Servo downloads appropriate versions of Rust and Cargo using Python’s
urllib2. At some point, https://static.rust-lang.org started requiring
TLS SNI (I think when it moved to a CDN?) and we had issues with
downloads failing on CI or on contributor’s machines because of old
Python versions.
So we moved to using https://static-rust-lang-org.s3.amazonaws.com
instead, which does not require SNI. However, that URL is not considered
stable:
https://internals.rust-lang.org/t/public-stable-rust-services/6072
I don’t expect it’ll go away any time soon, but we should still consider
not relying on it.
I propose that we move back to using https://static.rust-lang.org, and
document that Python 2.7.9 or more recent is required, and print a
warning when and older version is used.
Support for SNI was added in 2.7.9, which was released in December 2014.
Debian has had a recent enough default version since Debian 8.0 Jessie
released in April 2015, and Ubuntu since Vivid Vervet 15.04 released in
April 2015.
Travis-CI still uses Ubuntu 14.04 LTS, but using 'language: python' in
.travis.yml gives an environment with a recent enough Python version.
Thoughts ?
--
Simon Sapin
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