Multiple boolean flags

[forest1102]

Hello, I am developing a new feature in diesel.
I want to use multiple flag like the following, but the following code causes a runtime error. How can I solve that?

use clap::ArgGroup;
use clap::ArgAction;
use clap::Arg;
use clap::Command;

fn main(){
    let m = Command::new("generate")
                .arg(
                    Arg::new("table-name")
                        .index(1)
                        .num_args(1..)
                        .action(clap::ArgAction::Append)
                        .help("Table names to filter."),
                )
                .arg(
                    Arg::new("only-tables")
                        .short('o')
                        .long("only-tables")
                        .action(ArgAction::SetTrue)
                        .help("Only include tables from table-name that matches regexp.")
                        ,
                )
                .arg(
                    Arg::new("except-tables")
                        .short('e')
                        .long("except-tables")
                        .action(ArgAction::SetTrue)
                        .help("Exclude tables from table-name that matches regex.")
                        ,
                )
                .arg(
                    Arg::new("print-schema-key")
                        .long("print-schema-key")
                        .action(clap::ArgAction::Append)
                        .help("select schema key from diesel.toml, use 'default' for print_schema without key."),
                )
            .group(ArgGroup::new("filter").args(["only-tables", "except-tables"]).multiple(true))

    .get_matches_from(vec![
        "generate",  "--print-schema-key", "user1", "table1", "-o", "--print-schema-key", "user2", "table2", "-o"
    ]);

dbg!(m.try_get_many::<bool>("only-tables").unwrap().map(|v| v.collect::<Vec<_>>()));
}

Playground

[epage]

What are you trying to accomplish with --only-tables?

For example:

• If you just want redundant uses, you can make it override itself.
• If you want to know how many are present, you want a Count action.

[forest1102]

I want to map parameters to hash map keyed by print-schema-key.
So, generate --print-schema-key user1 table1 -o --print-schema-key user2 table2 -o should map to:

{
  "user1": {
    "table_names": [
      "table1"
    ],
    "only_tables": true
  },
  "user2": {
    "table_names": [
      "table2"
    ],
    "only_tables": true
  }
}

That's why I need multiple flags.

[epage]

Ok, so you are looking to do something like #1704. #2222 might be a future way of making this simple.

https://docs.rs/clap/latest/clap/_derive/_cookbook/find/index.html is the closest example we have. It had some bugs but 4.4.14 fixed them. Be sure to depend on 4.4.14 and look at that version in the docs.

[forest1102]

Thanks a lot!