What causes "Could not find system data directory" in Zackriya-Solutions/meetily?

Always pass an explicit models directory via new_with_models_dir in production code paths

Could not find system data directory

Error message

Could not find system data directory

What it means

Production fallback when no models directory is provided: both dirs::data_dir() (XDG_DATA_HOME / APPDATA / ~/Library/Application Support) and dirs::home_dir() returned None, so there is nowhere to place models. The process environment lacks the platform's standard user/home variables.

Source

Thrown at frontend/src-tauri/src/summary/summary_engine/model_manager.rs:147

    /// Create a new model manager with custom models directory
    pub fn new_with_models_dir(models_dir: Option<PathBuf>) -> Result<Self> {
        let models_dir = if let Some(dir) = models_dir {
            dir
        } else {
            // Fallback: Use current directory in development
            let current_dir = std::env::current_dir()
                .map_err(|e| anyhow!("Failed to get current directory: {}", e))?;

            if cfg!(debug_assertions) {
                // Development mode
                current_dir.join("models").join("summary")
            } else {
                // Production mode fallback (caller should provide path)
                log::warn!("ModelManager: No models directory provided, using fallback path");
                dirs::data_dir()
                    .or_else(|| dirs::home_dir())
                    .ok_or_else(|| anyhow!("Could not find system data directory"))?
                    .join("Meetily")
                    .join("models")
                    .join("summary")
            }
        };

        log::info!(
            "Built-in AI ModelManager using directory: {}",
            models_dir.display()
        );

        Ok(Self {
            models_dir,
            available_models: Arc::new(RwLock::new(HashMap::new())),
            active_downloads: Arc::new(RwLock::new(HashSet::new())),
            cancel_download_flag: Arc::new(RwLock::new(None)),
        })
    }

View on GitHub (pinned to 0281737d87)

Solutions

Always pass an explicit models directory via new_with_models_dir in production code paths
Set the missing variable for service contexts (HOME on Unix, APPDATA on Windows)
In containers, set HOME=/data or XDG_DATA_HOME=/data
Fail fast at app startup with a clear message instead of constructing the manager lazily

Defensive patterns

Strategy: validation

Validate before calling

// Fail fast with a clear message when the environment is incomplete
let base = dirs::data_dir()
    .or_else(dirs::home_dir)
    .ok_or_else(|| anyhow!("No user data dir: set HOME (Unix) or APPDATA (Windows)"))?;
let models_dir = base.join("Meetily").join("models").join("summary");

Prevention

Pass an explicit models directory from the Tauri app path resolver instead of relying on env fallbacks
For services/containers, always set HOME or XDG_DATA_HOME / APPDATA
Validate the environment at startup rather than deep inside model construction

When it happens

Trigger: Running the binary as a systemd/Windows service without HOME or APPDATA set; minimal containers that drop environment variables; CI or test harnesses invoking the manager directly with a cleared environment.

Common situations: Windows service context missing %APPDATA%; Docker containers without HOME; test runners that scrub env.

Related errors

AI-assisted analysis of Zackriya-Solutions/meetily@0281737d87 (2026-08-16). Data as JSON: /api/errors/db81be1b022fcbc2. Report an issue: GitHub.