build

cli: git sync - Proof of concept #15885

Job	Run time
Build jj-lib without Git support	45s
Check protos	35s
build (ubuntu-latest)	4m 51s
cargo-deny (advisories)	23s
Check that MkDocs can build the docs	21s
build (macos-13)	11m 0s
cargo-deny (bans licenses sources)	25s
Clippy check	2m 28s
build (macos-14)	4m 46s
Check that MkDocs can build the docs with Poetry 1.8	27s
build (windows-latest)	10m 25s
Check formatting	19s
build (ubuntu-latest, --all-features)	5m 59s
	42m 44s

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