net-cli 0.20.1

Unified `net-mesh` command-line tool for the Net mesh
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49

//! Shared value parsers for clap-derived argv structs.
//!
//! Operator-facing flags reuse a small set of parse rules
//! (`0x`-prefixed hex for node / chain / daemon ids, decimal
//! fallback). Defining them once here keeps every subcommand's
//! `value_parser = ...` attribute consistent and avoids drift if
//! we later widen the accepted syntax (underscores, etc.).

/// Parse a `u64` from either decimal or a `0x`-prefixed hex
/// literal. Operators read node ids as hex from snapshot output;
/// rejecting `0xABCD` because clap's default parser only takes
/// decimal is a needless papercut.
pub(crate) fn parse_u64_flexible(s: &str) -> Result<u64, String> {
    let s = s.trim();
    if let Some(rest) = s.strip_prefix("0x").or_else(|| s.strip_prefix("0X")) {
        u64::from_str_radix(rest, 16).map_err(|e| format!("invalid hex: {e}"))
    } else {
        s.parse::<u64>()
            .map_err(|e| format!("invalid integer: {e}"))
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn decimal_round_trip() {
        assert_eq!(parse_u64_flexible("42").unwrap(), 42);
    }

    #[test]
    fn hex_lowercase_and_uppercase() {
        assert_eq!(parse_u64_flexible("0xabcd").unwrap(), 0xabcd);
        assert_eq!(parse_u64_flexible("0XABCD").unwrap(), 0xabcd);
    }

    #[test]
    fn whitespace_tolerant() {
        assert_eq!(parse_u64_flexible("  0x10  ").unwrap(), 0x10);
    }

    #[test]
    fn rejects_garbage() {
        assert!(parse_u64_flexible("").is_err());
        assert!(parse_u64_flexible("0xzz").is_err());
        assert!(parse_u64_flexible("abc").is_err());
    }
}