1 files changed, 43 insertions, 0 deletions
diff --git a/src/environment.rs b/src/environment.rs
new file mode 100644
index 0000000..3ecb790
--- /dev/null
+++ b/src/environment.rs
@@ -0,0 +1,43 @@
+use std::env;
+use std::path::PathBuf;
+
+pub const CONFIG_FILE_NAME: &str = "config.toml";
+
+pub fn config_dir() -> PathBuf {
+    portable_dir().unwrap_or_else(platform_specific_config_dir)
+}
+
+fn portable_dir() -> Option<PathBuf> {
+    let exe = env::current_exe().ok()?;
+    let dir = exe.parent()?;
+
+    dir.join(CONFIG_FILE_NAME)
+        .is_file()
+        .then(|| dir.to_path_buf())
+}
+
+fn platform_specific_config_dir() -> PathBuf {
+    #[cfg(target_os = "macos")]
+    {
+        xdg_config_dir().unwrap_or_else(|| {
+            dirs_next::config_dir()
+                .expect("expected valid config dir")
+                .join("iced-builder")
+        })
+    }
+    #[cfg(not(target_os = "macos"))]
+    {
+        dirs_next::config_dir()
+            .expect("expected valid config dir")
+            .join("iced-builder")
+    }
+}
+
+#[cfg(target_os = "macos")]
+fn xdg_config_dir() -> Option<PathBuf> {
+    let config_dir = xdg::BaseDirectories::with_prefix("iced-builder")
+        .ok()
+        .and_then(|xdg| xdg.find_config_file(CONFIG_FILE_NAME))?;
+
+    config_dir.parent().map(|p| p.to_path_buf())
+}