Vala and Snapcraft. Issues with a library part in Vala.

[Luca Dionisi]

I am already doing "after: [mylib-x]".
Snapcraft builds correctly mylib-x and stages it.
Then snacraft tries to build mylib-y with the valac compiler.
The compiler valac looks by default in /usr/share/vala/vapi for a vapi
file that is produced by mylib-x.
The problem is that that file now is in .../stage/usr/share/vala/vapi.
The makefile should add a "--vapidir" flag to the compiler. This was
not needed before because I was always installing mylib-x in the host.
Now I want to create a snap and I am struggling with this issue.
I realize that I don't know how to tell to autotools (in Makefile.am)
that it has to add this flag when the package is being built with
snapcraft.
Maybe I should check DESTDIR, because I see [here
https://snapcraft.io/docs/reference/plugins/autotools] that the
autotools plugin of snapcraft uses DESTDIR by default as a mean to
redirect installation.

But I am afraid that this thing could be a ugly workaround, not very
manageable. What do you think?

On Wed, Feb 1, 2017 at 10:19 PM, Joe Talbott <joe.talbott at canonical.com> wrote:
> I think you'll want something along the lines of:
>
> parts:
>     mylib-x:
>         ...
>     mylib-y:
>         ...
>         after: [mylib-x]
>
> This will include both mylib-x and mylib-y in your snap and ensure
> that mylib-x is built before mylib-y is.
>
> Joe
>
> On Wed, Feb 1, 2017 at 10:01 AM, Luca Dionisi <luca.dionisi at gmail.com> wrote:
>> On Wed, Feb 1, 2017 at 1:29 PM, Gustavo Niemeyer <gustavo at niemeyer.net> wrote:
>>> Yeah, besides "build-packages" there's also "stage-packages" which does
>>> exactly that.
>>
>> I think you misunderstood. "build-packages" puts a deb package in the
>> build host, "stage-packages" puts a deb package in stage.
>> But I don't have a deb package of mylib-y.
>> I want snapcraft to build both mylib-y and mylib-x, where mylib-x
>> depends on mylib-y being installed.
>> What I want is snapcraft to put the "install" pieces of the part
>> "mylib-y" in the build host too (other than in stage).
>> Is that doable?
>> Or... wait, are you telling me that I can put the name of another
>> "part" in "build-packages" instead of the name of a deb?
>>
>>
>>> On Wed, Feb 1, 2017 at 8:34 AM, Luca Dionisi <luca.dionisi at gmail.com> wrote:
>>>>
>>>> This is another solution that I thought of.
>>>> I want to put the library mylib-y (the one that is needed by mylib-x)
>>>> both in the ./stage tree and in the /usr/ prefix of the host system
>>>> where I prepare the snap.
>>>> Is there a way to tell snapcraft to do so?
>>>> It should be similar to the way one can use 'build-packages' to
>>>> install deb packages on the build host.
>>>>
>>>> --Luca
>>
>> --
>> Snapcraft mailing list
>> Snapcraft at lists.snapcraft.io
>> Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/snapcraft
>
> --
> Snapcraft mailing list
> Snapcraft at lists.snapcraft.io
> Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/snapcraft