This is a wrapper around `pkgs.runCommandWith`, which
- produces a fixed-output derivation, enabling the command(s) to access the network ;
- salts the derivation's name based on its inputs, ensuring the command is re-run whenever the inputs changes.
It accepts the following attributes:
- the derivation's `name` ;
- the `script` to be executed ;
-`stdenv`, the environment to use, defaulting to `stdenvNoCC` ;
- the derivation's output `hash`, defaulting to the empty file's.
The derivation's `outputHashMode` is set by default to recursive, so the `script` can output a directory as well.
All other attributes are passed through to [`mkDerivation`](#sec-using-stdenv),
including `nativeBuildInputs` to specify dependencies available to the `script`.
:::{.example #ex-tester-runCommand-nix}
# Run a command with network access
```nix
testers.runCommand{
name="access-the-internet";
command=''
curl -o /dev/null https://example.com
touch $out
'';
nativeBuildInputs=withpkgs;[cacertcurl];
}
```
:::
## `runNixOSTest` {#tester-runNixOSTest}
A helper function that behaves exactly like the NixOS `runTest`, except it also assigns this Nixpkgs package set as the `pkgs` of the test and makes the `nixpkgs.*` options read-only.