I am using clap v3.1.18 with following code.
#[derive(Parser, Debug)]
#[clap(author, version, about = ABOUT_TEXT, long_about = Some(ABOUT_TEXT))]
struct Args {
/// The root folder on local filesystem to scan
#[clap(short, long, default_value_t = utils::get_current_dir())]
folder: String,
/// Max number of recursive folders to scan
#[clap(short, long, default_value_t = 5)]
depth: u8,
/// Regular expression to include files. Only files whose name matches the specified regexp will be listed. E.g. to only list *.dll and *.exe files, you can specify `((\\.dll)$)|((\\.exe)$)`
#[clap(short, long, default_value(".+"))]
include: String,
/// Regular expression to include files. Regular expression to exclude files and directories. Files or directories whose name matches this regexp will be skipped
#[clap(short, long, default_value("(^~)|(^\\.)|((\\.tmp)$)|((\\.log)$)"))]
exclude: String,
/// Command line to start child process
#[clap(multiple_occurrences=true, use_delimiter=false)]
command: String,
}
let args = Args::parse();
The last command
, I want to get all the remaining part in the command line, including whitespaces. But current code does not work and it is terminated by the first whitespace.
I think I should set .setting(AppSettings::TrailingVarArg)
, but don't find a way to do that in Derive API. Please how can this be done?
Thanks @MeetTitan, here is my code finnally works
#[derive(Parser, Debug)]
#[clap(author, version, about = ABOUT_TEXT, long_about = Some(ABOUT_TEXT), trailing_var_arg=true)]
struct Args {
/// The root folder on local filesystem to scan
#[clap(short, long, default_value_t = utils::get_current_dir())]
folder: String,
/// Max number of recursive folders to scan
#[clap(short, long, default_value_t = 5)]
depth: u8,
/// Regular expression to include files. Only files whose name matches the specified regexp will be listed. E.g. to only list *.dll and *.exe files, you can specify `((\\.dll)$)|((\\.exe)$)`
#[clap(short, long, default_value(".+"))]
include: String,
/// Regular expression to include files. Regular expression to exclude files and directories. Files or directories whose name matches this regexp will be skipped
#[clap(short, long, default_value("(^~)|(^\\.)|((\\.tmp)$)|((\\.log)$)"))]
exclude: String,
/// Command line to start child process
#[clap(long, multiple_values=true, allow_hyphen_values=true)]
run: Vec<String>,
}
The derive reference states:
Any
Command
method can also be used as an attribute, see Terminology for syntax.
e.g.
#[clap(arg_required_else_help(true))]
would translate tocmd.arg_required_else_help(true)
Using this we can derive .setting(AppSettings::TrailingVarArg)
, (more accurately, App::trailing_var_arg()
) like so:
#[clap(... trailing_var_arg=true)]
struct Args { ... }