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# Copyright (c) 2018 Ribose Inc.
# All rights reserved.
#
# 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 HOLDERS 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.
#.rst:
# FindGnuPG
# -----------
#
# Find GnuPG executables.
#
# Imported targets
# ^^^^^^^^^^^^^^^^
#
# This module defines the following :prop_tgt:`IMPORTED` targets:
#
# ::
#
# GnuPG::<COMPONENT> - the component executable that was requested (default is just 'gpg')
#
## Result variables
# ^^^^^^^^^^^^^^^^
#
# This module always defines the following variables:
#
# ::
#
# GNUPG_VERSION - version that was found
#
# Depending on components requested, this module will also define variables like:
#
# ::
#
# GPG_EXECUTABLE - path to the gpg executable
# <COMPONENT>_EXECUTABLE - path to the component executable
#
# helper that will call <utility_name> --version and extract the version string
function(_get_gpg_version utility_name exe_path var_prefix)
execute_process(
COMMAND "${exe_path}" --version
OUTPUT_VARIABLE version
RESULT_VARIABLE exit_code
ERROR_QUIET
)
if (NOT exit_code)
string(REGEX MATCH "${utility_name} \\(GnuPG\\) (([0-9]+)\\.([0-9]+)\\.([0-9]+))" version "${version}")
if (CMAKE_MATCH_1)
set(${var_prefix}_VERSION "${CMAKE_MATCH_1}" PARENT_SCOPE)
endif()
endif()
endfunction()
# default to finding gpg
if (NOT GnuPG_FIND_COMPONENTS)
set(GnuPG_FIND_COMPONENTS gpg)
endif()
foreach(_comp IN LISTS GnuPG_FIND_COMPONENTS)
# we also check for an executable with the 2 suffix when appropriate
set(_names "${_comp}")
if (_comp STREQUAL "gpg" OR _comp STREQUAL "gpgv")
if (NOT ${GnuPG_FIND_VERSION})
set(_names "${_comp}2" ${_comp})
elseif (${GnuPG_FIND_VERSION} VERSION_GREATER_EQUAL 2.2)
# 2.2+ defaults to gpg/gpgv, but supports gpg2/gpgv2
set(_names ${_comp} "${_comp}2")
elseif(${GnuPG_FIND_VERSION} VERSION_GREATER_EQUAL 2.0)
# 2.0-2.2 or so used a temporary naming of gpg2/gpgv2
set(_names "${_comp}2" ${_comp})
endif()
endif()
string(TOUPPER "${_comp}" _comp_upper)
find_program(${_comp_upper}_EXECUTABLE NAMES ${_names})
unset(_names)
mark_as_advanced(${_comp_upper}_EXECUTABLE)
# if we found an executable, check the version
if (${_comp_upper}_EXECUTABLE)
_get_gpg_version(${_comp} ${${_comp_upper}_EXECUTABLE} _${_comp})
if (_${_comp}_VERSION)
if (NOT GNUPG_VERSION)
# this is the first component found, so set the version to match
set(GNUPG_VERSION ${_${_comp}_VERSION})
endif()
# see if the version matches the previous components found
if(_${_comp}_VERSION VERSION_EQUAL ${GNUPG_VERSION} AND NOT TARGET GnuPG::${_comp})
add_executable(GnuPG::${_comp} IMPORTED GLOBAL)
set_target_properties(GnuPG::${_comp} PROPERTIES
IMPORTED_LOCATION "${${_comp_upper}_EXECUTABLE}"
)
endif()
endif()
unset(_${_comp}_VERSION)
endif()
# mark our components as found or not found
if (TARGET GnuPG::${_comp})
set(GnuPG_${_comp}_FOUND TRUE)
else()
set(GnuPG_${_comp}_FOUND FALSE)
unset(${_comp_upper}_EXECUTABLE)
endif()
if (GnuPG_FIND_REQUIRED_${_comp})
list(APPEND _GnuPG_REQUIRED_VARS ${_comp_upper}_EXECUTABLE)
endif()
endforeach()
unset(_comp)
unset(_comp_upper)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GnuPG
REQUIRED_VARS ${_GnuPG_REQUIRED_VARS}
VERSION_VAR GNUPG_VERSION
HANDLE_COMPONENTS
)
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