copies: use node.nullrev instead of literal -1 Differential Revision: https://phab.mercurial-scm.org/D5593

copies: use node.wdirrev instead of inventing another constant for it Differential Revision: https://phab.mercurial-scm.org/D5592

narrow: extract repo property for store narrowmatcher When a repo lock is released, we try to persist the manifest cache. That involves getting the narrowmatcher for the manifestlog. That should not fail if the store and working copy narrowspecs are out of sync. Without this patch, the later patches in this series will fail because of that. Differential Revision: https://phab.mercurial-scm.org/D5508

narrow: copy store narrowspec to working copy immediately We no longer need to delay it until the end of the transaction since we now restore a backup if the transaction aborts. Differential Revision: https://phab.mercurial-scm.org/D5506

narrow: include working copy narrowspec in transaction journal Now that we have separate narrowspecs for the store and the working copy, we need to include both in the transaction journal. Differential Revision: https://phab.mercurial-scm.org/D5505

narrow: make dirstateguard back up and restore working copy narrowspec instead We used to have only one narrowspec for the store and the working copy, but now that we have one narrowspec for each, it seems clear that the dirstateguard was supposed to back up and restore the narrowspec associated with the working copy, not the one associated with the store. clearbackup() (for the store narrowspec) is not needed because the presence of the file in localrepository._journalfiles() takes care of that. Differential Revision: https://phab.mercurial-scm.org/D5504