lazy-async-1.0.0.0: lazy-async.cabal

cabal-version: 3.0

name: lazy-async
version: 1.0.0.0
synopsis: Asynchronous actions that don't start right away

description:

    Sometimes we have a bunch of 'IO' actions that do things like
    read files, make HTTP requests, or query a database. Some of the
    information that these actions produce might not end up being
    needed, depending on the breaks. In the interest of avoiding
    unnecessary effort, we don't want to simply run all the actions
    and collect their results upfront. We also don't want to simply
    run an action right before its result is needed, because it might
    be needed in more than one place, which opens the possibility of
    unnecessarily running the same action more than once. In
    situations like these, we use "LazyAsync".

    Under the hood, an 'IO' action is turned into a @LazyAsync@ by
    constructing two things: An @Async@ (from the @async@ package),
    and a @TVar Bool@ (from the @stm@ package). The TVar, initialized
    to @False@, indicates whether the action is wanted yet. The async
    thread waits until the TVar turns @True@ and then runs the action.

homepage:       https://github.com/typeclasses/lazy-async
bug-reports:    https://github.com/typeclasses/lazy-async/issues
author:         Chris Martin
maintainer:     Chris Martin, Julie Moronuki
copyright:      2021 Mission Valley Software LLC
license:        MIT
license-file:   license.txt
category:       Concurrency
build-type:     Simple

source-repository head
  type: git
  location: https://github.com/typeclasses/lazy-async

common language
    default-language:   Haskell2010
    ghc-options:        -Wall
    default-extensions: DeriveFoldable
    default-extensions: DeriveFunctor
    default-extensions: DeriveTraversable
    default-extensions: ExistentialQuantification
    default-extensions: FlexibleContexts
    default-extensions: NoImplicitPrelude
    default-extensions: StandaloneDeriving

common dependencies
    build-depends:      base              ^>= 4.14     || ^>= 4.15
    build-depends:      exceptions        ^>= 0.10.4
    build-depends:      lifted-async      ^>= 0.10.0.6
    build-depends:      monad-control     ^>= 1.0.2.3
    build-depends:      rank2classes      ^>= 1.4.0.1
    build-depends:      stm               ^>= 2.5
    build-depends:      transformers      ^>= 0.5.6.2
    build-depends:      transformers-base ^>= 0.4.5.1

common test-language
    import:             language
    default-extensions: BlockArguments
    default-extensions: OverloadedStrings
    default-extensions: TemplateHaskell

common test-dependencies
    import:             dependencies
    build-depends:      hedgehog          ^>= 1.0.4
    build-depends:      lazy-async
    build-depends:      optics-core       ^>= 0.3      || ^>= 0.4
    build-depends:      optics-th         ^>= 0.3      || ^>= 0.4

common test-modules
    other-modules:      Test.Counter
    other-modules:      Test.Exceptions
    other-modules:      Test.General
    other-modules:      Test.Optics
    other-modules:      Test.Person

common test
    import:             test-language, test-dependencies, test-modules

library
    import:             language, dependencies
    hs-source-dirs:     src
    exposed-modules:    LazyAsync
    other-modules:      LazyAsync.Actions
    other-modules:      LazyAsync.Actions.Empty
    other-modules:      LazyAsync.Actions.Memoize
    other-modules:      LazyAsync.Actions.Merge
    other-modules:      LazyAsync.Actions.Poll
    other-modules:      LazyAsync.Actions.Pure
    other-modules:      LazyAsync.Actions.Spawn
    other-modules:      LazyAsync.Actions.Start
    other-modules:      LazyAsync.Actions.StartWait
    other-modules:      LazyAsync.Actions.Wait
    other-modules:      LazyAsync.Libraries.Async
    other-modules:      LazyAsync.Libraries.Rank2
    other-modules:      LazyAsync.Orphans
    other-modules:      LazyAsync.Prelude
    other-modules:      LazyAsync.Types
    other-modules:      LazyAsync.Types.Complex
    other-modules:      LazyAsync.Types.LazyAsync
    other-modules:      LazyAsync.Types.NoAlternative
    other-modules:      LazyAsync.Types.Outcome
    other-modules:      LazyAsync.Types.Resource
    other-modules:      LazyAsync.Types.StartPoll
    other-modules:      LazyAsync.Types.Status

test-suite test
    import:             test
    hs-source-dirs:     test
    type:               exitcode-stdio-1.0
    main-is:            test.hs