[Lazarus] Multiple versions of the same package and its dependencies?

[Luca Olivetti]

El 4/6/24 a les 15:17, Michael Van Canneyt via lazarus ha escrit:

>> Shouldn't lazarus already know the different versions of all the 
>> packages?
>> This is with lazarus 3.2 btw, I didn't yet try 3.4
> 
> The zeos packages themselves need to indicate the min/max versions of the
> packages they depend on. Then, if lazarus needs to decide the dependencies,
> it will select the correct ones if it knows them.

Yes, they do, they specify a min/max corresponding to the version, i.e.:


zcomponent 7.1.4 requires
    zplain >=7.1 <=7.1
    zparsesql >=7.1 <=7.1
    zdbc >=7.1 <=7.1
    zcore >=7.1 <=7.1

zplain requires
   zcore >=7.1 <=7.1


zparsesql requires
   zcore >=7.1 <=7.1


zdbc requires
   zplain >=7.1 <=7.1
   zparsesql >=7.1 <=7.1
   zcore >=7.1 <=7.1


but I have to open the lpk of all the packages every time I want to 
switch from 7.1.4 to 7.2.12 and viceversa otherwise lazarus complains 
about missing packages.


> I used the versioning extensively, and it works fine, but every package 
> must
> "play nice" before it can work correctly.

Maybe the problem is because the packages only specify major/minor 
instead of major/minor/revision?

Another question is, my projects using zeos automatically acquired the 
version I used when I wrote them (e.g. zcomponent >=6.5), since both 7.1 
and 7.2 (and 8.0) satisfy the requirement, which version will the 
project actually use? The last one I opened the lpk, the one installed 
in the ide or the higher version available?

Bye

-- 
Luca Olivetti
Wetron Automation Technology https://wetron.es/
Tel. +34 93 5883004 (Ext.3010)  Fax +34 93 5883007