funflow-nix: Utility functions for using funflow with nix

This is a package candidate release! Here you can preview how this package release will appear once published to the main package index (which can be accomplished via the 'maintain' link below). Please note that once a package has been published to the main package index it cannot be undone! Please consult the package uploading documentation for more information.

[maintain] [Publish]

Warnings:

No 'category' field.

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.

[Skip to Readme]

Properties

Versions	0.1.0.0, 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]
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 2018-11-17T08:47:17Z

Modules

[Index]

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

Flags

Manual Flags

Name	Description	Default
example	Build the example executable	Disabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

Downloads

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

Maintainer's Corner

Package maintainers

mpickering

For package maintainers and hackage trustees

edit package information

Readme for funflow-nix-0.1.0.0

[back to package description]

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"]))