Allow for either .odin file or directory as the initial start

src/checker.cpp

@@ -2532,7 +2532,7 @@ void check_add_import_decl(Checker *c, AstNodeImportDecl *id) {
 	GB_ASSERT(scope->is_package && scope->package != nullptr);
 
 	if (scope->is_global) {
-		error(token, "Importing a runtime package is disallowed and unnecessary");
+		error(token, "Importing a built-in package is disallowed and unnecessary");
 		return;
 	}
 
@@ -2567,7 +2567,7 @@ void check_add_import_decl(Checker *c, AstNodeImportDecl *id) {
 
 	if (id->is_using) {
 		if (parent_scope->is_global) {
-			error(id->import_name, "'runtime' package imports cannot use using");
+			error(id->import_name, "'builtin' package imports cannot use using");
 			return;
 		}
 

src/parser.cpp

@@ -374,6 +374,9 @@ void error(AstNode *node, char *fmt, ...) {
 	va_start(va, fmt);
 	error_va(token, fmt, va);
 	va_end(va);
+	if (node != nullptr && node->file != nullptr) {
+		node->file->error_count += 1;
+	}
 }
 
 void error_no_newline(AstNode *node, char *fmt, ...) {
@@ -385,6 +388,9 @@ void error_no_newline(AstNode *node, char *fmt, ...) {
 	va_start(va, fmt);
 	error_no_newline_va(token, fmt, va);
 	va_end(va);
+	if (node != nullptr && node->file != nullptr) {
+		node->file->error_count += 1;
+	}
 }
 
 void warning(AstNode *node, char *fmt, ...) {
@@ -399,6 +405,9 @@ void syntax_error(AstNode *node, char *fmt, ...) {
 	va_start(va, fmt);
 	syntax_error_va(ast_node_token(node), fmt, va);
 	va_end(va);
+	if (node != nullptr && node->file != nullptr) {
+		node->file->error_count += 1;
+	}
 }
 
 
@@ -1227,6 +1236,7 @@ void fix_advance_to_next_stmt(AstFile *f) {
 			return;
 
 
+		case Token_package:
 		case Token_foreign:
 		case Token_import:
 		case Token_export:
@@ -4144,7 +4154,6 @@ void parse_file(Parser *p, AstFile *f) {
 
 	comsume_comment_groups(f, f->prev_token);
 
-
 	f->package_token = expect_token(f, Token_package);
 	Token package_name = expect_token_after(f, Token_Ident, "package");
 	if (package_name.kind == Token_Ident) {
@@ -4156,6 +4165,10 @@ void parse_file(Parser *p, AstFile *f) {
 	}
 	f->package_name = package_name.string;
 
+	if (f->error_count > 0) {
+		return;
+	}
+
 	f->decls = parse_stmt_list(f);
 	parse_setup_file_decls(p, f, base_dir, f->decls);
 }
@@ -4218,7 +4231,6 @@ skip:
 	parse_file(p, file);
 
 	gb_mutex_lock(&p->file_add_mutex);
-	// file->id = imported_package.index;
 	HashKey key = hash_string(fi->fullpath);
 	map_set(&package->files, key, file);
 
@@ -4332,6 +4344,14 @@ ParseFileError parse_packages(Parser *p, String init_filename) {
 
 	char *fullpath_str = gb_path_get_full_name(heap_allocator(), cast(char *)&init_filename[0]);
 	String init_fullpath = string_trim_whitespace(make_string_c(fullpath_str));
+	if (!path_is_directory(init_fullpath)) {
+		String const ext = str_lit(".odin");
+		if (!string_ends_with(init_fullpath, ext)) {
+			gb_printf_err("Expected either a directory or a .odin file, got '%.*s'\n", LIT(init_filename));
+			return ParseFile_WrongExtension;
+		}
+		init_fullpath = directory_from_path(init_fullpath);
+	}
 
 	TokenPos init_pos = {};
 	ImportedPackage init_imported_package = {ImportedPackage_Init, init_fullpath, init_fullpath, init_pos};
@@ -4347,7 +4367,7 @@ ParseFileError parse_packages(Parser *p, String init_filename) {
 	p->init_fullpath = init_fullpath;
 
 	// IMPORTANT TODO(bill): Figure out why this doesn't work on *nix sometimes
-#if 0 && defined(GB_SYSTEM_WINDOWS)
+#if defined(GB_SYSTEM_WINDOWS)
 	isize thread_count = gb_max(build_context.thread_count, 1);
 	if (thread_count > 1) {
 		isize volatile curr_import_index = 0;

src/parser.hpp

@@ -70,7 +70,7 @@ struct AstFile {
 	AstNode *           curr_proc;
 	isize               scope_level;
 	// DeclInfo *          decl_info;   // NOTE(bill): Created in checker
-
+	isize               error_count;
 
 	CommentGroup        lead_comment; // Comment (block) before the decl
 	CommentGroup        line_comment; // Comment after the semicolon

src/string.cpp

@@ -287,6 +287,16 @@ String remove_directory_from_path(String const &s) {
 	}
 	return substring(s, s.len-len, s.len);
 }
+String directory_from_path(String const &s) {
+	isize i = s.len-1;
+	for (; i >= 0; i--) {
+		if (s[i] == '/' ||
+		    s[i] == '\\') {
+			break;
+		}
+	}
+	return substring(s, 0, i);
+}
 
 
 String concatenate_strings(gbAllocator a, String const &x, String const &y) {