BUILD(cmake): Revamp install paths

Installation paths can now be fine-tuned by setting the respective
MUMBLE_INSTALLATION_* variables when invoking cmake.

Additionally some components that only had install rules for a certain
OS are now installed on all OSes as these components should be needed
there as well.

2 files changed, 72 insertions, 5 deletions

diff --git a/cmake/install-paths.cmake b/cmake/install-paths.cmake
new file mode 100644
index 000000000..ee423917e
--- /dev/null
+++ b/cmake/install-paths.cmake
@@ -0,0 +1,69 @@
+# Copyright 2020 The Mumble Developers. All rights reserved.
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file at the root of the
+# Mumble source tree or at <https://www.mumble.info/LICENSE>.
+
+include(GNUInstallDirs)
+
+if(UNIX)
+	if(APPLE)
+		set(EXECUTABLEDIR_DEFAULT ".")
+		set(LIBDIR_DEFAULT "${CMAKE_INSTALL_LIBDIR}/mumble")
+		set(PLUGINDIR_DEFAULT "${CMAKE_INSTALL_LIBDIR}/mumble/plugins")
+		set(SCRIPTDIR_DEFAULT "${CMAKE_INSTALL_BINDIR}")
+		set(MANDIR_DEFAULT "${CMAKE_INSTALL_MANDIR}/man1")
+		set(DOCDIR_DEFAULT "${CMAKE_INSTALL_DOCDIR}")
+		set(LICENSEDIR_DEFAULT "${EXECUTABLEDIR_DEFAULT}/licenses")
+	else()
+		set(EXECUTABLEDIR_DEFAULT "bin")
+		set(LIBDIR_DEFAULT "${CMAKE_INSTALL_LIBDIR}/mumble")
+		set(PLUGINDIR_DEFAULT "${CMAKE_INSTALL_LIBDIR}/mumble/plugins")
+		set(SCRIPTDIR_DEFAULT "${CMAKE_INSTALL_BINDIR}")
+		set(MANDIR_DEFAULT "${CMAKE_INSTALL_MANDIR}/man1")
+		set(DOCDIR_DEFAULT "${CMAKE_INSTALL_DOCDIR}")
+		set(LICENSEDIR_DEFAULT "${EXECUTABLEDIR_DEFAULT}/licenses")
+	endif()
+else()
+	set(EXECUTABLEDIR_DEFAULT ".")
+	# In order for the installer to produce a working version of Mumble, this
+	# path must not be changed.
+	set(LIBDIR_DEFAULT ".")
+	set(PLUGINDIR_DEFAULT "./plugins")
+	set(SCRIPTDIR_DEFAULT "./scripts")
+	set(MANDIR_DEFAULT "./man1")
+	set(DOCDIR_DEFAULT "./docs")
+		set(LICENSEDIR_DEFAULT "${EXECUTABLEDIR_DEFAULT}/licenses")
+endif()
+
+set(MUMBLE_INSTALL_EXECUTABLEDIR "${EXECUTABLEDIR_DEFAULT}" CACHE PATH "The directory to install the main executable(s) into")
+set(MUMBLE_INSTALL_LIBDIR "${LIBDIR_DEFAULT}" CACHE PATH "The directory to install the built libraries into")
+set(MUMBLE_INSTALL_PLUGINDIR "${PLUGINDIR_DEFAULT}" CACHE PATH "The directory to install the built plugins into")
+set(MUMBLE_INSTALL_SCRIPTDIR "${SCRIPTDIR_DEFAULT}" CACHE PATH "The directory to install any additional scripts into")
+set(MUMBLE_INSTALL_MANDIR "${MANDIR_DEFAULT}" CACHE PATH "The directory to install man files into")
+set(MUMBLE_INSTALL_DOCDIR "${DOCDIR_DEFAULT}" CACHE PATH "The directory to install documentation files into")
+set(MUMBLE_INSTALL_LICENSEDIR "${LICENSEDIR_DEFAULT}" CACHE PATH "The directory to install license files into")
+
+option(display-install-paths OFF)
