Merge pull request #91 from shurcooL/try-using-vfsgen-binary

Replace data_generate.go with a proposed use of vfsgen binary.

traceapp/tmpl/data.go

@@ -6,16 +6,15 @@ import (
 	"go/build"
 	"log"
 	"net/http"
-	"path/filepath"
 )
 
-func defaultBase(path string) string {
-	p, err := build.Import(path, "", build.FindOnly)
+func importPathToDir(importPath string) string {
+	p, err := build.Import(importPath, "", build.FindOnly)
 	if err != nil {
-		log.Fatal(err)
+		log.Fatalln(err)
 	}
 	return p.Dir
 }
 
 // Data is a virtual filesystem that contains template data used by Appdash.
-var Data = http.Dir(filepath.Join(defaultBase("sourcegraph.com/sourcegraph/appdash/traceapp/tmpl"), "data"))
+var Data = http.Dir(importPathToDir("sourcegraph.com/sourcegraph/appdash/traceapp/tmpl/data"))

traceapp/tmpl/doc.go

@@ -3,4 +3,4 @@
 // This package needs to be go generated after making changes to template files.
 package tmpl
 
-//go:generate go run -tags=dev data_generate.go
+//go:generate vfsgendev -source="sourcegraph.com/sourcegraph/appdash/traceapp/tmpl".Data