[bug#30214] [PATCH 02/10] gnu: Add go-github.com-howeyc-gopass.

[Leo Famulari <leo@famulari.name>]

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On Tue, Jan 23, 2018 at 07:45:12PM +0000, Christopher Baines wrote:
> 
> Leo Famulari <leo@famulari.name> writes:
> 
> > On Mon, Jan 22, 2018 at 09:08:22PM +0000, Christopher Baines wrote:
> >> * gnu/packages/terminals.scm (go-github.com-howeyc-gopass): New variable.
> >
> >> +      (native-inputs
> >> +       `(("go-golang.org-x-crypto-ssh-terminal"
> >> +          ,go-golang.org-x-crypto-ssh-terminal)))
> >
> > Is it really just a native-input? Or could it need this library later,
> > at run-time?
> 
> Well, the package doesn't build without it, and as far as I can tell the
> store output doesn't reference it. I believe that
> go-golang.org-x-crypto-ssh-terminal is a dependency of
> go-github.com-howeyc-gopass, so if you're using
> go-github.com-howeyc-gopass, then you'll need
> go-golang.org-x-crypto-ssh-terminal. Maybe it should be a propagated
> input instead?

Go looks for dependencies by first looking for their source code (this
is why the go-build-system installs the source code by default). Once it
finds the source code, then it looks up the compiled objects.

Finally, when building the end-user application (not just some library)
it links everything together in what's basically a static archive.

If everything seems to work even though x-crypto-ssh-terminal is a
native-input, then I bet that whatever is using howeyc-gopass does not
exercise the part of howeyc-gopass's code using x-crypto-ssh-terminal.

I think it's more correct here to propagate, unless
x-crypto-ssh-terminal is only used for howeyc-gopass's test suite or
something like that.

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