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Apprentice
Apprentice


Joined: 20 Apr 2002
Posts: 253
Location: Chantilly, VA

PostPosted: Tue Apr 23, 2002 4:17 pm    Post subject: unmerge Reply with quote

Just out of curiosity, i keep seeing how people say that they "broke" package B by uninstalling package A which B depends on. Why are dependancies not checked on uninstalation?

PrOxY
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static
Tux's lil' helper
Tux's lil' helper


Joined: 18 Apr 2002
Posts: 141
Location: Canada

PostPosted: Tue Apr 23, 2002 5:56 pm    Post subject: Reply with quote

Because that means checking the dependancies of EVERYTHING on the system!
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Apprentice
Apprentice


Joined: 20 Apr 2002
Posts: 253
Location: Chantilly, VA

PostPosted: Tue Apr 23, 2002 6:38 pm    Post subject: of course Reply with quote

of course it would, other package systems do this, so it is obviously doable. It is just a matter of the data structure you store your information in. An oversimplified solution would be to organize the data in a "dependancy tree" packages that depend on another would be child nodes of that package. Then to check if there is a dependancy problem, you would simply traverse to the package in question. Then recursivly check if any child nodes are installed. The area which this is over simplified is when packages have many dependancies that cross over each other and the like....but it is doable, and really should be looked into.

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