live-bootstrap/sysa/helpers.sh

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#!/bin/bash -e
# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
# SPDX-FileCopyrightText: 2021-22 fosslinux <fosslinux@aussies.space>
# SPDX-FileCopyrightText: 2021 Paul Dersey <pdersey@gmail.com>
# SPDX-FileCopyrightText: 2021 Melg Eight <public.melg8@gmail.com>
#
# SPDX-License-Identifier: GPL-3.0-or-later
# shellcheck source=/dev/null
. bootstrap.cfg
# Find a list of links
get_links() {
original="${1:-${PWD}/}"
if [ -n "$(ls)" ]; then
for f in *; do
# Bash link detection is broken
# and we don't always have grep, hence this pretty dodgy solution
case "$(ls -ld "${f}")" in
*" -> "*)
fullpath="${PWD}/${f}"
# shellcheck disable=SC2001
echo "$(readlink "${f}") /$(echo "${fullpath}" | sed "s:^${original}::")"
rm "${f}" # Don't include in tarball
;;
*)
if [ -d "${f}" ]; then
cd "${f}"
get_links "${original}"
cd ..
fi
;;
esac
done
fi
}
# Get a list of files
get_files() {
local prefix
prefix="${1}"
fs=
if [ -n "$(ls 2>/dev/null)" ]; then
fs=$(echo ./*)
fi
if [ -n "$(ls .[0-z]* 2>/dev/null)" ]; then
fs="${fs} $(echo .[0-z]*)"
fi
for f in ${fs}; do
if [ -d "${f}" ]; then
cd "${f}"
get_files "${prefix}/${f}"
cd ..
else
echo -n "${prefix}/${f} "
fi
done
}
# Reset all timestamps to unix time 0
reset_timestamp() {
args=
# touch -h is not avaliable until after grep is built.
if command -v grep >/dev/null 2>&1; then
if touch --help | grep ' \-h' >/dev/null; then
args="-h"
fi
fi
if command -v find >/dev/null 2>&1; then
# find does not error out on exec error
find . -print0 | xargs -0 touch ${args} -t 197001010000.00
else
# A rudimentary find implementation that does the trick
fs=
if [ -n "$(ls 2>/dev/null)" ]; then
fs=$(echo ./*)
fi
if [ -n "$(ls .[0-z]* 2>/dev/null)" ]; then
fs="${fs} $(echo .[0-z]*)"
fi
for f in ${fs}; do
touch ${args} -t 197001010000.00 "${f}"
if [ -d "${f}" ]; then
cd "${f}"
reset_timestamp
cd ..
fi
done
fi
}
# Fake grep
_grep() {
text="${1}"
fname="${2}"
if command -v grep >/dev/null 2>&1; then
grep "${text}" "${fname}"
else
# shellcheck disable=SC2162
while read line; do
case "${line}" in *"${text}"*)
echo "${line}" ;;
esac
done < "${fname}"
fi
}
# Common build steps
# Build function provides a few common stages with default implementation
# that can be overridden on per package basis in the build script.
# build takes three arguments:
# 1) name-version of the package
# 2) optionally specify build script. Default is name-version.sh
# 3) directory of patches. Default is patches
# 4) directory to cd into. Default is ${pkg}
build() {
pkg=$1
script_name=${2:-${pkg}.sh}
dirname=${4:-${pkg}}
cd "${SOURCES}/${pkg}" || (echo "Cannot cd into ${pkg}!"; kill $$)
echo "${pkg}: beginning build using script ${script_name}"
base_dir="${PWD}"
patch_dir="${base_dir}/${3:-patches}"
mk_dir="${base_dir}/mk"
files_dir="${base_dir}/files"
rm -rf "build"
mkdir "build"
cd "build"
build_script="${base_dir}/${script_name}"
if test -e "${build_script}"; then
# shellcheck source=/dev/null
. "${build_script}"
fi
echo "${pkg}: unpacking source."
build_stage=src_unpack
call $build_stage
unset EXTRA_DISTFILES
cd "${dirname}" || (echo "Cannot cd into build/${dirname}!"; kill $$)
echo "${pkg}: preparing source."
build_stage=src_prepare
call $build_stage
echo "${pkg}: configuring source."
build_stage=src_configure
call $build_stage
echo "${pkg}: compiling source."
