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Jsonnet VS Dhall Configuration Language

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

Jsonnet logo Jsonnet

A powerful DSL for elegant description of JSON data.

Dhall Configuration Language logo Dhall Configuration Language

A non-repetitive alternative to YAML
  • Jsonnet Landing page
    Landing page //
    2023-05-26
  • Dhall Configuration Language Landing page
    Landing page //
    2022-04-27

Jsonnet features and specs

  • Configurability
    Jsonnet allows you to write configurations as code, enabling dynamic configuration generation and making it easier to manage complex configurations.
  • Extensibility
    Jsonnet supports functions and imports, enabling code reuse and modular configuration design across different files and projects.
  • JSON Compatibility
    Since Jsonnet is a JSON extension, it is fully compatible with JSON, meaning any valid JSON file is also valid in Jsonnet.
  • Reduce Repetition
    Jsonnet reduces redundancy through capabilities like variables and functions, helping to avoid repetitive configurations and boilerplate.
  • Final Manifest
    Jsonnet outputs a final manifest in JSON, providing a clean and widely-accepted data format that can be used directly by applications.

Possible disadvantages of Jsonnet

  • Learning Curve
    Jsonnet introduces new syntax and concepts (such as mixins and imports) that may require time to learn and adapt to, especially for developers familiar with plain JSON.
  • Tooling Support
    While gaining traction, Jsonnet still has limited tooling and IDE support compared to more established configuration languages or file formats.
  • Complexity in Parsing
    As a more expressive configuration language, Jsonnet may introduce complexity in parsing and understanding configuration files compared to using straightforward JSON.
  • Overhead
    The additional features and functionalities of Jsonnet can introduce computational overhead, potentially making it slower than using simple JSON for very massive configurations.

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.

Jsonnet videos

Jsonnet

More videos:

  • Review - Using Jsonnet to Package Together Dashboards, Alerts and Exporters - Tom Wilkie
  • Review - Webinar: Writing Less YAML – Using jsonnet and kubecfg to Manage Kubernetes Resources

Dhall Configuration Language videos

No Dhall Configuration Language videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to Jsonnet and Dhall Configuration Language)
Configuration Management
38 38%
62% 62
Software Development
37 37%
63% 63
Developer Tools
34 34%
66% 66
Mobile Apps
100 100%
0% 0

User comments

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Social recommendations and mentions

Based on our record, Dhall Configuration Language should be more popular than Jsonnet. It has been mentiond 91 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.

Jsonnet mentions (37)

  • Levels of Configuration Languages
    Https://jsonnet.org/ I never heard of this before. This seems like the JSON I wish I really had. Of course at some point you could just use JavaScript. - Source: Hacker News / 2 months ago
  • Standard ML idiosyncrasies
    I've been reading the book Modern Compiler Implementation in ML lately. It's been helpful to brush up on some concepts while developing Tsonnet (my typed-aspiring Jsonnet flavor) and I hope to learn a ton more. However, I'm growing dissatisfied with some details -- not specifically the book, but the choice of the development environment. - Source: dev.to / 3 months ago
  • Tsonnet, a humble beginning
    For the past 2 years, I've been working extensively with Jsonnet, a configuration language that augments JSON and helps eliminate repetition in our config files. It has its limits (many by design), which keeps the language simple to use. But there's one thing that keeps nagging at me when I'm deep in the code: what's the shape of the input or output of this function? And wouldn't it be great if we could type... - Source: dev.to / 5 months ago
  • Refactor Terraform Resource Names By One Command
    Jsonnet: Use --jsonnet (-j) for advanced, programmatically controlled renaming logic. - Source: dev.to / 6 months ago
  • Kubernetes 101: Introduction
    Kubernetes does not provide or require a configuration language like Jsonnet, as it provides a declarative API that can be used with different types of declarative specifications. - Source: dev.to / 11 months ago
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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 / 2 months 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 / 3 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 / 5 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 / 7 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 / 8 months ago
View more

What are some alternatives?

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

Protobuf - Protocol buffers are a language-neutral, platform-neutral extensible mechanism for serializing structured data.

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

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

TOML - TOML - Tom's Obvious, Minimal Language

FRPC - Application and Data, Languages & Frameworks, and Remote Procedure Call (RPC)

Messagepack - An efficient binary serialization format.