Bug 791422 - gnucash 2.7 no longer opens sqlite3...

as it doesn't load proper backend.
The cause was that the libdbi-driver path in CMakeLists.txt was wrong
and GNC_DBD_DIR was being set unconditionally in etc/gnucash/environment
with an invalid path.

CMakeLists.txt

@@ -389,9 +389,14 @@ ENDIF(NOT LIBXSLT_FOUND)
 SET(PKG_CONFIG_EXECUTABLE ${GNC_PKG_CONFIG_EXE})
 
 # libdbi
-FIND_PATH (LIBDBI_INCLUDE_PATH dbi/dbi.h HINTS ${CMAKE_PREFIX_PATH}/libdbi/include)
-FIND_LIBRARY (LIBDBI_LIBRARY dbi HINTS ${CMAKE_PREFIX_PATH}/libdbi/lib)
-FIND_PATH (LIBDBI_DRIVERS_DIR dbd HINTS ${CMAKE_PREFIX_PATH}/lib ${CMAKE_PREFIX_PATH}/libdbi-drivers/lib)
+FIND_PATH (LIBDBI_INCLUDE_PATH dbi/dbi.h)
+FIND_LIBRARY (LIBDBI_LIBRARY dbi)
+FIND_LIBRARY (LIBDBI_DRIVERS_DIR
+  NAMES dbdmysql dbdpgsql dbdsqlite3 NAMES_PER_DIR
+  PATH_SUFFIXES dbd libdbi-drivers/dbd
+  HINTS LIBDBI_LIBRARY
+  PATHS GNC_DBD_DIR
+  DOC "Libdbi Drivers Directory")
 IF (WITH_SQL)
   IF (NOT LIBDBI_INCLUDE_PATH)
     MESSAGE (SEND_ERROR "Include file <dbi/dbi.h> was not found - did you install libdbi0-dev or libdbi-dev?")
@@ -400,6 +405,12 @@ IF (WITH_SQL)
     MESSAGE (SEND_ERROR "Library libdbi was not found")
   ENDIF (NOT LIBDBI_LIBRARY)
   SET(HAVE_DBI_DBI_H 1)
+  IF (NOT LIBDBI_DRIVERS_DIR)
+    MESSAGE (SEND_ERROR "No libdbi drivers found, SQL tests will fail.")
+  ELSE()
+    get_filename_component(drivers_dir ${LIBDBI_DRIVERS_DIR} DIRECTORY)
+    set(LIBDBI_DRIVERS_DIR ${drivers_dir} CACHE FILEPATH "Directory containing the libdbi driver modules." FORCE)
+  ENDIF()
 ENDIF (WITH_SQL)
 
 # ############################################################

gnucash/CMakeLists.txt

@@ -129,16 +129,18 @@ SET(XDG_TEXT "
 # and gsettings schema are found.\n"
 )
 
-IF (NOT(${GNC_DBD_DIR} STREQUAL "${CMAKE_PREFIX_PATH}/lib/dbd"))
-  FILE(APPEND ${ENV_FILE_OUT} "GNC_DBD_DIR=${GNC_DBD_DIR}")
-ENDIF()
-
 IF (NOT(${CMAKE_INSTALL_FULL_DATADIR} STREQUAL "/usr/share") AND NOT(${CMAKE_INSTALL_FULL_DATADIR} STREQUAL "/usr/local/share"))
   FILE(APPEND ${ENV_FILE_OUT} ${XDG_TEXT})
-  FILE(APPEND ${ENV_FILE_OUT} "XDG_DATA_DIRS=${CMAKE_INSTALL_DATADIR};{XDG_DATA_DIRS};" "${GNC_SYSTEM_XDG_DATA_DIRS}\n")
+  FILE(APPEND ${ENV_FILE_OUT} "XDG_DATA_DIRS=${CMAKE_INSTALL_FULL_DATADIR};{XDG_DATA_DIRS};" "${GNC_SYSTEM_XDG_DATA_DIRS}\n")
 ENDIF()
 
-FILE(APPEND ${BUILD_ENV_FILE_OUT} "GNC_DBD_DIR=${LIBDBI_DRIVERS_DIR}/dbd")
+if (LIBDBI_LIBRARY AND LIBDBI_DRIVERS_DIR)
+  get_filename_component(libdir ${LIBDBI_LIBRARY} DIRECTORY)
+  string(FIND ${LIBDBI_DRIVERS_DIR} ${libdir} is_subdir)
+  if (NOT is_subdir EQUAL 0)
+    FILE(APPEND ${BUILD_ENV_FILE_OUT} "GNC_DBD_DIR=${LIBDBI_DRIVERS_DIR}")
+  endif()
+ENDIF()
 
 FILE(APPEND ${BUILD_ENV_FILE_OUT} ${XDG_TEXT})
 FILE(APPEND ${BUILD_ENV_FILE_OUT} "XDG_DATA_DIRS=${DATADIR_BUILD};{XDG_DATA_DIRS};" "${GNC_SYSTEM_XDG_DATA_DIRS}\n")