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bitbake: parse: Improve/fix cache invalidation via mtime

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We have been seeing obscure failures in devtool, particularly on newer
autobuilder workers where it appears the cache is assumed to be valid
when it shouldn't be.

We're using the 'seconds' granulation mtime field which is not really
a good way of telling if a file has changed. We can switch to the "ns"
version which is better however also add in inode number and size as
precautions. We already have all this data and tuples are fast so there
isn't really any cost to do so.

This hopefully fixes [YOCTO #15318].

(Bitbake rev: 5a90927f31c4f9fccbe5d9d07d08e6e69485baa8)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d9e5d313c79500e3c70ab9c3239b6b2180194f67)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Richard Purdie 2024-05-16 16:51:09 +01:00 committed by Steve Sakoman
parent e575d02196
commit 2af7a635be
1 changed files with 6 additions and 3 deletions
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9
bitbake/lib/bb/parse/__init__.py
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@ -49,20 +49,23 @@ class SkipPackage(SkipRecipe):
__mtime_cache = {}
def cached_mtime(f):
if f not in __mtime_cache:
__mtime_cache[f] = os.stat(f)[stat.ST_MTIME]
res = os.stat(f)
__mtime_cache[f] = (res.st_mtime_ns, res.st_size, res.st_ino)
return __mtime_cache[f]
def cached_mtime_noerror(f):
if f not in __mtime_cache:
try:
__mtime_cache[f] = os.stat(f)[stat.ST_MTIME]
res = os.stat(f)
__mtime_cache[f] = (res.st_mtime_ns, res.st_size, res.st_ino)
except OSError:
return 0
return __mtime_cache[f]
def update_mtime(f):
try:
__mtime_cache[f] = os.stat(f)[stat.ST_MTIME]
res = os.stat(f)
__mtime_cache[f] = (res.st_mtime_ns, res.st_size, res.st_ino)
except OSError:
if f in __mtime_cache:
del __mtime_cache[f]