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authorMark Hatle <mark.hatle@windriver.com>2019-03-27 13:40:42 -0400
committerRichard Purdie <richard.purdie@linuxfoundation.org>2019-04-01 14:48:44 +0100
commit2030e815bb1ba932c58b0c9318f97602fdd4edfb (patch)
tree6f663fd10f059f1ba8bef331ea291ac7d68b78c8 /meta-yocto-bsp/conf
parent24fa03eae68bef9e2146e8ec5b9aed2324cabeb2 (diff)
downloadpoky-2030e815bb1ba932c58b0c9318f97602fdd4edfb.tar.gz
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 <wak@google.com>. The included test case was also written by him, and included unmodified. (Bitbake rev: 30fe86d22c239afa75168cc5eb262b880886ef8a) Signed-off-by: Mark Hatle <mark.hatle@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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