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Dhall Configuration Language VS NixOS

Compare Dhall Configuration Language VS NixOS and see what are their differences

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Dhall Configuration Language logo Dhall Configuration Language

A non-repetitive alternative to YAML

NixOS logo NixOS

25 Jun 2014 . All software components in NixOS are installed using the Nix package manager. Packages in Nix are defined using the nix language to create nix expressions.
  • Dhall Configuration Language Landing page
    Landing page //
    2022-04-27
  • NixOS Landing page
    Landing page //
    2023-09-12

Dhall Configuration Language features and specs

  • Deterministic
    Dhall is designed to be a deterministic configuration language, meaning that given the same input, it will always produce the same output. This ensures consistency and repeatability across environments.
  • Type-Safe
    Dhall includes a strong static type system, preventing many common errors associated with misconfigurations. Types are checked at compile time, ensuring configuration values meet specific criteria before deployment.
  • Total Programming Language
    Unlike many other configuration languages, Dhall is a total functional programming language, which means every program written in Dhall will terminate. This prevents infinite loops and other runtime issues.
  • Interoperability
    Dhall can generate JSON, YAML, and other data interchange formats, making it highly interoperable with existing systems that require these formats for configuration.
  • Modular
    Dhall allows for modular configuration files. You can define reusable components and import them across different configurations, promoting DRY (Don't Repeat Yourself) principles.

Possible disadvantages of Dhall Configuration Language

  • Learning Curve
    While Dhall is designed to be simple, the presence of a type system and functional programming concepts can present a learning curve to new users, especially those without a programming background.
  • Tooling Support
    Compared to more established languages, Dhall has less tooling support. Users might find fewer IDE extensions, plugins, or community libraries to assist in development.
  • Limited Ecosystem
    Being relatively new, Dhall has a smaller ecosystem that may lack the breadth of community contributions, such as templates and integration examples, found in more mature configuration languages.
  • Performance Overhead
    The type checking and interpretation of Dhall can introduce some performance overhead compared to more traditional configuration formats like JSON or YAML, which are simpler to parse.
  • Complexity for Simple Configurations
    For simple configurations, the added complexity of Dhall's type system and functional features may be unnecessary, leading to overhead without a clear benefit.

NixOS features and specs

  • Reproducibility
    NixOS ensures that the system configuration is entirely reproducible. Every package, configuration file, and system setting is defined in a single, declarative configuration file, enabling easy recreation of the environment on different machines or after clean installs.
  • Atomic Upgrades & Rollbacks
    Upgrades in NixOS are atomic, meaning they either complete successfully or not at all. Additionally, it is easy to rollback to previous configurations if something goes wrong, which adds a significant safety net during system updates.
  • Isolated Environments
    NixOS supports creating isolated development environments, preventing dependency conflicts and allowing developers to work with different versions of packages comfortably.
  • Package Management
    Nix, the package manager of NixOS, allows for the installation of multiple versions of the same software simultaneously without conflicts, facilitating experimentation and development.
  • Declarative Configuration
    All aspects of the NixOS system are configurable using a declarative language, making it easier to understand, share, and reproduce configurations compared to imperative setups.

Possible disadvantages of NixOS

  • Learning Curve
    NixOS and its package manager Nix have a steep learning curve, especially for users who are new to its declarative approach. Mastery requires a willingness to adopt a new mindset and learn new concepts.
  • Smaller Community
    Compared to more mainstream Linux distributions, NixOS has a smaller user and developer community, which can lead to fewer resources, tutorials, and community support options available for problem-solving.
  • Package Availability
    While Nixpkgs is extensive, there are occasions where certain packages may not be available or may not have the latest versions, requiring users to create their own packages or wait for updates.
  • Performance Overheads
    The guarantee of reproducibility and isolation can introduce performance overheads in some scenarios, particularly when dealing with build processes that have not been specifically optimized for Nix.
  • System Configuration Complexity
    The ability to configure everything declaratively can lead to complex and lengthy configuration files, which can be daunting and hard to manage as the complexity of the environment increases.

Dhall Configuration Language videos

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NixOS videos

First Impression of the NixOS Installation Procedure

More videos:

  • Review - Introduction to NixOS - Brownbag by Geoffrey Huntley
  • Review - NixOS 18.03 - A Configuration-focused GNU+Linux Distro

Category Popularity

0-100% (relative to Dhall Configuration Language and NixOS)
Configuration Management
100 100%
0% 0
Front End Package Manager
Software Development
100 100%
0% 0
Package Manager
0 0%
100% 100

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Reviews

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NixOS Reviews

The 10 Best Immutable Linux Distributions in 2024
Why it’s on the list: NixOS uses the Nix package manager, which treats packages as isolated from each other. This unique approach to package management virtually eliminates “dependency hell”.

