In DynFlags there is a pkgDatabase field which should contain the
original packages database. I saw that it is never updated now and it
is always Nothing. In the same time Packages.initPackages is using it
to determine whether or not to read the package database from the
configuration files. In that way each call to Packages.initPackages
and respectively to GHC.setSessionDynFlags will cause database
reloading. In the PackageState there is a origPkgIdMap field which is
updated but never used after that.
Calling initPackages from setSessionDynFlags might be over
simplification here. I am calling setSessionDynFlags repeatedly but
without changing the packageFlags field. In this case it isn't
necessary to call initPackages. I hope it will not be too slow.
Cheers,
Krasimir
On 9/24/06, Ian Lynagh <[EMAIL PROTECTED]> wrote:
Mon Sep 18 18:24:48 PDT 2006 Simon Marlow <[EMAIL PROTECTED]>
* Packages cleanup, and allow new packages to be loaded with :set again
This cleans up the package subsystem a little. There are some
changes to the GHC API as a result.
- GHC.init and GHC.initFromArgs are no longer necessary.
- GHC.newSession takes the root of the GHC tree as an argument
(previously passed to GHC.init).
- You *must* do GHC.setSessionDynFlags after GHC.newSession,
this is what loads the package database.
- Several global vars removed from SysTools
- The :set command in GHCi can now cause new packages to be loaded,
or can hide/ignore existing packages.
M ./compiler/ghci/InteractiveUI.hs -19 +17
M ./compiler/ghci/Linker.lhs -1 +1
M ./compiler/main/CodeOutput.lhs -1 +1
M ./compiler/main/DriverPipeline.hs -4 +4
M ./compiler/main/DynFlags.hs -17 +17
M ./compiler/main/GHC.hs -43 +26
M ./compiler/main/Main.hs -17 +19
M ./compiler/main/Packages.lhs -149 +225
M ./compiler/main/SysTools.lhs -67 +14
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