Merge pull request #1912 from alixander/fix-routing-plugin-3

fix routing plugin

ci/release/changelogs/next.md

@@ -3,3 +3,5 @@
 #### Improvements 🧹
 
 #### Bugfixes ⛑️
+
+- Fix executable plugins that implement standalone router [#1910](https://github.com/terrastruct/d2/pull/1910)

d2plugin/exec.go

@@ -223,8 +223,8 @@ func (p *execPlugin) RouteEdges(ctx context.Context, g *d2graph.Graph, edges []*
 	}
 
 	in := routeEdgesInput{
-		g:      graphBytes,
-		gedges: graphBytes2,
+		G:      graphBytes,
+		GEdges: graphBytes2,
 	}
 
 	b, err := json.Marshal(in)

d2plugin/plugin.go

@@ -86,8 +86,8 @@ type RoutingPlugin interface {
 }
 
 type routeEdgesInput struct {
-	g      []byte
-	gedges []byte
+	G      []byte `json:"g"`
+	GEdges []byte `json:"gEdges"`
 }
 
 // PluginInfo is the current info information of a plugin.

d2plugin/serve.go

@@ -157,12 +157,12 @@ func routeEdges(ctx context.Context, p RoutingPlugin, ms *xmain.State) error {
 	}
 
 	var g d2graph.Graph
-	if err := d2graph.DeserializeGraph(in.g, &g); err != nil {
+	if err := d2graph.DeserializeGraph(in.G, &g); err != nil {
 		return fmt.Errorf("failed to unmarshal input graph to graph: %s", in)
 	}
 
 	var gedges d2graph.Graph
-	if err := d2graph.DeserializeGraph(in.gedges, &gedges); err != nil {
+	if err := d2graph.DeserializeGraph(in.GEdges, &gedges); err != nil {
 		return fmt.Errorf("failed to unmarshal input edges graph to graph: %s", in)
 	}