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#!/bin/sh
# Copyright (C) 2014 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# =*= License: GPL-2 =*=
#
#
# This is a write extension for making a package that can be used to
# install the produced system. Ideally we'd instead have Baserock
# everywhere to do the deployment, but we need to support this workflow
# until that is possible.
#
# It gets configured with a script templates that get filled in with the
# paths to the rootfs tarball as @@ROOTFS_TAR_PATH@@, script directory as
# @@SCRIPT_DIR@@ and copied boot-files as @@IMAGE_DIR@@.
#
# Scripts to include are specified as a relative path to your morphologies
# repository, separated by : characters in the INCLUDE_SCRIPTS variable.
# If another separator is convenient, it can be specified in the
# INCLUDE_SCRIPTS_SEPARATOR variable, which has the same semantics as the
# shell IFS variable.
#
# Other files needed to create the disk image, such as bootloader image
# files can be specified in BOOTLOADER_BLOBS, relative to the root of the
# rootfs, separated with similar rules to INCLUDE_SCRIPTS.
#
# The name of the rootfs tarball, the scripts subdirectory and the
# bootloader blobs subdirectory can be changed with the ROOTFS_TAR,
# SCRIPT_SUBDIR and IMAGE_SUBDIR variables, but the default should be
# sufficient.
#
# The compression of the rootfs tarball, and the package tarball can be
# specified by specifying a shell command that reads the uncompressed
# tarball from stdin and writes to stdout in the ROOTFS_COMPRESS and
# OUTPUT_COMPRESS variables.
set -eu
die(){
echo "$@" >&2
exit 1
}
warn(){
echo "$@" >&2
}
info(){
echo "$@" >&2
}
shellescape(){
echo "'$(echo "$1" | sed -e "s/'/'\\''/g")'"
}
sedescape(){
# Escape the passed in string so it can be safely interpolated into
# a sed expression as a literal value.
echo "$1" | sed -e 's/[\/&]/\\&/g'
}
ROOTDIR="$1"
OUTPUT_TAR="$2"
td="$(mktemp -d)"
IMAGE_SUBDIR="${IMAGE_SUBDIR-image_files}"
SCRIPT_SUBDIR="${SCRIPT_SUBDIR-tools}"
ROOTFS_TAR="${ROOTFS_TAR-rootfs.tar}"
install_script(){
local source_file="$1"
local output_dir="$2"
local target_file="$output_dir/$SCRIPT_SUBDIR/$(basename "$source_file" .in)"
local find_script_dir='"$(readlink -f "$(dirname "$0")")"'
local image_dir="$find_script_dir/../$(shellescape "$IMAGE_SUBDIR")"
local rootfs_tar_path="$image_dir/$(shellescape "$ROOTFS_TAR")"
sed -e "s/@@SCRIPT_DIR@@/$(sedescape "$find_script_dir")/g" \
-e "s/@@IMAGE_DIR@@/$(sedescape "$image_dir")/g" \
-e "s/@@ROOTFS_TAR_PATH@@/$(sedescape "$rootfs_tar_path")/g" \
"$source_file" \
| install -D -m 755 /proc/self/fd/0 "$target_file"
}
install_scripts(){
local output_dir="$1"
(
IFS="${INCLUDE_SCRIPTS_SEPATATOR-:}"
for script in $INCLUDE_SCRIPTS; do
local script_path="$(pwd)/$script"
if [ ! -e "$script_path" ]; then
warn Script "$script" not found, ignoring
continue
fi
install_script "$script" "$output_dir"
done
)
}
install_bootloader_blobs(){
local output_dir="$1"
local image_dir="$output_dir/$IMAGE_SUBDIR"
(
IFS="${BOOTLOADER_BLOBS_SEPATATOR-:}"
for blob in $BOOTLOADER_BLOBS; do
local blob_path="$ROOTDIR/$blob"
if [ ! -e "$blob_path" ]; then
warn Bootloader blob "$blob" not found, ignoring
continue
fi
install -D -m644 "$blob_path" "$image_dir/$(basename "$blob_path")"
done
)
}
output_dir="$(basename "$OUTPUT_TAR")"
for ext in .xz .bz2 .gzip .gz .tgz .tar; do
output_dir="${output_dir%$ext}"
done
info Installing scripts
install_scripts "$td/$output_dir"
info Installing bootloader blobs
install_bootloader_blobs "$td/$output_dir"
info Writing rootfs tar to "$IMAGE_SUBDIR/$ROOTFS_TAR"
tar -C "$ROOTDIR" -c . \
| sh -c "${ROOTFS_COMPRESS-cat}" >"$td/$output_dir/$IMAGE_SUBDIR/$ROOTFS_TAR"
info Writing image package tar to "$OUTPUT_TAR"
tar -C "$td" -c "$output_dir" | sh -c "${OUTPUT_COMPRESS-cat}" >"$OUTPUT_TAR"
|
