43 lines
1.5 KiB
Nix
43 lines
1.5 KiB
Nix
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{ depot, pkgs, lib, ... }:
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let
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netencode = {
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rust = depot.nix.writers.rustSimpleLib
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{
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name = "arglib-netencode";
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dependencies = [
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depot.users.Profpatsch.execline.exec-helpers
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depot.users.Profpatsch.netencode.netencode-rs
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];
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} ''
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extern crate netencode;
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extern crate exec_helpers;
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use netencode::{T};
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use std::os::unix::ffi::OsStrExt;
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pub fn arglib_netencode(prog_name: &str, env: Option<&std::ffi::OsStr>) -> T {
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let env = match env {
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None => std::ffi::OsStr::from_bytes("ARGLIB_NETENCODE".as_bytes()),
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Some(a) => a
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};
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let t = match std::env::var_os(env) {
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None => exec_helpers::die_user_error(prog_name, format!("could not read args, envvar {} not set", env.to_string_lossy())),
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// TODO: good error handling for the different parser errors
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Some(soup) => match netencode::parse::t_t(soup.as_bytes()) {
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Ok((remainder, t)) => match remainder.is_empty() {
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true => t,
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false => exec_helpers::die_environment_problem(prog_name, format!("arglib: there was some unparsed bytes remaining: {:?}", remainder))
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},
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Err(err) => exec_helpers::die_environment_problem(prog_name, format!("arglib parsing error: {:?}", err))
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}
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};
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std::env::remove_var(env);
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t
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}
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'';
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};
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in
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depot.nix.readTree.drvTargets netencode
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