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* tmp-objdir: do not migrate files starting with '.'Jeff King2016-10-10
| | | | | | | | | | This avoids "." and "..", as we already do, but also leaves room for index-pack to store extra data in the quarantine area (e.g., for passing back any analysis to be read by the pre-receive hook). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* tmp-objdir: put quarantine information in the environmentJeff King2016-10-10
| | | | | | | | | The presence of the GIT_QUARANTINE_PATH variable lets any called programs know that they're operating in a temporary object directory (and where that directory is). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* tmp-objdir: introduce API for temporary object directoriesJeff King2016-10-10
Once objects are added to the object database by a process, they cannot easily be deleted, as we don't know what other processes may have started referencing them. We have to clean them up with git-gc, which will apply the usual reachability and grace-period checks. This patch provides an alternative: it helps callers create a temporary directory inside the object directory, and a temporary environment which can be passed to sub-programs to ask them to write there (the original object directory remains accessible as an alternate of the temporary one). See tmp-objdir.h for details on the API. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>