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use std::env;
use std::ffi::OsString;
use std::process;
use structopt::StructOpt;
#[derive(StructOpt, Debug)]
pub struct Cli {
#[structopt(short, long, default_value = "1")]
pub period: u64,
#[structopt(short = "c", long = "shell")]
pub shell: bool,
#[structopt(short = "z", long = "until-success")]
pub until_success: bool,
pub command: Vec<String>,
}
impl Cli {
pub fn from_args() -> Cli {
Cli::from_iter_safe(&mut env::args_os()).unwrap_or_else(|e| {
eprintln!("{}", e.message);
process::exit(1);
})
}
pub fn from_iter_safe<I>(iter: I) -> Result<Cli, clap::Error>
where
Self: Sized,
I: IntoIterator,
I::Item: Into<OsString> + Clone,
{
let clap = Cli::clap().get_matches_from_safe(iter)?;
let cli = Cli::from_clap(&clap);
if cli.command.is_empty() {
Err(clap::Error::with_description(
"No command specified
For more information try --help",
clap::ErrorKind::EmptyValue,
))
} else if cli.shell && cli.command.len() != 1 {
Err(clap::Error::with_description(
"In shell mode, command must be in a single argument
For more information try --help",
clap::ErrorKind::InvalidValue,
))
} else {
Ok(cli)
}
}
}
#[test]
fn empty() {
let cli = Cli::from_iter_safe(vec!["ogle"]);
assert!(cli.is_err());
}
#[test]
fn dashes() {
let cli = Cli::from_iter_safe(vec!["ogle", "--"]);
assert!(cli.is_err());
let cli = Cli::from_iter_safe(vec!["ogle", "--", "ls", "-l"]).unwrap();
assert_eq!(cli.command[0], "ls");
assert_eq!(cli.command[1], "-l");
assert_eq!(cli.command.len(), 2);
assert_eq!(cli.period, 1);
}
#[test]
fn period() {
let cli = Cli::from_iter_safe(vec!["ogle", "-p", "5", "--", "ls", "-l"]).unwrap();
assert_eq!(cli.period, 5);
let cli = Cli::from_iter_safe(vec!["ogle", "--period", "7", "--", "ls", "-l"]).unwrap();
assert_eq!(cli.period, 7);
}
#[test]
fn shell() {
let cli = Cli::from_iter_safe(vec!["ogle", "-c", "--", "ls", "-l"]);
assert!(cli.is_err());
let cli = Cli::from_iter_safe(vec!["ogle", "-c", "--", "ls -l"]).unwrap();
assert!(cli.shell);
assert_eq!(cli.command[0], "ls -l");
assert_eq!(cli.command.len(), 1);
}