Last argument needs to be quoted

[marceloboeira]

Rust Version

rustc 1.27.0 (3eda71b00 2018-06-19)

Affected Version of clap

"checksum clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"

Expected Behavior Summary

My command line tool is supposed to work like this
foo -u <user> <command>
e.g.:
foo -u jack echo s
foo -u paul ls -al

So, I need to get options such as user, but the <command> itself, I need to be the rest of the args.

Actual Behavior Summary

The code below, results on a behavior where I can't get the value of <command> unless is quoted:

foo -u jack echo s -> error: Found argument 's' which wasn't expected, or isn't valid in this context

whereas:
foo -u jack 'echo s' works fine.

Is there anyway of avoiding the quotes?

Sample Code or Link to Sample Code

    let matches = App::new("foo")
                          .version("0.1")
                          .arg(Arg::with_name("user")
                               .short("u")
                               .long("user")
                               .required(true)
                               .takes_value(true))
                          .arg(Arg::with_name("command")
                               .help("The command to run")
                               .required(true)
                               .takes_value(true)).get_matches();

[marceloboeira]

Any updates? Is the project still maintained?

[marceloboeira]

If it's of anyones interest:

By default, clap will only parse any argument once. This means that in -u jack echo s, it will parse -u jack as the "user" option, echo as the "command" argument, and have an argument s that it doesn't know what to do with (hence it "wasn't expected").

I'm assuming you want all of the non-option arguments instead of just one, in which case setting .multiple(true) on your non-option argument ("command") is what you want. In that case, it will parse all remaining, non-option arguments as "command", and give you a list back with each of the arguments (which you can deal with as you please):

let matches = App::new("foo")
    .version("0.1")
    .arg(
        Arg::with_name("user")
            .short("u")
            .long("user")
            .required(true)
            .takes_value(true),
    )
    .arg(
        Arg::with_name("command")
            .help("The command to run")
            .required(true)
            .takes_value(true)
            .multiple(true),
    )
    // parse as if program ran as:   foo -u jack echo s
    .get_matches_from(&["foo", "-u", "jack", "echo", "s"]);

// get command arguments
let command: Vec<&str> = matches.values_of("command").unwrap().collect();
println!("{:?}", command); // ["echo", "s"]

More info: https://stackoverflow.com/questions/55345730/how-can-i-prevent-the-last-argument-from-needing-to-be-quoted-with-clap/55345899#55345899