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use jargon_args::Jargon;
// Not required, but a helper struct to contain arguments and their data.
struct Args {
multiple: bool,
suffix: Option<String>,
zero: bool,
names: Vec<String>,
}
fn main() {
let mut j: Jargon = Jargon::from_env(); // Get an instance of Jargon using `std::env::args()`
if j.contains(["-h", "--help"]) { // check for help argument
print!("{}", HELP);
return;
}
if j.contains(["-v", "--version"]) { // check for version argument
println!(
"basename example for Jargon crate {}",
env!("CARGO_PKG_VERSION")
);
return;
}
let args = Args { // fill helper struct
multiple: j.contains(["-a", "--multiple"]), // multiple
suffix: j.option_arg(["-s", "--suffix"]), // suffix to remove
zero: j.contains(["-z", "--zero"]), // terminate lines with null
names: j.finish(), // get names
};
if args.names.is_empty() { // check if there are names
println!("Missing NAMES");
return;
}
let mut v: Vec<String> = vec![print(&args, &args.names[0])]; // initiate vector of names
if args.multiple { // fill the rest if `-a` or `--multiple` was passed
args.names.iter().skip(1).for_each(|name| v.append(&mut vec![print(&args, name)]));
}
if args.zero { // terminate with null if `-z` or `--zero` was passed
v.iter().for_each(|name| print!("{}", name));
} else { // terminate each name with space or new line
v.iter().for_each(|name| println!("{} ", name));
}
}
// extract basename and remove suffix
fn print(args: &Args, name: &String) -> String {
if let Some(name) = name.split('/').last() {
if let Some(suffix) = &args.suffix {
if name.ends_with(suffix) {
if let Some(n) = name.strip_suffix(suffix) {
return n.to_string();
}
}
}
return name.to_string();
}
name.to_string()
}
const HELP: &str = "Usage: basename NAME [SUFFIX]
or: basename OPTION... NAME...
Print NAME with any leading directory components removed.
If specified, also remove a trailing SUFFIX.
-a, --multiple support multiple arguments and treat each as a NAME
-s, --suffix SUFFIX remove a trailing SUFFIX; implies -a
-z, --zero end each output line with NUL, not newline
-h, --help display this help and exit
-v, --version output version information and exit
";
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