Improve outdated ghc-pkg cache warning
Sometimes you get this:
WARNING: cache is out of date: /home/user/.ghc/x86_64-linux-7.8.3/package.conf.d/package.cache.
Use 'ghc-pkg recache' to fixThe warning is correct but a bit confusing, because running ghc-pkg recache does nothing here: It will by default update your global package DB, and the DB the warning is about will still be out of date.
This seems to have frustrated others as well: https://gist.github.com/mcandre/5789498
I suggest we make the message more clear: You might have to pass --user to update this cache file.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.8.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | ghc-pkg |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | nh2 |
| Operating system | |
| Architecture |