convert: add tagmap logic
Previously, there was no way to rewrite tags on the fly while converting. Now,
we add similar logic to branchmap to provide a way to map old tags to new tags.
Currently, this is not enabled since there is not yet a command-line option.
convert: avoid updating tags when there is nothing new
Previously, when converting from a mercurial repo there would be an extraneous
commit at the end of the convert process that would rewrite tags. Now, we check
if there are any new tags before doing this rewriting.
convert: compare tags from all heads instead of just one
Previously, the hg sink for puttags would just use one head for getting the old
tags which would sometimes lead to tags disappearing. Now, we iterate over all
heads and merge the results.
convert: add parseclosemap method
This is a copy of the parsesplicemap method and will serve as a way to specify
which changesets to close while converting.
convert: add mapname parameter to checkrevformat
Upcoming patches will add new map files so we change the calling sequence of
checkrevformat so that error messages will let the user know which file has the
wrong rev format.
convert: replace old sha1s in the description
This is a simple find-and-replace strategy for matching anything in the
old description of a converted commit and, if that matched sha1 exists
in the mapping, replacing it with the new sha1.
In particular, this is helpful for descriptions that contain tags with
messages such as, "Added tag 1.0 for commit
abcde1234567" which will now
be automatically converted.
Tests have been updated accordingly.