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Improve build caching on CI #1902

Merged
merged 4 commits into from
Nov 21, 2019
Merged

Improve build caching on CI #1902

merged 4 commits into from
Nov 21, 2019

Commits on Nov 17, 2019

  1. Disable incremental compilation on CI 

    For some reason, incremental files are changing on CI even when no code
changes.  Turning off incremental compilation should help avoid
uploading a new cache with every single build.

This commit also removes `target/.rustc_info.json` from the CI cache
    @jtgeibel
    jtgeibel committed Nov 17, 2019
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  2. Only install diesel on CI if the binary isn't cached 

    The CI build cache is currently updated with every build, even if there
are no changes.  This is because running `cargo install` will update
the index causing some files under `$HOME/.cargo` to be updated,
invalidating the cache.

The drawback is that if we bump the diesel version, then the CLI will
not be automatically updated.  However, even an old version of the CLI
application is expected to be able to run our migrations on CI and the
cache can always be cleared if a new version is needed.
    @jtgeibel
    jtgeibel committed Nov 17, 2019
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  3. Disable debug info on CI 

    This is an attempt to further decrease the cache size on CI.
    @jtgeibel
    jtgeibel committed Nov 17, 2019
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  4. Run cargo clean on CI 

    The change to `RUSTFLAGS` changes build hashes, so wiping the target
directory and doing a full rebuild.
    @jtgeibel
    jtgeibel committed Nov 17, 2019
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