Problems with PREFIX when building a snap

[Dietmar Winkler]

Hi James,

OK now I understand. Still not all resolved but that can be handled in
the other thread.
https://lists.ubuntu.com/archives/snapcraft/2016-July/000561.html

Thanks again,

On 29 July 2016 at 10:26, James Jesudason <james.jesudason at canonical.com> wrote:
>
>
> On 28 July 2016 at 18:36, Dietmar Winkler <dietmar.winkler at dwe.no> wrote:
>>
>> Thanks James,
>>
>> you are right the build works now. But I hope you don't mind me asking
>> (since I really want to understand it) how you ended up at that
>> IPEPREFIX path.
>>
>> The source is in:
>>
>> ~/tmp/snap/ipe/parts/ipe/src
>>
>> For the build that gets copied over to
>>
>> ~/tmp/snap/ipe/parts/ipe/build
>>
>> make gets executed in the subdir "src", which means now we are in
>>
>> ~/tmp/snap/ipe/parts/ipe/build/src
>>
>> Now I try to travers 3 levels up as defined by
>>
>> - IPEPREFIX=../../../install
>>
>> and I end up in
>>
>> ~/tmp/snap/ipe/parts/
>>
>> but here is only the "ipe" dir the install is one level below:
>>
>> ~/tmp/snap/ipe/parts[master]$ tree -L 2
>> .
>> └── ipe
>>     ├── build
>>     ├── install
>>     ├── src
>>     ├── state
>>     └── ubuntu
>>
>> So how come
>>
>> - IPEPREFIX=../../../install
>>
>> works but
>>
>> - IPEPREFIX=../../install
>>
>> would not (which I would find logical)?
>>
> It's more to do with the build script than with snapcraft. Since there are
> multiple directories called "install" it's hard to see what's happening. If
> you try something like "../xxxx" instead, then it's easier to spot what the
> script is doing.
>
> When the script was running, I spotted that it said:
>
> make[2]: Entering directory '<snip>/parts/ipe/build/src/ipe'
>
> So, that's where the extra level comes from.
>
>
>>
>>
>> One other question, is there somewhere a list of available "plugs". I
>> guessed I would need "x11" but only found this reference in some
>> examples. I did not manage to find any specific documentation on this.
>>
>
> The plugs are documented with snapd rather than snapcraft. There's a list
> here:
> https://developer.ubuntu.com/en/snappy/guides/interfaces/
>
> But the definitive list is the source code (sometimes the tests there can be
> helpful):
> https://github.com/snapcore/snapd/tree/master/interfaces/builtin
>
> The "playpen" examples can be helpful as well:
> https://github.com/ubuntu/snappy-playpen
>



-- 
/Dietmar/

Secure email communication:
https://encrypt.to/dietmar.winkler@dwe.no
Public OpenPGP key: 0x235E6689