Added VFS and Single binary build packaging feature

.travis.yml

@@ -11,7 +11,7 @@ branches:
 
 go:
   - 1.9.x
-  - 1.10.x
+  - 1.x
   - tip
 
 go_import_path: aahframework.org/aah.v0

aah.go

@@ -28,6 +28,7 @@ import (
 	"aahframework.org/log.v0"
 	"aahframework.org/router.v0"
 	"aahframework.org/security.v0"
+	"aahframework.org/vfs.v0"
 	"aahframework.org/ws.v0"
 	"golang.org/x/crypto/acme/autocert"
 )
@@ -57,7 +58,8 @@ type BuildInfo struct {
 
 func newApp() *app {
 	aahApp := &app{
-		mu: new(sync.Mutex),
+		vfs: new(vfs.VFS),
+		mu:  new(sync.Mutex),
 	}
 
 	aahApp.he = &HTTPEngine{
@@ -82,7 +84,8 @@ func newApp() *app {
 // app struct represents aah application.
 type app struct {
 	physicalPathMode       bool
-	isPackaged             bool
+	packagedMode           bool
+	embeddedMode           bool
 	serverHeaderEnabled    bool
 	requestIDEnabled       bool
 	gzipEnabled            bool
@@ -97,7 +100,6 @@ type app struct {
 	multipartMaxMemory     int64
 	maxBodyBytes           int64
 	name                   string
-	appType                string
 	importPath             string
 	baseDir                string
 	envProfile             string
@@ -114,6 +116,7 @@ type app struct {
 	defaultContentType     *ahttp.ContentType
 
 	cfg            *config.Config
+	vfs            *vfs.VFS
 	tlsCfg         *tls.Config
 	he             *HTTPEngine
 	wse            *ws.Engine
@@ -235,6 +238,10 @@ func (a *app) BaseDir() string {
 	return a.baseDir
 }
 
+func (a *app) VirtualBaseDir() string {
+	return "/app"
+}
+
 func (a *app) ImportPath() string {
 	return a.importPath
 }
@@ -260,11 +267,20 @@ func (a *app) SetBuildInfo(bi *BuildInfo) {
 }
 
 func (a *app) IsPackaged() bool {
-	return a.isPackaged
+	return a.packagedMode
 }
 
+// TODO remove pack parameter
 func (a *app) SetPackaged(pack bool) {
-	a.isPackaged = pack
+	a.packagedMode = pack
+}
+
+func (a *app) IsEmbeddedMode() bool {
+	return a.embeddedMode
+}
+
+func (a *app) SetEmbeddedMode() {
+	a.embeddedMode = true
 }
 
 func (a *app) Profile() string {
@@ -349,14 +365,14 @@ func (a *app) WSEngine() *ws.Engine {
 	return a.wse
 }
 
+func (a *app) VFS() *vfs.VFS {
+	return a.vfs
+}
+
 //‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
 // app Unexported methods
 //______________________________________________________________________________
 
-func (a *app) configDir() string {
-	return filepath.Join(a.BaseDir(), "config")
-}
-
 func (a *app) logsDir() string {
 	return filepath.Join(a.BaseDir(), "logs")
 }
@@ -371,6 +387,16 @@ func (a *app) showDeprecatedMsg(msg string, v ...interface{}) {
 }
 
 func (a *app) initPath() (err error) {
+	defer func() {
+		er := a.VFS().AddMount(a.VirtualBaseDir(), a.BaseDir())
+		if er != nil && er.(*os.PathError).Err == vfs.ErrMountExists {
+			// Update app-base-dir to infered base directory
+			if m, er := a.VFS().FindMount(a.VirtualBaseDir()); er == nil {
+				m.Proot = a.BaseDir()
+			}
+		}
+	}()
+
 	if goPath, err = ess.GoPath(); err != nil && !a.IsPackaged() {
 		return
 	}
@@ -390,26 +416,30 @@ func (a *app) initPath() (err error) {
 	// import path mode
 	goSrcDir = filepath.Join(goPath, "src")
 	a.baseDir = filepath.Join(goSrcDir, filepath.FromSlash(a.ImportPath()))
-	if a.isPackaged {
+	if a.IsPackaged() {
 		ep, er := os.Executable()
 		if er != nil {
 			err = er
 			return
 		}
-		a.baseDir = filepath.Clean(filepath.Dir(filepath.Dir(ep)))
+
+		if a.embeddedMode {
+			a.baseDir = filepath.Dir(ep)
+		} else {
+			a.baseDir = filepath.Dir(filepath.Dir(ep))
+		}
+		a.baseDir = filepath.Clean(a.baseDir)
 	}
 
