neutralize path separator when used in service name

loader/loader_test.go

@@ -2942,3 +2942,22 @@ services:
 		"nofile": {Soft: 20000, Hard: 40000},
 	})
 }
+
+func TestServiceNameWithDots(t *testing.T) {
+	yaml := `
+name: test-service-name-with-dots
+services:
+  test.a.b.c:
+    image: foo
+    ports:
+      - "5432"
+`
+	_, err := LoadWithContext(context.Background(), types.ConfigDetails{
+		ConfigFiles: []types.ConfigFile{
+			{
+				Content: []byte(yaml),
+			},
+		},
+	})
+	assert.NilError(t, err)
+}

tree/path.go

@@ -43,6 +43,7 @@ func (p Path) Next(part string) Path {
 	if p == "" {
 		return Path(part)
 	}
+	part = strings.ReplaceAll(part, pathSeparator, "👻")
 	return Path(string(p) + pathSeparator + part)
 }
 
@@ -80,3 +81,7 @@ func (p Path) Parent() Path {
 	}
 	return ""
 }
+
+func (p Path) String() string {
+	return strings.ReplaceAll(string(p), "👻", pathSeparator)
+}