Tools/Scripts/container-sdk-rootdir-wrapper - external/github.com/WebKit/webkit - Git at Google

 #!/usr/bin/env sh
 #
 # Copyright (C) 2025 Igalia S.L.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
 #
 # 1. Redistributions of source code must retain the above copyright notice, this
 #    list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright notice,
 #    this list of conditions and the following disclaimer in the documentation
 #    and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 set -eu

 SCRIPTPATH="$(realpath -- "${0}")"
 SCRIPTDIR="$(dirname -- "${SCRIPTPATH}")"
 WEBKITDIR="$(realpath -- "${SCRIPTDIR}/../..")"
 WEBKIT_SOURCE_DIR="${WEBKIT_SOURCE_DIR:-${WEBKITDIR}}"
 WEBKIT_SOURCE_DIR="$(realpath -m -- "${WEBKIT_SOURCE_DIR}")"

 help() {
     cat <<EOF
 Usage: ${0} program-to-execute [arguments...]
        ${0} --create-symlink

 This script is used by the WebKit tooling when running inside the
 webkit-container-sdk for GTK/WPE port development. It enables building
 WebKit and running tests inside a common path at /sdk/webkit.

 Options:
     -h, --help         Show this help message
     --create-symlink   Create /sdk/webkit as a symlink to ${WEBKIT_SOURCE_DIR}
                        and exit. Useful for tools not executed through this
                        wrapper (like gdb) that need to resolve /sdk/webkit paths.

 Default behavior:
     Creates a private mount namespace where /sdk/webkit is a bind-mount
     to ${WEBKIT_SOURCE_DIR}, then executes the specified program.

 Examples:
     ${0} Tools/Scripts/build-webkit --wpe --release
     ${0} --create-symlink
 EOF
     exit 0
 }

 error() {
     printf '%s\n' "${@}" 1>&2
     exit 1
 }

 # If path starts with ${WEBKIT_SOURCE_DIR}, replace that prefix with /sdk/webkit.
 maybe_replace_path_prefix_to_rootsdk() {
     case "${1}" in
         "${WEBKIT_SOURCE_DIR}"|"${WEBKIT_SOURCE_DIR}"/*)
             printf '%s\n' "/sdk/webkit${1#"${WEBKIT_SOURCE_DIR}"}"
         ;;
         *)
             printf '%s\n' "${1}"
         ;;
     esac
 }

 resolve_relpath_to_abs_if_outside() {
     abs=$(realpath -m -- "${ORGPWD}/${1}")
     case "${abs}" in
         "${WEBKIT_SOURCE_DIR}"|"${WEBKIT_SOURCE_DIR}"/*)
             # Inside the tree: keep original relative value
             printf '%s\n' "${1}"
         ;;
         *) # relative path outside the tree: make it absolute
             printf '%s\n' "${abs}"
         ;;
     esac
 }

 maybe_update_relpath_to_abs_if_outside() {
     case "${1}" in
         ""|/*|*://*)
             # do not touch if is empty or looks like an abs path or a URL
             printf '%s\n' "${1}"
         ;;
         .|..|./*|../*|*/*)
             resolve_relpath_to_abs_if_outside "${1}"
         ;;
         *)
             if [ -L "${1}" ]; then
                 resolve_relpath_to_abs_if_outside "${1}"
             else
                 printf '%s\n' "${1}"
             fi
         ;;
     esac
 }

 # Convert relative paths to absolute if they point outside ${WEBKIT_SOURCE_DIR}
 args_maybe_update_outside_relpaths() {
     for arg in "${@}"; do
         case "${arg}" in
             --*=*)  # handle arguments like "--option=value"
                 key="${arg%%=*}"
                 val="${arg#*=}"
                 val="$(maybe_update_relpath_to_abs_if_outside "${val}")"
                 arg="${key}=${val}"
                 ;;
             *)
                 arg="$(maybe_update_relpath_to_abs_if_outside "${arg}")"
                 ;;
         esac
         printf "'"
         printf '%s' "${arg}" | sed "s/'/'\\\\''/g"
         printf "' "
     done
 }

 [ "$#" -ge 1 ] || help
 [ "${1}" = "--help" ] && help
 [ "${1}" = "-h" ] && help

 [ -d "${WEBKIT_SOURCE_DIR}" ] || error "Can't find directory: ${WEBKIT_SOURCE_DIR}"
 [ -d /sdk ] || error "Can't find /sdk directory"
 [ -w /sdk ] || error "Directory /sdk is not writable for user $(whoami)"

 case "${WEBKIT_SOURCE_DIR}" in
   /sdk|/sdk/*) error "${0} should not be invoked with WEBKIT_SOURCE_DIR under /sdk directory" ;;
 esac

 if [ "${1}" = "--create-symlink" ]; then
     [ "$#" -ge 2 ] && error "No extra arguments can be passed with --create-symlink"
     if [ -L "/sdk/webkit" ]; then
         CURSYMLINKDEST="$(realpath -m -- /sdk/webkit)"
         if [ "${CURSYMLINKDEST}" != "${WEBKIT_SOURCE_DIR}" ]; then
             rm -f "/sdk/webkit"
             ln -s "${WEBKIT_SOURCE_DIR}" "/sdk/webkit"
             echo "Symlink at /sdk/webkit changed from ${CURSYMLINKDEST} to ${WEBKIT_SOURCE_DIR}"
         fi
     elif ! [ -e "/sdk/webkit" ]; then
         ln -s "${WEBKIT_SOURCE_DIR}" "/sdk/webkit"
     else
         error "ERROR: /sdk/webkit exists and is not a symlink. This is unexpected"
     fi
     exit 0
 fi

