[evolution-mapi] CMake: Add FORCE_INSTALL_PREFIX compile time option

[Milan Crha <mcrha src gnome org>]

commit c1a4f42ebd5a2befc8070a9af9cd077ad5e439a6
Author: Milan Crha <mcrha redhat com>
Date:   Wed Feb 24 18:10:51 2021 +0100

    CMake: Add FORCE_INSTALL_PREFIX compile time option
    
    This allows to install evolution-data-server and evolution files
    files into the CMAKE_INSTALL_PREFIX instead of the prefix advertised
    by respective pkg-config files. It's useful, when the eds/evo prefixes
    are not writable for the builder.
    
    Also use EBookMetaBackendClass::backend_module_directory, which is
    closely related to this new option.

 CMakeLists.txt                        | 18 ++++++++++++++++--
 src/addressbook/e-book-backend-mapi.c |  1 +
 2 files changed, 17 insertions(+), 2 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 81bb97b..97fa542 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -172,16 +172,30 @@ unset(CMAKE_REQUIRED_LIBRARIES)
 
 set(privlibdir "${LIB_INSTALL_DIR}/${PROJECT_NAME}")
 
-pkg_check_variable(errordir evolution-shell-3.0 errordir)
-pkg_check_variable(evo_privlibdir evolution-shell-3.0 privlibdir)
 pkg_check_variable(camel_providerdir camel-1.2 camel_providerdir)
 pkg_check_variable(ebook_backenddir libedata-book-1.2 backenddir)
 pkg_check_variable(ecal_backenddir libedata-cal-2.0 backenddir)
 pkg_check_variable(eds_moduledir libebackend-1.2 moduledir)
+pkg_check_variable(evo_privlibdir evolution-shell-3.0 privlibdir)
+pkg_check_variable(errordir evolution-shell-3.0 errordir)
 pkg_check_variable(evo_moduledir evolution-shell-3.0 moduledir)
 pkg_check_variable(mapidatadir evolution-data-server-1.2 privdatadir)
 pkg_check_variable(libmapi_ldif_dir libmapi datadir)
 
+add_printable_variable(FORCE_INSTALL_PREFIX "Whether to force install evolution-data-server and evolution 
files into the install prefix" OFF)
+if(FORCE_INSTALL_PREFIX)
+       pkg_check_variable(eds_prefix evolution-data-server-1.2 prefix)
+       string(REGEX REPLACE "^${eds_prefix}" "${CMAKE_INSTALL_PREFIX}" camel_providerdir 
"${camel_providerdir}")
+       string(REGEX REPLACE "^${eds_prefix}" "${CMAKE_INSTALL_PREFIX}" ebook_backenddir 
"${ebook_backenddir}")
+       string(REGEX REPLACE "^${eds_prefix}" "${CMAKE_INSTALL_PREFIX}" ecal_backenddir "${ecal_backenddir}")
+       string(REGEX REPLACE "^${eds_prefix}" "${CMAKE_INSTALL_PREFIX}" eds_moduledir "${eds_moduledir}")
+       string(REGEX REPLACE "^${eds_prefix}" "${CMAKE_INSTALL_PREFIX}" mapidatadir "${mapidatadir}")
+
+       pkg_check_variable(evo_prefix evolution-shell-3.0 prefix)
+       string(REGEX REPLACE "^${evo_prefix}" "${CMAKE_INSTALL_PREFIX}" errordir "${errordir}")
+       string(REGEX REPLACE "^${evo_prefix}" "${CMAKE_INSTALL_PREFIX}" evo_moduledir "${evo_moduledir}")
+endif(FORCE_INSTALL_PREFIX)
+
 set(mapidatadir "${mapidatadir}/mapi")
 set(libmapi_ldif_dir "${libmapi_ldif_dir}/setup")
 
diff --git a/src/addressbook/e-book-backend-mapi.c b/src/addressbook/e-book-backend-mapi.c
index c924ca2..bf5e034 100644
--- a/src/addressbook/e-book-backend-mapi.c
+++ b/src/addressbook/e-book-backend-mapi.c
@@ -1139,6 +1139,7 @@ e_book_backend_mapi_class_init (EBookBackendMAPIClass *klass)
        EBookMetaBackendClass *meta_backend_class;
 
        meta_backend_class = E_BOOK_META_BACKEND_CLASS (klass);
+       meta_backend_class->backend_module_directory = BACKENDDIR;
        meta_backend_class->backend_module_filename = "libebookbackendmapi.so";
        meta_backend_class->connect_sync = ebb_mapi_connect_sync;
        meta_backend_class->disconnect_sync = ebb_mapi_disconnect_sync;