when the host doesn't have installed a library needed by a go snap, the build fails

[Leo Arias]

Some go packages will need libraries. If those libraries are not installed in the system, snapcraft allows you to pull them as stage-packages. But in the case of go, when building the source code it is not looking for those libraries on the snap path, so the build fails.

To reproduce:

- make sure that libgudev-1.0-dev is not installed on your system and try to build the following snap:

name: godd
version: 1.0
vendor: Michael Vogt <email address hidden>
binaries:
  godd:
    exec: ./bin/godd
summary: Simple dd like tool
description: Written in go with support for device auto-detection via libgudev, you would need to use hw-assign to access devices.
icon: icon.png

parts:
  godd:
    plugin: go
    source: git://github.com/mvo5/godd
    stage-packages: [libgudev-1.0-dev]
    snap:
     - usr/lib/x86_64-linux-gnu/libgudev-1.0.so*
     - usr/lib/x86_64-linux-gnu/libobject-2.0.so*
     - usr/lib/x86_64-linux-gnu/libglib-2.0.so*
     - bin/godd*

[Leo Arias (elopio)]

Fixed in https://github.com/ubuntu-core/snapcraft/pull/92 with a unit test and bringing back the godd example test.