Parse git version

src/utils/git.rs

@@ -0,0 +1,32 @@
+use std::process::Command;
+
+pub fn retrieve_git_version() -> Option<(usize, usize)> {
+    if let Ok(git_path) = grep_cli::resolve_binary("git") {
+        let cmd = Command::new(git_path).arg("--version").output().ok()?;
+        parse_git_version(&cmd.stdout)
+    } else {
+        None
+    }
+}
+
+fn parse_git_version(output: &[u8]) -> Option<(usize, usize)> {
+    let mut parts = output.strip_prefix(b"git version ")?.split(|&b| b == b'.');
+    let major = std::str::from_utf8(parts.next()?).ok()?.parse().ok()?;
+    let minor = std::str::from_utf8(parts.next()?).ok()?.parse().ok()?;
+    Some((major, minor))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::parse_git_version;
+    use rstest::rstest;
+
+    #[rstest]
+    #[case(b"git version 2.46.0", Some((2, 46)))]
+    #[case(b"git version 2.46.0
+", Some((2, 46)))]
+    #[case(b"", None)]
+    fn test_parse_git_version(#[case] input: &[u8], #[case] expected: Option<(usize, usize)>) {
+        assert_eq!(parse_git_version(input), expected);
+    }
+}

src/utils/mod.rs

@@ -1,5 +1,6 @@
 #[cfg(not(tarpaulin_include))]
 pub mod bat;
+pub mod git;
 pub mod helpwrap;
 pub mod path;
 pub mod process;