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tests: failover to copying when symlinking fails #8992

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merged 1 commit into from
Sep 30, 2020

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notnoop
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@notnoop notnoop commented Sep 30, 2020

Symlinking busybox may fail when the test code and the test temporary
directory live on different volumes/partitions; so we should copy
instead. This situation arises in the Vagrant setup, where the code
repository live on special file sharing volume.

Somewhat unrelated, remove f.Sync() invocation from a test copyFile
helper function. Sync is useful only for crash recovery, and isn't
necessary in our test setup. The sync invocation is a significant
overhead as it requires the OS to flush any cached writes to disk.

Related to #8970

Symlinking busybox may fail when the test code and the test temporary
directory live on different volumes/partitions; so we should copy
instead.  This situation arises in the Vagrant setup, where the code
repository live on special file sharing volume.

Somewhat unrelated, remove `f.Sync()` invocation from a test copyFile
helper function.  Sync is useful only for crash recovery, and isn't
necessary in our test setup.  The sync invocation is a significant
overhead as it requires the OS to flush any cached writes to disk.
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LGTM 👍

@notnoop notnoop merged commit 235f938 into master Sep 30, 2020
@notnoop notnoop deleted the b-tests-failover-copy branch September 30, 2020 14:22
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