Add utils crates

src/platform/paths.rs

@@ -0,0 +1,50 @@
+// Copyright (c) Tribufu. All Rights Reserved.
+// SPDX-License-Identifier: MIT
+
+use std::env;
+use std::path::PathBuf;
+use tribufu_error::Result;
+
+/// Gets the root base directory of the application.
+pub fn app_dir() -> Result<PathBuf> {
+    let mut path = dunce::canonicalize(env::current_exe()?)?; // /bin/platform/app.exe
+    path.pop(); // /bin
+    path.pop(); // /
+    Ok(path)
+}
+
+/// Gets the path to the platform-specific binary directory.
+pub fn bin_dir() -> Result<PathBuf> {
+    let base_dir = app_dir()?;
+
+    #[cfg(all(target_os = "macos", not(debug_assertions)))]
+    return Ok(base_dir.join("MacOS"));
+
+    #[cfg(not(all(target_os = "macos", not(debug_assertions))))]
+    Ok(base_dir.join("bin"))
+}
+
+/// Gets the path to the configuration directory.
+pub fn config_dir() -> Result<PathBuf> {
+    Ok(app_dir()?.join("config"))
+}
+
+/// Gets the path to the assets directory.
+pub fn assets_dir() -> Result<PathBuf> {
+    Ok(app_dir()?.join("assets"))
+}
+
+/// Gets the path to the saved data directory.
+pub fn saved_dir() -> Result<PathBuf> {
+    Ok(app_dir()?.join("saved"))
+}
+
+/// Gets the path to the cache directory inside `saved`.
+pub fn cache_dir() -> Result<PathBuf> {
+    Ok(saved_dir()?.join("cache"))
+}
+
+/// Gets the path to the logs directory inside `saved`.
+pub fn logs_dir() -> Result<PathBuf> {
+    Ok(saved_dir()?.join("logs"))
+}