What causes "download terminou mas nao achei o arquivo" in tonhowtf/omniget?

Always set opts.file_name explicitly so the code does not have to guess by mtime.

download terminou mas nao achei o arquivo

Error message

download terminou mas nao achei o arquivo

What it means

When opts.file_name is empty, download() infers the output file by listing dest_dir and picking the newest non-`.aria2` regular file by modification time. If the directory has no such file after aria2c exits successfully, it fails with this message — the post-download file discovery found nothing.

Solutions

Always set opts.file_name explicitly so the code does not have to guess by mtime.
Verify dest_dir is the exact same absolute directory aria2c writes to.
Check dest_dir contents for files stuck with a .aria2 control suffix (incomplete download).
Re-run and watch aria2c's stdout for the actual save path.

Example fix

// before
let path = if !opts.file_name.trim().is_empty() { ... } else { ...ok_or_else(...)? };
// after
let file_name = if opts.file_name.trim().is_empty() {
    // derive from URL as a fallback before scanning the dir
    url_file_name(&opts.url).ok_or_else(|| anyhow!("informe file_name: nao foi possivel deduzir o nome do arquivo"))?
} else { opts.file_name.trim().to_string() };
let path = PathBuf::from(&opts.dest_dir).join(file_name);

Defensive patterns

Strategy: validation

Validate before calling

// antes de chamar:
assert!(!opts.file_name.trim().is_empty(), "informe file_name explicitamente");
assert!(Path::new(&opts.dest_dir).is_dir(), "dest_dir nao existe");

Try / catch

match aria2::download(opts).await {
    Err(e) if e.to_string().contains("nao achei o arquivo") => {
        eprintln!("defina opts.file_name para nao depender da heuristica de mtime");
    }
    other => other?,
}

Prevention

Always populate opts.file_name — never rely on the newest-file heuristic.
Use absolute paths for dest_dir so aria2c and the scanner agree on the directory.
Ensure only one download runs per dest_dir to avoid mtime ambiguity.

When it happens

Trigger: aria2c exited 0 but wrote nothing into dest_dir (e.g. empty/redirect-only response), or dest_dir path differs from aria2c's actual save directory (relative vs absolute path, --dir mismatch), or all files still have .aria2 suffixes.

Common situations: URL that resolves to an empty 200 response; passing a dest_dir that doesn't match the cwd-dependent relative path aria2c used; concurrent downloads in the same dir cleaning files; aria2 saving under a different --dir option.

Understand the failure class

Background: "File not found" and ENOENT errors: why libraries can't find a file that should exist — this error's family across 50 libraries.

Related errors

AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/c691107380990182. Report an issue: GitHub.

Appendix: source

Thrown at src-tauri/omniget-core/src/core/tools/aria2.rs:139

            }
        }
        last
    });
    let st = child.wait().await?;
    let last = task.await.unwrap_or_default();
    if !st.success() {
        return Err(anyhow!("aria2c falhou: {}", last));
    }
    // aria2 decide o nome pelo Content-Disposition/URL; pega o arquivo mais novo da pasta
    let path = if !opts.file_name.trim().is_empty() {
        PathBuf::from(&opts.dest_dir).join(opts.file_name.trim())
    } else {
        std::fs::read_dir(&opts.dest_dir)?
            .flatten()
            .filter(|e| e.path().is_file() && !e.path().to_string_lossy().ends_with(".aria2"))
            .max_by_key(|e| e.metadata().and_then(|m| m.modified()).ok())
            .map(|e| e.path())
            .ok_or_else(|| anyhow!("download terminou mas nao achei o arquivo"))?
    };
    let bytes = std::fs::metadata(&path).map(|m| m.len()).unwrap_or(0);
    super::report(&progress, &id, "done", 100, Some(100), None);
    Ok(Aria2Result {
        path: path.to_string_lossy().to_string(),
        bytes,
    })
}

#[cfg(test)]
mod tests {
    #[test]
    fn parses_line() {
        let (p, s) =
            super::parse_progress("[#2089b0 12MiB/100MiB(12%) CN:16 DL:5.0MiB ETA:10s]").unwrap();
        assert_eq!(p, 12);
        assert_eq!(s, "5.0MiB");
    }

View on GitHub (pinned to 8600b91f42)