fix: ignore hidden named source operands

selfhost/cmd/ww/main.ww

@@ -8564,6 +8564,40 @@ fn basenameoff(p: *u8, plen: u64) u64 = {
 	return start;
 };
 
+// A named Go source still passes through matchFile's leading-dot/underscore
+// exclusion even when UseAllFiles bypasses platform suffixes and build tags.
+// Inspect the public operand spelling so a hidden parent is not source identity
+// and a hidden symlink spelling cannot be resurrected by a non-directory
+// target's name or file kind.
+fn sourceoperandignored(path: *u8) bool = {
+	if (!cstrendswithlit(path, ".ww")) { return false; };
+	let fi: os.filestat;
+	match (os.stat(&fi, pathstr(path))) {
+	case void => {
+		let typ: u32 = (fi.mode: u32) & 61440u32;
+		if (typ == os.mode.DIR: u32) { return false; };
+	};
+	case let e: os.oserror => return false;
+	};
+	let n: u64 = cstrlen(path);
+	let base: u64 = basenameoff(path, n);
+	return path[base] == '.' || path[base] == '_';
+};
+
+fn sourceoperandnosources(path: *u8) void = {
+	let n: u64 = cstrlen(path);
+	let base: u64 = basenameoff(path, n);
+	cerr("ww: ");
+	if (base == 0u64) {
+		cerr(".");
+	} else { if (base == 1u64) {
+		cerr("/");
+	} else {
+		os.write(os.STDERR_FILENO, path, base - 1u64);
+	}; };
+	cerr(": directory contains no WW package sources\n");
+};
+
 fn arenadupcstr(src: *u8, plen: u64) *u8 = {
 	let buf: []u8 = alloc([], plen + 1u64)!;
 	let i: u64 = 0u64;
@@ -8914,6 +8948,10 @@ fn dobuild(selfdir: *u8, argv: **u8, argc: i32, start: i32) i32 = {
 	case void => requestedliteral = true;
 	case let e: os.oserror => void;
 	};
+	if (sourceoperandignored(src)) {
+		sourceoperandnosources(src);
+		return 1;
+	};
 	let isdir: i32 = 0;
 	let resolved: *u8 = resolvemodule(selfdir, src, incs.ptr, &isdir);
 	if (resolved == nil) {
@@ -9792,6 +9830,26 @@ fn dotest(selfdir: *u8, argv: **u8, argc: i32, start: i32) i32 = {
 			producti += 1;
 		};
 	};
+	if (!strings.contains(pathstr(target), "...")
+		&& sourceoperandignored(target)) {
+		if (products.len != 0 && outstem != nil) {
+			cerr("ww test: package-test products reject -o\n");
+			return 2;
+		};
+		if (products.len != 0) {
+			cerr("ww test: package-test variant needs one directory\n");
+			return 2;
+		};
+		if (packageopts) {
+			cerr("ww test: package options need a directory\n");
+			return 2;
+		};
+		sourceoperandnosources(target);
+		if (targetindex >= 0 && compileonly == 0 && emitasm == 0) {
+			os.write(1, "FAIL\n".ptr, 5u64);
+		};
+		return 1;
+	};
 	if (patarg != nil) {
 		let first: os.filestat;
 		let firstregular: bool = false;