Merge pull request #56 from lxqt/add-find-xdg-screensaver

Adds a FindXdgScreensaver CMake module

cmake/find-modules/FindXdgScreensaver.cmake

@@ -0,0 +1,98 @@
+#.rst:
+# FindXdgScreensaver
+# ------------
+#
+# Try to find the xdg-screensaver executable
+#
+# This will define the following variables:
+#
+# ``XdgScreensaver_FOUND``
+#     True if (the requested version of) XdgScreensaver is available
+#
+# ``XdgScreensaver_VERSION``
+#     The version of XdgScreensaver
+#
+# ``XdgScreensaver_EXECUTABLE``
+#     The xdg-screensaver executable
+#
+# If ``XdgScreensaver_FOUND`` is TRUE, it will also define the following imported
+# target:
+#
+# ``XdgScreensaver::XdgScreensaver``
+#     The xdg-screensaver executable
+#
+#
+#=============================================================================
+# Copyright (c) 2020, Luís Pereira <[email protected]>
+# 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.
+#
+# 3. Neither the name of the copyright holder nor the names of its
+#    contributors may be used to endorse or promote products derived from
+#    this software without specific prior written permission.
+#
+# 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 HOLDER 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.
+#=============================================================================
+
+include(FindPackageHandleStandardArgs)
+
+set(_xdgscreensaver_REQUIRED_VARS)
+
+set(_xdgscreensaver_QUIET)
+if (XdgScreensaver_FIND_QUIETLY)
+    set(_xdgscreensaver_QUIET QUIET)
+endif()
+
+set(_xdgscreensaver_REQUIRED)
+if (XdgScreensaver_FIND_REQUIRED)
+        set(_xdgscreensaver_REQUIRED REQUIRED)
+endif()
+
+find_program(XdgScreensaver_EXECUTABLE NAMES xdg-screensaver)
+
+if (XdgScreensaver_EXECUTABLE)
+    execute_process(COMMAND ${XdgScreensaver_EXECUTABLE} --version
+        OUTPUT_VARIABLE _xdgscreensaver_version
+        ERROR_QUIET
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+endif()
+
+string(REGEX REPLACE "xdg-screensaver ([0-9]\\.[0-9]\\.[0-9]+).*"
+    "\\1" XdgScreensaver_VERSION_STRING "${_xdgscreensaver_version}")
+
+if (XdgScreensaver_FIND_REQUIRED)
+    list(APPEND _xdgscreensaver_REQUIRED_VARS ${XdgScreensaver_EXECUTABLE})
+endif()
+
+find_package_handle_standard_args(XdgScreensaver
+    REQUIRED_VARS _xdgscreensaver_REQUIRED_VARS
+    VERSION_VAR XdgScreensaver_VERSION_STRING
+)
+
+if (XdgScreensaver_FOUND AND NOT TARGET XdgScreensaver::XdgScreensaver)
+    add_executable(XdgScreensaver::XdgScreensaver IMPORTED)
+    set_target_properties(XdgScreensaver::XdgScreensaver PROPERTIES
+        IMPORTED_LOCATION "${XdgScreensaver_EXECUTABLE}"
+    )
+endif()
+
+mark_as_advanced(XdgScreensaver_EXECUTABLE)