basename/
basename.rs

1use jargon_args::Jargon;
2
3// Not required, but a helper struct to contain arguments and their data.
4struct Args {
5    multiple: bool,
6    suffix: Option<String>,
7    zero: bool,
8    names: Vec<String>,
9}
10
11fn main() {
12    let mut j: Jargon = Jargon::from_env(); // Get an instance of Jargon using `std::env::args()`
13
14    if j.contains(["-h", "--help"]) { // check for help argument
15        print!("{}", HELP);
16        return;
17    }
18
19    if j.contains(["-v", "--version"]) { // check for version argument
20        println!(
21            "basename example for Jargon crate {}",
22            env!("CARGO_PKG_VERSION")
23        );
24        return;
25    }
26
27    let args = Args { // fill helper struct
28        multiple: j.contains(["-a", "--multiple"]), // multiple
29        suffix: j.option_arg(["-s", "--suffix"]), // suffix to remove
30        zero: j.contains(["-z", "--zero"]), // terminate lines with null
31        names: j.finish(), // get names
32    };
33
34    if args.names.is_empty() { // check if there are names
35        println!("Missing NAMES");
36        return;
37    }
38
39    let mut v: Vec<String> = vec![print(&args, &args.names[0])]; // initiate vector of names
40
41    if args.multiple { // fill the rest if `-a` or `--multiple` was passed
42        args.names.iter().skip(1).for_each(|name| v.append(&mut vec![print(&args, name)]));
43    }
44
45    if args.zero { // terminate with null if `-z` or `--zero` was passed
46        v.iter().for_each(|name| print!("{}", name));
47    } else { // terminate each name with space or new line
48        v.iter().for_each(|name| println!("{} ", name));
49    }
50}
51
52// extract basename and remove suffix
53fn print(args: &Args, name: &String) -> String {
54    if let Some(name) = name.split('/').last() {
55        if let Some(suffix) = &args.suffix {
56            if name.ends_with(suffix) {
57                if let Some(n) = name.strip_suffix(suffix) {
58                    return n.to_string();
59                }
60            }
61        }
62        return name.to_string();
63    }
64    name.to_string()
65}
66
67const HELP: &str = "Usage: basename NAME [SUFFIX]
68  or:  basename OPTION... NAME...
69Print NAME with any leading directory components removed.
70If specified, also remove a trailing SUFFIX.
71
72  -a, --multiple       support multiple arguments and treat each as a NAME
73  -s, --suffix SUFFIX  remove a trailing SUFFIX; implies -a
74  -z, --zero           end each output line with NUL, not newline
75  -h, --help     display this help and exit
76  -v, --version  output version information and exit
77";
basename/basename.rs

basename/
basename.rs