build_stage=src_compile
call $build_stage
echo "${pkg}: install to fakeroot."
build_stage=src_install
call $build_stage
cd /usr/src/repo
# Get revision (n time this package has been built)
revision="$(echo "${pkg}"*)"
# Different versions of bash
if [ "${revision}" = "${pkg}*" ] || [ -z "${revision}" ]; then
revision=0
else
revision="${revision##*_}"
revision="${revision%%.*}"
revision=$((++revision))
fi
echo "${pkg}: creating package."
cd "${DESTDIR}"
src_pkg
src_checksum
echo "${pkg}: cleaning up."
rm -rf "${SOURCES}/${pkg}/build"
rm -rf "${DESTDIR}"
mkdir -p "${DESTDIR}"
echo "${pkg}: installing package."
src_apply
echo "${pkg}: build successful"
cd "${SOURCES}"
unset -f src_unpack src_prepare src_configure src_compile src_install
}
# Default unpacking function that unpacks all source tarballs.
default_src_unpack() {
distfiles=${EXTRA_DISTFILES}
# shellcheck disable=SC2153
for f in "${DISTFILES}/${pkg}."*; do
distfiles="$(basename "$f") ${distfiles}"
done
# Check for new tar
# shellcheck disable=SC2153
if test -e "${PREFIX}/libexec/rmt"; then
for i in ${distfiles}; do
tar --no-same-owner -xf "${DISTFILES}/${i}"
done
else
for i in ${distfiles}; do
case "$i" in
*.tar.gz) tar -xzf "${DISTFILES}/${i}" ;;
*.tar.bz2)
# Initial bzip2 built against meslibc has broken pipes
bzip2 -dc "${DISTFILES}/${i}" | tar -xf - ;;
*.tar.xz)
tar -xf "${DISTFILES}/${i}" --use-compress-program=xz ;;
esac
done
fi
}
# Default function to prepare source code.
# It applies all patches from patch_dir (at the moment only -p0 patches are supported).
# Then it copies our custom makefile and any other custom files from files directory.
default_src_prepare() {
if test -d "${patch_dir}"; then
for p in "${patch_dir}"/*.patch; do
echo "Applying patch: ${p}"
patch -Np0 < "${p}"
done
fi
makefile="${mk_dir}/main.mk"
if test -e "${makefile}"; then
cp "${makefile}" Makefile
fi
if test -d "${files_dir}"; then
cp "${files_dir}"/* "${PWD}/"
fi
}
# Default function for configuring source.
default_src_configure() {
:
}
# Default function for compiling source. It simply runs make without any parameters.
default_src_compile() {
make -f Makefile PREFIX="${PREFIX}"
}
# Default installing function. PREFIX should be set by run.sh script.
# Note that upstream makefiles might ignore PREFIX and have to be configured in configure stage.
default_src_install() {
make -f Makefile install PREFIX="${PREFIX}" DESTDIR="${DESTDIR}"
}
create_tarball_pkg() {
# If grep is unavailable, then tar --sort is unavailable.
# So this does not need a command -v grep.
if tar --help | grep ' \-\-sort' >/dev/null 2>&1; then
tar -C "${DESTDIR}" --sort=name --hard-dereference -cf "/usr/src/repo/${pkg}_${revision}.tar" .
elif command -v find >/dev/null 2>&1 && command -v sort >/dev/null 2>&1; then
cd "${DESTDIR}"
tar --no-recursion --null -T /tmp/filelist.txt -cf "/usr/src/repo/${pkg}_${revision}.tar"
cd -
else
echo -n > /dev/null
tar -cf "/usr/src/repo/${pkg}_${revision}.tar" -T /dev/null
cd "${DESTDIR}"
for f in $(get_files .); do
tar -rf "/usr/src/repo/${pkg}_${revision}.tar" "${f}"
done
cd -
fi
touch -t 197001010000.00 "${pkg}_${revision}.tar"
bzip2 --best "${pkg}_${revision}.tar"
}
src_pkg() {
touch -t 197001010000.00 .
reset_timestamp
if command -v xbps-create >/dev/null 2>&1; then
cd /usr/src/repo
xbps-create -A "${ARCH}" -n "${pkg}_${revision}" -s "${pkg}" --compression xz "${DESTDIR}"
echo "${pkg}: adding package to repository."
