funflow-nix: Utility functions for using funflow with nix

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This library provides functions to create flows which run commands in environments created by nix commands. It is designed to be like the docker integration but the environments are created by nix rather than in a container.

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Modules

[Index]

Control
- Funflow
  - External
    - Control.Funflow.External.Nix

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Name	Description	Default
example	Build the example executable	Disabled

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funflow-nix-0.1.0.0.tar.gz [browse] (Cabal source package)
Package description (as included in the package)

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mpickering

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Candidates

0.1.0.0

Versions [RSS]	0.1.0.0
Change log	ChangeLog.md
Dependencies	base (>=4.10 && <5), funflow (>=1.4), funflow-nix, modern-uri, path, path-io, text [details]
Tested with	ghc ==8.2.2
License	BSD-3-Clause
Author	Matthew Pickering
Maintainer	matthewtpickering@gmail.com
Source repo	head: git clone https://github.com/mpickering/funflow-nix.git
Uploaded	by mpickering at 2018-11-17T08:53:54Z
Distributions
Executables	example
Downloads	693 total (4 in the last 30 days)
Rating	(no votes yet) [estimated by Bayesian average]
Your Rating	λ λ λ
Status	Docs uploaded by user [build log] All reported builds failed as of 2018-11-17 [all 1 reports]

Readme for funflow-nix-0.1.0.0

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funflow-nix provides functions for creating flows which run in a nix environment.

The library exposes the NixConfig data type which allows you to specify the environment and command to run. This is then turned into a flow using nix.

A complete example can be seen in examples/Simple.hs.

We can pin the version of nixpkgs we want to use by specifying a tarball to use as the source.

tarballSource :: NixpkgsSource
tarballSource = NixpkgsTarball [uri|https://github.com/NixOS/nixpkgs/archive/a19357241973538212b5cb435dde84ad25cbe337.tar.gz|]

nixConfig :: Environment -> NixConfig
nixConfig senv =
  NixShellConfig {
    environment = senv
    , command = "jq"
    , args = [ParamText "--version"]
    , env = []
    , stdout = StdOutCapture
    , nixpkgsSource = tarballSource
  }

Once the config has been specified. It can be turned into a flow by using the nix function.

jqVersionPkg :: SimpleFlow () String
jqVersionPkg = readString_ <<< nix (\() -> nixConfig (PackageList ["jq"]))