From 794df257a7e99a9c01ab5d89502c510eb39bbeae Mon Sep 17 00:00:00 2001
From: Bernard Xie <bernard@terrastruct.com>
Date: Mon, 21 Nov 2022 11:05:10 -0800
Subject: [PATCH] typecast, fix fmt

---
 go.mod         | 2 +-
 lib/png/png.go | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/go.mod b/go.mod
index ad2069c4d..c6a3a9e17 100644
--- a/go.mod
+++ b/go.mod
@@ -11,6 +11,7 @@ require (
 	github.com/lucasb-eyer/go-colorful v1.2.0
 	github.com/mazznoer/csscolorparser v0.1.3
 	github.com/pkg/browser v0.0.0-20210911075715-681adbf594b8
+	github.com/playwright-community/playwright-go v0.2000.1
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.7.0
 	github.com/yuin/goldmark v1.5.2
@@ -47,7 +48,6 @@ require (
 	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/playwright-community/playwright-go v0.2000.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rogpeppe/go-internal v1.8.0 // indirect
 	github.com/ugorji/go/codec v1.2.6 // indirect
diff --git a/lib/png/png.go b/lib/png/png.go
index 52fe23a7f..c72e4fa91 100644
--- a/lib/png/png.go
+++ b/lib/png/png.go
@@ -8,6 +8,7 @@ import (
 	_ "embed"
 
 	"github.com/playwright-community/playwright-go"
+
 	"oss.terrastruct.com/d2/lib/xmain"
 )
 
@@ -79,7 +80,7 @@ func ConvertSVG(ms *xmain.State, page playwright.Page, svg []byte) ([]byte, erro
 		return nil, fmt.Errorf("failed to generate png: %w\nplease report this issue here: https://github.com/terrastruct/d2/issues/new", err)
 	}
 
-	pngString := fmt.Sprintf("%v", pngInterface)
+	pngString := pngInterface.(string)
 	if !strings.HasPrefix(pngString, pngPrefix) {
 		if len(pngString) > 50 {
 			pngString = pngString[0:50] + "..."