 CURUID="$(id -u)"
 CURGID="$(id -g)"
 ORGPWD="$(pwd)"
 SDKPWD="$(maybe_replace_path_prefix_to_rootsdk "${ORGPWD}")"
 # Try also with the realpath, just in case pwd is inside a symlinked dir.
 if [ "${ORGPWD}" = "${SDKPWD}" ]; then
     ORGPWD="$(realpath -- "${ORGPWD}")"
     SDKPWD="$(maybe_replace_path_prefix_to_rootsdk "${ORGPWD}")"
 fi
 # When $(pwd) is inside ${WEBKIT_SOURCE_DIR}, switch (cd) to the equivalent bind-mount path
 # under /sdk/webkit. Any relative path arguments that point outside ${WEBKIT_SOURCE_DIR} are
 # converted to absolute paths first, since they wouldn't resolve correctly after the switch.
 [ "${ORGPWD}" != "${SDKPWD}" ] && eval "set -- $(args_maybe_update_outside_relpaths "${@}")"

 # Since util-linux 2.27 is not needed to execute mount --make-rprivate /
 # because unshare does that automatically by default for new mount namespaces
 exec unshare -rm sh -c '
     set -eu
     WEBKIT_SOURCE_DIR="${1}"
     SDKPWD="${2}"
     CURUID="${3}"
     CURGID="${4}"
     shift 4
     mount -t tmpfs -o size=16M tmpfs /sdk
     mkdir /sdk/webkit
     mount --bind "${WEBKIT_SOURCE_DIR}" /sdk/webkit
     cd "${SDKPWD}"
     export WEBKIT_CONTAINER_SDK_INSIDE_MOUNT_NAMESPACE=1
     exec unshare --map-user="${CURUID}" --map-group="${CURGID}" -- "${@}"
 ' -- "${WEBKIT_SOURCE_DIR}" "${SDKPWD}" "${CURUID}" "${CURGID}" "${@}"
	#!/usr/bin/env sh
	#
	# Copyright (C) 2025 Igalia S.L.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are met:
	#
	# 1. Redistributions of source code must retain the above copyright notice, this
	# list of conditions and the following disclaimer.
	# 2. Redistributions in binary form must reproduce the above copyright notice,
	# this list of conditions and the following disclaimer in the documentation
	# and/or other materials provided with the distribution.
	#
	# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
	# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
	# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	#
	set -eu

	SCRIPTPATH="$(realpath -- "${0}")"
	SCRIPTDIR="$(dirname -- "${SCRIPTPATH}")"
	WEBKITDIR="$(realpath -- "${SCRIPTDIR}/../..")"
	WEBKIT_SOURCE_DIR="${WEBKIT_SOURCE_DIR:-${WEBKITDIR}}"
	WEBKIT_SOURCE_DIR="$(realpath -m -- "${WEBKIT_SOURCE_DIR}")"

	help() {
	cat <<EOF
	Usage: ${0} program-to-execute [arguments...]
	${0} --create-symlink

	This script is used by the WebKit tooling when running inside the
	webkit-container-sdk for GTK/WPE port development. It enables building
	WebKit and running tests inside a common path at /sdk/webkit.

	Options:
	-h, --help Show this help message
	--create-symlink Create /sdk/webkit as a symlink to ${WEBKIT_SOURCE_DIR}
	and exit. Useful for tools not executed through this
	wrapper (like gdb) that need to resolve /sdk/webkit paths.

	Default behavior:
	Creates a private mount namespace where /sdk/webkit is a bind-mount
	to ${WEBKIT_SOURCE_DIR}, then executes the specified program.

	Examples:
	${0} Tools/Scripts/build-webkit --wpe --release
	${0} --create-symlink
	EOF
	exit 0
	}

	error() {
	printf '%s\n' "${@}" 1>&2
	exit 1
	}

	# If path starts with ${WEBKIT_SOURCE_DIR}, replace that prefix with /sdk/webkit.
	maybe_replace_path_prefix_to_rootsdk() {
	case "${1}" in
	"${WEBKIT_SOURCE_DIR}"\|"${WEBKIT_SOURCE_DIR}"/*)
	printf '%s\n' "/sdk/webkit${1#"${WEBKIT_SOURCE_DIR}"}"
	;;
	*)
	printf '%s\n' "${1}"
	;;
	esac
	}

