playground: Change to use stdlib embed instead of packr (#360)

go.mod

@@ -11,7 +11,6 @@ require (
 	github.com/eclipse/paho.mqtt.golang v1.2.0
 	github.com/evanphx/json-patch/v5 v5.1.0
 	github.com/go-test/deep v1.0.4
-	github.com/gobuffalo/packr v1.30.1
 	github.com/gobwas/ws v1.0.4
 	github.com/golang/mock v1.4.1
 	github.com/google/go-cmp v0.5.6
@@ -47,16 +46,13 @@ require (
 	github.com/Masterminds/sprig v2.22.0+incompatible // indirect
 	github.com/agnivade/levenshtein v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.4.9 // indirect
-	github.com/gobuffalo/envy v1.7.0 // indirect
-	github.com/gobuffalo/packd v0.3.0 // indirect
 	github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee // indirect
 	github.com/gobwas/pool v0.2.0 // indirect
 	github.com/google/uuid v1.1.1 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/huandu/xstrings v1.2.1 // indirect
 	github.com/imdario/mergo v0.3.8 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
-	github.com/joho/godotenv v1.3.0 // indirect
 	github.com/klauspost/compress v1.13.1 // indirect
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/logrusorgru/aurora v0.0.0-20200102142835-e9ef32dff381 // indirect
@@ -72,7 +68,6 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/qri-io/jsonpointer v0.1.1 // indirect
-	github.com/rogpeppe/go-internal v1.3.0 // indirect
 	github.com/sirupsen/logrus v1.4.2 // indirect
 	github.com/spf13/afero v1.6.0 // indirect
 	github.com/spf13/cast v1.3.0 // indirect

go.sum

@@ -62,12 +62,9 @@ github.com/go-playground/validator/v10 v10.2.0 h1:KgJ0snyC2R9VXYN2rneOtQcw5aHQB1
 github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
 github.com/go-test/deep v1.0.4 h1:u2CU3YKy9I2pmu9pX0eq50wCgjfGIt539SqR7FbHiho=
 github.com/go-test/deep v1.0.4/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
-github.com/gobuffalo/envy v1.7.0 h1:GlXgaiBkmrYMHco6t4j7SacKO4XUjvh5pwXh0f4uxXU=
 github.com/gobuffalo/envy v1.7.0/go.mod h1:n7DRkBerg/aorDM8kbduw5dN3oXGswK5liaSCx4T5NI=
 github.com/gobuffalo/logger v1.0.0/go.mod h1:2zbswyIUa45I+c+FLXuWl9zSWEiVuthsk8ze5s8JvPs=
-github.com/gobuffalo/packd v0.3.0 h1:eMwymTkA1uXsqxS0Tpoop3Lc0u3kTfiMBE6nKtQU4g4=
 github.com/gobuffalo/packd v0.3.0/go.mod h1:zC7QkmNkYVGKPw4tHpBQ+ml7W/3tIebgeo1b36chA3Q=
-github.com/gobuffalo/packr v1.30.1 h1:hu1fuVR3fXEZR7rXNW3h8rqSML8EVAf6KNm0NKO/wKg=
 github.com/gobuffalo/packr v1.30.1/go.mod h1:ljMyFO2EcrnzsHsN99cvbq055Y9OhRrIaviy289eRuk=
 github.com/gobuffalo/packr/v2 v2.5.1/go.mod h1:8f9c96ITobJlPzI44jj+4tHnEKNt0xXWSVlXRN9X1Iw=
 github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee h1:s+21KNqlpePfkah2I+gwHF8xmJWRjooY+5248k6m4A0=
@@ -129,7 +126,6 @@ github.com/jensneuse/graphql-go-tools v1.20.2/go.mod h1:9e2CqUwCY2lvC7PWnvvOjH2X
 github.com/jensneuse/pipeline v0.0.0-20200117120358-9fb4de085cd6 h1:y8hvuqbuVGFNpEos+vB5I5X+QxWm0uyTk+5oeOinMjY=
 github.com/jensneuse/pipeline v0.0.0-20200117120358-9fb4de085cd6/go.mod h1:UsfzaMt+keVOxa007GcCJMFeTHr6voRfBGMQEW7DkdM=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
-github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
 github.com/joho/godotenv v1.3.0/go.mod h1:7hK45KPybAkOC6peb+G5yklZfMxEjkZhHbwpqxOKXbg=
 github.com/json-iterator/go v1.1.9 h1:9yzud/Ht36ygwatGx56VwCZtlI/2AD15T1X2sjSuGns=
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
@@ -214,7 +210,6 @@ github.com/qri-io/jsonpointer v0.1.1/go.mod h1:DnJPaYgiKu56EuDp8TU5wFLdZIcAnb/uH
 github.com/qri-io/jsonschema v0.2.1 h1:NNFoKms+kut6ABPf6xiKNM5214jzxAhDBrPHCJ97Wg0=
 github.com/qri-io/jsonschema v0.2.1/go.mod h1:g7DPkiOsK1xv6T/Ao5scXRkd+yTFygcANPBaaqW+VrI=
 github.com/rogpeppe/go-internal v1.1.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
-github.com/rogpeppe/go-internal v1.3.0 h1:RR9dF3JtopPvtkroDZuVD7qquD0bnHlKSqaQhgwt8yk=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/rs/cors v1.6.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=

pkg/playground/playground.go

@@ -1,15 +1,13 @@
-//go:generate packr
-
 // Package playground is a http.Handler hosting the GraphQL Playground application.
 package playground
 
 import (
+	"embed"
+	"fmt"
 	"html/template"
 	"net/http"
 	"path"
 	"strings"
-
-	"github.com/gobuffalo/packr"
 )
 
 const (
@@ -27,6 +25,9 @@ const (
 	logoFile    = "logo.png"
 )
 
+//go:embed files/*
+var files embed.FS
+
 // Config is the configuration Object to instruct ConfigureHandlers on how to setup all the http Handlers for the playground
 type Config struct {
 	// PathPrefix is a prefix you intend to put in front of all handlers
@@ -76,7 +77,6 @@ func (h *Handlers) add(path string, handler http.HandlerFunc) {
 // Playground manages the configuration of all HTTP handlers responsible for serving the GraphQL Playground
 type Playground struct {
 	cfg   Config
-	box   packr.Box
 	files []fileConfig
 	data  playgroundTemplateData
 }
@@ -121,7 +121,6 @@ func New(config Config) *Playground {
 
 	return &Playground{
 		cfg:   config,
-		box:   packr.NewBox("./files"),
 		files: files,
 		data:  data,
 	}
@@ -145,11 +144,11 @@ func (p *Playground) Handlers() (handlers Handlers, err error) {
 }
 
 func (p *Playground) configurePlaygroundHandler(handlers *Handlers) (err error) {
-	playgroundHTML, err := p.box.FindString("playground.html")
+	playgroundHTML, err := files.ReadFile("files/playground.html")
 	if err != nil {
 		return
 	}
-	templates, err := template.New(playgroundTemplate).Parse(playgroundHTML)
+	templates, err := template.New(playgroundTemplate).Parse(string(playgroundHTML))
 	if err != nil {
 		return
 	}
@@ -173,7 +172,7 @@ func (p *Playground) configurePlaygroundHandler(handlers *Handlers) (err error)
 }
 
 func (p *Playground) configureFileHandler(handlers *Handlers, file fileConfig) error {
-	data, err := p.box.Find(file.name)
+	data, err := files.ReadFile(fmt.Sprintf("files/%s", file.name))
 	if err != nil {
 		return err
 	}