ww: preserve command package identities

lib/ww/syntax/parse.ww

@@ -49,6 +49,9 @@ export type parser = struct {
 	// Hidden package-driver alias for the toolchain `package test` source.
 	// Empty outside that one separate-compilation edge.
 	testmodule: str,
+	// Selected command-family validation: main/main_test classifies the
+	// package without replacing the resetmod canonical identity.
+	commandpackage: bool,
 };
 
 fn refill(p: *parser) void = {
@@ -71,6 +74,7 @@ export fn parserinit(p: *parser, l: *lex) void = {
 	p.pathmod = "";
 	p.resetmod = "";
 	p.testmodule = "";
+	p.commandpackage = false;
 	refill(p);
 };
 
@@ -619,7 +623,12 @@ export fn parsefile(p: *parser) *node = {
 					p.testmodule, "__wwtest") == 0
 					&& strings.compare(active, "__wwtest") == 0
 					&& strings.compare(name, "test") == 0;
-				if (strings.compare(name, last) != 0 && !testsupport) {
+				let commandpackage: bool = p.commandpackage
+					&& p.pathmod.len == 0 && p.resetmod.len != 0
+					&& (strings.compare(name, "main") == 0
+						|| strings.compare(name, "main_test") == 0);
+				if (strings.compare(name, last) != 0 && !testsupport
+					&& !commandpackage) {
 					errmsg(p, "package does not match import path");
 				};
 			} else {