How can I combine the Mercurial commands hg pull and hg update into one?
Obviously, hg pull -u is the answer here.
However, there's a caveat that deserves mentioning: hg pull -u is not exactly equivalent to hg pull && hg update. This is briefly mentioned in the documentation, but it can be surprising if you first run into it; if there's nothing to pull (e.g. no new changesets came in), then hg pull -u doesn't update. This can be slightly confusing if you weren't on a head before issuing the command.
type hg help pull and you will see the -u switch
You can use:
hg pull -u
Read the documentation for more options.
The hg fetch extension will do the same once enabled. However, it has fallen out of favor and is noted as an "unloved feature" by the Mercurial team.
来源：https://stackoverflow.com/questions/15241394/mercurial-command-to-combine-hg-pull-hg-up