Fix redirects for pages repo

handler.go

@@ -148,6 +148,12 @@ func handler(ctx *fasthttp.RequestCtx) {
 		// Check if the first directory is a repo with the second directory as a branch
 		// example.codeberg.page/myrepo/@main/index.html
 		if len(pathElements) > 1 && strings.HasPrefix(pathElements[1], "@") {
+			if targetRepo == "pages" {
+				// example.codeberg.org/pages/@... redirects to example.codeberg.org/@...
+				ctx.Redirect("/" + strings.Join(pathElements[1:], "/"), fasthttp.StatusMovedPermanently)
+				return
+			}
+
 			if tryBranch(pathElements[0], pathElements[1][1:], pathElements[2:],
 				"/"+pathElements[0]+"/%p",
 			) {
@@ -171,7 +177,8 @@ func handler(ctx *fasthttp.RequestCtx) {
 
 		// Check if the first directory is a repo with a "pages" branch
 		// example.codeberg.page/myrepo/index.html
-		if tryBranch(pathElements[0], "pages", pathElements[1:], "") {
+		// example.codeberg.page/pages/... is not allowed here.
+		if pathElements[0] != "pages" && tryBranch(pathElements[0], "pages", pathElements[1:], "") {
 			tryUpstream()
 			return
 		}

main.go

@@ -2,11 +2,13 @@
 //
 // Mapping custom domains is not static anymore, but can be done with DNS:
 //
-// 1) add a "domains.txt" text file to your repository, containing the allowed domains, separated by new lines.
+// 1) add a "domains.txt" text file to your repository, containing the allowed domains, separated by new lines. The
+// first line will be the canonical domain/URL; all other occurrences will be redirected to it.
 //
 // 2) add a CNAME entry to your domain, pointing to "[[{branch}.]{repo}.]{owner}.codeberg.page" (repo defaults to
 // "pages", "branch" defaults to the default branch if "repo" is "pages", or to "pages" if "repo" is something else):
 //      www.example.org. IN CNAME main.pages.example.codeberg.page.
+//
 // 3) if a CNAME is set for "www.example.org", you can redirect there from the naked domain by adding an ALIAS record
 // for "example.org" (if your provider allows ALIAS or similar records):
 //      example.org IN ALIAS codeberg.page.