feat: support environment variable in cd path (#241)

cspell.json

@@ -1 +1 @@
-{"version":"0.2","flagWords":[],"words":["Punct","KEYMAP","splitn","crossterm","YAZI","unar","peekable","ratatui","syntect","pbpaste","pbcopy","ffmpegthumbnailer","oneshot","Posix","Lsar","XADDOS","zoxide","cands","Deque","precache","imageops","IFBLK","IFCHR","IFDIR","IFIFO","IFLNK","IFMT","IFSOCK","IRGRP","IROTH","IRUSR","ISGID","ISUID","ISVTX","IWGRP","IWOTH","IWUSR","IXGRP","IXOTH","IXUSR","libc","winsize","TIOCGWINSZ","xpixel","ypixel","ioerr","appender","Catppuccin","macchiato","gitmodules","Dotfiles","bashprofile","vimrc","flac","webp","exiftool","mediainfo","ripgrep","nvim","indexmap","indexmap","unwatch","canonicalize","serde","fsevent","Ueberzug","iterm","wezterm","sixel","chafa","ueberzugpp","️ Überzug","️ Überzug","Konsole","Alacritty","Überzug","pkgs","paru","unarchiver","pdftoppm","poppler","prebuild","singlefile","jpegopt","EXIF","rustfmt","mktemp","nanos","xclip","xsel","Mintty","nixos","nixpkgs","SIGTSTP","SIGCONT","SIGCONT","backstack","natsort","natsort"],"language":"en"}
+{"flagWords":[],"words":["Punct","KEYMAP","splitn","crossterm","YAZI","unar","peekable","ratatui","syntect","pbpaste","pbcopy","ffmpegthumbnailer","oneshot","Posix","Lsar","XADDOS","zoxide","cands","Deque","precache","imageops","IFBLK","IFCHR","IFDIR","IFIFO","IFLNK","IFMT","IFSOCK","IRGRP","IROTH","IRUSR","ISGID","ISUID","ISVTX","IWGRP","IWOTH","IWUSR","IXGRP","IXOTH","IXUSR","libc","winsize","TIOCGWINSZ","xpixel","ypixel","ioerr","appender","Catppuccin","macchiato","gitmodules","Dotfiles","bashprofile","vimrc","flac","webp","exiftool","mediainfo","ripgrep","nvim","indexmap","indexmap","unwatch","canonicalize","serde","fsevent","Ueberzug","iterm","wezterm","sixel","chafa","ueberzugpp","️ Überzug","️ Überzug","Konsole","Alacritty","Überzug","pkgs","paru","unarchiver","pdftoppm","poppler","prebuild","singlefile","jpegopt","EXIF","rustfmt","mktemp","nanos","xclip","xsel","Mintty","nixos","nixpkgs","SIGTSTP","SIGCONT","SIGCONT","backstack","natsort","natsort","USERPROFILE"],"language":"en","version":"0.2"}

shared/Cargo.toml

@@ -10,4 +10,5 @@ futures     = "^0"
 libc        = "^0"
 parking_lot = "^0"
 ratatui    	= { version = "^0" }
+regex       = "^1"
 tokio       = { version = "^1", features = [ "parking_lot", "macros", "rt-multi-thread", "sync", "time", "fs" ] }

shared/src/fns.rs

@@ -5,12 +5,32 @@ use tokio::fs;
 use crate::Url;
 
 pub fn expand_path(p: impl AsRef<Path>) -> PathBuf {
-	let p = p.as_ref();
+	// ${HOME} or $HOME
+	#[cfg(unix)]
+	let re = regex::Regex::new(r"\$(?:\{([^}]+)\}|([a-zA-Z\d_]+))").unwrap();
+
+	// %USERPROFILE%
+	#[cfg(windows)]
+	let re = regex::Regex::new(r"%([^%]+)%").unwrap();
+
+	let s = p.as_ref().to_string_lossy();
+	let s = re.replace_all(&s, |caps: &regex::Captures| {
+		let name = caps.get(2).or_else(|| caps.get(1)).unwrap();
+		env::var(name.as_str()).unwrap_or_else(|_| caps.get(0).unwrap().as_str().to_owned())
+	});
+
+	let p = Path::new(s.as_ref());
 	if let Ok(p) = p.strip_prefix("~") {
+		#[cfg(unix)]
 		if let Some(home) = env::var_os("HOME") {
-			return PathBuf::from_iter([&home, p.as_os_str()]);
+			return Path::new(&home).join(p);
+		}
+		#[cfg(windows)]
+		if let Some(home) = env::var_os("USERPROFILE") {
+			return Path::new(&home).join(p);
 		}
 	}
+
 	if p.is_absolute() {
 		return p.to_path_buf();
 	}
@@ -48,7 +68,7 @@ pub fn short_path<'a>(p: &'a Path, base: &Path) -> ShortPath<'a> {
 }
 
 pub fn readable_path(p: &Path) -> String {
-	if let Ok(home) = env::var("HOME") {
+	if let Some(home) = env::var_os("HOME") {
 		if let Ok(p) = p.strip_prefix(home) {
 			return format!("~/{}", p.display());
 		}