ladybird/Meta/shell_include.sh
Dominique Liberda d7644d1d86 Meta: Improve build compatibility with non-GNU userspaces
We depend on GNU-specific du switch `--apparent-size`. Busybox has this
implemented, but as `-b` instead.
Another part of the build system uses `cp --preserve=timestamps`. This
can be replaced by `rsync -t`, and rsync is already used through the
file.

Thanks to those changes, Serenity can be built on a Busybox system,
without GNU coreutils.
2023-07-09 06:16:31 +01:00

102 lines
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# shellcheck shell=bash
# shellcheck disable=SC2034
# SC2034: "Variable appears unused. Verify it or export it."
# Those are intentional here, as the file is meant to be included elsewhere.
# NOTE: If using another privilege escalation binary make sure it is configured or has the appropiate flag
# to keep the current environment variables in the launched process (in sudo's case this is achieved
# through the -E flag described in sudo(8).
die() {
echo "die: $*"
exit 1
}
if [ "$(uname -s)" = "SerenityOS" ]; then
SUDO="pls -E"
elif command -v sudo >/dev/null; then
SUDO="sudo -E"
elif command -v doas >/dev/null; then
if [ "$SUDO_UID" = '' ]; then
SUDO_UID=$(id -u)
SUDO_GID=$(id -g)
export SUDO_UID SUDO_GID
fi
# To make doas work, you have to make sure you use the "keepenv" flag in doas.conf
SUDO="doas"
else
die "You need sudo, doas or pls to build Serenity..."
fi
exit_if_running_as_root() {
if [ "$(id -u)" -eq 0 ]; then
die "$*"
fi
}
find_executable() {
paths=("/usr/sbin" "/sbin")
if [ "$(uname -s)" = "Darwin" ]; then
if [ -n "${HOMEBREW_PREFIX}" ]; then
paths+=("${HOMEBREW_PREFIX}/opt/e2fsprogs/bin" "${HOMEBREW_PREFIX}/opt/e2fsprogs/sbin")
elif command -v brew > /dev/null 2>&1; then
if prefix=$(brew --prefix e2fsprogs 2>/dev/null); then
paths+=("${prefix}/bin" "${prefix}/sbin")
fi
fi
fi
executable="${1}"
# Prefer tools from PATH over fallback paths
if command -v "${executable}"; then
return 0
fi
for path in "${paths[@]}"; do
if command -v "${path}/${executable}"; then
return 0
fi
done
# We return the executable's name back to provide meaningful messages on future failure
echo "${executable}"
}
FUSE2FS_PATH="$(find_executable fuse2fs)"
RESIZE2FS_PATH="$(find_executable resize2fs)"
E2FSCK_PATH="$(find_executable e2fsck)"
MKE2FS_PATH="$(find_executable mke2fs)"
get_number_of_processing_units() {
number_of_processing_units="nproc"
SYSTEM_NAME="$(uname -s)"
if [ "$SYSTEM_NAME" = "OpenBSD" ]; then
number_of_processing_units="sysctl -n hw.ncpuonline"
elif [ "$SYSTEM_NAME" = "FreeBSD" ]; then
number_of_processing_units="sysctl -n hw.ncpu"
elif [ "$SYSTEM_NAME" = "Darwin" ]; then
number_of_processing_units="sysctl -n hw.ncpu"
fi
($number_of_processing_units)
}
# We depend on GNU coreutils du for the --apparent-size extension.
# GNU coreutils is a build dependency.
if command -v gdu > /dev/null 2>&1 && gdu --version | grep -q "GNU coreutils"; then
GNUDU="gdu"
else
GNUDU="du"
fi
disk_usage() {
# shellcheck disable=SC2003,SC2307
expr "$(${GNUDU} -sbm "$1" | cut -f1)"
}
inode_usage() {
find "$1" | wc -l
}