R""(
Open the Nix expression of the GNU Hello package:
Get the filename and line number used by nix edit
:
This command opens the Nix expression of a derivation in an editor. The filename and line number of the derivation are taken from its meta.position
attribute. Nixpkgs' stdenv.mkDerivation
sets this attribute to the location of the definition of the meta.description
, version
or name
derivation attributes.
The editor to invoke is specified by the EDITOR
environment variable. It defaults to cat
. If the editor is emacs
, nano
, vim
or kak
, it is passed the line number of the derivation using the argument +<lineno>
.
)""