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mention --constraint flag in error essage when dep planning fails #686

bos opened this Issue · 2 comments

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(Imported from Trac #694, reported by @dcoutts on 2010-05-31)

Dependency planning problems can often be solved by running with --dry-run -v, seeing what the planner is selecting and forcing it to make different choices using the --constraint flag.

When dependency planning fails with particular kinds of constraint problem, it may be useful to users to mention this. We should check if this advice applies to all cases where the dep planner fails, or if its only appropriate for certain classes of failure.


(Imported comment by @kosmikus on 2010-05-31)

The modular solver gives quite different kinds of error messages. We should revisit the issue of providing good feedback on dependency failure. But I don't think it can generally be reduced to suggesting a particular --constraint flag.


(Imported comment by @kosmikus on 2012-03-05)

Unclear what to do here (if anything).

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