update: add --check option

tags: drop nested function

tags: generate contexts directly

tags: reverse and simplify head-walking

tags: simplify rev handling

tags: fold in _hgtagsnodes

compare grep result between target and its parent I found that typical case is that grep target is added at (*) revision in the tree shown below. +--- 1(*) --- 3 0 +--- 2 ------ 4 Now, I expect 'hg grep --all' to show only rev:1 which is first appearance of target line. But 'hg grep --all' will tell: target line dis-appeared at 3 => 4 target line appeared at 2 => 3 target line dis-appeared at 1 => 2 target line appeared at 0 => 1 because current 'hg grep' implementation compares not between target revision and its parent, but between neighbor revisions in walkthrough order. I checked performance of this patch by "hg grep --follow --all walkchangerevs" on whole Mercurial repo, and patched version could complete as fast as un-patched one.

url: let host port take precedence when connecting to HTTPS Fixes use of HTTPS connections on non-standard ports.

url: support client certificate files over HTTPS (issue643) This extends the httpshandler with the means to utilise the auth section to provide it with a PEM encoded certificate key file and certificate chain file. This works also with sites that both require client certificate authentication and basic or digest password authentication, although the latter situation may require the user to enter the PEM password multiple times.

acl: support for getting authenticated user from web server (issue298) Previously, the acl extension just read the current system user, which is fine for direct file system access and SSH, but will not work for HTTP(S) as that would return the web server process user identity rather than the authenticated user. An empty user is returned if the user is not authenticated.