 	if !ess.IsFileExists(a.BaseDir()) {
 		err = fmt.Errorf("import path does not exists: %s", a.ImportPath())
 	}
-
 	return
 }
 
 func (a *app) initConfigValues() (err error) {
 	cfg := a.Config()
 	a.name = cfg.StringDefault("name", filepath.Base(a.BaseDir()))
-	a.appType = strings.ToLower(cfg.StringDefault("type", ""))
 
 	a.envProfile = cfg.StringDefault("env.active", defaultEnvProfile)
 	if err = a.SetProfile(a.Profile()); err != nil {
@@ -447,7 +477,7 @@ func (a *app) initConfigValues() (err error) {
 		return err
 	}
 
-	if a.appType != "websocket" {
+	if a.Type() != "websocket" {
 		maxBodySizeStr := cfg.StringDefault("request.max_body_size", "5mb")
 		if a.maxBodyBytes, err = ess.StrToBytes(maxBodySizeStr); err != nil {
 			return errors.New("'request.max_body_size' value is not a valid size unit")

aah_test.go

@@ -251,6 +251,9 @@ func newTestServer(t *testing.T, importPath string) (*testServer, error) {
 		Version:    "1.0.0",
 	})
 
+	err := ts.app.VFS().AddMount(ts.app.VirtualBaseDir(), importPath)
+	assert.FailOnError(t, err, "not expecting any error")
+
 	if err := ts.app.Init(importPath); err != nil {
 		return nil, err
 	}
@@ -301,63 +304,39 @@ func (ts *testServer) manualInit() {
 
 	// adding controller
 	ts.app.AddController((*testSiteController)(nil), []*ainsp.Method{
-		{
-			Name:       "Index",
-			Parameters: []*ainsp.Parameter{},
-		},
-		{
-			Name:       "Text",
-			Parameters: []*ainsp.Parameter{},
-		},
+		{Name: "Index"},
+		{Name: "Text"},
 		{
 			Name: "Redirect",
 			Parameters: []*ainsp.Parameter{
-				&ainsp.Parameter{Name: "mode", Type: reflect.TypeOf((*string)(nil))},
+				{Name: "mode", Type: reflect.TypeOf((*string)(nil))},
 			},
 		},
 		{
 			Name: "FormSubmit",
 			Parameters: []*ainsp.Parameter{
-				&ainsp.Parameter{Name: "id", Type: reflect.TypeOf((*int)(nil))},
-				&ainsp.Parameter{Name: "info", Type: reflect.TypeOf((**sample)(nil))},
+				{Name: "id", Type: reflect.TypeOf((*int)(nil))},
+				{Name: "info", Type: reflect.TypeOf((**sample)(nil))},
 			},
 		},
 		{
 			Name: "CreateRecord",
 			Parameters: []*ainsp.Parameter{
-				&ainsp.Parameter{Name: "info", Type: reflect.TypeOf((**sampleJSON)(nil))},
+				{Name: "info", Type: reflect.TypeOf((**sampleJSON)(nil))},
 			},
 		},
-		{
-			Name:       "XML",
-			Parameters: []*ainsp.Parameter{},
-		},
+		{Name: "XML"},
 		{
 			Name: "JSONP",
 			Parameters: []*ainsp.Parameter{
-				&ainsp.Parameter{Name: "callback", Type: reflect.TypeOf((*string)(nil))},
+				{Name: "callback", Type: reflect.TypeOf((*string)(nil))},
 			},
 		},
-		{
-			Name:       "SecureJSON",
-			Parameters: []*ainsp.Parameter{},
-		},
-		{
-			Name:       "TriggerPanic",
-			Parameters: []*ainsp.Parameter{},
-		},
-		{
-			Name:       "BinaryBytes",
-			Parameters: []*ainsp.Parameter{},
-		},
-		{
-			Name:       "SendFile",
-			Parameters: []*ainsp.Parameter{},
-		},
-		{
-			Name:       "Cookies",
-			Parameters: []*ainsp.Parameter{},
-		},
+		{Name: "SecureJSON"},
+		{Name: "TriggerPanic"},
+		{Name: "BinaryBytes"},
+		{Name: "SendFile"},
+		{Name: "Cookies"},
 	})
 
 	// reset controller namespace and key

config.go

@@ -8,7 +8,7 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
-	"path/filepath"
+	"path"
 	"syscall"
 
