1ee872a769
this removes the hard-coded listing from the Haskell examples, which can later be replaced by a dynamic one as for the Python interpreters * fix broken reference * clarify why using `nix-env --query` makes sense Co-authored-by: wamirez <wamirez@protonmail.com>
98 lines
3.7 KiB
Markdown
98 lines
3.7 KiB
Markdown
# Languages and frameworks {#chap-language-support}
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The [standard build environment](#chap-stdenv) makes it easy to build typical Autotools-based packages with very little code. Any other kind of package can be accommodated by overriding the appropriate phases of `stdenv`. However, there are specialised functions in Nixpkgs to easily build packages for other programming languages, such as Perl or Haskell. These are described in this chapter.
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Each supported language or software ecosystem has its own package set named `<language or ecosystem>Packages`, which can be explored in various ways:
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- Search on [search.nixos.org](https://search.nixos.org/packages)
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For example, search for [`haskellPackages`](https://search.nixos.org/packages?query=haskellPackages) or [`rubyPackages`](https://search.nixos.org/packages?query=rubyPackages).
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- Navigate attribute sets with [`nix repl`](https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-repl).
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This technique is generally useful to inspect Nix language data structures.
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:::{.example #example-navigte-nix-repl}
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# Navigate Java compiler variants in `javaPackages` with `nix repl`
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```shell-session
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$ nix repl '<nixpkgs>' -I nixpkgs=channel:nixpkgs-unstable
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nix-repl> javaPackages.<tab>
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javaPackages.compiler javaPackages.openjfx15 javaPackages.openjfx21 javaPackages.recurseForDerivations
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javaPackages.jogl_2_4_0 javaPackages.openjfx17 javaPackages.openjfx22
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javaPackages.mavenfod javaPackages.openjfx19 javaPackages.override
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javaPackages.openjfx11 javaPackages.openjfx20 javaPackages.overrideDerivation
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```
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:::
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- List all derivations on the command line with [`nix-env --query`](https://nixos.org/manual/nix/stable/command-ref/nix-env/query).
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`nix-env` is the only convenient way to do that, as it will skip attributes that fail [assertions](https://nixos.org/manual/nix/stable/language/constructs#assertions), such as when a package is [marked as broken](#var-meta-broken), rather than failing the entire evaluation.
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:::{.example #example-list-haskellPackages}
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# List all Python packages in Nixpkgs
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The following command lists all [derivations names](https://nixos.org/manual/nix/stable/language/derivations#attr-name) with their attribute path from the latest Nixpkgs rolling release (`nixpkgs-unstable`).
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```shell-session
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$ nix-env -qaP -f '<nixpkgs>' -A pythonPackages -I nixpkgs=channel:nixpkgs-unstable
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```
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```console
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pythonPackages.avahi avahi-0.8
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pythonPackages.boost boost-1.81.0
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pythonPackages.caffe caffe-1.0
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pythonPackages.caffeWithCuda caffe-1.0
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pythonPackages.cbeams cbeams-1.0.3
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…
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```
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:::
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```{=include=} sections
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agda.section.md
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android.section.md
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beam.section.md
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bower.section.md
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chicken.section.md
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coq.section.md
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crystal.section.md
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cuda.section.md
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cuelang.section.md
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dart.section.md
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dhall.section.md
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dlang.section.md
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dotnet.section.md
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emscripten.section.md
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gnome.section.md
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go.section.md
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hare.section.md
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haskell.section.md
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hy.section.md
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idris.section.md
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idris2.section.md
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ios.section.md
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java.section.md
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javascript.section.md
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julia.section.md
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lisp.section.md
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lua.section.md
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maven.section.md
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nim.section.md
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ocaml.section.md
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octave.section.md
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perl.section.md
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php.section.md
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pkg-config.section.md
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python.section.md
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qt.section.md
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r.section.md
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ruby.section.md
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rust.section.md
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swift.section.md
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texlive.section.md
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titanium.section.md
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vim.section.md
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```
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