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A note first: this patch does NOT modify the user-facing experience in Cabal
files; it only changes how we register information in the installed package
database.

This patch takes the exposed-modules and reexported-modules fields in
the InstalledPackageInfo structure and consolidates them into just the
exposed module fields, which now has a Maybe flag indicating if a
module is reexported and, if it is, what the original module was.  I've
also added in a field for signatures although it is currently unused.

The big benefit of this change is that it will make processing at the GHC level
much more uniform when we add signatures: signatures can also be reexported
and the new representation means we can share the code.
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Fixes #2198.

Switch InstallPlan over to using IPID-indexed PackageIndex.

Remove build-depends from pkgDescrFieldDescrs

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Fixes #2195.

cabal-install: Fix PackageTests using user's config

- add struct PackageTests.PackageTester.TestsPaths
- contains absolute paths for cabal, ghc, cabal-config
- refactor to consequently use this as input for all tests

Fixes #2078.

- previously, tests did not specify config file; default one in ~/.cabal/
  was used. test result depended on non-repository content.
- now, PackageTester has extra parameter for config-file to use.
- the default procedure now is to generate a default config file in
  "PackageTests/cabal-config" and use that.
- specific tests also are able to use non-default config.

That commit prevented 'sdist' from printing distribution quality warnings.

Fixes #1863.

Remove all references to Data.Version.versionTags

Avoids deprecation warnings when versionTags is deprecated in GHC 7.10
(GHC ticket #2496)

Fixes #2060.

And should be faster.

Edward Z. Yang authored Aug 26, 2014 and Mikhail Glushenkov committed Oct 23, 2014

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

This means that if 'hyperlink-source' is set to True, but the 'HsColour'
executable is not present, documentation will be still generated.

Note that 'cabal hscolour' will still exit with error in this case.

Make the default doc index file path compiler/arch/os-dependent.

Bertram Felgenhauer authored Sep 07, 2014 and Mikhail Glushenkov committed Oct 21, 2014

The motivation is to be able to say --constraint 'foo -none' to prevent
'foo' from being considered when installing packages. See #2092.

cabal-install: Add command 'cabal user-config diff'.

Fixes #2171.

The 'user-config' command allows pseudo-diff-ing and updating of the
user's ~/.cabal/config file. The diff is against what cabal would
generated if the user config file did not exist and the update
command overlays the user's existing settings over the current
version of the default settings and writes it back to ~/.cabal/config.

Closes: #2159

Remove support for Hugs and NHC98.

Remove the self-upgrade check.