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Commit 1d23bf6c authored by Katsunori FUJIWARA's avatar Katsunori FUJIWARA
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shelve: restore shelved dirstate explicitly after aborting transaction

Before this patch, "hg shelve" uses aborting a current transaction to
discard temporary changes while shelving.

This assumes that dirstate changes in a transaction scope are kept
even after aborting it. But this assumption will be broken by
"transactional dirstate". See the wiki page below for detail about it.

    https://mercurial.selenic.com/wiki/DirstateTransactionPlan

This patch explicitly saves shelved dirstate just before aborting
current transaction, and restore dirstate with it after aborting by
utility function '_aborttransaction()' added by previous patch.

This patch replaces 'if tr: tr.abort()' by 'lockmod.release(tr)',
because the former is already done in '_aborttransaction()' (and the
latter has no effect), if current transaction is aborted in it
successfully. Otherwise, the latter is enough to trigger aborting.
parent 10f14bb2
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