use crate::linter::{Diagnostic, LintResult, Severity, Span};
use regex::Regex;
static LONE_REDIRECT: std::sync::LazyLock<Regex> =
std::sync::LazyLock::new(|| Regex::new(r"^\s*[<>]").unwrap());
pub fn check(source: &str) -> LintResult {
let mut result = LintResult::new();
for (line_num, line) in source.lines().enumerate() {
let line_num = line_num + 1;
if line.trim_start().starts_with('#') {
continue;
}
if LONE_REDIRECT.is_match(line) && !line.contains("<<") {
let diagnostic = Diagnostic::new(
"SC2188",
Severity::Error,
"Redirection without command".to_string(),
Span::new(line_num, 1, line_num, line.len() + 1),
);
result.add(diagnostic);
}
}
result
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_sc2188_lone_redirect() {
let code = "> output.txt";
let result = check(code);
assert_eq!(result.diagnostics.len(), 1);
}
#[test]
fn test_sc2188_normal_ok() {
let code = "echo test > output.txt";
let result = check(code);
assert_eq!(result.diagnostics.len(), 0);
}
}