sccache 0.17.0
Summary
sccache 0.17.0 is a significant release: it introduces a new client-side architecture.
Until now, every compilation was handed off to the long-lived sccache server, which did the cache
lookup and ran the compiler. In client-side mode, the client process does that work itself - the
server is only consulted for the shared state it owns (compiler info, dist client, stats). This
removes a round-trip and the server-side bottleneck, and gives noticeably better results on
developer workstations.
Client-side mode is opt-in for now: enable it with the SCCACHE_CLIENT_SIDE environment variable
(or the client_side_mode config key). See docs/Architecture.md
for the details.
Other highlights:
- Response files: gcc/clang builds using quoted @response files are now cached and
distributed correctly (#2755, #2772), and Rust @argfile arguments are supported (#2782).
- Distributed compilation: compile tasks and their subprocesses are now aborted when a client
disconnects, instead of running to completion on the build server (#2761, #2774). The
ToolchainPackager cfg gate was fixed so the dist code builds on ppc64le and s390x (#2749).
- S3 SSE-KMS: server-side encryption with KMS keys is now supported (#2770).
- Diagnostics: gcc color diagnostics now behave the same way as rustc's (#2758).
- Preprocessor correctness: -ivfsoverlay is treated as a preprocessor-only argument (#2767).
Welcome to 4 new contributors!
Client-side mode
- Initial client-side implementation by @glandium in #2735
- doc: document client-side and direct modes in Architecture.md by @sylvestre in #2752
Features
- gcc/clang: cache and distribute builds using quoted @response files by @avikivity in #2755
- Add support for arg files in Rust by @ranger-ross in #2782
- feat: support S3 SSE-KMS by @jpadilla in #2770
- Make gcc diagnostics color output work the same as for rustc by @jwidauer in #2758
- Abort compile tasks and associated subprocesses when a client disconnects by @trxcllnt in #2761
Fixes
- Fix ToolchainPackager cfg gate to build on ppc64le/s390x by @cryptomilk in #2749
- treat -ivfsoverlay as a preprocessor-only argument by @glandium in #2767
- gcc: refine response-file tokenizer visibility and whitespace handling by @sylvestre in #2772
- Fix description of Unix socket-based Redis connection by @Toorero in #2769
Cleanup
- Simplify the code from pr #2761 by @sylvestre in #2774
- tests: pin libc in the dist test crate by @sylvestre in #2784
- Release 0.17.0 by @sylvestre in #2783
New Contributors
- @jwidauer made their first contribution in #2758
- @jpadilla made their first contribution in #2770
- @ranger-ross made their first contribution in #2782
- @Toorero made their first contribution in #2769
