[gentoo-commits] repo/gentoo:master commit in: eclass/

["Maciej Barć" <xgqt@gentoo.org>]

commit:     33953bf9dd7aef94ab2d5862cb003765d749566f
Author:     Maciej Barć <xgqt <AT> gentoo <DOT> org>
AuthorDate: Fri Sep 15 14:46:52 2023 +0000
Commit:     Maciej Barć <xgqt <AT> gentoo <DOT> org>
CommitDate: Fri Sep 15 20:46:59 2023 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=33953bf9

eclass/dotnet-pkg-base.eclass: add new dotnet-pkg-base eclass

common functions and variables for builds using .NET SDK

Bug: https://bugs.gentoo.org/900597
Bug: https://github.com/gentoo/gentoo/pull/32109
Signed-off-by: Maciej Barć <xgqt <AT> gentoo.org>

 eclass/dotnet-pkg-base.eclass | 628 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 628 insertions(+)

diff --git a/eclass/dotnet-pkg-base.eclass b/eclass/dotnet-pkg-base.eclass
new file mode 100644
index 000000000000..c7f2e031daec
--- /dev/null
+++ b/eclass/dotnet-pkg-base.eclass
@@ -0,0 +1,628 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: dotnet-pkg-base.eclass
+# @MAINTAINER:
+# Gentoo Dotnet project <dotnet@gentoo.org>
+# @AUTHOR:
+# Anna Figueiredo Gomes <navi@vlhl.dev>
+# Maciej Barć <xgqt@gentoo.org>
+# @SUPPORTED_EAPIS: 8
+# @PROVIDES: nuget
+# @BLURB: common functions and variables for builds using .NET SDK
+# @DESCRIPTION:
+# This eclass is designed to provide required ebuild definitions for .NET
+# packages. Beware that in addition to Gentoo-specific concepts also terms that
+# should be known to people familiar with the .NET ecosystem are used through
+# this one and similar eclasses.
+#
+# In ebuilds for software that only utilizes the .NET SDK, without special
+# cases, the "dotnet-pkg.eclass" is probably better suited.
+#
+# This eclass does not export any phase functions, for that see
+# the "dotnet-pkg" eclass.
+
+case ${EAPI} in
+	8) ;;
+	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
+esac
+
+if [[ -z ${_DOTNET_PKG_BASE_ECLASS} ]] ; then
+_DOTNET_PKG_BASE_ECLASS=1
+
+inherit edo multiprocessing nuget
+
+# @ECLASS_VARIABLE: DOTNET_PKG_COMPAT
+# @REQUIRED
+# @PRE_INHERIT
+# @DESCRIPTION:
+# Allows to choose a slot for dotnet.
+#
+# Most .NET packages will lock onto one supported .NET major version.
+# DOTNET_PKG_COMPAT should specify which version was chosen by package upstream.
+# In case multiple .NET versions are specified in the project, then the highest
+# should be picked by the maintainer.
+
+# @ECLASS_VARIABLE: DOTNET_PKG_RDEPS
+# @DESCRIPTION:
+# Populated with important dependencies on .NET ecosystem packages for running
+# .NET packages.
+#
+# "DOTNET_PKG_RDEPS" should appear (or conditionally appear) in "RDEPEND".
+DOTNET_PKG_RDEPS=""
+
+# @ECLASS_VARIABLE: DOTNET_PKG_BDEPS
+# @DESCRIPTION:
+# Populated with important dependencies on .NET ecosystem packages for building
+# .NET packages.
+#
+# "DOTNET_PKG_BDEPS" should appear (or conditionally appear) in "BDEPEND".
+DOTNET_PKG_BDEPS=""
+
+# Have this guard to be sure that *DEPS are not added to
+# the "dev-dotnet/dotnet-runtime-nugets" package dependencies.
+if [[ ${CATEGORY}/${PN} != dev-dotnet/dotnet-runtime-nugets ]] ; then
+	if [[ -z ${DOTNET_PKG_COMPAT} ]] ; then
+		die "${ECLASS}: DOTNET_PKG_COMPAT not set"
+	fi
+
+	DOTNET_PKG_RDEPS+=" virtual/dotnet-sdk:${DOTNET_PKG_COMPAT} "
+	DOTNET_PKG_BDEPS+=" ${DOTNET_PKG_RDEPS} "
+
+	# Special package "dev-dotnet/csharp-gentoodotnetinfo" used for information
+	# gathering, example for usage see the "dotnet-pkg-base_info" function.
