database install

This changes how the SCOPE_OF_INSTALLATION variable is used to provide
an alternate way of running bootstrap.sh which can install
cabal-install to a separate prefix and package database without
altering the user's package database or using it. The idea with this
is to improve the repeatability of automatically installing ghc, cabal
and other haskell independently of the current standard installation
or the user's main package database.

Usage example:

ghc-pkg init /home/jake/test_cabal/
SCOPE_OF_INSTALLATION='--global --package-db=/home/jake/test_cabal/packagedb' PREFIX=/home/jake/test_cabal/prefix ./bootstrap.sh

If you don't override the SCOPE_OF_INSTALLATION variable, bootstrap.sh
works as before.

tarballs if these tarballs are already present.

A couple of settings were filtered out since
74cb2909 including
`configure-option`. However, it turns out you may want to
persist some options to `configure`, such as e.g.

  --configure-option=--build=x86_64-w64-mingw32

when working in a Cygwin host environment, but using a Mingw
toolchain (such as the one bundled with the Windows GHC bindist).

Approved by @dcoutts

And move to 'D.S.Utils'.

David Feuer authored Sep 27, 2014 and Mikhail Glushenkov committed Sep 27, 2014

'[drop,take]WhileEnd p' is semantically the same as 'reverse . [drop,take]While
p . reverse', but more efficient and easier to read.

Data.Bits: bitSize -> finiteBitSize

"-czf" must go first.

'Setup.hs sdist': invoke 'tar' with '--format ustar' if possible.

Fixes #1901. Some variants of 'tar' don't support the '--format' option, so we
have to do feature detection.

Note that 'cabal sdist' (as opposed to 'Setup.hs sdist') uses the built-in
tar.gz archiver ('Distribution.Client.Tar') and doesn't invoke 'tar' or 'gzip'.

System.Win32.DLL import seems redunant

This reverts commit f59bab10.

Revert "Switch InstallPlan over to using IPID-indexed PackageIndex."

This reverts commit 6465d174.

1. When we union PackageIndexes together, prefer the later one.
   This idiom is used when we update the processing-state of
   packages in an InstallPlan.

2. dependencyInconsistencies' was missing a number of indirections
   through the fakeMap, so in some cases we incorrectly concluded
   packages were not equal when they were.

3. We need to initialize the fakeMap with any pre-installed packages,
   otherwise the invariant check for configured-packages will fail.

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

Bash completion for "cabal sandbox" subcommands

Generate object files for older versions of GHC

Switch InstallPlan over to using IPID-indexed PackageIndex

This works around GHC bug #8942, for the versions of GHC which are
affected by this bug.

Stop repeated rebuilds on Travis

Changing the build config format causes cabal-install to repeatedly
rebuild the Cabal library during the configure->build->test cycle.

bootstrap: fix network vsn regex typo

NETWORKURI_VER_REGEXP should be NETWORK_URI_VER_REGEXP

Support module thinning and renaming Cabal-side.

Travis failure is due to https://github.com/haskell/cabal/issues/2114

Unlike GHC, Cabal will still try to find a globally consistent choice for
all package names, i.e. this does *not* implement private dependencies.

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

Allow random-1.1

Update bootstrap.sh

This fixes issue #1945 and replaces pull request #1947.

These bugs in #1947 are fixed:
* The pull request no longer applied cleanly to master because of the
  Binary LocalBuildInfo patches.
* The new test cases did not put the generated HPC interface files under
  "dist/", so the files weren't cleanup up correctly.
* HPC interface files for each component need to be separated, but the
  were being combined into the same directory.

These enhancements are also implemented:
* Program coverage is now used for all components when enabled and the
  flag --enable-library-coverage has been changed to --enable-coverage.
* A helpful error message is printed if the obsolete flag
  --enable-library-coverage is used.