func (s *Session) BuildPackage(pkg *PackageData) error {
s.Packages[pkg.ImportPath] = pkg
if pkg.ImportPath == "unsafe" {
return nil
}
if pkg.PkgObj != "" {
var fileInfo os.FileInfo
gopherjsBinary, err := osext.Executable()
if err == nil {
fileInfo, err = os.Stat(gopherjsBinary)
if err == nil {
pkg.SrcModTime = fileInfo.ModTime()
}
}
if err != nil {
os.Stderr.WriteString("Could not get GopherJS binary's modification timestamp. Please report issue.\n")
pkg.SrcModTime = time.Now()
}
for _, importedPkgPath := range pkg.Imports {
ignored := true
for _, pos := range pkg.ImportPos[importedPkgPath] {
importFile := filepath.Base(pos.Filename)
for _, file := range pkg.GoFiles {
if importFile == file {
ignored = false
break
}
}
if !ignored {
break
}
}
if importedPkgPath == "unsafe" || ignored {
continue
}
_, err := s.BuildImportPath(importedPkgPath)
if err != nil {
return err
}
impModeTime := s.Packages[importedPkgPath].SrcModTime
if impModeTime.After(pkg.SrcModTime) {
pkg.SrcModTime = impModeTime
}
}
for _, name := range append(pkg.GoFiles, pkg.JSFiles...) {
fileInfo, err := os.Stat(filepath.Join(pkg.Dir, name))
if err != nil {
return err
}
if fileInfo.ModTime().After(pkg.SrcModTime) {
pkg.SrcModTime = fileInfo.ModTime()
}
}
pkgObjFileInfo, err := os.Stat(pkg.PkgObj)
if err == nil && !pkg.SrcModTime.After(pkgObjFileInfo.ModTime()) {
// package object is up to date, load from disk if library
pkg.UpToDate = true
if pkg.IsCommand() {
return nil
}
objFile, err := os.Open(pkg.PkgObj)
if err != nil {
return err
}
defer objFile.Close()
pkg.Archive, err = compiler.ReadArchive(pkg.PkgObj, pkg.ImportPath, objFile, s.Types)
if err != nil {
return err
}
return nil
}
}
fileSet := token.NewFileSet()
files, err := parse(pkg.Package, pkg.IsTest, fileSet)
if err != nil {
return err
}
importContext := &compiler.ImportContext{
Packages: s.Types,
Import: func(path string) (*compiler.Archive, error) {
return s.buildImportPathWithSrcDir(path, pkg.Dir)
},
}
pkg.Archive, err = compiler.Compile(pkg.ImportPath, files, fileSet, importContext, s.options.Minify)
if err != nil {
return err
}
for _, jsFile := range pkg.JSFiles {
code, err := ioutil.ReadFile(filepath.Join(pkg.Dir, jsFile))
if err != nil {
return err
}
pkg.Archive.IncJSCode = append(pkg.Archive.IncJSCode, []byte("\t(function() {\n")...)
pkg.Archive.IncJSCode = append(pkg.Archive.IncJSCode, code...)
pkg.Archive.IncJSCode = append(pkg.Archive.IncJSCode, []byte("\n\t}).call($global);\n")...)
}
if s.options.Verbose {
fmt.Println(pkg.ImportPath)
}
if pkg.PkgObj == "" || pkg.IsCommand() {
return nil
}
if err := s.writeLibraryPackage(pkg, pkg.PkgObj); err != nil {
if strings.HasPrefix(pkg.PkgObj, s.options.GOROOT) {
// fall back to first GOPATH workspace
firstGopathWorkspace := filepath.SplitList(s.options.GOPATH)[0]
if err := s.writeLibraryPackage(pkg, filepath.Join(firstGopathWorkspace, pkg.PkgObj[len(s.options.GOROOT):])); err != nil {
return err
}
return nil
}
return err
}
return nil
}
func main() {
var location = dom.GetWindow().Top().Location() // We might be inside an iframe, but want to use the location of topmost window.
codeReady := make(chan struct{}) // Used to synchronize when "code" value is ready.
