[bitbake-devel] [PATCH] bitbake: reset mtime cache before the build

[Ed Bartosh]

Mtime cache is desinged with assumption that files are not
removed. Unfortunately it's not always the case for memory-resident
bitbake as build/tmp can be removed to perform build from scratch.
In this case bitbake crashes when trying to create timestamps if
tmp/stamps/ hierarchy doesn't exist.

Resetting mtime cache should solve this issue.

[YOCTO: #7562]

Signed-off-by: Ed Bartosh <ed.bartosh at linux.intel.com>
---
 bitbake/lib/bb/cooker.py         | 1 +
 bitbake/lib/bb/parse/__init__.py | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index 9c101f2..383bd12 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -1343,6 +1343,7 @@ class BBCooker:
                 return True
             return retval
 
+        parse.reset_cache()
         self.buildSetVars()
 
         taskdata, runlist, fulltargetlist = self.buildTaskData(targets, task, self.configuration.abort)
diff --git a/bitbake/lib/bb/parse/__init__.py b/bitbake/lib/bb/parse/__init__.py
index 25effc2..c0867d4 100644
--- a/bitbake/lib/bb/parse/__init__.py
+++ b/bitbake/lib/bb/parse/__init__.py
@@ -78,6 +78,10 @@ def update_cache(f):
         logger.debug(1, "Updating mtime cache for %s" % f)
         update_mtime(f)
 
+def reset_cache():
+    global __mtime_cache
+    __mtime_cache = {}
+
 def mark_dependency(d, f):
     if f.startswith('./'):
         f = "%s/%s" % (os.getcwd(), f[2:])
-- 
2.1.4