Cannot build on Windows

[mantkiew]

I am hoping to implement a find functionality which ignores globs specified in a .gitignore-like file. Unfortunately, on Windows I am getting an error since find-conduit depends on unix-2.7.0.1, which I cannot build.

cabal.exe: Package unix-2.7.0.1 can't be built on this system.
Failed to install unix-2.7.0.1
cabal.exe: Error: some packages failed to install:
find-conduit-0.4.1 depends on unix-2.7.0.1 which failed to install.
unix-2.7.0.1 failed during the building phase. The exception was:
ExitFailure 1

Is there a way to make the package cross-platform the same way as fsnotify?

EDIT: I see that only the executable depends on the unix package. I changed that to unix-compat but unfortunately, I am still getting the following (I'm on GHC 7.6.3 and HaskellPlatform 2013.2.0.0):

cabal.exe: Error: some packages failed to install:
chunked-data-0.1.0.1 depends on vector-instances-0.0.2.1 which failed to
install.
conduit-combinators-0.2.5.2 depends on vector-instances-0.0.2.1 which failed
to install.
find-conduit-0.4.1 depends on vector-instances-0.0.2.1 which failed to
install.
mono-traversable-0.6.0 depends on vector-instances-0.0.2.1 which failed to
install.
vector-instances-0.0.2.1 failed during the building phase. The exception was:
ExitFailure 1

[jwiegley]

Yes, it is my intention to make this package fully capable on Windows. At the moment it is using several optimizations which require Unix, but this will be made optional shortly.

[mantkiew]

After I changed unix to unix-compat, the problem seems to be only with vector-instances:

Configuring vector-instances-0.0.2.1...
Building vector-instances-0.0.2.1...
Preprocessing library vector-instances-0.0.2.1...
[1 of 1] Compiling Data.Vector.Instances ( Data\Vector\Instances.hs, dist\dist-sandbox-2b5adf9f\build\Data\Vector\Instan
ces.o )

Data\Vector\Instances.hs:26:10:
    Duplicate instance declarations:
      instance Functor Vector
        -- Defined at Data\Vector\Instances.hs:26:10
      instance Functor Vector -- Defined in `Data.Vector'

Data\Vector\Instances.hs:30:10:
    Duplicate instance declarations:
      instance Monad Vector -- Defined at Data\Vector\Instances.hs:30:10
      instance Monad Vector -- Defined in `Data.Vector'

Data\Vector\Instances.hs:38:10:
    Duplicate instance declarations:
      instance MonadPlus Vector
        -- Defined at Data\Vector\Instances.hs:38:10
      instance MonadPlus Vector -- Defined in `Data.Vector'

Data\Vector\Instances.hs:44:10:
    Duplicate instance declarations:
      instance Applicative Vector
        -- Defined at Data\Vector\Instances.hs:44:10
      instance Applicative Vector -- Defined in `Data.Vector'

Data\Vector\Instances.hs:55:10:
    Duplicate instance declarations:
      instance Alternative Vector
        -- Defined at Data\Vector\Instances.hs:55:10
      instance Alternative Vector -- Defined in `Data.Vector'

Data\Vector\Instances.hs:61:10:
    Duplicate instance declarations:
      instance Foldable Vector
        -- Defined at Data\Vector\Instances.hs:61:10
      instance Foldable Vector -- Defined in `Data.Vector'

Data\Vector\Instances.hs:71:10:
    Duplicate instance declarations:
      instance Traversable Vector
        -- Defined at Data\Vector\Instances.hs:71:10
      instance Traversable Vector -- Defined in `Data.Vector'
Failed to install vector-instances-0.0.2.1

Is that platform-specific?

[mantkiew]

Actually, here's the real source of the problem. I have HaskellPlatform 2013.2.0.0. After getting the sources (master) and changing unix to unix-compat, with a fresh sandbox, I get this first:

/d/projects/find-conduit 
$ cabal install
Resolving dependencies...
In order, the following would be installed:
base16-bytestring-0.1.1.6 (new package)
base64-bytestring-1.0.0.1 (new package)
blaze-builder-0.3.3.2 (new package)
dlist-0.7.0.1 (new package)
mwc-random-0.13.1.1 (new package)
nats-0.2 (new package)
semigroups-0.14 (new package)
dlist-instances-0.1 (new package)
system-filepath-0.4.11 (new package)
system-fileio-0.3.13 (new package)
tagged-0.7.2 (new package)
transformers-0.4.1.0 (new version)
mmorph-1.0.3 (new package)
mtl-2.2.0.1 (new version)
MonadRandom-0.1.13 (new package)
exceptions-0.6.1 (new package)
parsec-3.1.5 (new version)
network-2.5.0.0 (new version)
regex-base-0.93.2 (reinstall) changes: mtl-2.1.2 -> 2.2.0.1
regex-posix-0.95.2 (reinstall)
streaming-commons-0.1.2.4 (new package)
transformers-base-0.4.2 (new package)
monad-control-0.3.3.0 (new package)
lifted-base-0.2.2.2 (new package)
resourcet-1.1.2.2 (new package)
transformers-compat-0.3.2 (new package)
contravariant-0.6 (new package)
distributive-0.4.4 (new package)
comonad-4.2 (new package)
semigroupoids-4.0.2 (new package)
either-4.1.2 (new package)
unix-compat-0.4.1.1 (new package)
vector-algorithms-0.6.0.1 (new package)
vector-instances-0.0.2.1 (latest: 3.3) (new package)
mono-traversable-0.6.0 (new package)
chunked-data-0.1.0.1 (new package)
void-0.6.1 (new package)
conduit-1.1.2.1 (new package)
conduit-extra-1.1.0.3 (new package)
conduit-combinators-0.2.5.2 (new package)
find-conduit-0.4.1 (new package)
cabal.exe: The following packages are likely to be broken by the reinstalls:
regex-compat-0.95.1
haskell-platform-2013.2.0.0
Use --force-reinstalls if you want to install anyway.

Only then, after I try using --force-reinstalls, I am getting the problem with vector-instances from the previous comment. Is it possible to relax the dependencies so that it is compatible with the HaskellPlatform 2013.2.0.0?

[jwiegley]

Yes, I will change the dependencies to target the current HP.