Mercurial > hg
view Makefile @ 26520:46dec89fe888
bookmarks: use recordchange instead of writing if transaction is active
Before this patch, 'bmstore.write()' always write in-memory bookmark
changes into '.hg/bookmarks' regardless of transaction activity.
If 'bmstore.write()' is invoked inside a transaction and it writes
changes into '.hg/bookmarks', then:
- original bookmarks aren't restored at failure of that transaction
This breaks "all or nothing" policy of the transaction.
BTW, "hg rollback" can restore bookmarks successfully even before
this patch, because original bookmarks are saved into
'.hg/journal.bookmarks' at the beginning of the transaction, and
it (actually renamed as '.hg/undo.bookmarks') is used by "hg
rollback".
- uncommitted bookmark changes are visible to other processes
This is a kind of "dirty read"
For example, 'rebase.rebase()' implies 'bmstore.write()', and it may
be executed inside the transaction of "hg unshelve". Then, intentional
aborting at the end of "hg unshelve" transaction doesn't restore
original bookmarks (this is obviously a bug).
This patch uses 'bmstore.recordchange()' instead of actual writing by
'bmstore._writerepo()', if any transaction is active
This patch also removes meaningless restoring bmstore explicitly at
the end of "hg shelve".
This patch doesn't choose fixing each 'bmstore.write()' callers as
like below, because writing similar code here and there is very
redundant.
before:
bmstore.write()
after:
tr = repo.currenttransaction()
if tr:
bmstore.recordchange(tr)
else:
bmstore.write()
Even though 'bmstore.write()' itself may have to be discarded by
putting bookmark operations into transaction scope, this patch chose
fixing it to implement "transactional dirstate" at first.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
---|---|
date | Thu, 08 Oct 2015 01:41:30 +0900 |
parents | 05306b9359d3 |
children | c5c7c686d6a6 |
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# If you want to change PREFIX, do not just edit it below. The changed # value wont get passed on to recursive make calls. You should instead # override the variable on the command like: # # % make PREFIX=/opt/ install PREFIX=/usr/local export PREFIX PYTHON=python $(eval HGROOT := $(shell pwd)) HGPYTHONS ?= $(HGROOT)/build/pythons PURE= PYFILES:=$(shell find mercurial hgext doc -name '*.py') DOCFILES=mercurial/help/*.txt export LANGUAGE=C export LC_ALL=C TESTFLAGS ?= $(shell echo $$HGTESTFLAGS) # Set this to e.g. "mingw32" to use a non-default compiler. 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