Compute profiling/shared based on library deps only.

Previously we'd build Cabal and custom setup dependencies
with profiling even though it wasn't necessary. Using a
refined dependency graph fixes the problem.

If looking at a Graph with different set of neighbors becomes
a common op, maybe we should add some functions to handle
this specific case.

Fixes #3789.

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

Track pkg-config deps in hash, fixes #3493.

Change default logfile template to use more unique name

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

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

The key idea is that we define:

    type IO a = HasCallStack => Prelude.IO a

and voila, call stacks are maintained across all IO!  You can
look at the stacks using -v"debug +callstack".

There are a number of IO functions for which the call stack is
never used.  They are explicitly annotated using NoCallStackIO.
Maybe some day they will use call stacks and we can change their
types.  Similarly, there are a number of functions which do
have type IO, but then suppress the redundant constraint error
using "_ = callStack". Maybe some day we will attach call
stacks to the exceptions we throw.

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

This patch uses CallStack support in GHC 7.10 and GHC 8.0 to make
it possible to get stack traces when we log output.

This is the bare minimum to make this patch useful: there is
plenty of tuning that can be done.  For example:

* Insertions of withFrozenCallStack can help make the "callsite" output
  more useful, though be careful, we lose all stack information at that point!

* Insertions of 'WithVerbosity', which will let us get deeper stacks
  (at the moment, they are basically always 1-deep.)

Fixes #3768.

CC @23Skidoo



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

Tested by building glib and eyeballing cabal-hashes.txt.

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

Specifically, this changes the default from `.../$pkgid.log`
to `.../$compiler/$libname.log`, which avoids logfiles overwriting
each other even though theyty refer to different artifacts, as well
as aligning the format with `~/.cabal/store`'s structure.

This addresses #3807

This reverts commit 798470a7.

Add support for executables to DSL, and failing test for #3775

Now that we have Sphinx docs, it is REALLY out of date.

Fixes #1171.

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

Deduplicate nodeNeighbors in legacy codepath.

Add 'WeightedPSQ' and use it to sort package, flag, and stanza choices.

Error messages for package locations

Prevents us from trying to build a package multiple times,
when we should only build it once.

This is basically 15dd8455

 all
over again, but for the legacy codepath.

Fixes #3721.

CC @tuncer

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

This commit undoes a change from c0a48602 that filtered out build-depends
entries that matched the names of executable components.

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

Axe cabalPackageCacheDirectory, use projectConfigCacheDir, fixing #3392

Remove deprecated/obsolete projectConfigWorldFile, fixes #3749.

Make default install plan printing more chatty

D.C.SrcDist: pass builddir to the setup script.

SetupWrapper: separate determining and running Setup

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

Say a bit more about vendoring in local packages, CC @winterland1989

Fixes #3794.

Add optimization level to build directory structure.

I am not sure why the original code did something insane,
which may indicate a lurking bug.

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

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

The two phases of setupWrapper (configuration and execution) are
separated into the getSetup and runSetup functions. This allows us to
skip configuration if the setup method is known; this is the case when
running multiple commands in sequence or in the new-build
system. Splitting the phases also allows us to choose which _command_ to
run based on the Cabal version in use; setupWrapper demands a fixed
choice of command and only allows the command _flags_ to vary depending
on the version.

Deduplicate build targets by storing them in a set.

Deprecate ProgramConfiguration et al.

This patch defines 3 short linkeners,

    extlinks = {
      'issue': ('https://github.com/haskell/cabal/issues/%s', '#'),
      'ghc-wiki': ('http://ghc.haskell.org/trac/ghc/wiki/%s', ''),
      'ghc-ticket': ('http://ghc.haskell.org/trac/ghc/ticket/%s', 'GHC #'),
    }

See http://www.sphinx-doc.org/en/stable/ext/extlinks.html for more
information as well as this diff for examples on how to use them.

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