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.
#!/bin/sh
mkdir a
cd a
hg init
echo foo > b
hg add b
hg ci -m "b" -d "0 0"
chmod -w .hg
cd ..
hg clone a b
chmod +w a/.hg # let test clean up
cd b
hg verify