From 3eda1b9ed8822bf548e18e436ad2521c28d622ed Mon Sep 17 00:00:00 2001
From: Eric Bower <me@erock.io>
Date: Fri, 10 Jan 2025 09:33:12 -0500
Subject: [PATCH] fix(pgs): add forward slash to prefix of filepath for
 calc_route

---
 pgs/calc_route.go      |  4 ++--
 pgs/calc_route_test.go | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/pgs/calc_route.go b/pgs/calc_route.go
index 1f1bfebd..347fb069 100644
--- a/pgs/calc_route.go
+++ b/pgs/calc_route.go
@@ -194,8 +194,8 @@ func genRedirectRoute(actual string, fromStr string, to string) string {
 
 func calcRoutes(projectName, fp string, userRedirects []*RedirectRule) []*HttpReply {
 	rts := []*HttpReply{}
-	if fp == "" {
-		fp = "/"
+	if !strings.HasPrefix(fp, "/") {
+		fp = "/" + fp
 	}
 	// add route as-is without expansion
 	if !strings.HasSuffix(fp, "/") {
diff --git a/pgs/calc_route_test.go b/pgs/calc_route_test.go
index 8989f9ff..bdeaac0d 100644
--- a/pgs/calc_route_test.go
+++ b/pgs/calc_route_test.go
@@ -624,6 +624,26 @@ func TestCalcRoutes(t *testing.T) {
 				{Filepath: "public/404.html", Status: 404},
 			},
 		},
+		{
+			Name: "implicit-prefix-slash-redirect",
+			Actual: calcRoutes(
+				"public",
+				"software/scripts",
+				[]*RedirectRule{
+					{
+						From:   "/software/concat/*",
+						To:     "/software/scripts/:splat",
+						Status: 301,
+					},
+				},
+			),
+			Expected: []*HttpReply{
+				{Filepath: "public/software/scripts", Status: 200},
+				{Filepath: "public/software/scripts.html", Status: 200},
+				{Filepath: "/software/scripts/", Status: 301},
+				{Filepath: "public/404.html", Status: 404},
+			},
+		},
 	}
 
 	for _, fixture := range fixtures {