+
+if(display-install-paths)
+	# Turn into absolute paths by prepending the install-prefix (unless they are absolute paths already)
+	# We only do that for printing the paths as using absolute install paths prevents CPack from working and
+	# therefore prevents us from being able to build the installer.
+	get_filename_component(EXECUTABLEDIR_ABS "${MUMBLE_INSTALL_EXECUTABLEDIR}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+	get_filename_component(LIBDIR_ABS "${MUMBLE_INSTALL_LIBDIR}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+	get_filename_component(PLUGINDIR_ABS "${MUMBLE_INSTALL_PLUGINDIR}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+	get_filename_component(SCRIPTDIR_ABS "${MUMBLE_INSTALL_SCRIPTDIR}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+	get_filename_component(MANDIR_ABS "${MUMBLE_INSTALL_MANDIR}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+	get_filename_component(DOCDIR_ABS "${MUMBLE_INSTALL_DOCDIR}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+	get_filename_component(LICENSEDIR_ABS "${MUMBLE_INSTALL_LICENSEDIR}" ABSOLUTE BASE_DIR "${CMAKE_INSTALL_PREFIX}")
+
+	message(STATUS "These are the paths the different components will be installed to:")
+	message(STATUS "Executables:    \"${EXECUTABLEDIR_ABS}\"")
+	message(STATUS "Libraries:      \"${LIBDIR_ABS}\"")
+	message(STATUS "Plugins:        \"${PLUGINDIR_ABS}\"")
+	message(STATUS "Scripts:        \"${SCRIPTDIR_ABS}\"")
+	message(STATUS "Man-files:      \"${MANDIR_ABS}\"")
+	message(STATUS "Documentation:  \"${DOCDIR_ABS}\"")
+	message(STATUS "Licenses:       \"${LICENSEDIR_ABS}\"")
+endif()
+
diff --git a/cmake/packaging.cmake b/cmake/packaging.cmake
index 06a8baaf0..4b2f8ad4d 100644
--- a/cmake/packaging.cmake
+++ b/cmake/packaging.cmake
@@ -44,7 +44,7 @@ if(client)
 		"${CMAKE_SOURCE_DIR}/installer/gpl.txt"
 		"${CMAKE_SOURCE_DIR}/installer/qt.txt"
 		"${CMAKE_SOURCE_DIR}/installer/speex.txt"
-		DESTINATION "."
+		DESTINATION "${MUMBLE_INSTALL_LICENSEDIR}"
 		COMPONENT mumble_client
 	)
 endif()
@@ -67,7 +67,7 @@ if(server)
 			"${CMAKE_SOURCE_DIR}/CHANGES"
 			"${CMAKE_SOURCE_DIR}/installer/gpl.txt"
 			"${CMAKE_SOURCE_DIR}/installer/qt.txt"
-			DESTINATION "."
+			DESTINATION "${MUMBLE_INSTALL_LICENSEDIR}"
 			COMPONENT mumble_server
 		)
 	endif()
@@ -77,9 +77,7 @@ if(server)
 	set(CPACK_COMPONENT_MUMBLE_SERVER_DESCRIPTION "The Mumble VoIP Server")
 	#set(CPACK_WIX_PATCH_FILE "${CMAKE_SOURCE_DIR}/installer/server-shortcuts.xml")
 
-	if(WIN32)
-		install(FILES "${CMAKE_SOURCE_DIR}/scripts/murmur.ini" DESTINATION "." COMPONENT mumble_server)
-	endif()
+	install(FILES "${CMAKE_SOURCE_DIR}/scripts/murmur.ini" DESTINATION "${MUMBLE_INSTALL_EXECUTABLEDIR}" COMPONENT mumble_server)
 endif()
 
 if(client AND server)