Before this change, a test would fail:
$ GOCACHE=$HOME/go/cache go test
--- FAIL: TestLoadImportsGraph (0.36s)
--- FAIL: TestLoadImportsGraph/GOPATH (0.19s)
packages_test.go:191: golang.org/fake/subdir/d.test.Srcs = [4302876da86a8aae0c1669924daa223cafca60ef49ccaa060ae37e778d18f218-d], want [0.go]
--- FAIL: TestLoadImportsGraph/Modules (0.17s)
packages_test.go:191: golang.org/fake/subdir/d.test.Srcs = [4302876da86a8aae0c1669924daa223cafca60ef49ccaa060ae37e778d18f218-d], want [0.go]
FAIL
This is because it assumed that the user hadn't set their own GOCACHE,
and thus that all source files in the cache would be under the default
"go-build" cache directory.
We could fix this via os.Getenv("GOCACHE"), but a simpler mechanism is
to see if the source file has an extension. Source files don't have an
extension in GOCACHE, so that's much simpler to detect.
After this change:
$ GOCACHE=$HOME/go/cache go test
PASS
While at it, gofmt.
Fixes#29445.
Change-Id: I83c0afc20a527bb50a03f9946e555db36cc85efd
Reviewed-on: https://go-review.googlesource.com/c/155897
Reviewed-by: Michael Matloob <matloob@golang.org>
e7b5a6dfd8