From 2030e815bb1ba932c58b0c9318f97602fdd4edfb Mon Sep 17 00:00:00 2001 From: Mark Hatle Date: Wed, 27 Mar 2019 13:40:42 -0400 Subject: bitbake: gitsm: Add need_update method to determine when we are going to a new SRCREV If the system had previously fetched a source repository for use by gitsm, and then the SRCREV was updated and the new commit already existed, the system would not re-evaluate the submodules and update them accordingly. The cause of this issue was that need_update was being used, unmodified, from the base git fetcher. It did not have any knowledge, nor did it care if we were moving commits and needed to re-evaluate what was happening due to this switch. To fix the issue, during the download process we add all processed (by gitsm) srcrevs to the git config file, as bitbake.srcrev. This allows us to use a new need_update function that not only checks if the git commit is present, but if we have previously processed this commit to ensure all of the submodule components are also present. This approach is used, instead of iterating over the submodules in need_update to avoid a potential race condition that has affected us in the past. The need_update is called only with the parent locking. Any time we need to dive into the submodules, we need to lock, and unlock them, at each stage. This opens the possibility of errors in either the code, or unintended race conditions with rm_work. This issue was discovered by William A. Kennington III . The included test case was also written by him, and included unmodified. (Bitbake rev: 30fe86d22c239afa75168cc5eb262b880886ef8a) Signed-off-by: Mark Hatle Signed-off-by: Richard Purdie --- bitbake/lib/bb/fetch2/gitsm.py | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'bitbake/lib/bb/fetch2') diff --git a/bitbake/lib/bb/fetch2/gitsm.py b/bitbake/lib/bb/fetch2/gitsm.py index b21fed2669..32389130bd 100644 --- a/bitbake/lib/bb/fetch2/gitsm.py +++ b/bitbake/lib/bb/fetch2/gitsm.py @@ -147,6 +147,23 @@ class GitSM(Git): return submodules != [] + def need_update(self, ud, d): + if Git.need_update(self, ud, d): + return True + + try: + # Check for the nugget dropped by the download operation + known_srcrevs = runfetchcmd("%s config --get-all bitbake.srcrev" % \ + (ud.basecmd), d, workdir=ud.clonedir) + + if ud.revisions[ud.names[0]] not in known_srcrevs.split(): + return True + except bb.fetch2.FetchError: + # No srcrev nuggets, so this is new and needs to be updated + return True + + return False + def download(self, ud, d): def download_submodule(ud, url, module, modpath, d): url += ";bareclone=1;nobranch=1" @@ -157,6 +174,9 @@ class GitSM(Git): try: newfetch = Fetch([url], d, cache=False) newfetch.download() + # Drop a nugget to add each of the srcrevs we've fetched (used by need_update) + runfetchcmd("%s config --add bitbake.srcrev %s" % \ + (ud.basecmd, ud.revisions[ud.names[0]]), d, workdir=ud.clonedir) except Exception as e: logger.error('gitsm: submodule download failed: %s %s' % (type(e).__name__, str(e))) raise -- cgit v1.2.3-54-g00ecf