+	if [[ ${CATEGORY}/${PN} != dev-dotnet/csharp-gentoodotnetinfo ]] ; then
+		DOTNET_PKG_BDEPS+=" dev-dotnet/csharp-gentoodotnetinfo "
+	fi
+
+	IUSE+=" debug "
+fi
+
+# Needed otherwise the binaries may break.
+RESTRICT+=" strip "
+
+# Everything is built by "dotnet".
+QA_PREBUILT=".*"
+
+# Special .NET SDK environment variables.
+# Setting them either prevents annoying information from being generated
+# or stops services that may interfere with a clean package build.
+export DOTNET_CLI_TELEMETRY_OPTOUT=1
+export DOTNET_NOLOGO=1
+export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
+export MSBUILDDISABLENODEREUSE=1
+export POWERSHELL_TELEMETRY_OPTOUT=1
+export POWERSHELL_UPDATECHECK=0
+# Overwrite selected MSBuild properties ("-p:XYZ").
+export UseSharedCompilation=false
+
+# @ECLASS_VARIABLE: DOTNET_PKG_RUNTIME
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Sets the runtime used to build a package.
+#
+# This variable is set automatically by the "dotnet-pkg-base_setup" function.
+
+# @ECLASS_VARIABLE: DOTNET_PKG_EXECUTABLE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Sets path of a "dotnet" executable.
+#
+# This variable is set automatically by the "dotnet-pkg-base_setup" function.
+
+# @ECLASS_VARIABLE: DOTNET_PKG_CONFIGURATION
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Configuration value passed to "dotnet" in the compile phase.
+# Is either Debug or Release, depending on the "debug" USE flag.
+#
+# This variable is set automatically by the "dotnet-pkg-base_setup" function.
+
+# @ECLASS_VARIABLE: DOTNET_PKG_OUTPUT
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Path of the output directory, where the package artifacts are placed during
+# the building of packages with "dotnet-pkg-base_build" function.
+#
+# This variable is set automatically by the "dotnet-pkg-base_setup" function.
+
+# @VARIABLE: _DOTNET_PKG_LAUNCHERDEST
+# @INTERNAL
+# @DESCRIPTION:
+# Sets the path that .NET launchers are installed into by
+# the "dotnet-pkg-base_dolauncher" function.
+#
+# The function "dotnet-pkg-base_launcherinto" is able to manipulate this
+# variable.
+#
+# Defaults to "/usr/bin".
+_DOTNET_PKG_LAUNCHERDEST=/usr/bin
+
+# @VARIABLE: _DOTNET_PKG_LAUNCHERVARS
+# @INTERNAL
+# @DESCRIPTION:
+# Sets additional variables for .NET launchers created by
+# the "dotnet-pkg-base_dolauncher" function.
+#
+# The function "dotnet-pkg-base_append_launchervar" is able to manipulate this
+# variable.
+#
+# Defaults to a empty array.
+_DOTNET_PKG_LAUNCHERVARS=()
+
+# @FUNCTION: dotnet-pkg-base_get-configuration
+# @DESCRIPTION:
+# Return .NET configuration type of the current package.
+#
+# It is advised to refer to the "DOTNET_PKG_CONFIGURATION" variable instead of
+# calling this function if necessary.
+#
+# Used by "dotnet-pkg-base_setup".
+dotnet-pkg-base_get-configuration() {
+	if in_iuse debug && use debug ; then
+		echo Debug
+	else
+		echo Release
+	fi
+}
+
+# @FUNCTION: dotnet-pkg-base_get-output
+# @USAGE: <name>
+# @DESCRIPTION:
+# Return a specially constructed name of a directory for output of
+# "dotnet build" artifacts ("--output" flag, see "dotnet-pkg-base_build").
+#
+# It is very rare that a maintainer would use this function in an ebuild.
+#
+# This function is used inside "dotnet-pkg-base_setup".
