env GOPRIVATE=match-absolutely/nothing
! garble build -o=out ./standalone
stderr '^GOPRIVATE="match-absolutely/nothing" does not match any packages to be built$'

env GOPRIVATE=test/main/imported
! garble build ./importer
stderr '^public package "test/main/importer" can''t depend on obfuscated package "test/main/imported" \(matched via GOPRIVATE="test/main/imported"\)$'

[short] stop

env GOPRIVATE='*'
garble build -o=out ./standalone

-- go.mod --
module test/main

go 1.15
-- standalone/main.go --
package main

func main() {}
-- importer/importer.go --
package importer

import "test/main/imported"

var _ = imported.Name
-- imported/imported.go --
package imported

var Name = "value"