log: resolve --follow thoroughly in getlogrevs() This makes sense because --follow isn't really an option to filter revisions, but an option to extend revisions to be filtered. _fileancestors() is a minimal copy of revset._follow(). They are slightly different in that which revision the matcher sees. _fileancestors() also uses ctx.walk() instead of ctx.manifest().walk() to show a better warning on bad match, which will be tested later.

log: extract function that processes log file patterns We'll need a matcher to compute revs followed from the given patterns.

log: resolve --follow with -rREV in cmdutil.getlogrevs() This also fixes alias expansion. Before, reverse() could be overridden by user alias. This isn't processed at _logrevs() as we'll need starting revisions to parse file patterns. See the subsequent patches for details.

log: remove dead code to follow descendants if ascending revisions specified It's been disabled since 8b4b9ee6001a "log: make -fr show complete history from the given revs" 2015-02-06, and we've got no bug report regarding this exact behavior. For details what the heck "followdescendants" is, please see the issue comment: https://bz.mercurial-scm.org/show_bug.cgi?id=4959#c72 "'rev(%d)' % startrev" can be replaced with '.' since revs are 'reversed(:.)'.

log: duplicate _logrevs() dedicated for walkchangerevs() Prepares for refactoring getlogrevs() to fix the "log -frREV PATH" issue. I initially thought I could get rid of walkchangerevs(), but it turned out requiring non-trivial work because of a "prepare" callback and a scanning window. This patch makes sure that walkchangerevs() will be unaffected by subsequent changes.

update: fix crash on bare update when directaccess is enabled 'rev' may be None. An empty 'rev' string shouldn't also be passed to unhidehashlikerevs().

templater: make sure expression is terminated by '}' This can't be ensured by the tokenize() generator since the parser stop consuming tokens once it reached an end of an operation. Spotted by Matt Harbison.

bookmark: deprecate direct update of a bookmark value This changeset was part of an older series preventing direct update of the bookmarks store without the change being tracked by a transaction. For some unclear reason, this was not sent to the list. So we are sending it now. Initial series: 3325c7dcabaa+08bf0ebc6c8e+712a85b3677f. We want to channel all bookmarks update through 'applychanges' so let's remove more way to work around this function.