+dotnet-pkg-base_get-output() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	[[ -z ${DOTNET_PKG_CONFIGURATION} ]] &&
+		die "${FUNCNAME[0]}: DOTNET_PKG_CONFIGURATION is not set."
+
+	echo "${WORKDIR}/${1}_net${DOTNET_PKG_COMPAT}_${DOTNET_PKG_CONFIGURATION}"
+}
+
+# @FUNCTION: dotnet-pkg-base_get-runtime
+# @DESCRIPTION:
+# Return the .NET runtime used for the current package.
+#
+# Used by "dotnet-pkg-base_setup".
+dotnet-pkg-base_get-runtime() {
+	local libc
+	libc="$(usex elibc_musl "-musl" "")"
+
+	if use amd64 ; then
+		echo "linux${libc}-x64"
+	elif use x86 ; then
+		echo "linux${libc}-x86"
+	elif use arm ; then
+		echo "linux${libc}-arm"
+	elif use arm64 ; then
+		echo "linux${libc}-arm64"
+	else
+		die "${FUNCNAME[0]}: Unsupported architecture: ${ARCH}"
+	fi
+}
+
+# @FUNCTION: dotnet-pkg-base_setup
+# @DESCRIPTION:
+# Sets up "DOTNET_PKG_EXECUTABLE" variable for later use in "edotnet".
+# Also sets up "DOTNET_PKG_CONFIGURATION" and "DOTNET_PKG_OUTPUT"
+# for "dotnet-pkg_src_configure" and "dotnet-pkg_src_compile".
+#
+# This functions should be called by "pkg_setup".
+#
+# Used by "dotnet-pkg_pkg_setup" from the "dotnet-pkg" eclass.
+dotnet-pkg-base_setup() {
+	local dotnet_compat_impl
+	local dotnet_compat_impl_path
+	for dotnet_compat_impl in dotnet{,-bin}-${DOTNET_PKG_COMPAT} ; do
+		dotnet_compat_impl_path="$(type -P "${dotnet_compat_impl}")"
+
+		if [[ -n ${dotnet_compat_impl_path} ]] ; then
+			DOTNET_PKG_EXECUTABLE=${dotnet_compat_impl}
+			DOTNET_PKG_EXECUTABLE_PATH="${dotnet_compat_impl_path}"
+
+			break
+		fi
+	done
+
+	# Link "DOTNET_PKG_EXECUTABLE" to "dotnet" only for the package build.
+	local dotnet_spoof_path="${T}"/dotnet_spoof/${DOTNET_PKG_COMPAT}
+	mkdir -p "${dotnet_spoof_path}" || die
+	ln -s "${DOTNET_PKG_EXECUTABLE_PATH}" "${dotnet_spoof_path}"/dotnet || die
+	export PATH="${dotnet_spoof_path}:${PATH}"
+
+	einfo "Using dotnet SDK \"${DOTNET_PKG_EXECUTABLE}\" from \"${DOTNET_PKG_EXECUTABLE_PATH}\"."
+
+	# The picked "DOTNET_PKG_EXECUTABLE" should set "DOTNET_ROOT" internally
+	# and not rely upon this environment variable.
+	unset DOTNET_ROOT
+
+	# Unset .NET and NuGet directories.
+	unset DOTNET_DATA
+	unset NUGET_DATA
+
+	DOTNET_PKG_RUNTIME="$(dotnet-pkg-base_get-runtime)"
+	DOTNET_PKG_CONFIGURATION="$(dotnet-pkg-base_get-configuration)"
+	DOTNET_PKG_OUTPUT="$(dotnet-pkg-base_get-output "${P}")"
+}
+
+# @FUNCTION: dotnet-pkg-base_remove-global-json
+# @USAGE: [directory]
+# @DESCRIPTION:
+# Remove the "global.json" if it exists.
+# The file in question might lock target package to a specified .NET
+# version, which might be unnecessary (as it is in most cases).
+#
+# Optional "directory" argument defaults to the current directory path.
+#
+# Used by "dotnet-pkg_src_prepare" from the "dotnet-pkg" eclass.
