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OBS-URL: https://build.opensuse.org/package/show/devel:languages:haskell/ghc-lens?expand=0&rev=1
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23
.gitattributes
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.gitattributes
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## Default LFS
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*.7z filter=lfs diff=lfs merge=lfs -text
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*.bsp filter=lfs diff=lfs merge=lfs -text
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*.bz2 filter=lfs diff=lfs merge=lfs -text
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*.gem filter=lfs diff=lfs merge=lfs -text
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*.gz filter=lfs diff=lfs merge=lfs -text
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*.jar filter=lfs diff=lfs merge=lfs -text
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*.lz filter=lfs diff=lfs merge=lfs -text
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*.lzma filter=lfs diff=lfs merge=lfs -text
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*.obscpio filter=lfs diff=lfs merge=lfs -text
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*.oxt filter=lfs diff=lfs merge=lfs -text
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*.pdf filter=lfs diff=lfs merge=lfs -text
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*.png filter=lfs diff=lfs merge=lfs -text
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*.rpm filter=lfs diff=lfs merge=lfs -text
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*.tbz filter=lfs diff=lfs merge=lfs -text
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*.tbz2 filter=lfs diff=lfs merge=lfs -text
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*.tgz filter=lfs diff=lfs merge=lfs -text
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*.ttf filter=lfs diff=lfs merge=lfs -text
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*.txz filter=lfs diff=lfs merge=lfs -text
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*.whl filter=lfs diff=lfs merge=lfs -text
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*.xz filter=lfs diff=lfs merge=lfs -text
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*.zip filter=lfs diff=lfs merge=lfs -text
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*.zst filter=lfs diff=lfs merge=lfs -text
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1
.gitignore
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1
.gitignore
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.osc
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5
ghc-lens.changes
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5
ghc-lens.changes
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-------------------------------------------------------------------
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Thu Aug 2 16:29:51 UTC 2018 - psimons@suse.com
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- Add lens at version 4.17.
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195
ghc-lens.spec
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ghc-lens.spec
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#
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# spec file for package ghc-lens
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#
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# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
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#
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# All modifications and additions to the file contributed by third parties
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# remain the property of their copyright owners, unless otherwise agreed
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# upon. The license for this file, and modifications and additions to the
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# file, is the same license as for the pristine package itself (unless the
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# license for the pristine package is not an Open Source License, in which
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# case the license is the MIT License). An "Open Source License" is a
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# license that conforms to the Open Source Definition (Version 1.9)
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# published by the Open Source Initiative.
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# Please submit bugfixes or comments via http://bugs.opensuse.org/
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#
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%global pkg_name lens
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%bcond_with tests
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Name: ghc-%{pkg_name}
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Version: 4.17
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Release: 0
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Summary: Lenses, Folds and Traversals
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License: BSD-2-Clause
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Group: Development/Libraries/Haskell
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URL: https://hackage.haskell.org/package/%{pkg_name}
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Source0: https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
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BuildRequires: ghc-Cabal-devel
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BuildRequires: ghc-array-devel
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BuildRequires: ghc-base-orphans-devel
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BuildRequires: ghc-bifunctors-devel
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BuildRequires: ghc-bytestring-devel
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BuildRequires: ghc-cabal-doctest-devel
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BuildRequires: ghc-call-stack-devel
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BuildRequires: ghc-comonad-devel
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BuildRequires: ghc-containers-devel
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BuildRequires: ghc-contravariant-devel
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BuildRequires: ghc-distributive-devel
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BuildRequires: ghc-exceptions-devel
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BuildRequires: ghc-filepath-devel
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BuildRequires: ghc-free-devel
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BuildRequires: ghc-hashable-devel
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BuildRequires: ghc-kan-extensions-devel
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BuildRequires: ghc-mtl-devel
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BuildRequires: ghc-parallel-devel
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BuildRequires: ghc-profunctors-devel
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BuildRequires: ghc-reflection-devel
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BuildRequires: ghc-rpm-macros
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BuildRequires: ghc-semigroupoids-devel
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BuildRequires: ghc-semigroups-devel
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BuildRequires: ghc-tagged-devel
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BuildRequires: ghc-template-haskell-devel
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BuildRequires: ghc-text-devel
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BuildRequires: ghc-th-abstraction-devel
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BuildRequires: ghc-transformers-compat-devel
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BuildRequires: ghc-transformers-devel
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BuildRequires: ghc-unordered-containers-devel
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BuildRequires: ghc-vector-devel
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BuildRequires: ghc-void-devel
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%if %{with tests}
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BuildRequires: ghc-HUnit-devel
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BuildRequires: ghc-QuickCheck-devel
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BuildRequires: ghc-deepseq-devel
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BuildRequires: ghc-directory-devel
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BuildRequires: ghc-doctest-devel
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BuildRequires: ghc-generic-deriving-devel
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BuildRequires: ghc-nats-devel
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BuildRequires: ghc-simple-reflect-devel
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BuildRequires: ghc-test-framework-devel
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BuildRequires: ghc-test-framework-hunit-devel
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BuildRequires: ghc-test-framework-quickcheck2-devel
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BuildRequires: ghc-test-framework-th-devel
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%endif
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%description
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This package comes "Batteries Included" with many useful lenses for the types
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commonly used from the Haskell Platform, and with tools for automatically
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generating lenses and isomorphisms for user-supplied data types.
