean_directory

src/common.sh

+if [ -t 0 ] && [ "$nocolor" == "false" ] ;then
+    C_BLACK='\e[1;30m'
+    C_RED='\e[1;31m'
+    C_GREEN='\e[1;32m'
+    C_YELLOW='\e[1;33m'
+    C_BLUE='\e[1;34m'
+    C_PURPLE='\e[1;35m'
+    C_CYAN='\e[1;36m'
+    C_WHITE='\e[1;37m'
+    C_CLEAR='\e[m'
+fi
+msg() {
+    echo -e " ${C_GREEN}*${C_CLEAR} ${@}"
+}
+
+inf() {
+    echo -e " ${C_CYAN}*${C_CLEAR} ${@}"
+}
+debug() {
+    [ ! -n "$debug"  ] || echo -e " ${C_BLUE}*${C_CLEAR} ${@}"
+}
+warn() {
+    echo -e " ${C_YELLOW}*${C_CLEAR} ${@}"
+}
+err() {
+    echo -e " ${C_RED}*${C_CLEAR} ${@}"
+}

src/init.sh

 #!/busybox ash
 . /vars
+. /etc/initrd.conf
+. /common
 . /functions
 generate_rootfs
 mount_handler

src/vars.sh

 PATH=/bin:/usr/bin:/usr/sbin:/sbin
 TERM=linux
 rootfstype=ext4
-if [ -t 0 ];then
-    C_BLACK='\e[1;30m'
-    C_RED='\e[1;31m'
-    C_GREEN='\e[1;32m'
-    C_YELLOW='\e[1;33m'
-    C_BLUE='\e[1;34m'
-    C_PURPLE='\e[1;35m'
-    C_CYAN='\e[1;36m'
-    C_WHITE='\e[1;37m'
-    C_CLEAR='\e[m'
-fi
-msg() {
-    echo -e " ${C_GREEN}*${C_CLEAR} ${@}"
-}
-debug() {
-    [ ! -n "$debug"  ] || echo -e " ${C_BLUE}*${C_CLEAR} ${@}"
-}
-warn() {
-    echo -e " ${C_YELLOW}*${C_CLEAR} ${@}"
-}
-err() {
-    echo -e " ${C_RED}*${C_CLEAR} ${@}"
-}
-. /etc/initrd.conf
+nocolor=false