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Diffstat (limited to 'cmake/Modules/FindGnuPG.cmake')
| -rw-r--r-- | cmake/Modules/FindGnuPG.cmake | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/cmake/Modules/FindGnuPG.cmake b/cmake/Modules/FindGnuPG.cmake new file mode 100644 index 0000000..ed92027 --- /dev/null +++ b/cmake/Modules/FindGnuPG.cmake @@ -0,0 +1,137 @@ +# 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 +) + |