app := angularjs.NewModule("playground", nil, nil)
app.NewController("PlaygroundCtrl", func(scope *angularjs.Scope) {
if strings.HasPrefix(location.Hash, "#/") {
id := location.Hash[2:]
req := xhr.NewRequest("GET", "http://"+snippetStoreHost+"/p/"+id)
req.ResponseType = xhr.ArrayBuffer
go func() {
err := req.Send(nil)
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to load snippet "` + id + `"`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
scope.Apply(func() {
scope.Set("code", string(data))
close(codeReady)
})
}()
} else {
scope.Set("code", "package main\n\nimport (\n\t\"fmt\"\n\t\"github.com/gopherjs/gopherjs/js\"\n)\n\nfunc main() {\n\tfmt.Println(\"Hello, playground\")\n\tjs.Global.Call(\"alert\", \"Hello, JavaScript\")\n\tprintln(\"Hello, JS console\")\n}\n")
close(codeReady)
}
scope.Set("shareUrl", "")
scope.Set("showShareUrl", false)
packages := make(map[string]*compiler.Archive)
var pkgsToLoad map[string]struct{}
importContext := compiler.NewImportContext(func(path string) (*compiler.Archive, error) {
if pkg, found := packages[path]; found {
return pkg, nil
}
pkgsToLoad[path] = struct{}{}
return &compiler.Archive{}, nil
})
fileSet := token.NewFileSet()
pkgsReceived := 0
setupEnvironment(scope)
codeArea := angularjs.ElementById("code")
codeArea.On("input", func(e *angularjs.Event) {
scope.Set("showShareUrl", false)
location.Hash = ""
})
codeArea.On("keydown", func(e *angularjs.Event) {
toInsert := ""
switch e.KeyCode {
case '\t':
toInsert = "\t"
case '\r':
toInsert = "\n"
start := codeArea.Prop("selectionStart").Int()
code := scope.Get("code").String()
i := strings.LastIndex(code[:start], "\n") + 1
for i < start {
c := code[i]
if c != ' ' && c != '\t' {
break
}
toInsert += string(c)
i++
}
}
if toInsert != "" {
scope.Set("showShareUrl", false)
location.Hash = ""
start := codeArea.Prop("selectionStart").Int()
end := codeArea.Prop("selectionEnd").Int()
code := scope.Get("code").String()
scope.Apply(func() {
scope.Set("code", code[:start]+toInsert+code[end:])
})
codeArea.SetProp("selectionStart", start+len(toInsert))
codeArea.SetProp("selectionEnd", start+len(toInsert))
e.PreventDefault()
}
})
var run func(bool)
run = func(loadOnly bool) {
output = nil
scope.Set("output", output)
pkgsToLoad = make(map[string]struct{})
file, err := parser.ParseFile(fileSet, "prog.go", []byte(scope.Get("code").String()), parser.ParseComments)
if err != nil {
if list, ok := err.(scanner.ErrorList); ok {
for _, entry := range list {
output = append(output, Line{"type": "err", "content": entry.Error()})
}
scope.Set("output", output)
return
}
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
return
}
mainPkg, err := compiler.Compile("main", []*ast.File{file}, fileSet, importContext, false)
packages["main"] = mainPkg
if err != nil && len(pkgsToLoad) == 0 {
if list, ok := err.(compiler.ErrorList); ok {
var output []Line
for _, entry := range list {
output = append(output, Line{"type": "err", "content": entry.Error()})
}
scope.Set("output", output)
return
}
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
return
}
var allPkgs []*compiler.Archive
if len(pkgsToLoad) == 0 {
allPkgs, _ = compiler.ImportDependencies(mainPkg, importContext.Import)
}
if len(pkgsToLoad) != 0 {
pkgsReceived = 0
for path := range pkgsToLoad {
req := xhr.NewRequest("GET", "pkg/"+path+".a.js")
req.ResponseType = xhr.ArrayBuffer
go func(path string) {
err := req.Send(nil)
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to load package "` + path + `"`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
packages[path], err = compiler.ReadArchive(path+".a", path, bytes.NewReader(data), importContext.Packages)
if err != nil {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
})
return
}
pkgsReceived++
if pkgsReceived == len(pkgsToLoad) {
run(loadOnly)
}
}(path)
}
return
}
if loadOnly {
return
}
jsCode := bytes.NewBuffer(nil)
jsCode.WriteString("try{\n")
compiler.WriteProgramCode(allPkgs, &compiler.SourceMapFilter{Writer: jsCode})
jsCode.WriteString("} catch (err) {\ngoPanicHandler(err.message);\n}\n")
js.Global.Set("$checkForDeadlock", true)
js.Global.Call("eval", js.InternalObject(jsCode.String()))
}
scope.Set("run", run)
go func() {
<-codeReady // Wait for "code" value to be ready.
run(true)
}()
scope.Set("format", func() {
out, err := format.Source([]byte(scope.Get("code").String()))
if err != nil {
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
return
}
scope.Set("code", string(out))
scope.Set("output", []Line{})
})
scope.Set("share", func() {
req := xhr.NewRequest("POST", "http://"+snippetStoreHost+"/share")
req.ResponseType = xhr.ArrayBuffer
go func() {
err := req.Send([]byte(scope.Get("code").String())) // Send as binary.
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to share snippet`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
scope.Apply(func() {
id := string(data)
location.Hash = "#/" + id
scope.Set("shareUrl", location.String())
scope.Set("showShareUrl", true)
// TODO: Do this better using AngularJS.
// Perhaps using http://stackoverflow.com/questions/14833326/how-to-set-focus-on-input-field/18295416.
go func() {
time.Sleep(time.Millisecond)
dom.GetWindow().Document().GetElementByID("share-url").(*dom.HTMLInputElement).Select()
}()
})
}()
})
// Start watching for hashchange events, and reload snippet if it happens.
dom.GetWindow().Top().AddEventListener("hashchange", false, func(event dom.Event) {
event.PreventDefault()
if strings.HasPrefix(location.Hash, "#/") {
id := location.Hash[2:]
req := xhr.NewRequest("GET", "http://"+snippetStoreHost+"/p/"+id)
req.ResponseType = xhr.ArrayBuffer
go func() {
err := req.Send(nil)
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to load snippet "` + id + `"`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
scope.Apply(func() {
scope.Set("code", string(data))
})
}()
}
})
})
}