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#!/usr/bin/env bash
# -*- coding: utf-8 -*-
# region header
# Copyright Torben Sickert (t.sickert["~at~"]gmail.com) 29.10.2015
# Janosch Dobler (TODO) 29.10.2015
# License
# -------
# This library written by Torben Sickert and Janosch Dobler stand under a
# creative commons naming 3.0 unported license.
# see http://creativecommons.org/licenses/by/3.0/deed.de
# This tool provides a generic way to install systemd based remote linux
# initramfs.
# Examples
# --------
# Start install progress command (Assuming internet is available):
# >>> ./build_initramfs.sh
# Note that you only get very necessary output until you provide "--verbose" as
# commandline options.
# Dependencies
# ------------
# - bash (or any bash like shell)
# - cpio - Copies files into or out of a cpio or tar archive. The
# archive can be another file on the disk, a magnetic tape,
# or a pipe.
# - git - The stupid content tracker.
# - test - Check file types and compare values (part of the shell).
# - shift - Shifts the command line arguments (part of the shell).
# - echo - Display a line of text (part of coreutils).
# - mktemp - Create a temporary file or directory (part of coreutils).
# - cat - Concatenate files and print on the standard output (part of
# coreutils).
# - rm - Remove files or directories (part of coreutils).
# - sed - Stream editor for filtering and transforming text.
# - gzip - Compress or expand files.
# - curl - Transfer a URL
# - tar - The GNU version of the tar archiving utility.
# - make - GNU make utility to maintain groups of programs.
# - cmake - The "cmake" executable is the CMake command-line interface.
# - linux-headers - GNU make utility to maintain groups of programs.
# - grep - Searches the named input files (or standard input if no
# files are named, or if a single hyphen-minus (-) is given
# as file name) for lines containing a match to the given
# PATTERN. By default, grep prints the matching lines.
source dnbd3-rootfs/scripts/utils.sh
__NAME__='build_initramfs'
# endregion
function build_initramfs() {
# Provides the main module scope.
# region properties
local _SCOPE='local' && \
if [[ $(echo "\"$@\"" | grep --extended-regexp \
'(^"| )(-l|--load-environment)("$| )') != '' ]]
then
local _SCOPE='export'
fi
# NOTE: Only initialize environment if current scope wasn't set yet.
if [ "$UTILS_VERBOSE" == '' ]; then
"$_SCOPE" UTILS_VERBOSE='no'
"$_SCOPE" _LOAD_ENVIRONMENT='no'
"$_SCOPE" _CREATE_SYSTEM_IMAGE='no'
local dependencies=(bash cpio git test shift echo mktemp cat rm sed \
gzip curl tar grep make cmake)
"$_SCOPE" _DEPENDENCIES="${dependencies[*]}"
fi
# endregion
# region functions
## region command line interface
function build_initramfs_print_usage_message() {
# Prints a description about how to use this program.
cat << EOF
$__NAME__ provides a generic way to install systemd based remote linux
initramfs.
EOF
}
function build_initramfs_print_usage_examples() {
# Prints a description about how to use this program by providing
# examples.
cat << EOF
# Start install progress:
# >>> ./build_initramfs.sh
EOF
}
function build_initramfs_print_command_line_option_description() {
# Prints descriptions about each available command line option.
cat << EOF
-h --help Shows this help message.
-v --verbose Tells you what is going on (default: "$_VERBOSE").
-d --debug Gives you any output from all tools which are used
(default: "$_DEBUG").
-l --load-environment Simple load the install arch linux scope without
doing anything else.
-c --create-system-image Creates a system image file for given path
(default: "$_CREATE_SYSTEM_IMAGE").
