Embed default resources in the executable

apple2main.go

@@ -9,11 +9,11 @@ import (
 func MainApple() *Apple2 {
 	romFile := flag.String(
 		"rom",
-		"../romdumps/Apple2_Plus.rom",
+		"<internal>/Apple2_Plus.rom",
 		"main rom file")
 	disk2RomFile := flag.String(
 		"diskRom",
-		"../romdumps/DISK2.rom",
+		"<internal>/DISK2.rom",
 		"rom file for the disk drive controller")
 	disk2Slot := flag.Int(
 		"disk2Slot",
@@ -21,7 +21,7 @@ func MainApple() *Apple2 {
 		"slot for the disk driver. -1 for none.")
 	diskImage := flag.String(
 		"disk",
-		"../romdumps/dos33.dsk",
+		"<internal>/dos33.dsk",
 		"file to load on the first disk drive")
 	cpuClock := flag.Float64(
 		"mhz",
@@ -29,7 +29,7 @@ func MainApple() *Apple2 {
 		"cpu speed in Mhz, use 0 for full speed. Use F5 to toggle.")
 	charRomFile := flag.String(
 		"charRom",
-		"../romdumps/Apple2rev7CharGen.rom",
+		"<internal>/Apple2rev7CharGen.rom",
 		"rom file for the disk drive controller")
 	languageCardSlot := flag.Int(
 		"languageCardSlot",
@@ -83,12 +83,4 @@ func MainApple() *Apple2 {
 	//a.AddCardLogger(4)
 
 	return a
-	/*	if *useSDL {
-			a.ConfigureStdConsole(false, *stdoutScreen)
-			apple2sdl.SDLRun(a)
-		} else {
-			a.ConfigureStdConsole(true, true)
-			a.Run(log)
-		}
-	*/
 }

cardBase.go

@@ -2,7 +2,6 @@ package apple2
 
 import (
 	"io"
-	"io/ioutil"
 )
 
 type card interface {
@@ -23,10 +22,7 @@ func (c *cardBase) loadRom(filename string) {
 	if c.a != nil {
 		panic("Rom must be loaded before inserting the card in the slot")
 	}
-	data, err := ioutil.ReadFile(filename)
-	if err != nil {
-		panic(err)
-	}
+	data := loadResource(filename)
 	c.rom = newMemoryRange(0, data)
 }
 

characterGenerator.go

@@ -2,7 +2,6 @@ package apple2
 
 import (
 	"fmt"
-	"io/ioutil"
 )
 
 /*
@@ -27,10 +26,7 @@ func NewCharacterGenerator(filename string) *CharacterGenerator {
 }
 
 func (cg *CharacterGenerator) load(filename string) {
-	bytes, err := ioutil.ReadFile(filename)
-	if err != nil {
-		panic(err)
-	}
+	bytes := loadResource(filename)
 	size := len(bytes)
 	if size != rev7CharGenSize {
 		panic("Character ROM size not supported")

diskette16sector.go

@@ -1,7 +1,6 @@
 package apple2
 
 import (
-	"io/ioutil"
 	"os"
 )
 
@@ -40,10 +39,7 @@ func (d *diskette16sector) write(track int, position int, value uint8) int {
 func loadDisquette(filename string) *diskette16sector {
 	var d diskette16sector
 
-	data, err := ioutil.ReadFile(filename)
-	if err != nil {
-		panic(err)
-	}
+	data := loadResource(filename)
 	size := len(data)
 
 	if size == nibImageSize {

memoryManager.go

@@ -2,7 +2,6 @@ package apple2
 
 import (
 	"io"
-	"io/ioutil"
 )
 
 // See https://fabiensanglard.net/fd_proxy/prince_of_persia/Inside%20the%20Apple%20IIe.pdf
@@ -122,10 +121,7 @@ const (
 )
 
 func (mmu *memoryManager) loadRom(filename string) {
-	data, err := ioutil.ReadFile(filename)
-	if err != nil {
-		panic(err)
-	}
+	data := loadResource(filename)
 	size := len(data)
 	if size != apple2RomSize && size != apple2eRomSize {
 		panic("Rom size not supported")

resources.go

@@ -0,0 +1,41 @@
+package apple2
+
+import (
+	"io"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/ivanizag/apple2/romdumps"
+)
+
+const (
+	internalPrefix = "<internal>/"
+)
+
+func loadResource(filename string) []uint8 {
+	var file io.Reader
+	if strings.HasPrefix(filename, internalPrefix) {
+		// load from embedded resource
+		resource := strings.TrimPrefix(filename, internalPrefix)
+		resourceFile, err := romdumps.Assets.Open(resource)
+		if err != nil {
+			panic(err)
+		}
+		defer resourceFile.Close()
+		file = resourceFile
+	} else {
+		diskFile, err := os.Open(filename)
+		if err != nil {
+			panic(err)
+		}
+		defer diskFile.Close()
+		file = diskFile
+	}
+
+	data, err := ioutil.ReadAll(file)
+	if err != nil {
+		panic(err)
+	}
+	return data
+}

romdumps/generate/.gitignore

@@ -0,0 +1 @@
+files

romdumps/generate/generate.go

@@ -0,0 +1,24 @@
+// To generate the resources put the files on a "files" subdirectory and run main
+
+package main
+
+import (
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"github.com/shurcooL/vfsgen"
+)
+
+func main() {
+	var cwd, _ = os.Getwd()
+	templates := http.Dir(filepath.Join(cwd, "files"))
+	if err := vfsgen.Generate(templates, vfsgen.Options{
+		Filename:     "../romdumps_vfsdata.go",
+		PackageName:  "romdumps",
+		VariableName: "Assets",
+	}); err != nil {
+		log.Fatalln(err)
+	}
+}