Question

我知道,我可以通过使用Nix-env来寻找Haskell包。

nix-env -f  <nixpkgs>  -qaP -A haskellPackages name_of_package

但这很缓慢,而且没有时间。如果我试图使用新的指挥系统<代码>nix 查询,则所有Haskell包裹都是隐蔽的。

$ nix search aeson
error: no results for the given search term(s)!

利用新的<代码>nix搜索指令,是否可以搜寻是否有kell包? 如果是,如何?

<><>Edit>: 我在thisirclog中找到了这方面的一些讨论,但我可以肯定这些建议在实践中的意义。具体来说,这一部分:

20:49 <duairc> How do I make nix search include haskellPackages?
20:52 <ottidmes> duairc: you might try and call recurseIntoAttrs on haskellPackages
20:52 <rain1> thanks
20:52 <LnL> rain1: nix-env -f  <nixpkgs>  -qaP -A haskellPackages
20:54 <gchristensen> duairc: ^
20:54 <duairc> LnL: Thanks!
20:55 <LnL> err, wrong person
20:56 <LnL> you can also add an overlay that recurses, but that might make it
      hard to find non haskell stuff if you re searching for something else
20:56 <ottidmes> I can confirm that
      haskellPackages = super.recurseIntoAttrs super.haskellPackages; works though
20:58 <duairc> ottidmes: What do I do with that expression? Put it in
      configuration.nix somewhere? If I type "nix search ghcid" then
      will it find it?
20:59 <duairc> Ah, you re using super, so I guess it s an overlay
20:59 <clever> duairc: for `nix search` to find it, the overlay must be
      somewhere in $HOME, i forget the exact path
20:59 <clever> duairc: configuration.nix only effects nixos-rebuild and
      nothing else
21:00 <ottidmes> duairc: yeah, it should be put in your overlay that is
      also used by nix-env the like, so not nixpkgs.overlays in your
      configuration.nix as mentioned by clever, and then searching
      for e.g. nix search nix-diff will result in:
      * nixpkgs.haskellPackages.nix-diff (nix-diff)

Answer 1

根据国际奥委会的聊天,建立了<代码>~/.config/nixpkgs/overlays.nix。载有此内容的文件:

[
  (self: super: {
    haskellPackages = super.recurseIntoAttrs super.haskellPackages;
  })
]

这是一种超额开支,规定了<代码>recurseForDerivations属地。一揽子计划是真实的。 • 显示扫描工具,以复制该套,在<代码>nix 查询时查询。它目前无证件,但已执行。

The Nix wiki describes where to put the overlay and the Nixpkgs manual describes what overlays actually are and how to use them.

Answer 2

你们可以节省这一成果:

nix-env -f  <nixpkgs>  -qaP -A haskellPackages

而是每次寻找产出?

I think the issue is <nixpkgs> will have to be evaluated at each invocation, however if this was a static file/path - it would not need to be.

Answer 3

查阅Gitewell NixOS/nixpkgs的最新数据:

nix search nixpkgs#haskellPackages PACKAGE_NAME

i.e.

nix search nixpkgs#haskellPackages aeson

产量

* legacyPackages.x86_64-linux.haskellPackages.AesonBson (0.4.1)
  Mapping between Aeson s JSON and Bson objects

* legacyPackages.x86_64-linux.haskellPackages.HsYAML-aeson (0.2.0.1)
  JSON to YAML Adapter

* legacyPackages.x86_64-linux.haskellPackages.Quickson (0.2)
  Quick JSON extractions with Aeson

* legacyPackages.x86_64-linux.haskellPackages.abeson (0.1.0.1)
  interconversion between aeson and bson

* legacyPackages.x86_64-linux.haskellPackages.activitystreams-aeson (0.2.0.2)
  An interface to the ActivityStreams specification

* legacyPackages.x86_64-linux.haskellPackages.aeson (2.1.2.1)
  Fast JSON parsing and encoding

.
.
.

另一实例

$ nix search nixpkgs#haskellPackages aeson_2  
       
* legacyPackages.x86_64-linux.haskellPackages.aeson_2_2_0_0 (2.2.0.0)
  Fast JSON parsing and encoding

如果您在<代码>nixpkgs上做了检查。当地:

nix search .#haskellPackages aeson

友情链接