[Nix-dev] A few questions from a NixOS newbie.
Bjørn Forsman
bjorn.forsman at gmail.com
Mon Apr 21 16:25:51 CEST 2014
On 21 April 2014 15:35, Kirill Elagin <kirelagin at gmail.com> wrote:
> If there was a way to
>
> 1. run nix-repl non-interactively,
> 2. list variables in scope
>
> that would be a fine replacement for grepping and opening files…
>
> Something like `nix-repl ':l <nixpkgs>; :scope' | grep foo` and `nix-repl
> ':l <nixpkgs>; :p foo.meta`.
Running nix-repl non-interactively:
$ printf ":l <nixpkgs>\n:p wireshark.meta" | nix-repl
Welcome to Nix version 1.7. Type :? for help.
nix-repl> :l <nixpkgs>
Added 3747 variables.
nix-repl> :p wireshark.meta
{ description = "a powerful network protocol analyzer"; homepage =
"http://www.wireshark.org/"; license = { fullName = "GNU General
Public License version 2"; shortName = "GPLv2"; url =
"http://www.gnu.org/licenses/old-licenses/gpl-2.0.html"; };
longDescription = "Wireshark (formerly known as \"Ethereal\") is a
powerful network\nprotocol analyzer developed by an international team
of networking\nexperts. It runs on UNIX, OS X and Windows.\n";
maintainers = [ "Peter Simons <simons at cryp.to>" ]; platforms = [
"i686-linux" "x86_64-linux" "armv5tel-linux" "armv7l-linux"
"mips64el-linux" ]; position =
"/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/applications/networking/sniffers/wireshark/default.nix:47";
}
It's not as user friendly as e.g. "apt-get show wireshark" on Debian/Ubuntu :-)
Hm, I just tested the new --json option for nix-env. Look at this
(plesently surprised):
$ nix-env -qaP --json wireshark | json_pp
{
"nixos.pkgs.wireshark" : {
"system" : "x86_64-linux",
"name" : "wireshark-1.11.2",
"meta" : {
"longDescription" : "Wireshark (formerly known as
\"Ethereal\") is a powerful network\nprotocol analyzer developed by an
international team of networking\nexperts. It runs on UNIX, OS X and
Windows.\n",
"homepage" : "http://www.wireshark.org/",
"platforms" : [
"i686-linux",
"x86_64-linux",
"armv5tel-linux",
"armv7l-linux",
"mips64el-linux"
],
"maintainers" : [
"Peter Simons <simons at cryp.to>"
],
"position" :
"/nix/store/sv3pqp26qkiviq0rk2dgpaj6a1csaf3a-nixos-14.04pre42244.4160e65/nixos/nixpkgs/pkgs/applications/networking/sniffers/wireshark/default.nix:47",
"license" : {
"fullName" : "GNU General Public License version 2",
"url" : "http://www.gnu.org/licenses/old-licenses/gpl-2.0.html",
"shortName" : "GPLv2"
},
"description" : "a powerful network protocol analyzer"
}
}
}
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