hg way to get just a bundle of a remote repository without applying it

[Avi Kelman]

On Tue, 2018-01-30 at 11:54 -0600, Kevin Bullock wrote:
> > On Jan 25, 2018, at 18:35, Avi Kelman <patcherton.fixesthings at gmail.com>
> > wrote:
> > 
> > Hi all. I'm looking for how to do basically the first part of hg clone,
> > where a
> > bundle file is retrieved over the wire from a remote server, but then just
> > saving that bundle file
> 
> You can use 'hg incoming --bundle FILE' for this. You'll need to run it
> inside of an empty local hg repo though.


Ok, this sort of works, but...

After downloading, the process for `hg incoming --bundle bundlefile --quiet htt
ps://hg.mozilla.org/mozilla-unified/` fills up a whopping 12GB of RAM which is
catastrophic to the system.

The whole bundle is only ~5GB uncompressed, and mozilla specifically premakes
compressed bundles for clone to fetch quickly.

I'm really looking to just save what clone is downloading and then stop there,
even if it means a python script. :\