dotty VS Metals

Compare dotty vs Metals and see what are their differences.

dotty

The Scala 3 compiler, also known as Dotty. (by lampepfl)

Metals

Scala language server with rich IDE features šŸš€ (by scalameta)
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dotty Metals
71 18
5,527 1,998
0.8% 1.5%
9.9 9.8
6 days ago 5 days ago
Scala Scala
Apache License 2.0 Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

dotty

Posts with mentions or reviews of dotty. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-09-13.
  • RustRover ā€“ A Standalone Rust IDE by JetBrains
    3 projects | news.ycombinator.com | 13 Sep 2023
    Dotty? Was it still the name later?

    http://dotty.epfl.ch/

  • Does the fthomas/refined library work differently in Scala 3?
    3 projects | /r/scala | 20 Jun 2023
    I think this might be related to this issue.
  • `boundary/break`: do you use it ? what do you do with it ?
    3 projects | /r/scala | 12 Jun 2023
    You can look (and EPFL collect feedback) about EPFL implementation of async/await: https://github.com/lampepfl/async. Also you can look at dotty ticket about this: https://github.com/lampepfl/dotty/pull/16739
  • Iron updates: turning opaque types into value objects
    2 projects | /r/scala | 6 Jun 2023
    The reason Iā€™m not currently an opaque type user as they do not play well with the tagless final style we use, though I am patiently awaiting some attention on my bug report: https://github.com/lampepfl/dotty/issues/17281
  • Reconnecting with Scala. What's new?
    7 projects | /r/scala | 24 May 2023
    Links: - https://dotty.epfl.ch/ - https://scala-native.org/en/stable/ - https://www.scala-js.org/ - https://typelevel.org/ - https://zio.dev/ - https://github.com/scala-native/scala-native/pull/3120 - https://github.com/lampepfl/dotty/pull/16517 - https://dotty.epfl.ch/docs/reference/experimental/index.html - https://scala-cli.virtuslab.org/ - https://scalameta.org/metals/ - https://docs.scala-lang.org/scala3/guides/migration/compatibility-intro.html - https://www.scala-lang.org/blog/2023/04/18/faster-scalajs-development-with-frontend-tooling.html - https://www.scala-lang.org/blog/2022/08/17/long-term-compatibility-plans.html
  • About Scala-Native
    4 projects | /r/scala | 13 Apr 2023
    Scala Native has much more control on how the Scala AST is compiled, and can easier workaround platform limitations, eg. lazy vals in Scala 3 required reflection config for Native Image (see this and that), while in Scala Native we could mitigate problems with unsupported usage inside in other ways within the compiler plugin.
  • What is scala's modern Web API framework?
    5 projects | /r/scala | 7 Mar 2023
    For example, this issue (https://github.com/lampepfl/dotty/issues/12840) was blocking the migration, it was reported more than a year ago and the fix was finally released a month ago (https://github.com/lampepfl/dotty/releases/tag/3.3.0-RC2).
  • scala 3 does not have :javap. Does anyone have any tips how to get around this.
    2 projects | /r/scala | 22 Feb 2023
    For the record, there is an implementation of :javap which is close to being done but might need a volunteer to get it over the finish line: https://github.com/lampepfl/dotty/pull/12210
  • Scala Resurrection
    6 projects | /r/scala | 24 Jan 2023
    Ahhh no unused warnings, thats disappointing to say the least. I guess some progress is being made here https://github.com/lampepfl/dotty/pull/16157 , tbh this kind of stuff makes me want to stick to Scala 2.
  • Scala DevInTraining looking to contribute to projects
    7 projects | /r/scala | 15 Jan 2023

