newbie question about the autools configflags

[Nicola Manica]

Thank you very much, now it works!

2016-02-07 17:52 GMT+01:00 Kyle Fazzari <kyle.fazzari at canonical.com>:

> Hey Nicola,
>
> On 02/06/2016 04:11 PM, Nicola Manica wrote:
> > I am newbie about ubuntu snappy. I read the doc, but I was not able to
> > find an answer for my problem.
>
> You're in the right place!
>
> > I am trying to create a snap for nginx.
> > The relevant parts of the snapcraft.yaml is
> >
> > parts:
> >   nginx:
> >     type: autotools-project
> >     plugin: autotools
> >     source: http://nginx.org/download/nginx-1.9.7.tar.gz
> >     source-type: tar
> >     configflags:
> >       - --with-ld-opt="-Wl,-rpath,/usr/local/lib/"
> >       - --add-module=ngx_devel_kit
> >       - --add-module=lua-nginx-module
> >       ...
> >      after:
> >       - lua-nginx-module
> >       - ngx-devel-kit
> >
> > Without the modules it compiles fine.
> > My question is about the add-module configflags. The add-module
> > directive expects the filesystem path of the module, what is the right
> > way to manage it?
>
> Alright, so from the YAML I'm assuming that lua-nginx-module and
> ngx-devel-kit are separate "parts" in the YAML. The problem you're
> having is that there's no way to know ahead of time where they will be,
> so you can't provide paths to --add-module. The solution to this problem
> depends on which version of Snapcraft you're running. If you're running
> Snapcraft 2.1 or later, check this out:
>
>
>
> https://github.com/ubuntu-core/snapcraft/blob/master/docs/snapcraft-advanced-features.md#putting-your-parts-in-order
>
> Specifically, note that you can use the $SNAPCRAFT_STAGE variable which
> will give you a path into the staging directory, where both the
> lua-nginx-module and ngx-devel-kit parts will exist before the nginx
> part is built thanks to your use of the "after" keyword. So your YAML
> will have something like this:
>
>     # ...
>     configflags:
>         - --with-ld-opt="-Wl,-rpath,/usr/local/lib/"
>         - --add-module=$SNAPCRAFT_STAGE/ngx_devel_kit
>         - --add-module=$SNAPCRAFT_STAGE/lua-nginx-module
>     # ...
>
> If, however, you're on Snapcraft 1, the only solution I know of is to
> hard-code a path into the staging directory. It doesn't lead to the most
> portable YAML, but it works:
>
>     # ...
>     configflags:
>         - --with-ld-opt="-Wl,-rpath,/usr/local/lib/"
>         - --add-module=/path/to/snapcraft.yaml/stage/ngx_devel_kit
>         - --add-module=/path/to/snapcraft.yaml/stage/lua-nginx-module
>     # ...
>
> I hope that helps!
>
> --
> Kyle Fazzari (kyrofa)
> Software Engineer
> Canonical Ltd.
> kyle at canonical.com
>
>
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>
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