diff options
Diffstat (limited to '')
-rw-r--r-- | users/Profpatsch/execline/default.nix | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/users/Profpatsch/execline/default.nix b/users/Profpatsch/execline/default.nix index 1f75b97591fc..c6a8d284a634 100644 --- a/users/Profpatsch/execline/default.nix +++ b/users/Profpatsch/execline/default.nix @@ -5,8 +5,29 @@ let 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 ; } |