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11:28:04 Guus
What is the purpose of `TRAVIS_TAG:-` on the first line below (characters 23 trough 34)?
```
$ export TRAVIS_TAG=${TRAVIS_TAG:-$(date +'%Y%m%d')-TRAVIS_BUILD_NUMBER_$TRAVIS_BUILD_NUMBER-$(git log --format=%h -1)}
$ echo $TRAVIS_TAG
20200402-TRAVIS_BUILD_NUMBER_-c74cade
```
11:28:20 Guus
It doesn't seem to be included in the exported value?
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11:31:31 jonas’
Guus, ${foo:-bar} defaults the expression to `bar` if `foo` is not defined
11:31:48 jonas’
the `-` is part of the syntax
11:31:54 Guus
ah!
11:32:41 Guus
then it seems this construct is a mismatched combination of copy/paste
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why?
11:34:19 Guus
TRAVIS_TAG is never defined.
11:34:30 jonas’
you sure?
11:34:38 Guus
well, it shouldn't.
11:35:49 jonas’
then I suggest not exporting a variable named like something the CI server could set ;)
11:35:54 Guus
or should it... hmm.. wI didn't _expect_ it 🙂
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18:11:04 lovetox
if i get a disco info request to my full jid
18:11:17 lovetox
with a node that resembles entity caps
18:11:33 lovetox
should i check if the hash is my current hash
18:11:44 lovetox
and if not probably answer with an error or not?
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18:13:54 lovetox
because 0115 does not mention anything about in what cases one should return an error
18:13:58 lovetox
and what error that would be
18:16:16 flow
lovetox, smack caches the last N caps and will return the information
18:17:09 lovetox
sound wrong to me
18:17:28 flow
but maybe I don't get the question. the answer seems trivial to me: if you can answer the query, the answer it, otherwise response with an error
18:17:37 flow
lovetox, how come?
18:17:39 lovetox
but doesnt answer my question, you assume someone sends a hash that existed in the past
18:18:51 flow
ok, then I probably don't understand the question
18:19:39 lovetox
i send a disco info request with node="lovetoxlovesdisco"
18:19:42 lovetox
what does smacks answer?
18:20:02 flow
assuming the node does not exists, hopefully whatever xep30 specifies to return in that case
18:20:13 flow
looks at xep30 (and later at smack's code)
18:20:33 flow
https://xmpp.org/extensions/xep-0030.html#errors
18:20:50 flow
item-not-found
18:24:04 flow
lovetox, does that help?
18:24:21 flow
(or, does it sound right?)
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18:34:13 lovetox
yeah thats what i thought, item-not-found seems to fit
18:34:38 lovetox
just find it weird that 115 neither say anything about checking the node hash, nor notes any error cases
18:35:39 lovetox
for example Gajim does not check the node hash, and just returns its disco info
18:35:45 lovetox
which seems pretty bad
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18:38:04 flow
indeed
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18:38:32 flow
tbh, I wouldn't expect that xep115 has to say anthing about this, as its all within the realm of xep30
18:39:41 flow
tbh, I wouldn't expect that xep115 has to say anything about this, as its all within the realm of xep30
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18:49:36 lovetox
do have some kind of node register functionality
18:49:46 lovetox
it seems more than one xep uses disco
18:49:53 lovetox
like adhoc which can have various nodes
18:50:05 lovetox
but its not clear if we receive a disco for what module it is
18:50:24 lovetox
entity caps, ad hoc, or something else
18:50:32 lovetox
there is no xep namespaces here
18:50:40 flow
well it should be clear to the receiving entity if there is something behind that node or not
18:51:01 lovetox
yeah but how do you implement that in a library
18:51:12 lovetox
you have multiple modules, and they register their nodes in some kind of service
18:51:16 flow
hmm? I don't see a problem, smack obviously did
18:51:18 lovetox
which routes the iq then to correct module
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18:51:25 lovetox
im asking you flow
18:51:27 lovetox
how you did it
18:51:34 flow
you only have an issue if there is a clash in the node name
18:52:33 flow
and to prevent those we have https://github.com/xsf/registrar/blob/master/nodes.xml
18:53:55 flow
lovetox, smack's entity caps manager tells the service discovery manager to return X on a disco info request to node Y
18:54:26 lovetox
ok so modules register their nodes in some kind of service
18:54:39 flow
yap
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18:55:05 lovetox
yeah seems good, sigh, more work, it never ends
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18:55:42 flow
its similar to how modules can register for IQ requests
18:56:14 flow
just in this case, it's limited to a particular IQ and involves nodes (the often unknown and misunderstood concept of XMPP)
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18:58:04 lovetox
ok thanks :)
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19:05:24 flow
always happy to help :)
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