setup libsolv UI: Silently install dependencies?

Ken Brown
Tue Jan 9 15:40:00 GMT 2018

On 1/9/2018 8:32 AM, Jon Turney wrote:
> On 05/01/2018 16:04, Ken Brown wrote:
>> On 1/5/2018 10:48 AM, Jon Turney wrote:
>>> On 24/12/2017 23:23, Ken Brown wrote:
>>>> Currently the libsolv version of setup silently installs added 
>>>> dependencies.  The user gets a chance to review them first only if 
>>>> libsolv finds problems and has to display the prerequisite page.
>>>> I'm not sure if this was a deliberate design decision, though I 
>>>> personally like it.  On the other hand, I suspect that some users 
>>>> won't like it because they're used to seeing a report about missing 
>>>> dependencies.  So I think we should make this behavior optional.
>>> Yeah.  Ideally we'd show what we're going to do, before we do it.
>>> This is a bit more complex than before, as the solver might decide to 
>>> remove or upgrade packages, rather than just install extra ones.
>>>> The attached patch is a start in that direction.  But it needs a 
>>>> followup patch to implement the mechanism for selecting the option. 
>>>> One possibility is a checkbox on the chooser page, which then gets 
>>>> saved in setup.rc as a user option.  Are there other suggestions?
>>> But, somewhat confused by this.  Isn't this just going to show the 
>>> (empty) problem report?
>> No, it shows a report that says, "Click Back and select the Pending 
>> view to review the default problem solutions, including packages that 
>> were added to resolve dependencies."  This isn't ideal, because it 
>> forces the user to select 'Back', and even then the user can't see 
>> explicitly why packages were added.  It would be better if we could 
>> get libsolv to give 
> Ah, right.
>> us a report about added dependencies.  Do you know if this is possible?
> Hmmm.. there's the SOLVER_USERINSTALLED flag we can apply to a task. 
> Perhaps that is passed through, so we can see what's been installed 
> directly vs. dependencies.
> Otherwise I guess you could to compare input and output task lists to 
> see what has been added by the solver?
> I'm not sure it's ideal to make a text report of this, though. 
> Displaying it in the chooser somehow seems a better fit.
> (i.e. after you've made your selections, you get something like the 
> "pending" view in the chooser again, showing what will be done, which 
> you can either confirm or go back from)

Yes, that does seem better.


More information about the Cygwin-apps mailing list