From 5d44df3af65767e731c0dd239bd1d9664edbb361 Mon Sep 17 00:00:00 2001 From: Profpatsch Date: Fri, 29 Jan 2021 15:39:33 +0100 Subject: refactor(users/Profpatsch): move arglib_netencode into its own lib arglib is the simple idea of passing structured data via a conventional environment variable instead of implementing an optparser for every little tool. Pop the envvar, decode the contents, return the contents. Change-Id: Ie44148293a58aae9a0a613895176227d43b491bb Reviewed-on: https://cl.tvl.fyi/c/depot/+/2449 Tested-by: BuildkiteCI Reviewed-by: Profpatsch --- users/Profpatsch/arglib/default.nix | 40 +++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 users/Profpatsch/arglib/default.nix (limited to 'users/Profpatsch/arglib') diff --git a/users/Profpatsch/arglib/default.nix b/users/Profpatsch/arglib/default.nix new file mode 100644 index 000000000000..4f9f8e4cae79 --- /dev/null +++ b/users/Profpatsch/arglib/default.nix @@ -0,0 +1,40 @@ +{ depot, pkgs, lib, ... }: + +let + netencode = { + rust = depot.users.Profpatsch.writers.rustSimpleLib { + name = "arglib-netencode"; + dependencies = [ + depot.users.Profpatsch.netencode.netencode-rs + ]; + } '' + extern crate netencode; + + use netencode::{T}; + use std::os::unix::ffi::OsStrExt; + + pub fn arglib_netencode(env: Option<&std::ffi::OsStr>) -> Result { + let env = match env { + None => std::ffi::OsStr::from_bytes("ARGLIB_NETENCODE".as_bytes()), + Some(a) => a + }; + match std::env::var_os(env) { + None => Err(format!("could not read args, envvar {} not set", env.to_string_lossy())), + // TODO: good error handling for the different parser errors + Some(soup) => match netencode::parse::t_t(soup.as_bytes()) { + Ok((remainder, t)) => match remainder.is_empty() { + true => Ok(t), + false => Err(format!("there was some unparsed bytes remaining: {:?}", remainder)) + }, + Err(err) => Err(format!("parsing error: {:?}", err)) + } + } + } + ''; + }; + +in { + inherit + netencode + ; +} -- cgit 1.4.1