rustploy-gui 0.1.7

Rustploy — desktop client (glacier-ui) for the Rustploy PaaS daemon
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//! Runtime asset location.

use std::path::{Path, PathBuf};

/// A file that must exist under any valid asset base — used as the probe.
const MARKER: &str = "views/app.gvb";

/// System-wide install prefix used by the Debian package (see the `deb`
/// metadata in `Cargo.toml`).
const SYSTEM_PREFIX: &str = "/usr/share/rustploy";

/// Finds the asset base directory and `chdir`s into it so all the
/// CWD-relative asset paths resolve.
pub fn locate_and_chdir() {
    if let Some(base) = find_base()
        && let Err(e) = std::env::set_current_dir(&base)
    {
        eprintln!("assets: falha ao entrar em {}: {e}", base.display());
    }
}

fn find_base() -> Option<PathBuf> {
    if let Ok(dir) = std::env::var("RUSTPLOY_UI_ASSETS") {
        let p = PathBuf::from(dir);
        if has_marker(&p) {
            return Some(p);
        }
    }

    if let Ok(exe) = std::env::current_exe()
        && let Some(dir) = exe.parent()
        && has_marker(dir)
    {
        return Some(dir.to_path_buf());
    }

    if let Ok(cwd) = std::env::current_dir()
        && has_marker(&cwd)
    {
        return None;
    }

    let system = PathBuf::from(SYSTEM_PREFIX);
    if has_marker(&system) {
        return Some(system);
    }

    None
}

fn has_marker(base: &Path) -> bool {
    base.join(MARKER).is_file()
}