+dotnet-pkg-base_remove-global-json() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local file="${1:-.}"/global.json
+
+	if [[ -f "${file}" ]] ; then
+		ebegin "Removing the global.json file"
+		rm "${file}"
+		eend ${?} || die "${FUNCNAME[0]}: failed to remove ${file}"
+	fi
+}
+
+# @FUNCTION: edotnet
+# @USAGE: <command> [args...]
+# @DESCRIPTION:
+# Call dotnet, passing the supplied arguments.
+edotnet() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	if [[ -z ${DOTNET_PKG_EXECUTABLE} ]] ; then
+	   die "${FUNCNAME[0]}: DOTNET_PKG_EXECUTABLE not set. Was dotnet-pkg-base_setup called?"
+	fi
+
+	edo "${DOTNET_PKG_EXECUTABLE}" "${@}"
+}
+
+# @FUNCTION: dotnet-pkg-base_info
+# @DESCRIPTION:
+# Show information about current .NET SDK that is being used.
+#
+# Depends upon the "gentoo-dotnet-info" program installed by
+# the "dev-dotnet/csharp-gentoodotnetinfo" package.
+#
+# Used by "dotnet-pkg_src_configure" from the "dotnet-pkg" eclass.
+dotnet-pkg-base_info() {
+	if [[ ${CATEGORY}/${PN} == dev-dotnet/csharp-gentoodotnetinfo ]] ; then
+		debug-print-function "${FUNCNAME[0]}: ${P} is a special package, skipping dotnet-pkg-base_info"
+	elif command -v gentoo-dotnet-info >/dev/null ; then
+		gentoo-dotnet-info || die "${FUNCNAME[0]}: failed to execute gentoo-dotnet-info"
+	else
+		ewarn "${FUNCNAME[0]}: gentoo-dotnet-info not available"
+	fi
+}
+
+# @FUNCTION: dotnet-pkg-base_foreach-solution
+# @USAGE: <function> [directory]
+# @DESCRIPTION:
+# Execute a function for each solution file (.sln) in a specified directory.
+# This function may yield no real results because solutions are discovered
+# automatically.
+#
+# Optional "directory" argument defaults to the current directory path.
+#
+# Used by "dotnet-pkg_src_configure" from the "dotnet-pkg" eclass.
+dotnet-pkg-base_foreach-solution() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local dotnet_solution
+	local dotnet_solution_name
+	while read -r dotnet_solution ; do
+		dotnet_solution_name="$(basename "${dotnet_solution}")"
+
+		ebegin "Running \"${1}\" for solution: \"${dotnet_solution_name}\""
+		"${1}" "${dotnet_solution}"
+		eend $? "${FUNCNAME[0]}: failed for solution: \"${dotnet_solution}\"" || die
+	done < <(find "${2:-.}" -maxdepth 1 -type f -name "*.sln")
+}
+
+# @FUNCTION: dotnet-pkg-base_restore
+# @USAGE: [directory] [args] ...
+# @DESCRIPTION:
+# Restore the package using "dotnet restore" in a specified directory.
+#
+# Optional "directory" argument defaults to the current directory path.
+#
+# Additionally any number of "args" maybe be given, they are appended to
+# the "dotnet" command invocation.
+#
+# Used by "dotnet-pkg_src_configure" from the "dotnet-pkg" eclass.
+dotnet-pkg-base_restore() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local directory
+	if [[ "${1}" ]] ; then
+		directory="${1}"
+		shift
+	else
+		directory="$(pwd)"
+	fi
+
+	local -a restore_args=(
+		--runtime "${DOTNET_PKG_RUNTIME}"
+		--source "${NUGET_PACKAGES}"
+		-maxCpuCount:$(makeopts_jobs)
+		"${@}"
+	)
+
+	edotnet restore "${restore_args[@]}" "${directory}"
+}
+
+# @FUNCTION: dotnet-pkg-base_restore_tools
+# @USAGE: [config-file] [args] ...
+# @DESCRIPTION:
+# Restore dotnet tools for a project in the current directory.
+#
+# Optional "config-file" argument is used to specify a file for the
+# "--configfile" option which records what tools should be restored.
+#
+# Additionally any number of "args" maybe be given, they are appended to
+# the "dotnet" command invocation.