 	"aahframework.org/config.v0"
@@ -27,8 +27,7 @@ func (a *app) Config() *config.Config {
 //______________________________________________________________________________
 
 func (a *app) initConfig() error {
-	aahConf := filepath.Join(a.configDir(), "aah.conf")
-	cfg, err := config.LoadFile(aahConf)
+	cfg, err := config.VFSLoadFile(a.VFS(), path.Join(a.VirtualBaseDir(), "config", "aah.conf"))
 	if err != nil {
 		return fmt.Errorf("aah.conf: %s", err)
 	}

default.go

@@ -15,6 +15,7 @@ import (
 	"aahframework.org/router.v0"
 	"aahframework.org/security.v0"
 	"aahframework.org/security.v0/session"
+	"aahframework.org/vfs.v0"
 	"aahframework.org/view.v0"
 	"aahframework.org/ws.v0"
 )
@@ -49,14 +50,22 @@ func AppProfile() string {
 	return defaultApp.Profile()
 }
 
-// AppBaseDir method returns the application base or binary current directory
+// AppBaseDir method returns the application base or binary's base directory
 // 	For e.g.:
 // 		$GOPATH/src/github.com/user/myproject
 // 		<app/binary/path/base/directory>
 func AppBaseDir() string {
 	return defaultApp.BaseDir()
 }
 
+// AppVirtualBaseDir method returns "/app". In `v0.11.0` Virtual FileSystem (VFS)
+// introduced in aah to provide single binary build package and also provides
+// seamless experience Read-Only access to application directory and its sub-tree
+// across OS platform via `aah.AppVFS()`.
+func AppVirtualBaseDir() string {
+	return defaultApp.VirtualBaseDir()
+}
+
 // AppImportPath method returns the application Go import path.
 func AppImportPath() string {
 	return defaultApp.ImportPath()
@@ -115,10 +124,25 @@ func SetAppBuildInfo(bi *BuildInfo) {
 }
 
 // SetAppPackaged method sets the info of binary is packaged or not.
+//
+// It is used by framework during application startup. IT'S NOT FOR AAH USER(S).
 func SetAppPackaged(pack bool) {
 	defaultApp.SetPackaged(pack)
 }
 
+// AppIsEmbeddedMode method returns true if application VFS is running embeded mode,
+// otherwise false. It means aah VFS embeds the mounted files within binary.
+func AppIsEmbeddedMode() bool {
+	return defaultApp.embeddedMode
+}
+
+// AppSetEmbeddedMode method sets the application VFS mode to embeded state.
+//
+// It is used by framework during VFS setup. IT'S NOT FOR AAH USER(S).
+func AppSetEmbeddedMode() {
+	defaultApp.SetEmbeddedMode()
+}
+
 // NewChildLogger method create a child logger from aah application default logger.
 func NewChildLogger(fields log.Fields) log.Loggerer {
 	return defaultApp.NewChildLogger(fields)
@@ -218,6 +242,11 @@ func AppWSEngine() *ws.Engine {
 	return defaultApp.WSEngine()
 }
 
+// AppVFS method returns aah Virtual FileSystem instance.
+func AppVFS() *vfs.VFS {
+	return defaultApp.VFS()
+}
+
 // AddController method adds given controller into controller registory.
 func AddController(c interface{}, methods []*ainsp.Method) {
 	defaultApp.AddController(c, methods)
@@ -258,11 +287,6 @@ func SetErrorHandler(handlerFunc ErrorHandlerFunc) {
 	defaultApp.errorMgr.SetHandler(handlerFunc)
 }
 
-// Middlewares method adds given middleware into middleware stack
-func Middlewares(middlewares ...MiddlewareFunc) {
-	defaultApp.he.Middlewares(middlewares...)
-}
-
 // AddLoggerHook method adds given logger into aah application default logger.
 func AddLoggerHook(name string, hook log.HookFunc) error {
 	return defaultApp.AddLoggerHook(name, hook)

default_test.go

@@ -62,6 +62,7 @@ func TestDefaultApp(t *testing.T) {
 	assert.NotNil(t, AppViewEngine())
 	assert.NotNil(t, AppSecurityManager())
 	assert.NotNil(t, AppSessionManager())
+	assert.NotNil(t, AppVFS())
 
 	// Default App Start and Shutdown
 	t.Log("Default App Start and Shutdown")
@@ -90,8 +91,6 @@ func TestDefaultApp(t *testing.T) {
 		return true
 	})
 
-	Middlewares(ToMiddleware(thirdPartyMiddleware1))
-
 	AddLoggerHook("testhook", func(e log.Entry) {
 		t.Log("test logger hook")
 	})