xbps-rindex --compression xz -a "/usr/src/repo/${pkg}_${revision}.${ARCH}.xbps"
else
cd "${DESTDIR}"
# All symlinks are dereferenced, which is BAD
get_links > "/usr/src/repo/${pkg}_${revision}.links"
if command -v find >/dev/null 2>&1 && command -v sort >/dev/null 2>&1; then
find . -print0 | LC_ALL=C sort -z > /tmp/filelist.txt
fi
cd /usr/src/repo
create_tarball_pkg
fi
}
src_checksum() {
if ! [ "$UPDATE_CHECKSUMS" = True ] ; then
echo "${pkg}: checksumming created package."
_grep "${pkg}_${revision}" "${SOURCES}/SHA256SUMS.pkgs" | sha256sum -c
fi
}
src_apply() {
if command -v xbps-install >/dev/null 2>&1; then
xbps-install -y -R /usr/src/repo "${pkg%%-[0-9]*}"
else
src_apply_tar "${pkg}" "${revision}"
fi
}
src_apply_tar() {
local pkg=$1 revision=$2
# Overwriting files is mega busted, so do it manually
# shellcheck disable=SC2162
if [ -e /tmp/filelist.txt ]; then
while IFS= read -d $'\0' file; do
rm -f "/${file}" >/dev/null 2>&1 || true
done < /tmp/filelist.txt
fi
bzip2 -dc "/usr/src/repo/${pkg}_${revision}.tar.bz2" | \
tar -C / -xpf -
# shellcheck disable=SC2162
# ^ read -r unsupported in old bash
while read line; do
# shellcheck disable=SC2001
# ^ cannot use variable expansion here
fname="$(echo "${line}" | sed 's/.* //')"
rm -f "${fname}"
# shellcheck disable=SC2226,SC2086
# ^ ${line} expands into two arguments
ln -s ${line}
touch -t 197001010000.00 "${fname}"
done < "/usr/src/repo/${pkg}_${revision}.links"
}
# Check if bash function exists
fn_exists() {
test "$(type -t "$1")" == 'function'
}
# Call package specific function or default implementation.
call() {
if fn_exists "$1"; then
$1
else
default_"${1}"
fi
}
# Call default build stage function
default() {
"default_${build_stage}"
}
# Set modified dates of all files to be 0 unix time.
# Should be called at the end of bootstrapping process.
# This function needs `touch` that supports --no-dereference
# (at least coreutils 8.1).
canonicalise_all_files_timestamp() {
find / -exec touch --no-dereference -t 197001010000.00 {} +
}
populate_device_nodes() {
# http://www.linuxfromscratch.org/lfs/view/6.1/chapter06/devices.html
mkdir -p "${1}/dev"
rm "${1}/dev/null" -f
test -c "${1}/dev/null" || mknod -m 666 "${1}/dev/null" c 1 3
test -c "${1}/dev/zero" || mknod -m 666 "${1}/dev/zero" c 1 5
test -c "${1}/dev/random" || mknod -m 444 "${1}/dev/random" c 1 8
test -c "${1}/dev/urandom" || mknod -m 444 "${1}/dev/urandom" c 1 9
if [ "${CHROOT}" = False ]; then
test -c "${1}/dev/ptmx" || mknod -m 666 "${1}/dev/ptmx" c 5 2
test -c "${1}/dev/tty" || mknod -m 666 "${1}/dev/tty" c 5 0
test -c "${1}/dev/console" || mknod -m 666 "${1}/dev/console" c 5 1
fi
}
sys_transfer() {
local dest=$1
mkdir -p "${dest}/${PREFIX}/bin" "${dest}/${PREFIX}/src"
# Bash, Tar and Bzip2 are required to install packages
cp "${PREFIX}/bin/bash" "${PREFIX}/bin/tar" "${PREFIX}/bin/bzip2" "${dest}${PREFIX}/bin/"
# Transfer misc files
cp "${SOURCES}/helpers.sh" "${SOURCES}/SHA256SUMS.pkgs" "${SOURCES}/bootstrap.cfg" "${dest}/"
cp -r "${PREFIX}/src/" "${dest}${PREFIX}/"
shift
# Copy additional binaries
set -- "${@/#/${PREFIX}/bin/}"
cp "$@" "${dest}${PREFIX}/bin/"
}