add ghc-dirstream

ajatt/packages/haskell.scm

@@ -1927,4 +1927,61 @@ IEEE Std.  1003.1). .  The package is not supported under Windows.")
    (license license:bsd-3)))
 
 
-ghc-libarchive
+(define-public ghc-pipes-safe
+  (package
+    (name "ghc-pipes-safe")
+    (version "2.3.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (hackage-uri "pipes-safe" version))
+       (sha256
+        (base32 "13npagy597g6zfr2f3vj4a98h2ssg2ps7lmdzrgdsvm8m28x3cph"))))
+    (build-system haskell-build-system)
+    (properties '((upstream-name . "pipes-safe")))
+    (inputs (list ghc-transformers-base ghc-monad-control ghc-primitive
+                  ghc-pipes))
+    (arguments
+     `(#:cabal-revision ("3"
+                         "1wic8km3c17g2xrmxd4qj5qmppb76k7srxrgj8jg1vs6g2l7v6cs")))
+    (home-page "http://hackage.haskell.org/package/pipes-safe")
+    (synopsis "Safety for the pipes ecosystem")
+    (description
+     "This package adds resource management and exception handling to the @@pipes@@
+ecosystem. .  Notable features include: . * /Resource Safety/: Guarantee
+finalization using @@finally@@, @@bracket@@ and more . * /Exception Safety/:
+Even against asynchronous exceptions! . * /Laziness/: Only acquire resources
+when you need them . * /Promptness/: Finalize resources early when you are done
+with them . * /Native Exception Handling/: Catch and resume from exceptions
+inside pipes . * /No Buy-in/: Mix resource-safe pipes with unmanaged pipes using
+@@hoist@@.")
+    (license license:bsd-3)))
+
+(define-public ghc-dirstream
+  (package
+    (name "ghc-dirstream")
+    (version "1.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (hackage-uri "dirstream" version))
+       (sha256
+        (base32 "1xnxsx1m06jm8yvim1xnvfkwylhyab51wvba1j3fbicy4ysblfz0"))))
+    (build-system haskell-build-system)
+    (properties '((upstream-name . "dirstream")))
+    (inputs (list ghc-system-filepath ghc-system-fileio ghc-pipes
+                  ghc-pipes-safe))
+    (arguments
+     `(#:cabal-revision ("2"
+                         "0k4nzimxqc6a47a16yysh39m4vjy9pbyi3j7lygrnaz780c338kc")))
+    (home-page "http://hackage.haskell.org/package/dirstream")
+    (synopsis "Easily stream directory contents in constant memory")
+    (description
+     "Use this library to read large directories as streams: . * Use @code{@@ListT}@@
+to assemble recursive directory traversals while still streaming . * Use
+@@pipes@@ to read out the stream of results . * Traversals only open directory
+streams lazily in response to demand . * Avoid directories with insufficient
+permissions .  This library works on both Unix and Windows.")
+    (license license:bsd-3)))
+
+ghc-dirstream