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env GO111MODULE=off
# As of Go 1.12, the module cache is required.
# If none of the variables we use to locate GOCACHE are set, the cache is off
# and we cannot build.
env GOCACHE=
env XDG_CACHE_HOME=
env HOME=
[GOOS:plan9] env home=
[GOOS:windows] env LocalAppData=
! go build -o triv triv.go
stderr 'build cache is required, but could not be located: GOCACHE is not defined and .*'
# If GOCACHE is set but is not an absolute path, and we cannot build.
env GOCACHE=test
! go build -o triv triv.go
stderr 'build cache is required, but could not be located: GOCACHE is not an absolute path'
# An explicit GOCACHE=off also disables builds.
env GOCACHE=off
! go build -o triv triv.go
stderr 'build cache is disabled by GOCACHE=off'
# If GOCACHE is set to an unwritable directory, we should diagnose it as such.
[GOOS:windows] stop # Does not support unwritable directories.
[root] skip # Can write to unwritable directories.
mkdir $WORK/unwritable/home
chmod 0555 $WORK/unwritable/home
[!GOOS:plan9] env HOME=$WORK/unwritable/home
[GOOS:plan9] env home=$WORK/unwritable/home
env GOCACHE=$WORK/unwritable/home
! go build -o triv triv.go
stderr 'failed to initialize build cache.* permission denied'
-- triv.go --
package main
func main() {}
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