make --style=compact look for map-cmdline.compact. change name of key in map file from changelog to changeset. rename command map files to start with map-cmdline. rename ui.logmap to ui.style in hgrc. now --style=foo does this: tries to open foo as file. tries as map-cmdline.foo in template path. tries as foo in template path.

default = 'changelog'
header = header-rss.tmpl
changelog = changelog-rss.tmpl
changelogentry = changelogentry-rss.tmpl
filelog = filelog-rss.tmpl
filelogentry = filelogentry-rss.tmpl
tags = tags-rss.tmpl
tagentry = tagentry-rss.tmpl