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The combinators in 'Control.Lens' provide a highly generic toolbox for
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composing families of getters, folds, isomorphisms, traversals, setters and
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lenses and their indexed variants.
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An overview, with a large number of examples can be found in the
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<https://github.com/ekmett/lens#lens-lenses-folds-and-traversals README>.
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An introductory video on the style of code used in this library by Simon Peyton
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Jones is available from
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<http://skillsmatter.com/podcast/scala/lenses-compositional-data-access-and-manipulation
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Skills Matter>.
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A video on how to use lenses and how they are constructed is available on
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<http://youtu.be/cefnmjtAolY?hd=1 youtube>.
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Slides for that second talk can be obtained from
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<http://comonad.com/haskell/Lenses-Folds-and-Traversals-NYC.pdf comonad.com>.
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More information on the care and feeding of lenses, including a brief tutorial
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and motivation for their types can be found on the
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<https://github.com/ekmett/lens/wiki lens wiki>.
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A small game of 'pong' and other more complex examples that manage their state
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using lenses can be found in the
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<https://github.com/ekmett/lens/blob/master/examples/ example folder>.
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/Lenses, Folds and Traversals/
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With some signatures simplified, the core of the hierarchy of lens-like
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constructions looks like:
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<<http://i.imgur.com/ALlbPRa.png>>
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<Hierarchy.png (Local Copy)>
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You can compose any two elements of the hierarchy above using '(.)' from the
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'Prelude', and you can use any element of the hierarchy as any type it linked
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to above it.
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The result is their lowest upper bound in the hierarchy (or an error if that
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bound doesn't exist).
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For instance:
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* You can use any 'Traversal' as a 'Fold' or as a 'Setter'.
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* The composition of a 'Traversal' and a 'Getter' yields a 'Fold'.
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/Minimizing Dependencies/
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If you want to provide lenses and traversals for your own types in your own
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libraries, then you can do so without incurring a dependency on this (or any
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other) lens package at all.
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/e.g./ for a data type:
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> data Foo a = Foo Int Int a
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You can define lenses such as
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> -- bar :: Lens' (Foo a) Int > bar :: Functor f => (Int -> f Int) -> Foo a ->
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f (Foo a) > bar f (Foo a b c) = fmap (a' -> Foo a' b c) (f a)
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> -- quux :: Lens (Foo a) (Foo b) a b > quux :: Functor f => (a -> f b) -> Foo
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a -> f (Foo b) > quux f (Foo a b c) = fmap (Foo a b) (f c)
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without the need to use any type that isn't already defined in the 'Prelude'.
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And you can define a traversal of multiple fields with
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'Control.Applicative.Applicative':
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> -- traverseBarAndBaz :: Traversal' (Foo a) Int > traverseBarAndBaz ::
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Applicative f => (Int -> f Int) -> Foo a -> f (Foo a) > traverseBarAndBaz f
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(Foo a b c) = Foo <$> f a <*> f b <*> pure c
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What is provided in this library is a number of stock lenses and traversals for
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common haskell types, a wide array of combinators for working them, and more
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exotic functionality, (/e.g./ getters, setters, indexed folds, isomorphisms).
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%package devel
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Summary: Haskell %{pkg_name} library development files
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Group: Development/Libraries/Haskell
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Requires: %{name} = %{version}-%{release}
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Requires: ghc-compiler = %{ghc_version}
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Requires(post): ghc-compiler = %{ghc_version}
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Requires(postun): ghc-compiler = %{ghc_version}
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%description devel
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This package provides the Haskell %{pkg_name} library development files.
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%prep
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%setup -q -n %{pkg_name}-%{version}
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%build
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%ghc_lib_build
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%install
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%ghc_lib_install
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%check
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%cabal_test
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%post devel
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%ghc_pkg_recache
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%postun devel
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%ghc_pkg_recache
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%files -f %{name}.files
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%license LICENSE
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%files devel -f %{name}-devel.files
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%doc AUTHORS.markdown CHANGELOG.markdown README.markdown examples
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%changelog
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3
lens-4.17.tar.gz
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3
lens-4.17.tar.gz
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version https://git-lfs.github.com/spec/v1
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oid sha256:473664de541023bef44aa29105abbb1e35542e9254cdc846963183e0dd3f08cc
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size 991660
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