PUBLIC
Unfortunately, that would take quite some extra effort. However, I think I have
figured this out in the meantime: it seems it wasn't the FinderCache that
needed invalidating, but the ModuleGraph. So now I have the following code for
changing the home unit:
```
setHomeUnit :: (GhcMonad m) => UnitId -> m ()
setHomeUnit unitId = do
modifySession $ \env -> env
{ hsc_dflags = (hsc_dflags env)
{ homeUnitId = unitId
}
}
invalidateModSummaryCache
invalidateModSummaryCache :: (GhcMonad m) => m ()
invalidateModSummaryCache = modifySession $ \env -> env
{ hsc_mod_graph = invalidateMG (hsc_mod_graph env)
}
where
invalidateMG = mapMG invalidateMS
invalidateMS ms = ms{ ms_hs_date = addUTCTime (-1) (ms_hs_date ms) }
```
Here, `invalidateModSummaryCache` is based on the one in the `GHC` module which
doesn't export it.
With the addition of `invalidateModSummaryCache` to `setHomeUnit`, I can now
import `MyLib` from `Test` without using a package-qualified import. Adding or
removing a `flushFinderCaches` call doesn’t seem to change anything.
-----Original Message-----
From: Matthew Pickering <matthewtpicker...@gmail.com>
Sent: Wednesday, June 30, 2021 6:11 PM
To: Erdi, Gergo <gergo.e...@sc.com>
Subject: [External] Re: Loading a typechecked module and then using it
immediately as a package
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Could you provide the code which is failing? Then it will be easier to fix.
On Tue, Jun 29, 2021 at 12:00 PM Erdi, Gergo <gergo.e...@sc.com> wrote:
>
> PUBLIC
>
> Should I? OK, I just tried calling `flushFinderCaches` after I change the
> home unit to `mainUnitId`, but I still get exactly the same behaviour:
> `findInstalledHomeModule` returns `InstalledFound` and things go downhill
> from there.
>
> -----Original Message-----
> From: Matthew Pickering <matthewtpicker...@gmail.com>
> Sent: Tuesday, June 29, 2021 6:34 PM
> To: Erdi, Gergo <gergo.e...@sc.com>
> Cc: ghc-devs@haskell.org
> Subject: [External] Re: Loading a typechecked module and then using it
> immediately as a package
>
> ATTENTION: This email came from an external source. Do not open attachments
> or click on links from unknown senders or unexpected emails. Always report
> suspicious emails using the Report As Phishing button in Outlook to protect
> the Bank and our clients.
>
>
> Are you clearing the FinderCache?
>
> On Tue, Jun 29, 2021 at 11:14 AM Erdi, Gergo <gergo.e...@sc.com> wrote:
> >
> > PUBLIC
> >
> > I don't know yet what's going on, but one thing I did notice is that
> > `findInstalledHomeModule` returns `InstalledFound` for `MyLib`, which
> > doesn't sound right to me -- `MyLib` should come from the "fake-uid" unit,
> > and `Test` is typechecked in the `mainUnitId`.
> >
> > -----Original Message-----
> > From: Erdi, Gergo
> > Sent: Tuesday, June 29, 2021 5:51 PM
> > To: Matthew Pickering <matthewtpicker...@gmail.com>
> > Subject: Re: Loading a typechecked module and then using it immediately as
> > a package
> >
> > PUBLIC
> >
> > I tried moving `MyLib.hs` into a directory different than `Test.sh`, but
> > the error message still refers to its correct location! So this error is
> > not guessing the file name of where `MyLib.hs` could be loaded from;
> > instead, it seems to refer correctly to where the module (previously
> > loaded) was. Hmm.
> >
> > -----Original Message-----
> > From: Matthew Pickering <matthewtpicker...@gmail.com>
> > Sent: Tuesday, June 29, 2021 5:04 PM
> > To: Erdi, Gergo <gergo.e...@sc.com>
> > Subject: [External] Re: Loading a typechecked module and then using it
> > immediately as a package
> >
> >
> > Do you have a `MyLib.hs` source file? If you move that somewhere else
> > (another folder) then things might work?
> >
> > On Tue, Jun 29, 2021 at 9:41 AM Erdi, Gergo <gergo.e...@sc.com> wrote:
> > >
> > > PUBLIC
> > >
> > > What's weird about it is that if I print the `moduleNameProvidersMap`, I
> > > can see `MyLib` inside, and it looks no different than any other module
> > > from e.g. `ghc-prim` that I can import into `Test.hs` without any package
> > > qualification. Also, why does the error message refer to the file name
> > > `input/MyLib.hs`? Why does GHC even know that that is where it would have
> > > to be loaded from, if it weren't to be used from an already loaded
> > > package?
> > >
> >
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This email and any attachments are confidential and may also be privileged. If
you are not the intended recipient, please delete all copies and notify the
sender immediately. You may wish to refer to the incorporation details of
Standard Chartered PLC, Standard Chartered Bank and their subsidiaries at
https: //www.sc.com/en/our-locations
Where you have a Financial Markets relationship with Standard Chartered PLC,
Standard Chartered Bank and their subsidiaries (the "Group"), information on
the regulatory standards we adhere to and how it may affect you can be found in
our Regulatory Compliance Statement at https: //www.sc.com/rcs/ and Regulatory
Compliance Disclosures at http: //www.sc.com/rcs/fm
Insofar as this communication is not sent by the Global Research team and
contains any market commentary, the market commentary has been prepared by the
sales and/or trading desk of Standard Chartered Bank or its affiliate. It is
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purpose only and shall not be relied on for any other purpose and is subject to
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