augeas: fix prefix for non-default installations

as discussed in #1187

cmake/Modules/FindAugeas.cmake

@@ -7,6 +7,8 @@
 #
 # Distributed under the BSD license. See COPYING-CMAKE-SCRIPTS for details.
 
+include (LibFindMacros)
+
 if (LIBAUGEAS_INCLUDE_DIR)
   # in cache already
   set (LIBAUGEAS_FOUND TRUE)
@@ -25,6 +27,12 @@ else (LIBAUGEAS_INCLUDE_DIR)
     /usr/local/include
   )
 
+  pkg_get_variable(_LIBAUGEAS_PREFIX augeas prefix)
+  if (NOT _LIBAUGEAS_PREFIX)
+    set (_LIBAUGEAS_PREFIX "/usr")
+  endif ()
+  set(LIBAUGEAS_PREFIX "${_LIBAUGEAS_PREFIX}" CACHE INTERNAL "prefix path of libaugeas" FORCE)
+
   find_library (LIBAUGEAS_LIBRARIES NAMES augeas
     PATHS
     ${_LIBAUGEAS_PC_LIBDIR}
@@ -44,6 +52,6 @@ else (LIBAUGEAS_INCLUDE_DIR)
     endif (LIBAUGEAS_FIND_REQUIRED)
   endif (LIBAUGEAS_FOUND)
 
-  mark_as_advanced(LIBAUGEAS_INCLUDE_DIR LIBAUGEAS_LIBRARIES)
+  mark_as_advanced(LIBAUGEAS_INCLUDE_DIR LIBAUGEAS_LIBRARIES _LIBAUGEAS_PREFIX)
 
 endif (LIBAUGEAS_INCLUDE_DIR)

src/plugins/augeas/CMakeLists.txt

@@ -2,6 +2,8 @@ if (DEPENDENCY_PHASE)
 	find_package (Augeas)
 	find_package (LibXml2)
 
+	set (LIBAUGEAS_COMPILE_DEFINITIONS LIBAUGEAS_PREFIX="${LIBAUGEAS_PREFIX}")
+
 	if (LIBAUGEAS_FOUND AND LIBXML2_FOUND)
 		try_compile (HAS_LIBAUGEAS16
 			"${CMAKE_BINARY_DIR}"
@@ -28,6 +30,8 @@ add_plugin(augeas
 	INCLUDE_DIRECTORIES
 		${LIBAUGEAS_INCLUDE_DIR}
 		${LIBXML2_INCLUDE_DIR}
+	COMPILE_DEFINITIONS
+		"${LIBAUGEAS_COMPILE_DEFINITIONS}"
 	LINK_ELEKTRA
 		elektra-meta
 		elektra-proposal

src/plugins/augeas/augeas.c

@@ -76,7 +76,7 @@ int elektraAugeasGenConf (KeySet * ks, Key * errorKey ELEKTRA_UNUSED)
 {
 	glob_t pglob;
 	int retval = 1;
-	const char * f = "/usr/share/augeas/lenses/dist/*.aug";
+	const char * f = LIBAUGEAS_PREFIX "/share/augeas/lenses/dist/*.aug";
 	if (glob (f, GLOB_NOSORT, NULL, &pglob) == 0)
 	{
 		ELEKTRA_LOG ("has glob %zd", pglob.gl_pathc);