Hmbown/CodeWhale · error

Failed to run git diff. Is git installed? ({e})

Error message

Failed to run git diff. Is git installed? ({e})

What it means

Error "Failed to run git diff. Is git installed? ({e})" thrown in Hmbown/CodeWhale.

Source

Thrown at crates/tui/src/lib.rs:8275

}

fn collect_diff(args: &ReviewArgs) -> Result<String> {
    let mut cmd = crate::dependencies::Git::command()
        .ok_or_else(|| anyhow::anyhow!("git not found on PATH"))?;
    cmd.arg("diff");
    if args.staged {
        cmd.arg("--cached");
    }
    if let Some(base) = &args.base {
        cmd.arg(format!("{base}...HEAD"));
    }
    if let Some(path) = &args.path {
        cmd.arg("--").arg(path);
    }

    let output = cmd
        .output()
        .map_err(|e| anyhow::anyhow!("Failed to run git diff. Is git installed? ({e})"))?;
    if !output.status.success() {
        let stderr = String::from_utf8_lossy(&output.stderr);
        bail!("git diff failed: {}", stderr.trim());
    }
    let mut diff = String::from_utf8_lossy(&output.stdout).to_string();
    if diff.len() > args.max_chars {
        diff = crate::utils::truncate_with_ellipsis(&diff, args.max_chars, "\n...[truncated]\n");
    }
    Ok(diff)
}

fn review_target_label(args: &ReviewArgs) -> String {
    let mut label = if args.staged {
        "staged".to_string()
    } else if let Some(base) = args
        .base
        .as_deref()
        .map(str::trim)

View on GitHub (pinned to 8880682c63)

When it happens

Trigger: Thrown at crates/tui/src/lib.rs:8275 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Hmbown/CodeWhale@8880682c63 (2026-08-16). Data as JSON: /api/errors/3c49a4231cababaa. Report an issue: GitHub.