runtasktic 1.2.0

Command-line task management tool for execution of regular long sequential or parallel tasks.
Documentation 
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use crate::config::Print;
use chrono::Local;
use std::fs::OpenOptions;
use std::io::Write;

pub fn notification_print(print: &Print, message: &str) -> Result<(), String> {
  writeln(
    &print.output,
    format!(
      "{} INFO [notification::print] {}",
      Local::now().format("%Y-%m-%d %H:%M:%S,%3f"),
      message
    ),
  )
  .map_err(|msg| format!("Can't open output file {}: {}", print.output, msg))?;
  Ok(())
}

fn writeln(output: &String, message: String) -> std::io::Result<()> {
  match output.as_ref() {
    "stdout" => writeln!(std::io::stdout(), "{}", message),
    "stderr" => writeln!(std::io::stderr(), "{}", message),
    "none" | "/dev/null" => Ok(()),
    _ => {
      let file = OpenOptions::new().create(true).append(true).open(output)?;
      writeln!(&file, "{}", message)
    }
  }
}