48 lines
1.1 KiB
Rust
48 lines
1.1 KiB
Rust
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use std::path::PathBuf;
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use std::fmt::Debug;
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use clap::Parser;
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#[derive(Parser,Debug)]
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#[command(version)]
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pub struct Cli {
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/// The number of lines to skip
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lines: usize,
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/// The file to read, or stdin if not given
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file: Option<PathBuf>,
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/// Skip until N lines matching this
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#[arg(short,long, conflicts_with = "token")]
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line: Option<String>,
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/// Skip lines until N tokens found
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#[arg(short,long, conflicts_with = "line", required_if_eq("ignore_extras", "true"))]
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token: Option<String>,
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/// Only count the first token on each line
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#[arg(short, long="ignore-extras")]
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ignore_extras: bool,
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}
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pub fn skip<F>(cli: Cli, mut out: F) -> ()
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where F: FnMut(String) -> ()
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{
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out(String::from("line 2"));
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn skip_one_line() {
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//given
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let cli = Cli { lines: 1, file: Some(PathBuf::from("tests/two-lines.txt")), line: None, token: None, ignore_extras: false };
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let mut lines: Vec<String> = Vec::new();
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//when
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skip(cli, |line| lines.push(line));
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//then
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assert_eq!(lines, vec!["line 2"]);
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}
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}
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