+dotnet-pkg-base_restore_tools() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local -a tool_restore_args=(
+		--add-source "${NUGET_PACKAGES}"
+	)
+
+	if [[ "${1}" ]] ; then
+		tool_restore_args+=( --configfile "${1}" )
+		shift
+	fi
+
+	tool_restore_args+=( "${@}" )
+
+	edotnet tool restore "${tool_restore_args[@]}"
+}
+
+# @FUNCTION: dotnet-pkg-base_build
+# @USAGE: [directory] [args] ...
+# @DESCRIPTION:
+# Build the package using "dotnet build" in a specified directory.
+#
+# Optional "directory" argument defaults to the current directory path.
+#
+# Additionally any number of "args" maybe be given, they are appended to
+# the "dotnet" command invocation.
+#
+# Used by "dotnet-pkg_src_compile" from the "dotnet-pkg" eclass.
+dotnet-pkg-base_build() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local directory
+	if [[ "${1}" ]] ; then
+		directory="${1}"
+		shift
+	else
+		directory="$(pwd)"
+	fi
+
+	local -a build_args=(
+		--configuration "${DOTNET_PKG_CONFIGURATION}"
+		--no-restore
+		--no-self-contained
+		--output "${DOTNET_PKG_OUTPUT}"
+		--runtime "${DOTNET_PKG_RUNTIME}"
+		-maxCpuCount:$(makeopts_jobs)
+		"${@}"
+	)
+
+	if ! use debug ; then
+		build_args+=(
+			-p:StripSymbols=true
+			-p:NativeDebugSymbols=false
+		)
+	fi
+
+	edotnet build "${build_args[@]}" "${directory}"
+}
+
+# @FUNCTION: dotnet-pkg-base_test
+# @USAGE: [directory] [args] ...
+# @DESCRIPTION:
+# Test the package using "dotnet test" in a specified directory.
+#
+# Optional "directory" argument defaults to the current directory path.
+#
+# Additionally any number of "args" maybe be given, they are appended to
+# the "dotnet" command invocation.
+#
+# Used by "dotnet-pkg_src_test" from the "dotnet-pkg" eclass.
+dotnet-pkg-base_test() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local directory
+	if [[ "${1}" ]] ; then
+		directory="${1}"
+		shift
+	else
+		directory="$(pwd)"
+	fi
+
+	local -a test_args=(
+		--configuration "${DOTNET_PKG_CONFIGURATION}"
+		--no-restore
+		-maxCpuCount:$(makeopts_jobs)
+		"${@}"
+	)
+
+	edotnet test "${test_args[@]}" "${directory}"
+}
+
+# @FUNCTION: dotnet-pkg-base_install
+# @USAGE: [directory]
+# @DESCRIPTION:
+# Install the contents of "DOTNET_PKG_OUTPUT" into a directory, defaults to
+# "/usr/share/${P}".
+#
+# Installation directory is relative to "ED".
+dotnet-pkg-base_install() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local installation_directory="${1:-/usr/share/${P}}"
+
+	dodir "${installation_directory}"
+	cp -r "${DOTNET_PKG_OUTPUT}"/* "${ED}/${installation_directory}/" || die
+}
+
+# @FUNCTION: dotnet-pkg-base_launcherinto
+# @USAGE: <directory>
+# @DESCRIPTION:
+# Changes the path .NET launchers are installed into via subsequent
+# "dotnet-pkg-base_dolauncher" calls.
+#
+# For more info see the "_DOTNET_PKG_LAUNCHERDEST" variable.
+dotnet-pkg-base_launcherinto() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	[[ -z ${1} ]] && die "${FUNCNAME[0]}: no directory specified"
+
+	_DOTNET_PKG_LAUNCHERDEST="${1}"
+}
+
+# @FUNCTION: dotnet-pkg-base_append_launchervar
+# @USAGE: <variable-setting>
+# @DESCRIPTION:
+# Appends a given variable setting to the "_DOTNET_PKG_LAUNCHERVARS".
+#
+# WARNING: This functions modifies a global variable permanently!
+# This means that all launchers created in subsequent
+# "dotnet-pkg-base_dolauncher" calls of a given package will have
+# the given variable set.
+#
+# Example:
+# @CODE
+# dotnet-pkg-base_append_launchervar "DOTNET_EnableAlternateStackCheck=1"
+# @CODE
+#
+# For more info see the "_DOTNET_PKG_LAUNCHERVARS" variable.
