convert: add config to not convert tags In some cases we do not want to convert tags from the source repo to be tags in the target repo (for instance, in a large repository, hgtags cause scaling issues so we want to avoid them). This adds a config option to disable converting tags.

templatekw: make {rev} return wdirrev instead of None wdirrev/wdirnode identifiers are still experimental, but {node} is mapped to wdirnode. So {rev} should do the same for consistency. I'm not sure if templatekw can import scmutil. If not, we should move intrev() to node module.

changeset_printer: use node.wdirrev to calculate meaningful parentrevs Because we defined the working-directory revision is INT_MAX, it makes sense that "hg log -r 'wdir()'" displays the "parent:" field. This is the same for two revisions that are semantically contiguous but the intermediate revisions are hidden.

workingctx: use node.wdirid constant

node: define experimental identifiers for working directory The "ff..." node was introduced at 183965a00c76, and we also need an integer that can be processed in revset. We could use len(repo), but it would be likely to hide possible bugs. Instead, using INT_MAX, we can notice such bugs by IndexError, at the cost of handling non-contiguous revisions.

templatekw: apply manifest template only if ctx.manifestnode() exists This will prevent crash by "hg log -r 'wdir()' -Tdefault". We could use the pseudo ff... hash introduced by 183965a00c76, but it isn't proven idea yet. For now, I want to make "hg log" just works in order to test 'wdir()' revset. Note that unlike its name, "{manifest}" is not a list of files in that revision, but a pair of (manifestrev, manifestnode).