Cannot build while offline

[robarnold]

I pulled a few days ago, then tried to build while offline and got the following error:
determined most recent snapshot: rust-stage0-2011-07-11-a84310a-macos-i386-e775077d87e508020d8e0282f944d66c89cae630.tar.bz2

curl: (6) Couldn't resolve host 'dl.rust-lang.org'
Traceback (most recent call last):
File "../src/etc/get-snapshot.py", line 66, in
get_url_to_file(url, dl)
File "/Users/robarnold/mozilla/rust/src/etc/snapshot.py", line 99, in get_url_to_file
subprocess.check_call(["curl", "-o", f, u])
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py", line 488, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['curl', '-o', 'dl/rust-stage0-2011-07-11-a84310a-macos-i386-e775077d87e508020d8e0282f944d66c89cae630.tar.bz2', 'http://dl.rust-lang.org/stage0-snapshots/rust-stage0-2011-07-11-a84310a-macos-i386-e775077d87e508020d8e0282f944d66c89cae630.tar.bz2']' returned non-zero exit status 6

[graydon]

Not sure there's much we can do about that; the snapshots evolve in concert with the code.

There's a script (src/etc/mirror-all-snapshots.py) but it's only going to take snapshots already-registered, not those-to-come in the future. You'll continue to need network access to pick those up as they are registered.

[graydon]

On IRC, followup suggested having the build system note when it's offline and suggest reverting to an earlier rev (based on most-recent snapshot). Entirely plausible.

[lkuper]

+1 for the reverting-to-most-recent-snapshot-while-offline idea. Sooner or later we're all going to want to do builds while on airplanes.

[eholk]

Couldn't the build system recreate the whole snapshot sequence? The latest snapshots.txt has the whole sequence, including what git revision they were build from, so presumably it could say "I have version X, but I need Z. Let's revert to Y, build the snapshot, then update to Z, build the snapshot, and then update to HEAD."

It might be easier just to find an internet connection in most cases though...

[jruderman]

I use a single script to pull and run "make", so I always have the right snapshot when I'm hacking later. Would that strategy work for you?

[brson]

I don't see this being fixed any time soon so I'm going to close it. Feel free to reopen if anybody is passionate about it.