largefiles: add test for large/normal conflict at linear merging Before this patch, there is no explicit test for it: test-issue3084.t seems to test such conflict only at branch merging. This patch uses "[debug] dirstate.delaywrite" feature for the tests expecting "M" status of largefiles, to confirm certainly whether files are marked unexpectedly as "clean".

largefiles: put whole "hgmerge" process into the same "wlock" scope Before this patch, there are two distinct "wlock" scopes below in "hgmerge": 1. "merge.update" via original "hg.merge" function 2. "updatelfiles" specific "wlock" scope (to synchronize largefile dirstate) But these should be executed in the same "wlock" scope for consistency, because users of "hg.merge" don't get "wlock" explicitly before invocation of it. - merge in commands This patch puts almost all of the original "hgmerge" implementation into "_hgmerge" to reduce changes.

largefiles: put whole "hgupdaterepo" process into the same "wlock" scope Before this patch, there are two distinct "wlock" scopes below in "hgupdaterepo": 1. "merge.update" via original "hg.updaterepo" function 2. "updatelfiles" specific "wlock" scope (to synchronize largefile dirstate) In addition to them, "dirstate.walk" is executed between these "wlock" scopes. But these should be executed in the same "wlock" scope for consistency, because many (indirect) users of "hg.updaterepo" don't get "wlock" explicitly before invocation of it. "hg.clean" is invoked without "wlock" from: - mqrepo.restore in mq - bisect in commands - update in commands "hg.update" is invoked without "wlock" from: - clone in mq - pullrebase in rebase - postincoming in commands (used in "hg pull -u", "hg unbundle") - update in commands This patch puts almost all original "hgupdaterepo" implementation into "_hgupdaterepo" to reduce changes.

annotate: inline definition of decorate() functions

annotate: rewrite long short-circuit statement by if-elif-else

revert: use modified information from both statuses Using status information against the target ensures we are catching all files with modifications that need reverting. We still need to distinguish fresh modifications for backup purpose. test-largefile is affected because it reverted a file that needs no content change.

revert: drop special case handling for file unknown in parent We had a special case for file not caught by any categories. It was aimed at files missing in wc and wc's parent but existing in the target revision. This is now properly handled using status information.

revert: use "remove" information from both statuses Using status information against the target to make sure we are catching all files that need to be re-added. We still need to distinguish fresh removal because they use a different message.

revert: process removed files missing in target as clean If a file does not exist in target and is marked as removed in the dirstate, we can mark it as clean. There are no changes needed to revert it.

revert: also track clean files Tracking clean files is the simplest way to be able to reports files that need no changes. So we explicitly retrieve them. This fixes a couple of test outputs where the lack of changes was not reported.