ci: Add sccache compiler cache#567
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Summary
Adds the
sccachecompiler cache to CI builds. Local cache only -- no cross-run backend yet -- so the benefit comes entirely from within-job hits. Notably,build-dynamodb-windowscompiles the AWS SDK 5 times in one job (build.shonce +build-release-windows.shfour times for static/shared x release/debug); sccache should catch the redundant compilation across those sub-builds.Changes:
.github/actions/ci/action.yml(mozilla-actions/sccache-action@v0.0.10).-D CMAKE_C_COMPILER_LAUNCHER=sccache -D CMAKE_CXX_COMPILER_LAUNCHER=sccachewhensccacheis on PATH; no-op locally.sccache --show-statsprinted after the unit-test build and at the end of the job.Adds a dependency on the
sccachebinary (Mozilla, MIT/Apache-2.0). No new runtime deps in the published SDKs.