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Re: [tycho-user] Reproducible Version Qualifiers with only using the git info
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- From: "Keppler Michael (ETAS/ESW-CI)" <Michael.Keppler@xxxxxxxx>
- Date: Wed, 21 Apr 2021 16:02:55 +0000
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- Thread-topic: [tycho-user] Reproducible Version Qualifiers with only using the git info
To me that bug is indeed wrong: The git timestamp is perfectly fine under the condition that you version control _everything needed_ for the build. In the projects I maintain every target platform is fully version controlled (that is, each used artifact and version is listed). There can't be such a thing as an xtext update without my .target file changing and therefore the git timestamp updating (unless Xtext would re-publish changed artifacts with the same qualifier, which is another no-go). I can only imagine your problem to come from a target definition that simply relies on p2 repo URLs without containing specific IUs and versions.
On 21/04/2021 14:14, Christoph Läubrich wrote:
> Hi Ed,
>
> even though I don't understand the whole story/problem in deep I'm in
> the comfortable situation that I control the whole build/deploy cycle
> and so some things are might be more relaxed for my case.
>
> Anyways if you feel something is missing for jgit-timestamp or not
> working as exspected, it would be good to open an issue here
> https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgith
> ub.com%2Feclipse%2Ftycho%2Fissues&data=04%7C01%7Cmichael.keppler%40etas.com%7C31758b29ff974260bb2008d904ccd3f9%7C0ae51e1907c84e4bbb6d648ee58410f4%7C0%7C0%7C637546100038595106%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=57D9T5033QNPko9RBj2pmLW1Qoobuh6eUXbXOx3neFo%3D&reserved=0 so people can get aware of it an maybe enhance.
>
> As I'll give git-timestmaps a try I even will improve things here
> myself if I get aware of them.
>
> Am 21.04.21 um 14:52 schrieb Ed Willink:
>> Hi
>>
>> The jgit timestamp provider is an attractive replacement for the
>> Buckminster reference repo and I adopted it for the OCL builds and
>> encouraged UML2 to adopt it too.
>>
>> However if you read through
>> https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbug
>> s.eclipse.org%2Fbugs%2Fshow_bug.cgi%3Fid%3D529933&data=04%7C01%7C
>> michael.keppler%40etas.com%7C31758b29ff974260bb2008d904ccd3f9%7C0ae51
>> e1907c84e4bbb6d648ee58410f4%7C0%7C0%7C637546100038595106%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=bUGK%2FhlW1Hxt9gvbmQFjHJF3clHRr4ovrqg5yL9CJ9k%3D&reserved=0 you will see my initial enthusiasm for the jgit timestamp provider turn into a realisation that it is unsound in general. But if you have special constraints it may nonetheless be ok for you.
>>
>> My builds now always churn qualifiers.
>>
>> Regards
>>
>> Ed Willink
>>
>> On 21/04/2021 08:53, Mickael Istria wrote:
>>>
>>>
>>> On Wed, Apr 21, 2021 at 9:29 AM Christoph Läubrich
>>> <laeubi@xxxxxxxxxxxxxx <mailto:laeubi@xxxxxxxxxxxxxx>> wrote:
>>>
>>> "Version qualifier is calculated based on timestamp of the most
>>> recent
>>> commit that touches any file under project base directory"
>>>
>>> so project basedir = "bundle" and not "git-tree"?
>>>
>>>
>>> > But it would still be possible to build such a strategy
>>>
>>> would I need a new one or could the jgit be configured to behave
>>> that
>>> way?
>>>
>>>
>>> You should already be able to use the jgit timastamp provider
>>> without using baseline.
>>>
>>> So do I can assume that this might be uncommon but working
>>> use-case or
>>> will it break something?
>>>
>>>
>>> Yes, it's a working use-case.
>>>
>>> ... I think that would be a really cool feature to have such
>>> "incremental-build" support in tycho :-)
>>>
>>>
>>> I don't think it fits the Maven/Tycho layer and their related build
>>> model, it's more operating a build strategy, a bit higher-level than
>>> just a build tool.
>>>
>>> one problem I have stumpled in the past was that the features
>>> don't get
>>> rebuild (as there is no change from maven POV). I don't know if
>>> this is
>>> just unsupprted or I just configured something wrong.
>>>
>>>
>>> It's a bit tricky: feature qualifier do depend on the change in the
>>> feature folder and on content of the feature. Features sometimes
>>> require to be "touched" manually for version changes to cascade into
>>> them.
>>> For your case, since building features is usually very cheap, you
>>> may want to try first filtering out only untouched bundles but keep
>>> building all features anyway.
>>>
>>> _______________________________________________
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