	resolve_relpath_to_abs_if_outside() {
	abs=$(realpath -m -- "${ORGPWD}/${1}")
	case "${abs}" in
	"${WEBKIT_SOURCE_DIR}"\|"${WEBKIT_SOURCE_DIR}"/*)
	# Inside the tree: keep original relative value
	printf '%s\n' "${1}"
	;;
	*) # relative path outside the tree: make it absolute
	printf '%s\n' "${abs}"
	;;
	esac
	}

	maybe_update_relpath_to_abs_if_outside() {
	case "${1}" in
	""\|/\|://*)
	# do not touch if is empty or looks like an abs path or a URL
	printf '%s\n' "${1}"
	;;
	.\|..\|./\|../\|/)
	resolve_relpath_to_abs_if_outside "${1}"
	;;
	*)
	if [ -L "${1}" ]; then
	resolve_relpath_to_abs_if_outside "${1}"
	else
	printf '%s\n' "${1}"
	fi
	;;
	esac
	}

	# Convert relative paths to absolute if they point outside ${WEBKIT_SOURCE_DIR}
	args_maybe_update_outside_relpaths() {
	for arg in "${@}"; do
	case "${arg}" in
	--=) # handle arguments like "--option=value"
	key="${arg%%=*}"
	val="${arg#*=}"
	val="$(maybe_update_relpath_to_abs_if_outside "${val}")"
	arg="${key}=${val}"
	;;
	*)
	arg="$(maybe_update_relpath_to_abs_if_outside "${arg}")"
	;;
	esac
	printf "'"
	printf '%s' "${arg}" \| sed "s/'/'\\\\''/g"
	printf "' "
	done
	}

	[ "$#" -ge 1 ] \|\| help
	[ "${1}" = "--help" ] && help
	[ "${1}" = "-h" ] && help

	[ -d "${WEBKIT_SOURCE_DIR}" ] \|\| error "Can't find directory: ${WEBKIT_SOURCE_DIR}"
	[ -d /sdk ] \|\| error "Can't find /sdk directory"
	[ -w /sdk ] \|\| error "Directory /sdk is not writable for user $(whoami)"

	case "${WEBKIT_SOURCE_DIR}" in
	/sdk\|/sdk/*) error "${0} should not be invoked with WEBKIT_SOURCE_DIR under /sdk directory" ;;
	esac

	if [ "${1}" = "--create-symlink" ]; then
	[ "$#" -ge 2 ] && error "No extra arguments can be passed with --create-symlink"
	if [ -L "/sdk/webkit" ]; then
	CURSYMLINKDEST="$(realpath -m -- /sdk/webkit)"
	if [ "${CURSYMLINKDEST}" != "${WEBKIT_SOURCE_DIR}" ]; then
	rm -f "/sdk/webkit"
	ln -s "${WEBKIT_SOURCE_DIR}" "/sdk/webkit"
	echo "Symlink at /sdk/webkit changed from ${CURSYMLINKDEST} to ${WEBKIT_SOURCE_DIR}"
	fi
	elif ! [ -e "/sdk/webkit" ]; then
	ln -s "${WEBKIT_SOURCE_DIR}" "/sdk/webkit"
	else
	error "ERROR: /sdk/webkit exists and is not a symlink. This is unexpected"
	fi
	exit 0
	fi

	CURUID="$(id -u)"
	CURGID="$(id -g)"
	ORGPWD="$(pwd)"
	SDKPWD="$(maybe_replace_path_prefix_to_rootsdk "${ORGPWD}")"
	# Try also with the realpath, just in case pwd is inside a symlinked dir.
	if [ "${ORGPWD}" = "${SDKPWD}" ]; then
	ORGPWD="$(realpath -- "${ORGPWD}")"
	SDKPWD="$(maybe_replace_path_prefix_to_rootsdk "${ORGPWD}")"
	fi
	# When $(pwd) is inside ${WEBKIT_SOURCE_DIR}, switch (cd) to the equivalent bind-mount path
	# under /sdk/webkit. Any relative path arguments that point outside ${WEBKIT_SOURCE_DIR} are
	# converted to absolute paths first, since they wouldn't resolve correctly after the switch.
	[ "${ORGPWD}" != "${SDKPWD}" ] && eval "set -- $(args_maybe_update_outside_relpaths "${@}")"

	# Since util-linux 2.27 is not needed to execute mount --make-rprivate /
	# because unshare does that automatically by default for new mount namespaces
	exec unshare -rm sh -c '
	set -eu
	WEBKIT_SOURCE_DIR="${1}"
	SDKPWD="${2}"
	CURUID="${3}"
	CURGID="${4}"
	shift 4
	mount -t tmpfs -o size=16M tmpfs /sdk
	mkdir /sdk/webkit
	mount --bind "${WEBKIT_SOURCE_DIR}" /sdk/webkit
	cd "${SDKPWD}"
	export WEBKIT_CONTAINER_SDK_INSIDE_MOUNT_NAMESPACE=1
	exec unshare --map-user="${CURUID}" --map-group="${CURGID}" -- "${@}"
	' -- "${WEBKIT_SOURCE_DIR}" "${SDKPWD}" "${CURUID}" "${CURGID}" "${@}"