Social recommendations and mentions

Based on our record, NixOS should be more popular than Dhall Configuration Language. It has been mentiond 266 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Dhall Configuration Language mentions (91)

  • Any program can be a GitHub Actions shell
    I'll give a shot at some guiding principals: 1. Do not use yaml. All github action logic should be written in a language that compiles to yaml, for example dhall (https://dhall-lang.org/). Yaml is an awful language for programmers, and it's a worse language for non-programmers. It's good for no one. 2. To the greatest extent possible, do not use any actions which install things. For example, don't use... - Source: Hacker News / 26 days ago
  • StrictYAML
    I'm a fan of anything that moves us away from stringly typed nonsense. See also Dhall (which can render to yaml). I like the idea but found the veneer broke a little too often and left me squinting at Haskell. https://dhall-lang.org/. - Source: Hacker News / about 2 months ago
  • Some Programming Language Ideas
    I think you're asking for Starlark (https://starlark-lang.org), a language that strongly resembles Python but isn't Turing-complete, originally designed at Google for use in their build system. There's also Dhall (https://dhall-lang.org), which targets configuration use cases; I'm less familiar with it. One problem is that, while non-Turing-completeness can be helpful for maintainability, it's not really... - Source: Hacker News / 4 months ago
  • 8 months of OCaml after 8 years of Haskell in production
    > Lambda calculus is as pure as can be, and also has terms that don't normalize. That is not considered a side effect. Many typed lambda calculi do normalise. You can also have a look https://dhall-lang.org/ for some pragmatic that normalises. > A better example of impurity in Haskell for pragmatic's sake is the trace function, that can be used to print debugging information from pure functions. Well, but that's... - Source: Hacker News / 5 months ago
  • Thoughts on ThoughtWorks Radar 2024
    I was first turned onto Pkl during my Dhall Trough of Disillusionment phase (Dhall is cool, but man is it hard) by James Ward. It looked to be a language that had enough types to compile YAML/JSON configuration files wayyyy more safely. I’ve had enough YAML/JSON misconfigurations break production, that I started looking into ways to compile those problems away, and Dhall helped a lot, but the learning curve and... - Source: dev.to / 6 months ago
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NixOS mentions (266)

  • Show HN: Node.js video tutorials where you can edit and run the code
    I'd love to create some Nix (https://nixos.org/) content. - Source: Hacker News / 10 days ago
  • 20 years of Git. Still weird, still wonderful
    NixOS may end up being "the last OS I ever use" (especially now that gaming is viable on it): https://nixos.org/ Check it out. The whitepaper's a fairly digestible read, too, and may get you excited about the whole concept (which is VERY different from how things are normally done, but ends up giving you guarantees). - Source: Hacker News / 26 days ago
  • Overengineer your CV
    For implementing the themes I have decided to use nix flakes since they allow each theme to specify their own dependencies and which command to run with the resulting JSON from the previous step as input. Another alternative could have been to use docker, but I wanted to learn more about nix. - Source: dev.to / about 2 months ago
  • Easy Development Environments
    One of the most tedious and time-wasting parts of the development process is setting up tooling. For a NodeJS project this requires getting the right Node version, getting the preferred package manager, installing things like a linter, formatter, and sometimes a compiler for TypeScript or other JS-transpiled languages. Well today we are going to talk about using Nix as an SDK/tool manager, and how we can setup... - Source: dev.to / about 2 months ago
  • Ask HN: Who is hiring? (February 2025)
    Zest Dermatology | Remote (USA residents only) | Full-time | Systems Administrator / Software Engineer | https://zesthealth.com Zest is a virtual dermatology clinic that delivers care for chronic eczema and psoriasis with a level of satisfaction and patient outcomes that are unheard of in conventional dermatology. What makes Zest particularly exciting is its value-based care business model, a topic worth... - Source: Hacker News / 3 months ago
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What are some alternatives?

When comparing Dhall Configuration Language and NixOS, you can also consider the following products

YAML - YAML 1.2 --- YAML: YAML Ain't Markup Language

GNU Guix - Like Nix but GNU.

Jsonnet - A powerful DSL for elegant description of JSON data.

Homebrew - The missing package manager for macOS

JSON - (JavaScript Object Notation) is a lightweight data-interchange format

asdf-vm - An extendable version manager