Hash :
8df4f519
Author :
Date :
2020-05-23T15:04:54
clar: copy files internally instead of /bin/cp
clar has historically shelled out to `/bin/cp` to copy test fixtures
into a sandbox. This has two deficiencies:
1. It's slower than simply opening the source and destination and
copying them in a read/write loop. On my Mac, the `/bin/cp` based
approach takes ~2:40 for a full test pass. Using a read/write loop
to copy the files ourselves takes ~1:50.
2. It's noisy. Since the leak detector follows fork/exec, we'll end up
running the leak detector on `/bin/cp`. This would be fine, except
that the leak detector spams the console on startup and shutdown, so
it adds a _lot_ of additional information to the test runs that is
useless. By not forking and using this internal system, we see much
less output.