Utility functions for working with data from Nix in Python

Related tags

Miscellaneouspynixutil
Overview

Pynixutil - Utility functions for working with data from Nix in Python

Examples

Base32 encoding/decoding

import pynixutil

input = "v5sv61sszx301i0x6xysaqzla09nksnd"
b = pynixutil.b32decode(input)
output = pynixutil.b32encode(b)
assert input == output

Derivation parsing

import pynixutil

# Returns a dict with the same shape as nix show-derivation uses
d = pynixutil.drvparse(open("/nix/store/33cbakl9bg880apzjyvwwgkwsn8zzpcb-hello-2.10.drv").read())
print(d)

Returns a structure like

Derivation(
  outputs={
    "out": DerivationOutput(
      path="/nix/store/9rg06p1rcpw3y9m1xpji39w43zj0sny6-hello-2.10",
      hash_algo=None,
      hash=None
    )
  },
  input_drvs={
    "/nix/store/0bwic13piazaq033zz893fhd40pb6sj7-stdenv-linux.drv": [
      "out"
    ],
    "/nix/store/b7xrdpwx9jljhw32knn844xyvcmfkbfk-bash-4.4-p23.drv": [
      "out"
    ],
    "/nix/store/vsf383dfgky6bplikvbvixyshkdzd9hz-hello-2.10.tar.gz.drv": [
      "out"
    ]
  },
  input_srcs=[
    "/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh"
  ],
  system="x86_64-linux",
  builder="/nix/store/x0dcb2rxlzf32g0ddfkqqz1sfcyx4yay-bash-4.4-p23/bin/bash",
  args=[
    "-e",
    "/nix/store/9krlzvny65gdc8s7kpb6lkx8cd02c25b-default-builder.sh"
  ],
  env={
    "buildInputs": "",
    "builder": "/nix/store/x0dcb2rxlzf32g0ddfkqqz1sfcyx4yay-bash-4.4-p23/bin/bash",
    "configureFlags": "",
    "depsBuildBuild": "",
    "depsBuildBuildPropagated": "",
    "depsBuildTarget": "",
    "depsBuildTargetPropagated": "",
    "depsHostHost": "",
    "depsHostHostPropagated": "",
    "depsTargetTarget": "",
    "depsTargetTargetPropagated": "",
    "doCheck": "1",
    "doInstallCheck": "",
    "name": "hello-2.10",
    "nativeBuildInputs": "",
    "out": "/nix/store/9rg06p1rcpw3y9m1xpji39w43zj0sny6-hello-2.10",
    "outputs": "out",
    "patches": "",
    "pname": "hello",
    "propagatedBuildInputs": "",
    "propagatedNativeBuildInputs": "",
    "src": "/nix/store/3x7dwzq014bblazs7kq20p9hyzz0qh8g-hello-2.10.tar.gz",
    "stdenv": "/nix/store/qdf49mvm79r83n9c9s7pkmmjqwhrw8jv-stdenv-linux",
    "strictDeps": "",
    "system": "x86_64-linux",
    "version": "2.10"
  }
)

This mostly matches the data returned by nix show-derivation, but with more pythonic attribute names.

Owner
Tweag
Software Innovation Lab
Tweag
GitHub Repository
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