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feat(users/Profpatsch/netencode.rs): parse multiple stdin values

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Adds support for parsing multiple netencode values from stdin.

This is overly complicated for my tastes, but I don’t see a better way
of writing this logic that does not read all of stdin before starting
to parse the first value.

A kingdom for a conduit.

Change-Id: Ia4f849d4096c43e887756b756d2a85d7f9cd380a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6631
Autosubmit: Profpatsch <mail@profpatsch.de>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI
This commit is contained in:
Profpatsch 2022-09-18 12:37:30 +02:00 • committed by clbot
parent d44203d046
commit 0f74816d43
4 changed files with 104 additions and 31 deletions
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17
users/Profpatsch/netencode/default.nix
View file

@ -62,9 +62,8 @@ let
fn main() {
let (_, prog) = exec_helpers::args_for_exec("netencode-pretty", 0);
let mut buf = vec![];
let u = netencode::u_from_stdin_or_die_user_error("netencode-pretty", &mut buf);
match netencode_pretty::Pretty::from_u(u).print_multiline(&mut std::io::stdout()) {
let t = netencode::t_from_stdin_or_die_user_error("netencode-pretty");
match netencode_pretty::Pretty::from_u(t.to_u()).print_multiline(&mut std::io::stdout()) {
Ok(()) => {},
Err(err) => exec_helpers::die_temporary("netencode-pretty", format!("could not write to stdout: {}", err))
}
@ -89,24 +88,21 @@ let
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 = exec_helpers::args("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) {
let t = netencode::t_from_stdin_or_die_user_error("record-get");
match (dec::RecordDot {field, inner: dec::AnyU }).dec(t.to_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)
}
@ -126,10 +122,9 @@ let
use netencode::dec::{Record, Try, ScalarAsBytes, Decoder, DecodeError};
fn main() {
let mut buf = vec![];
let u = netencode::u_from_stdin_or_die_user_error("record-splice-env", &mut buf);
let t = netencode::t_from_stdin_or_die_user_error("record-splice-env");
let (_, prog) = exec_helpers::args_for_exec("record-splice-env", 0);
match Record(Try(ScalarAsBytes)).dec(u) {
match Record(Try(ScalarAsBytes)).dec(t.to_u()) {
Ok(map) => {
exec_helpers::exec_into_args(
"record-splice-env",