processor: implement CLI interface

This commit is contained in:
Bruno BELANYI 2022-08-23 16:50:23 +02:00
parent 211147db2c
commit 1b7471dfb8

View file

@ -1,3 +1,40 @@
fn main() { use thiserror::Error;
println!("Hello, world!");
use processor::{Ledger, Transaction};
/// Any kind of error in the pipeline CSV parsing -> payment processing -> final state output.
#[derive(Debug, Error)]
pub enum Error {
#[error("missing input file argument")]
MissingFile,
#[error("error during CSV processing: {0}")]
CsvError(#[from] csv::Error),
}
fn main() -> Result<(), Error> {
let mut ledger = Ledger::new();
let path = std::env::args_os()
// Skip argv[0]
.skip(1)
// Expect a file name here
.next()
.ok_or(Error::MissingFile)?;
for (tx, index) in Transaction::configured_csv_reader_builder()
.from_path(path)?
.into_deserialize()
.zip(1..)
{
match ledger.process(tx?) {
// All errors are logged but should not stop processing
Err(err) => eprintln!("error during processing: transaction {}: {}", index, err),
_ => {}
}
}
let mut writer = csv::Writer::from_writer(std::io::stdout());
ledger.dump_csv(&mut writer)?;
Ok(())
} }