/etc/mercurial/hgrc, $HOME/.hgrc, .hg/hgrc
This file contains defaults and configuration. Values in
.hg/hgrc override those in $HOME/.hgrc, and these override
settings made in the global /etc/mercurial/hgrc
configuration. See hgrc(5) for details of the contents
and format of these files.
.hgignore
This file contains regular expressions (one per line) that
describe file names that should be ignored by hg. For
details, see hgignore(5).
.hgsub
This file defines the locations of all subrepositories,
and tells where the subrepository checkouts came from. For
details, see hg help subrepos.
.hgsubstate
This file is where Mercurial stores all nested repository
states. NB: This file should not be edited manually.
.hgtags
This file contains changeset hash values and text tag
names (one of each separated by spaces) that correspond to
tagged versions of the repository contents. The file
content is encoded using UTF-8.
.hg/last-message.txt
This file is used by hg commit to store a backup of the
commit message in case the commit fails.
.hg/localtags
This file can be used to define local tags which are not
shared among repositories. The file format is the same as
for .hgtags, but it is encoded using the local system
encoding.
Some commands (e.g. revert) produce backup files ending in .orig,
if the .orig file already exists and is not tracked by Mercurial,
it will be overwritten.
