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Where are my build files when I use `go run`
9 June 2020_
By default, 'go run' runs the compiled binary directly. The binaries are stored in a temp work folder, to see where they are stored use the -work flag. This directory path is stored in the GOCACHE env variable. Use go env to check its value
$ go env GOCACHE
/Users/username/Library/Caches/go-build

Demo

go run --work fizzbuzz.go
Sample Output
WORK=/tmp/go-build645222420
[1 2 Fizz]
When you run this go will not delete the temporary build when exiting. The default directory may vary with your system & GOPATH.
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