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feat(users/Profpatsch/netencode): add record-get

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Projecting into one record field of netencode given on stdin.

Change-Id: I975bd5558a06988aa159156ca73a449710db983f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2502
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
This commit is contained in:
Profpatsch 2021-02-09 20:56:56 +01:00
parent 7a4aca42ad
commit 1e5baa0dea
1 changed files with 30 additions and 0 deletions
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30
users/Profpatsch/netencode/default.nix
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@ -93,6 +93,35 @@ let
} (builtins.readFile ./netencode-mustache.rs);
record-get = imports.writers.rustSimple {
name = "record-get";
dependencies = [
netencode-rs
depot.users.Profpatsch.execline.exec-helpers
depot.users.Profpatsch.arglib.netencode.rust
];
} ''
extern crate netencode;
extern crate arglib_netencode;
extern crate exec_helpers;
use netencode::{encode, dec};
use netencode::dec::{Decoder, DecodeError};
fn main() {
let mut buf = vec![];
let (args, prog) = exec_helpers::args_for_exec("record-get", 1);
let field = match std::str::from_utf8(&args[0]) {
Ok(f) => f,
Err(_e) => exec_helpers::die_user_error("record-get", format!("The field name needs to be valid unicode"))
};
let u = netencode::u_from_stdin_or_die_user_error("record-get", &mut buf);
match (dec::RecordDot {field, inner: dec::AnyU }).dec(u) {
Ok(u) => encode(&mut std::io::stdout(), &u).expect("encoding to stdout failed"),
Err(DecodeError(err)) => exec_helpers::die_user_error("record-get", err)
}
}
'';
record-splice-env = imports.writers.rustSimple {
name = "record-splice-env";
dependencies = [
@ -122,6 +151,7 @@ in {
netencode-rs
netencode-rs-tests
netencode-mustache
record-get
record-splice-env
gen
;