#2441: Ghc-pkg cannot unregister/expose/hide packages in non-first package
databases
-------------------------------+--------------------------------------------
Reporter: batterseapower | Owner:
Type: bug | Status: new
Priority: normal | Component: Build System
Version: 6.9 | Severity: normal
Keywords: | Testcase:
Architecture: Unknown | Os: Unknown
-------------------------------+--------------------------------------------
I was in this situation:
{{{
$ ghc-pkg list
/usr/local/lib/ghc-6.8.2/package.conf:
Cabal-1.2.3.0, Cabal-1.5.1, Finance-Quote-Yahoo-0.4.1,
GLUT-2.1.1.1, HTTP-3001.0.4, HTTP-Simple-0.1, HUnit-1.2.0.0,
OpenAL-1.3.1.1, QuickCheck-1.1.0.0, array-0.1.0.0, base-3.0.1.0,
binary-0.4.1, bytestring-0.9.0.1, cgi-3001.1.5.1,
containers-0.1.0.1, directory-1.0.0.0, fgl-5.4.1.1,
filepath-1.1.0.0, (ghc-6.8.2), haskell-src-1.0.1.1,
haskell98-1.0.1.0, hpc-0.5.0.0, html-1.0.1.1, hxt-7.4, mtl-1.1.0.0,
network-2.1.0.0, old-locale-1.0.0.0, old-time-1.0.0.0,
packedstring-0.1.0.0, parallel-1.0.0.0, parsec-2.1.0.0,
plugins-1.0, plugins-1.1, pretty-1.0.0.0, process-1.0.0.0,
random-1.0.0.0, readline-1.0.1.0, regex-base-0.72.0.1,
regex-compat-0.71.0.1, regex-posix-0.72.0.2, rts-1.0, stm-2.1.1.0,
template-haskell-2.2.0.0, time-1.1.2.0, unix-2.3.0.0,
xhtml-3000.0.2.1, zlib-0.4.0.4
/Users/mbolingbroke/.ghc/i386-darwin-6.8.2/package.conf:
Cabal-1.4.0.0, GLUT-2.1.1.1, HDBC-1.1.4, MaybeT-0.1.1,
MonadRandom-0.1.1, OpenGL-2.2.1.1, Stream-0.2.3, arrows-0.4,
category-extras-0.53.4, haddock-2.1.0
}}}
And from there I can do this:
{{{
$ ../../../../ghc.plugins/utils/ghc-pkg/ghc-pkg-inplace describe pan-
plugin-annotations
name: pan-plugin-annotations
version: 1.0
license: BSD3
copyright: (c) Sean Seefried 2008
maintainer: [EMAIL PROTECTED]
stability: stable
homepage:
...
}}}
But not this!
{{{
$ ../../../../ghc.plugins/utils/ghc-pkg/ghc-pkg-inplace expose pan-plugin-
annotations-1.0
ghc-pkg-inplace: cannot find package pan-plugin-annotations-1.0
}}}
Or this:
{{{
$ ../../../../ghc.plugins/utils/ghc-pkg/ghc-pkg-inplace hide pan-plugin-
annotations-1.0
ghc-pkg-inplace: cannot find package pan-plugin-annotations-1.0
}}}
The reason is that ghc-pkgs modifyPackage function only looks in the FIRST
package database in the list. In my opinion, it should look in all
databases and either:
1. Perform the modification requested by the user to the first database
that contains the relevant package
2. Show a smart error message indicating to the user that they need to use
some flags to bring that package to the front of the package stack if they
want to do that, rather than just saying "not found"
I've attached a patch that implements behaviour 1.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2441>
GHC <http://www.haskell.org/ghc/>
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