reflect: PkgPath returns un-importable path

[rgarcia]

What version of Go are you using (go version)?

go version go1.5beta3 linux/amd64

What operating system and processor architecture are you using?

Ubuntu Precise 64 bit

What did you do?

I ran PkgPath on a reflect.Type in a vendored package: https://gist.github.com/rgarcia/f0c6507fbd1327d59bcf

(larger context: trying to solve golang/mock#4)

What did you expect to see?

A path string that does not include the "vendor" component.

What did you see instead?

A path string that includes "vendor" (and thus cannot be used as an actual import due to "must be imported as..." compiler error).

[ianlancetaylor]

I think that the current behaviour is probably correct, but leaving open because I'm not entirely certain.

[rsc]

The current behavior is correct. reflect must return a globally unique identifier. It's not guaranteed that you can write a program using PkgPath directly. For vendoring, you can't. You have to remove the .../vendor/ part and you have to make sure the source you put the import in is in the right subtree.