T39690: Modifications to Blender's 'temp dir' system.

Current temporary data of Blender suffers one major issue - default 'temp' dir on Windows is never
automatically cleaned up, and can end being quite big when used by Blender, especially when we have
to store per-process data (using getpid() in file names).

To address this, this patch:
* Divides tempdir paths in two, one for 'base' temp dir (the same as previous unique tempdir path),
  the other is a mkdtemp-generated sub-dir, specific to each Blender instance.
* Only uses base tempdir when we need some shallow persistance accross Blender sessions - and we always
  reuse the same filename (quit.blend...) or generate small file (crash reports...).
* Uses temp sub-dir for heavy files like pointcache or renderEXRs (Save Buffer option).
* Erases temp sub-dir on quit or crash.

To get this working it also adds a working 'recursive delete' to BLI_delete() under Windows.

Note that, as in current code, the 'recover render result' hack-feature that was possible
with SaveBuffer option is still removed. A real renderresult cache feature will be added
soon, though.

Reviewers: campbellbarton, brecht, sergey

Reviewed By: campbellbarton, sergey

CC: sergey

Differential Revision: https://developer.blender.org/D531

1 files changed, 3 insertions, 1 deletions

diff --git a/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp b/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp
index 31fafd86db7..b6456b105c8 100644
--- a/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp
+++ b/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp
@@ -430,7 +430,7 @@ int main(int argc, char** argv)
 #endif /* __alpha__ */
 #endif /* __linux__ */
 	BLI_init_program_path(argv[0]);
-	BLI_init_temporary_dir(NULL);
+	BLI_temp_dir_init(NULL);
 	
 	// We don't use threads directly in the BGE, but we need to call this so things like
 	// freeing up GPU_Textures works correctly.
@@ -1142,5 +1142,7 @@ int main(int argc, char** argv)
 		MEM_printmemlist();
 	}
 
+	BLI_temp_dir_session_purge();
+
 	return error ? -1 : 0;
 }