EOF
}
function build_initramfs_print_help_message() {
# Provides a help message for this module.
echo -e "\nUsage: $0 [options]\n"
build_initramfs_print_usage_message "$@"
echo -e '\nExamples:\n'
build_initramfs_print_usage_examples "$@"
echo -e '\nOption descriptions:\n'
build_initramfs_print_command_line_option_description "$@"
echo
}
function build_initramfs_command_line_interface() {
# Provides the command line interface and interactive questions.
while true; do
case "$1" in
-h|--help)
shift
build_initramfs_print_help_message "$0"
exit 0
;;
-v|--verbose)
shift
UTILS_VERBOSE='yes'
;;
-d|--debug)
shift
UTILS_STANDARD_OUTPUT=/dev/stdout
UTILS_ERROR_OUTPUT=/dev/stderr
;;
-l|--load-environment)
shift
_LOAD_ENVIRONMENT='yes'
;;
-c|--create-system-image)
shift
_CREATE_SYSTEM_IMAGE="$1"
shift
;;
'')
shift
break
;;
*)
utils_log 'critical' \
"Given argument: \"$1\" is not available." '\n' && \
if [[ "$_SCOPE" == 'local' ]]; then
build_initramfs_print_help_message "$0"
fi
return 1
esac
done
if [[ "$UID" != '0' ]]; then
utils_log 'critical' \
"You have to run this script as \"root\" not as \"${USER}\"."
exit 2
fi
return 0
}
## endregion
function build_initramfs_initialize_dracut() {
# Downloads and compiles dracut.
#
# Examples:
#
# >>> build_initramfs_initialize_dracut
# ...
mkdir dracut 1>"$UTILS_STANDARD_OUTPUT" 2>"$UTILS_ERROR_OUTPUT" && \
utils_log 'Download and extract dracut.' && \
curl --location \
https://www.kernel.org/pub/linux/utils/boot/dracut/dracut-043.tar.gz | \
tar --extract --gzip --directory dracut --strip-components 1 \
1>"$UTILS_STANDARD_OUTPUT" 2>"$UTILS_ERROR_OUTPUT" && \
pushd dracut 1>"$UTILS_STANDARD_OUTPUT" 2>"$UTILS_ERROR_OUTPUT" && \
# NOTE: On virtualbox shared folder symlinks are not allowed.
# make the dracut-install binary (dracut-install resolves dependencies etc.)
utils_log 'Compile dracut.' && \
make install/dracut-install 1>"$UTILS_STANDARD_OUTPUT" \
2>"$UTILS_ERROR_OUTPUT" && \
# NOTE: We have to copy the binary to current instead of symlinking
# them since this feature isn't supported in shared virtual box
# machine folders. If symlinks would be available we could simply
# use:
# >>> make dracut-install
cp install/dracut-install dracut-install 1>"$UTILS_STANDARD_OUTPUT" \
2>"$UTILS_ERROR_OUTPUT" && \
popd 1>"$UTILS_STANDARD_OUTPUT" 2>"$UTILS_ERROR_OUTPUT"
return $?
}
function build_initramfs_create_qcow2_system() {
# Packs current distribution in a qcow2 container.
#
# Examples:
#
# >>> build_initramfs_create_qcow2_system
# TODO
qemu-img create -f qcow2 "${CONTAINER_PATH}" "${QCOW_SIZE}"
return $?
}
# endregion
# region controller
if [[ "$0" == *"${__NAME__}.sh" ]]; then
utils_dependency_check "${_DEPENDENCIES[*]}" || \
utils_log 'error' 'Satisfying main dependencies failed.'
build_initramfs_command_line_interface "$@" || return $?
utils_log 'Checking dracut.' && \
if ! [[ -d ./dracut ]]; then
utils_log "Dracut isn't available yet loading it." && \
utils_initialize_dracut
fi
utils_log 'Build initramfs.' && \
utils_log 'Copy dnbd3 qcow2 plugin into dracut modules folder.' && \
cp --recursive dnbd3-rootfs/ dracut/modules.d/90dndb3-rootfs \
1>"$UTILS_STANDARD_OUTPUT" 2>"$UTILS_ERROR_OUTPUT" && \
dracut/dracut.sh --local --verbose --force \
1>"$UTILS_STANDARD_OUTPUT" 2>"$UTILS_ERROR_OUTPUT"
fi
return 0
# endregion
}
# region footer
if [[ "$0" == *"${__NAME__}.sh" || $(echo "$@" | grep --extended-regexp \
'(^| )(-l|--load-environment)($| )') ]]; then
"$__NAME__" "$@"
fi
# endregion
# region vim modline
# vim: set tabstop=4 shiftwidth=4 expandtab:
# vim: foldmethod=marker foldmarker=region,endregion:
# endregion
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