genql: quick hack at variables

example/caller.go

@@ -34,6 +34,12 @@ func Main() {
 		return
 	}
 
+	if len(os.Args) != 2 {
+		err = fmt.Errorf("usage: %v <username>", os.Args[0])
+		return
+	}
+	username := os.Args[1]
+
 	httpClient := http.Client{
 		Transport: &authedTransport{
 			key:     key,
@@ -41,10 +47,16 @@ func Main() {
 		},
 	}
 	graphqlClient := graphql.NewClient("https://api.github.com/graphql", &httpClient)
-	resp, err := getViewer(context.Background(), graphqlClient)
+
+	viewerResp, err := getViewer(context.Background(), graphqlClient)
 	if err != nil {
 		return
 	}
+	fmt.Println("you are", *viewerResp.Viewer.Name)
 
-	fmt.Println("you are:", *resp.Viewer.Name)
+	userResp, err := getUser(context.Background(), graphqlClient, username)
+	if err != nil {
+		return
+	}
+	fmt.Println(username, "is", *userResp.User.Name)
 }

example/generated.go

@@ -14,6 +14,7 @@ type getViewerResponse = struct {
 
 // TODO
 func getViewer(ctx context.Context, client *graphql.Client) (*getViewerResponse, error) {
+
 	var retval getViewerResponse
 	err := client.MakeRequest(ctx, `
 query getViewer {
@@ -21,6 +22,31 @@ query getViewer {
 		Name: name
 	}
 }
-`, &retval)
+`, &retval, nil)
+	return &retval, err
+}
+
+type getUserResponse = struct {
+	User *struct {
+		Name *string
+	}
+}
+
+// TODO
+func getUser(ctx context.Context, client *graphql.Client, login string) (*getUserResponse, error) {
+
+	variables := map[string]interface{}{
+
+		"login": login,
+	}
+
+	var retval getUserResponse
+	err := client.MakeRequest(ctx, `
+query getUser ($login: String!) {
+	User: user(login: $login) {
+		Name: name
+	}
+}
+`, &retval, variables)
 	return &retval, err
 }

example/queries.graphql

@@ -4,3 +4,10 @@ query getViewer {
     Name: name
   }
 }
+
+# getUser gets the given user's name.
+query getUser($login: String!) {
+  User: user(login: $login) {
+    Name: name
+  }
+}