Personal nix flake templates for easy dev environments

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To initialize (where ${ENV} is listed in the table below):

nix flake init --template github:dnswd/dev-templates#${ENV}

Here's an example (for the rust template):

# Initialize in the current project
nix flake init --template github:dnswd/dev-templates#rust

# Create a new project
nix flake new --template github:dnswd/dev-templates#rust ${NEW_PROJECT_DIRECTORY}

Or you can add this line directly into .envrc:

use flake "github:dnswd/dev-templates?dir=${ENV}"

By directly declaring flakes in the .envrc you can compose multiple flakes:

use flake "github:dnswd/dev-templates?dir=python"
use flake "github:dnswd/dev-templates?dir=cpp"

Composing flakes may not always be the best idea, as Nix honors the flake listed last in case of a clash, for example in the case of two buildInputs named cargo that refer to different versions of Cargo.

How to use the templates

Once your preferred template has been initialized, you can use the provided shell in two ways:

1. If you have nix-direnv installed, you can initialize the environment by running direnv allow.
2. If you don't have nix-direnv installed, you can run nix develop to open up the Nix-defined shell.

Available templates

Language/framework/tool	Template
Clojure	clojure
Cue	cue
Dhall	dhall
Elixir	elixir
Elm	elm
Gleam	gleam
Go	go
Hashicorp tools	hashi
Java	java
Kotlin	kotlin
Nickel	nickel
Nim	nim
Nix	nix
Node.js	node
OCaml	ocaml
Open Policy Agent	opa
PHP	php
Protobuf	protobuf
Purescript	purescript
Ruby	ruby
Rust	rust
Scala	scala
Zig	zig

Template contents

The sections below list what each template includes. In all cases, you're free to add and remove packages as you see fit; the templates are just boilerplate.

clojure

• Clojure 1.11.1.1149
• Boot 2.8.3
• Leiningen 2.9.8

cue

• Cue 0.4.3
• nix-cue

dhall

• Dhall 1.40.2
• dhall-bash
• dhall-csv (Linux only)
• dhall-docs
• dhall-json
• dhall-lsp-server
• dhall-nix
• dhall-nixpkgs
• dhall-openapi
• dhall-text (Linux only)
• dhall-toml
• dhall-yaml

elixir

• Elixir 1.13.4, including mix and IEx
• gigalixir (Linux only)

elm

• Elm 0.19.1
• elm2nix 0.2.1

gleam

• Gleam 0.22.1

go

• Go 1.19
• Standard Go tools (goimports, godoc, and others)
• golangci-lint

hashi

• Packer 1.8.2
• Terraform 1.2.7
• Nomad 1.2.9
• Vault 1.11.2
• nomad-autoscaler 0.3.6-dev
• nomad-pack 0.0.1-techpreview.3
• levant 0.3.1-dev
• damon
• Terragrunt 0.37.0
• tflint 0.39.3

haskell

• GHC 9.0.2
• cabal 3.6.2.0

java

• Java 17.0.3
• Maven 3.8.5
• Gradle 7.5
• Ant 1.10.11

kotlin

• Kotlin 1.7.10-release-333
• Gradle 7.5

nickel

• Nickel 0.2.0

nim

• Nim 1.6.6
• nimble 0.13.1

nix

• Cachix 0.8.1
• dhall-to-nix 1.1.23
• lorri
• niv
• nixfmt
• statix
• vulnix

node

• Node.js 18.7.0
• npm 8.15.0
• pnpm 7.9.1
• Yarn 1.22.19
• node2nix 1.11.1

ocaml

• OCaml 4.13.1
• Dune 3.4.1
• odoc 2.1.1
• ocamlformat 0.24.0

opa

• Open Policy Agent 0.43.0
• Conftest 0.34.0

php

• PHP 8.1.10
• Composer 2.4.2

protobuf

• The Buf CLI 1.7.0
• protoc 3.19.4

purescript

• Purescript
• Spago
• purescript-language-server
• purs-tidy

python

• Python 3.11.0rc1
• pip 22.1.2
• Virtualenv 20.15.1
• mach-nix

ruby

• Ruby 3.1.2p20, plus the standard Ruby tools (bundle, gem, etc.)

rust

• Rust, including cargo, Clippy, and the other standard tools. The Rust version is determined as follows, in order:

  • From the rust-toolchain.toml file if present
  • From the rust-toolchain file if present
  • Version 1.63.0 if neither is present

• rust-analyzer 2022-08-01

• cargo-audit 0.17.0

• cargo-deny 0.12.1

• cross 0.2.4

scala

• Scala 3.1.0 (Java 17.0.3)
• sbt 1.7.1

zig

• Zig 0.9.1

Code organization

All of the templates have only the root flake as a flake input. That root flake provides a common revision of Nixpkgs and flake-utils to all the templates.