+dotnet-pkg-base_append_launchervar() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	[[ -z ${1} ]] && die "${FUNCNAME[0]}: no variable setting specified"
+
+	_DOTNET_PKG_LAUNCHERVARS+=( "${1}" )
+}
+
+# @FUNCTION: dotnet-pkg-base_dolauncher
+# @USAGE: <executable-path> [filename]
+# @DESCRIPTION:
+# Make a wrapper script to launch an executable built from a .NET package.
+#
+# If no file name is given, the `basename` of the executable is used.
+#
+# Parameters:
+# ${1} - path of the executable to launch,
+# ${2} - filename of launcher to create (optional).
+#
+# Example:
+# @CODE
+# dotnet-pkg-base_install
+# dotnet-pkg-base_dolauncher /usr/share/${P}/${PN^}
+# @CODE
+#
+# The path is prepended by "EPREFIX".
+dotnet-pkg-base_dolauncher() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local executable_path executable_name
+
+	if [[ "${1}" ]] ; then
+		local executable_path="${1}"
+		shift
+	else
+		die "${FUNCNAME[0]}: No executable path given."
+	fi
+
+	if [[ ${#} -eq 0 ]] ; then
+		executable_name="$(basename "${executable_path}")"
+	else
+		executable_name="${1}"
+		shift
+	fi
+
+	local executable_target="${T}/${executable_name}"
+
+	cat <<-EOF > "${executable_target}" || die
+	#!/bin/sh
+
+	# Launcher script for ${executable_path} (${executable_name}),
+	# created from package "${CATEGORY}/${P}",
+	# compatible with dotnet version ${DOTNET_PKG_COMPAT}.
+
+	for __dotnet_root in \\
+		${EPREFIX}/usr/$(get_libdir)/dotnet-sdk-${DOTNET_PKG_COMPAT} \\
+		${EPREFIX}/opt/dotnet-sdk-bin-${DOTNET_PKG_COMPAT} ; do
+		[ -d \${__dotnet_root} ] && break
+	done
+
+	DOTNET_ROOT="\${__dotnet_root}"
+	export DOTNET_ROOT
+
+	$(for var in "${_DOTNET_PKG_LAUNCHERVARS[@]}" ; do
+		echo "${var}"
+		echo "export ${var%%=*}"
+	done)
+
+	exec "${EPREFIX}${executable_path}" "\${@}"
+	EOF
+
+	exeinto "${_DOTNET_PKG_LAUNCHERDEST}"
+	doexe "${executable_target}"
+}
+
+# @FUNCTION: dotnet-pkg-base_dolauncher_portable
+# @USAGE: <dll-path> <filename>
+# @DESCRIPTION:
+# Make a wrapper script to launch a .NET DLL file built from a .NET package.
+#
+# Parameters:
+# ${1} - path of the DLL to launch,
+# ${2} - filename of launcher to create.
+#
+# Example:
+# @CODE
+# dotnet-pkg-base_dolauncher_portable \
+#     /usr/share/${P}/GentooDotnetInfo.dll gentoo-dotnet-info
+# @CODE
+#
+# The path is prepended by "EPREFIX".
+dotnet-pkg-base_dolauncher_portable() {
+	debug-print-function "${FUNCNAME[0]}" "${@}"
+
+	local dll_path="${1}"
+	local executable_name="${2}"
+	local executable_target="${T}/${executable_name}"
+
+	cat <<-EOF > "${executable_target}" || die
+	#!/bin/sh
+
+	# Launcher script for ${dll_path} (${executable_name}),
+	# created from package "${CATEGORY}/${P}",
+	# compatible with any dotnet version, built on ${DOTNET_PKG_COMPAT}.
+
+	$(for var in "${_DOTNET_PKG_LAUNCHERVARS[@]}" ; do
+		echo "${var}"
+		echo "export ${var%%=*}"
+	done)
+
+	exec dotnet exec "${EPREFIX}${dll_path}" "\${@}"
+	EOF
+
+	exeinto "${_DOTNET_PKG_LAUNCHERDEST}"
+	doexe "${executable_target}"
+}
+
+fi