1000713 - Make sccache usable on the desktop

Status: NEW

(Firefox Build System :: General, defect)

Description

[Mike Hommey [:glandium]]

Most notably for Windows.

Comment 1

[(not currently active) Ted Mielczarek]

I'm going to use this to track my Q2 deliverable. The main goals will be:
* Make it easy to enable sccache for developer builds
* Make sccache able to use our CI cache in S3 in read-only mode, with local storage as a fallback
* Fix things to make it so we get cache hits from local builds, most notably using relative paths (ala CCACHE_BASEDIR: https://ccache.samba.org/manual.html#_compiling_in_different_directories )

Comment 2

[(not currently active) Ted Mielczarek]

I neglected to mention, but my work this quarter will focus on Windows, since the variety of supported toolchains is much smaller there (currently only VC2013 + VC2015).

Comment 3

[Armen [:armenzg]]

Do we currently use sscache in automation?

Comment 4

[Gregory Szorc [:gps]]

(In reply to Armen Zambrano [:armenzg] - Engineering productivity from comment #3)
> Do we currently use sscache in automation?

Yes. It isn't deployed everywhere, however.

Comment 5

[(not currently active) Ted Mielczarek]

We're currently using glandium's Python implementation: https://github.com/glandium/sccache

I'm rewriting it in Rust: https://github.com/luser/sccache2 .

Once the Rust version reaches feature-parity with the Python version I'd like to roll it out into production to replace the Python version, then begin making the changes necessary to make it more useful for local development.

Comment 6

[Armen [:armenzg]]

Thanks ted!

(In reply to Gregory Szorc [:gps] from comment #4)
> (In reply to Armen Zambrano [:armenzg] - Engineering productivity from
> comment #3)
> > Do we currently use sscache in automation?
> 
> Yes. It isn't deployed everywhere, however.

How do we currently deploy it? What *enables* it? Can I know from the logs where it is enabled?
Is there a doc somewhere describing this so I won't have to ask too many questions?

Comment 7

[Armen [:armenzg]]

My apologies for the noise. Already being tracked in bug 1280641.