Add command line argument for specifying the root path

.run/Run.run.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Run" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="command" value="run --package bark --bin bark" />
+    <option name="command" value="run --package bark --bin bark -- /" />
     <option name="workingDirectory" value="file://$PROJECT_DIR$" />
     <option name="emulateTerminal" value="true" />
     <option name="channel" value="DEFAULT" />

src/file/mod.rs

@@ -66,12 +66,17 @@ impl FileEntry {
 
 impl From<&DirEntry> for FileEntry {
 	fn from(entry: &DirEntry) -> Self {
-		return Self::new(entry.path(), Some(entry.file_name()), entry.metadata().as_ref());
+		let path = entry.path();
+		let path = path.canonicalize().unwrap_or(path);
+		return Self::new(path, Some(entry.file_name()), entry.metadata().as_ref());
 	}
 }
 
 impl From<&Path> for FileEntry {
 	fn from(path: &Path) -> Self {
-		return Self::new(path.to_path_buf(), path.file_name().map(|n| n.to_os_string()), path.metadata().as_ref());
+		let path = path.canonicalize().unwrap_or_else(|_| path.to_path_buf());
+		let name = path.file_name().map(OsStr::to_os_string);
+		let metadata = path.metadata();
+		return Self::new(path, name, metadata.as_ref());
 	}
 }

src/main.rs

@@ -1,6 +1,8 @@
+use std::env;
 use std::error::Error;
 use std::io::{stdout, Write};
-use std::path::Path;
+use std::path::PathBuf;
+use std::process::ExitCode;
 
 use crossterm::{cursor, QueueableCommand, terminal};
 
@@ -13,7 +15,19 @@ mod file;
 mod gui;
 mod state;
 
-fn main() -> Result<(), Box<dyn Error>> {
+fn main() -> Result<ExitCode, Box<dyn Error>> {
+	let args = env::args_os().skip(1).collect::<Vec<_>>();
+	if args.len() > 1 {
+		println!("Too many arguments!");
+		return Ok(ExitCode::SUCCESS);
+	}
+	
+	let path = args.get(0).map(PathBuf::from).or_else(|| env::current_dir().ok());
+	if path.is_none() {
+		println!("Invalid path!");
+		return Ok(ExitCode::FAILURE);
+	}
+	
 	terminal::enable_raw_mode()?;
 	stdout().queue(terminal::EnterAlternateScreen)?;
 	stdout().queue(cursor::Hide)?;
@@ -22,7 +36,7 @@ fn main() -> Result<(), Box<dyn Error>> {
 	let mut view = View::stdout();
 	let actions = ActionMap::new();
 	
-	let mut state = State::with_root_path(Path::new("/"));
+	let mut state = State::with_root_path(&path.unwrap());
 	state.tree.expand(state.tree.root_id);
 	
 	'render: loop {
@@ -46,5 +60,5 @@ fn main() -> Result<(), Box<dyn Error>> {
 	stdout().flush()?;
 	terminal::disable_raw_mode()?;
 	
-	Ok(())
+	Ok(ExitCode::SUCCESS)
 }