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

Remove TODO mentioning top down solver

[ci skip]

Revert "Generalize HookedBuildInfo to work with any type of component."

fix exception handling of downloads in new-build

Don't test sdist in the main script.

See https://github.com/haskell/cabal/pull/3630#issuecomment-235438329.

[ci skip]

Test travis

This reverts commit af7bb537,
restoring 'HookedBuildInfo' backwards compatibility.

Download errors are now put into the residual install plan, like other
build errors.

Fixes issue #3387

Split things up a little so the generic async fetch can live with the
other fetch utils. This also makes it easier to test.

Change the exception handling so that any exception in fetching is
propagated when collecting the fetch result.

As a result of the previous InstallPlan refactoring, we can now use the
non-serialisable BuildFailure type from D.C.Types which uses
SomeException, where previously we had to use a copy of that type that
used String for the errors.

So now there's no longer any need to have a separate set of types for
BuildResult, BuildResults, BuildSuccess or BuildFailure. There was a
minor difference in the structure of the BuildSuccess, where in the new
build code we need to be able to produce the InstalledPackageInfo at a
different point from the rest of the info in the BuildSuccess. This can
be kept local to the ProjecBuilding module, but accounts for the
somewhat larger number of changes in that module.

PackageTests/Configure: Use zlib instead of X11.

Fixes (part of) #3623.

[ci skip]

Compat prelude

Make internal/self-exect setup methods more chatty.

Compile an actual executable, don't use `ghc -e` to provide gibberish
printing binary.

Installplan refactor

Add an IsNode instance for Either.

LocalBuildInfo: combine profiling settings, track program coverage

Edward Z. Yang authored Jul 24, 2016 and Duncan Coutts committed Jul 25, 2016

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

These were used previously for the Installed and Failed package states,
but these states are now gone.

Importantly this now means that we can have a serialisable InstallPlan
without the failure types having to be serialisable. This means we can
use things like SomeException which is not serialisable. Since the
traversal is done separately, the result of the traversal contains the
failure values, but this result set does not have to be serialised.