On Sat, Oct 20, 2018, 9:42 AM Mark Volkmann <r.mark.volkm...@gmail.com>
wrote:
> I have a simple demo application that wants to use a package that is on my
> local file system.
> The code for the package is in /Users/Mark/foo/bar.
> This directory contains the file bar.go which contains:
>
> package bar
> import "fmt"
> func Hello() {
> fmt.Println("Hello from bar!")
> }
>
> It also contains the file go.mod which just contains:
>
> module bar
>
> The demo application in another directory imports this as "foo/bar" in
> the file main.go.
> It has a go.mod file that contains the following:
>
> module demo
> replace foo/bar => /Users/Mark/foo/bar
>
> When I enter "go run main.go" in the directory of the demo code I get
> build demo: cannot find module for path foo/bar
>
> Is there something wrong with my use of the "replace" directive?
>
Base in this:
https://github.com/golang/go/wiki/Modules#when-should-i-use-the-replace-directive
my understanding is that the path you are replacing has to first be
identified as a locatable import path, as opposed to being able to define
the location of a previously invalid path.
If your top level module is called "demo" and it contains a nested packed
"bar", then in the go.mod I would assume it to be called "demo/bar". If you
forget about it actually currently existing under the "demo" location on
disk, with the absence of GOPATH or a fully qualified vcs import path, how
else would the module system find "bar" if not relative to "demo"?
I'm still learning about Go modules so I could be totally wrong.
> None of this code is under the directory pointed to by GOPATH because I'm
> trying to use Go modules for everything in this demo.
>
> --
> R. Mark Volkmann
> Object Computing, Inc.
>
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