Added pathing utility and config handler

src/handlers/config.rs

@@ -0,0 +1,23 @@
+use anyhow::{bail, Error, Result};
+use serde::Deserialize;
+
+use crate::utils::pathing::config_path;
+
+#[derive(Deserialize)]
+pub struct CompleteConfig {}
+
+impl CompleteConfig {
+    pub fn new() -> Result<Self, Error> {
+        if let Ok(config_contents) = std::fs::read_to_string(config_path()) {
+            let config: CompleteConfig = toml::from_str(config_contents.as_str()).unwrap();
+
+            Ok(config)
+        } else {
+            bail!(
+                "Configuration not found. Create a config file at '{}', and see '{}' for an example configuration.",
+                config_path(),
+                format!("{}/blob/main/default-config.toml", env!("CARGO_PKG_REPOSITORY"))
+            )
+        }
+    }
+}

src/handlers/mod.rs

@@ -0,0 +1 @@
+pub mod config;

src/main.rs

@@ -1,3 +1,15 @@
+mod handlers;
+mod utils;
+
+use crate::handlers::config::CompleteConfig;
+
 fn main() {
-    println!("Hello World!");
+    match CompleteConfig::new() {
+        Ok(config) => {
+            println!("Hello World!");
+        }
+        Err(err) => {
+            println!("{}", err);
+        }
+    }
 }

src/utils/mod.rs

@@ -0,0 +1 @@
+pub mod pathing;

src/utils/pathing.rs

@@ -0,0 +1,46 @@
+use std::panic::panic_any;
+
+const BINARY_NAME: &str = env!("CARGO_BIN_NAME");
+
+pub fn config_path() -> String {
+    match std::env::consts::OS {
+        "linux" | "macos" => match std::env::var("HOME") {
+            Ok(env_home_path) => format!("{}/.config/{}/config.toml", env_home_path, BINARY_NAME),
+            Err(err) => panic_any(err),
+        },
+        "windows" => match std::env::var("APPDATA") {
+            Ok(appdata_path) => format!("{}\\{}\\config.toml", appdata_path, BINARY_NAME),
+            Err(err) => std::panic::panic_any(err),
+        },
+        _ => unimplemented!(),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    #[cfg(target_os = "windows")]
+    fn test_windows_config_path() {
+        match std::env::var("APPDATA") {
+            Ok(appdata_path) => assert_eq!(
+                config_path(),
+                format!("{}\\{}\\config.toml", appdata_path, BINARY_NAME)
+            ),
+            Err(err) => std::panic::panic_any(err),
+        }
+    }
+
+    #[test]
+    #[cfg(any(target_os = "macos", target_os = "linux"))]
+    fn test_unix_config_path() {
+        match std::env::var("HOME") {
+            Ok(env_home_path) => assert_eq!(
+                config_path(),
+                format!("{}/.config/{}/config.toml", env_home_path, BINARY_NAME)
+            ),
+            Err(err) => std::panic::panic_any(err),
+        }
+    }
+}