At run time the warm steps rebuilt the crates with build scripts on
every start, which took about two minutes. Cargo now builds only what a
command needs, when it runs.
On an incremental image build, setting a changed file to the commit
time can make it older than its stale build output, so cargo would skip
the rebuild. Rounding down to the whole second still survives the image
layer and never moves a file back past its outputs.
On an incremental image build, setting a changed file to the commit
time can make it older than its stale build output, so cargo would skip
the rebuild. Rounding down to the whole second still survives the image
layer and never moves a file back past its outputs.
Pin source mtimes to the commit time at image build, so cargo's
fingerprints survive the image layer and the warm build stays fresh.
Drop the incremental cache to shrink the baked target/.
Pin source mtimes to the commit time at image build, so cargo's
fingerprints survive the image layer and the warm build stays fresh.
Build with line-tables-only debug info and drop the incremental cache
to shrink the baked target/.
The non-local path leaves EXTRA_ENV as an empty array, and expanding
"${EXTRA_ENV[@]}" under `set -u` errors with "unbound variable" on
bash 3.2 (the version shipped on macOS), aborting before the suite
runs. Guard the expansion with ${EXTRA_ENV[@]+...} so an empty array
expands to nothing instead.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Georgios Jason Efstathiou