tricorder 0.6.0

Automation, the KISS way, no YAML involved.
Documentation 
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//! Upload a file to multiple remote hosts.
//!
//! Usage:
//!
//! ```shell
//! $ tricorder -i inventory upload LOCAL_PATH REMOTE_PATH [FILE_MODE]
//! $ tricorder -i inventory upload -T LOCAL_PATH REMOTE_PATH [FILE_MODE]
//! ```
//!
//! If not provided, `FILE_MODE` defaults to `0644`.
//!
//! The following options are available:
//!
//! | Flag | Description |
//! | --- | --- |
//! | `-T, --template` | If set, treats `LOCAL_PATH` as a template with the current host as input data. |

use crate::core::{Result, Error, Host};
use crate::tasks::{TaskRunner, upload};

use clap::ArgMatches;
use file_mode::Mode;
use std::convert::TryFrom;

pub fn run(hosts: Vec<Host>, matches: &ArgMatches) -> Result<()> {
  let local_path = get_path(matches.value_of("local_path"))?;
  let remote_path = get_path(matches.value_of("remote_path"))?;
  let file_mode = get_file_mode(matches.value_of("file_mode"))?;

  let task = if matches.is_present("template") {
    upload::Task::new_template(local_path, remote_path, file_mode)
  }
  else {
    upload::Task::new_file(local_path, remote_path, file_mode)
  };

  let res = hosts.run_task_seq(&task)?;
  println!("{}", res);

  Ok(())
}

fn get_path(arg: Option<&str>) -> Result<String> {
  if let Some(path) = arg {
    Ok(String::from(path))
  }
  else {
    Err(Box::new(Error::MissingInput(
      "No input file provided".to_string(),
    )))
  }
}

fn get_file_mode(arg: Option<&str>) -> Result<i32> {
  let mut mode = Mode::from(0o644);

  if let Some(mode_str) = arg {
    mode.set_str(mode_str)?;
  }

  let file_mode = i32::try_from(mode.mode())?;
  Ok(file_mode)
}