Ignore hidden files in GMA creation

fastgmad-lib/src/create/mod.rs

@@ -1,6 +1,6 @@
 use crate::{
 	error::{fastgmad_error, fastgmad_io_error, FastGmadError},
-	util::WriteEx,
+	util::{WriteEx, self},
 	whitelist,
 };
 use std::{
@@ -182,11 +182,16 @@ fn discover_entries(folder: &Path, ignore: &[String], warn_invalid: bool) -> Res
 				fastgmad_io_error!(while "walking directory", error: std::io::Error::new(std::io::ErrorKind::Other, "unknown"), path: path)
 			}
 		})?;
+
 		if !entry.file_type().is_file() {
 			continue;
 		}
 
 		let path = entry.path();
+		if matches!(util::is_hidden_file(path), Ok(true) | Err(_)) {
+			continue;
+		}
+
 		let relative_path = path
 			.strip_prefix(folder)
 			.map_err(|_| fastgmad_io_error!(error: std::io::Error::new(std::io::ErrorKind::InvalidData, "File not in addon directory"), path: path))?

fastgmad-lib/src/util.rs

@@ -1,4 +1,25 @@
-use std::io::{BufRead, Write};
+use std::{io::{BufRead, Write}, path::Path};
+
+pub fn is_hidden_file(path: &Path) -> Result<bool, std::io::Error> {
+	let hidden;
+
+	#[cfg(unix)] {
+		if let Some(file_name) = path.file_name() {
+			use std::os::unix::prelude::OsStrExt;
+			hidden = file_name.as_bytes().starts_with(b".");
+		} else {
+			hidden = false;
+		}
+	}
+
+	#[cfg(windows)] {
+		use std::os::windows::fs::MetadataExt;
+		const HIDDEN: u32 = 0x00000002;
+		hidden = std::fs::metadata(path)?.file_attributes() & HIDDEN != 0;
+	}
+
+	Ok(hidden)
+}
 
 pub trait WriteEx: Write {
 	fn write_nul_str(&mut self, bytes: &[u8]) -> Result<(), std::io::Error>;