Cheviiot b366dfa9ac Add a concurrency lock for download/install against the same destination ...

combineDirTrees' merge logic assumes it's the only thing moving files
into a given target at a time; two `vintner download`/`install` runs
racing against the same --dest could otherwise interleave os.Rename
calls and corrupt the tree instead of erroring cleanly. Take an
exclusive, non-blocking flock(2) on the destination for the duration
of each run, so a second invocation fails immediately with a clear
message instead of silently colliding with the first.

2026-07-25 18:10:56 +10:00

..

vintner

Add a concurrency lock for download/install against the same destination

2026-07-25 18:10:56 +10:00