tvl-depot/users/Profpatsch/execline/default.nix
Vincent Ambo aa122cbae7 style: format entire depot with nixpkgs-fmt
This CL can be used to compare the style of nixpkgs-fmt against other
formatters (nixpkgs, alejandra).

Change-Id: I87c6abff6bcb546b02ead15ad0405f81e01b6d9e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4397
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: wpcarro <wpcarro@gmail.com>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: cynthia <cynthia@tvl.fyi>
Reviewed-by: edef <edef@edef.eu>
Reviewed-by: eta <tvl@eta.st>
Reviewed-by: grfn <grfn@gws.fyi>
2022-01-31 16:11:53 +00:00

37 lines
909 B
Nix

{ depot, pkgs, lib, ... }:
let
exec-helpers = depot.nix.writers.rustSimpleLib
{
name = "exec-helpers";
}
(builtins.readFile ./exec_helpers.rs);
print-one-env = depot.nix.writers.rustSimple
{
name = "print-one-env";
dependencies = [
depot.users.Profpatsch.execline.exec-helpers
];
} ''
extern crate exec_helpers;
use std::os::unix::ffi::OsStrExt;
use std::io::Write;
fn main() {
let args = exec_helpers::args("print-one-env", 1);
let valname = std::ffi::OsStr::from_bytes(&args[0]);
match std::env::var_os(&valname) {
None => exec_helpers::die_user_error("print-one-env", format!("Env variable `{:?}` is not set", valname)),
Some(val) => std::io::stdout().write_all(&val.as_bytes()).unwrap()
}
}
'';
in
depot.nix.readTree.drvTargets {
inherit
exec-helpers
print-one-env
;
}