cmd/go: GOPROXY using file:// protocol not working on Windows #27698
Description
Please answer these questions before submitting your issue. Thanks!
What version of Go are you using (go version)?
go version go1.11 windows/386
Does this issue reproduce with the latest release?
Yes.
What operating system and processor architecture are you using (go env)?
GOARCH=386
GOOS=windows
What did you do?
git clone https://github.com/pkg/errors c:/repos/github.com/pkg/errors
set GOPROXY=file:///c:/repos
echo package main;import _ "github.com/pkg/errors";func main(){}> main.go
go mod init test
go run .
What did you expect to see?
Successfully imported the package and ran the program. This is documented in cmd/go, where it says:
A Go module proxy is any web server that can respond to GET requests for URLs of a specified form. The requests have no query parameters, so even a site serving from a fixed file system (including a file:/// URL) can be a module proxy.
Also from the module wiki:
Run
go help goproxyfor more about the module proxy, including a pure file-based option via afile:///URL.
What did you see instead?
build test: cannot find module for path github.com/pkg/errors
I may be doing something wrong, but the documentation seems to indicate file:/// is supported.