06f4b75a18
Most tools end by execing into their argv, so here’s a small rust function which does the boilerplate. Change-Id: I9748955cf53828e02f04d7e8d74fbaf10c1158b5 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2453 Tested-by: BuildkiteCI Reviewed-by: Profpatsch <mail@profpatsch.de>
27 lines
848 B
Nix
27 lines
848 B
Nix
{ depot, pkgs, lib, ... }:
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let
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exec-helpers = depot.users.Profpatsch.writers.rustSimpleLib {
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name = "exec-helpers";
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} ''
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use std::os::unix::process::CommandExt;
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use std::ffi::OsStr;
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use std::os::unix::ffi::OsStrExt;
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pub fn exec_into_args<'a, I>(prog_name: &str, env_additions: I) -> !
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where
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I: IntoIterator<Item = (&'a [u8], &'a [u8])>,
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{
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let mut argv = std::env::args_os();
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let prog = argv.nth(1).expect(&format!("{}: first argument must be an executable", prog_name));
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let args = argv;
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let env = env_additions.into_iter().map(|(k,v)| (OsStr::from_bytes(k), OsStr::from_bytes(v)));
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let err = std::process::Command::new(prog).args(args).envs(env).exec();
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panic!("{}: exec failed: {:?}", prog_name, err);
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}
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'';
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in {
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inherit
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exec-helpers
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;
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}
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