Metals

Posts with mentions or reviews of Metals. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-24.
  • Reconnecting with Scala. What's new?
    7 projects | /r/scala | 24 May 2023
    Links: - https://dotty.epfl.ch/ - https://scala-native.org/en/stable/ - https://www.scala-js.org/ - https://typelevel.org/ - https://zio.dev/ - https://github.com/scala-native/scala-native/pull/3120 - https://github.com/lampepfl/dotty/pull/16517 - https://dotty.epfl.ch/docs/reference/experimental/index.html - https://scala-cli.virtuslab.org/ - https://scalameta.org/metals/ - https://docs.scala-lang.org/scala3/guides/migration/compatibility-intro.html - https://www.scala-lang.org/blog/2023/04/18/faster-scalajs-development-with-frontend-tooling.html - https://www.scala-lang.org/blog/2022/08/17/long-term-compatibility-plans.html
  • Tmux, NeoVim, etc. to write pure Kotlin code?
    2 projects | /r/Kotlin | 30 Apr 2023
    You might want to look at Scala, they have proper LSP support with metals which means you can write your code in vscode, neovim, emacs, or even fleet (the new jetbrains text editor).
  • New plugin to support LSP file operations
    6 projects | /r/neovim | 9 Jan 2023
    Please write in the comments if you know of any language servers I should test it with. Currently I tested only metals and rust-analyzer.
  • Why are all the guides on using LSP functionality full of bloat?
    3 projects | /r/neovim | 26 Dec 2022
    If you are using nvim-lspconfig you can pass the settings as a Lua table to the setup function. For example, here are may metals settings:
  • Type-Signature.com
    5 projects | news.ycombinator.com | 11 Nov 2022
  • What is the one thing you need everyday to make your job easier?
    2 projects | /r/AskMen | 16 Oct 2022
    Bazel support in Metals. I didn't spend all that time figuring out and adjusting Emacs/Spacemacs and making my workflow (almost) mouse-free just to scrap my config and switch to IDEA's rodent infested ways.
  • Scala 2.13.9 is here
    3 projects | /r/scala | 21 Sep 2022
    There is one small issue involving code completion returning inappropriate completions in some cases; https://github.com/scalameta/metals/pull/4414 will fix it, once it's included in a release. Perhaps that's the PR you saw?
  • Scala Isn't Fun Anymore
    9 projects | news.ycombinator.com | 13 Sep 2022
    It is, by quite a bit.

    While the "Scala IDE" project is dead for all practical purposes, IntelliJ IDEA's Scala plugin is actually pretty amazing. There's also a VisualStudio plugin that does pretty much the same and is advancing by leaps and bounds. There are also interconnecting projects that provide i.e. language server or build server that are reused by other projects. It's pretty modular. Metals (https://scalameta.org/metals/) is amazing.

    In general the language has become a wee bit faster to build, there was good progress with build times during the 2.12/2.13 cycles.

    With Scala3 the language got a bit simpler; concepts that were implemented explicitly using (hehe) implicits got their own keywords and a lot of the opinionated boilercode that cause a lot of debates is now generated during complication and hidden. A lot of "standardization" has occurred.

  • A Python-compatible statically typed language erg-lang/erg
    27 projects | news.ycombinator.com | 13 Aug 2022
  • What is your favorite programming language?
    9 projects | /r/archlinux | 20 Dec 2021
    Have a look at https://scalameta.org/metals/

What are some alternatives?

When comparing dotty and Metals you can also consider the following projects:

intellij-plugins - Open-source plugins included in the distribution of IntelliJ IDEA Ultimate and other IDEs based on the IntelliJ Platform

sbt - sbt, the interactive build tool

Scalatex - Programmable, Typesafe Document Generation

scalajs-benchmark - Benchmarks: write in Scala or JS, run in your browser. Live demo:

Jupyter Scala - A Scala kernel for Jupyter

Mill - Your shiny new Java/Scala build tool!

scalafmt - This repo is now a fork of --->

bloop - Bloop is a build server and CLI tool to compile, test and run Scala fast from any editor or build tool.

Scalastyle - scalastyle

intellij-scala-bundle - IntelliJ Scala Bundle - get started with Scala in a single click!