build: Add daemon submodule and optionally use it.

This allows invoking cmake with -DWITH_DAEMON_SUBMODULE=true to use
the daemon header files and library from the submodule.  Note that it
is currently still necessary to build the daemon separately first,
either manually or using the build.py convenience script.

The goal is to eventually add support for building the daemon with
CMake in the future, so that we could add_subdirectory(${DAEMON_DIR})
in client-qt's CMakeLists.txt and have CMake take care of everything.

Change-Id: I3a16c44837e6c79616b3101fea8a6ff3defa3ab5

.gitmodules

@@ -11,3 +11,6 @@
 	url = https://github.com/atraczyk/SortFilterProxyModel.git
 	branch = qt-6
 	ignore = dirty
+[submodule "daemon"]
+	path = daemon
+	url = https://review.jami.net/jami-daemon

CMakeLists.txt

@@ -39,6 +39,8 @@ set(CMAKE_AUTOUIC ON)
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 # Main project directories:
+# daemon
+set(DAEMON_DIR ${PROJECT_SOURCE_DIR}/daemon)
 # src
 set(LIBCLIENT_SRC_DIR ${PROJECT_SOURCE_DIR}/src/libclient)
 set(APP_SRC_DIR ${PROJECT_SOURCE_DIR}/src/app)
@@ -102,6 +104,16 @@ set(CMAKE_CXX_FLAGS
 set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)
 
 # jami-daemon
+if(NOT DEFINED WITH_DAEMON_SUBMODULE)
+  set(WITH_DAEMON_SUBMODULE false)
+endif()
+if (WITH_DAEMON_SUBMODULE AND NOT EXISTS ${DAEMON_DIR}/src)
+  message(FATAL_ERROR
+    "Jami Daemon sources not found in ${DAEMON_DIR}/src.  If you \
+cloned this repository via git, perhaps you did not initialize its \
+submodules afterwards.  You can do so by running \"git submodule \
+update --init\" in the repository.")
+endif()
 set(CMAKE_MODULE_PATH
   ${CMAKE_MODULE_PATH} "${EXTRAS_DIR}/build/cmake/modules")
 find_package(LibJami REQUIRED)

daemon @ 8abb7a04

+Subproject commit 8abb7a04dcd08078662b95a26bf4dd5e15f1a2f2

extras/build/cmake/modules/FindLibJami.cmake

@@ -26,6 +26,9 @@
 
 set(LIBJAMI_FOUND true)
 
+if(WITH_DAEMON_SUBMODULE)
+  set(LIBJAMI_INCLUDE_DIRS ${DAEMON_DIR}/src/jami)
+else()
   if(EXISTS ${LIBJAMI_INCLUDE_DIR}/jami.h)
     set(LIBJAMI_INCLUDE_DIRS ${LIBJAMI_INCLUDE_DIR})
   elseif(EXISTS ${LIBJAMI_BUILD_DIR}/jami/jami.h)
@@ -41,12 +44,18 @@ else()
 Set -DLIBJAMI_BUILD_DIR or -DCMAKE_INSTALL_PREFIX")
     set(LIBJAMI_FOUND false)
   endif()
+endif()
 
 # Save the current value of CMAKE_FIND_LIBRARY_SUFFIXES.
 set(CMAKE_FIND_LIBRARY_SUFFIXES_orig ${CMAKE_FIND_LIBRARY_SUFFIXES})
 
 set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib;.so;.dll")
 
+if(WITH_DAEMON_SUBMODULE)
+  find_library(LIBJAMI_LIB NAMES jami ring
+    PATHS ${DAEMON_DIR}/src/.libs
+    NO_DEFAULT_PATH)
+else()
   # Search only in these given PATHS.
   find_library(LIBJAMI_LIB NAMES jami ring
     PATHS ${LIBJAMI_BUILD_DIR}/.libs
@@ -60,11 +69,17 @@ find_library(LIBJAMI_LIB NAMES jami ring
   if(NOT LIBJAMI_LIB)
     find_library(LIBJAMI_LIB NAMES jami ring)
   endif()
+endif()
 
 # Try for a static version also.
 if(NOT LIBJAMI_LIB)
   set(CMAKE_FIND_LIBRARY_SUFFIXES ".a;.lib")
 
+  if(WITH_DAEMON_SUBMODULE)
+    find_library(LIBJAMI_LIB NAMES jami ring
+      PATHS ${DAEMON_DIR}/src/.libs
+      NO_DEFAULT_PATH)
+  else()
     # Search only in these given PATHS.
     find_library(LIBJAMI_LIB NAMES jami ring
       PATHS ${LIBJAMI_BUILD_DIR}/.libs
@@ -82,6 +97,7 @@ if(NOT LIBJAMI_LIB)
       add_definitions(-fPIC)
     endif()
   endif()
+endif()
 
 # Restore the original value of CMAKE_FIND_LIBRARY_SUFFIXES.
 set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES_orig})