Complete move to $dagger: task: _name

Signed-off-by: Joel Longtine <joel@dagger.io>

plan/task/task.go

@@ -17,7 +17,10 @@ import (
 var (
 	ErrNotTask = errors.New("not a task")
 	tasks      sync.Map
-	typePath   = cue.MakePath(cue.Hid("_type", stdlib.EnginePackage))
+	typePath   = cue.MakePath(
+		cue.Str("$dagger"),
+		cue.Str("task"),
+		cue.Hid("_name", stdlib.EnginePackage))
 )
 
 type NewFunc func() Task

stdlib/europa/dagger/engine/exec.cue

@@ -2,7 +2,6 @@ package engine
 
 // Execute a command in a container
 #Exec: {
-	_type: "Exec"
 	$dagger: task: _name: "Exec"
 
 	// Container filesystem

stdlib/europa/dagger/engine/fs.cue

@@ -2,7 +2,6 @@ package engine
 
 // Read a file from a filesystem tree
 #ReadFile: {
-	_type: "ReadFile"
 	$dagger: task: _name: "ReadFile"
 
 	// Filesystem tree holding the file
@@ -18,7 +17,6 @@ package engine
 
 // Write a file to a filesystem tree, creating it if needed
 #WriteFile: {
-	_type: "WriteFile"
 	$dagger: task: _name: "WriteFile"
 
 	// Input filesystem tree

stdlib/europa/dagger/engine/image.cue

@@ -47,7 +47,6 @@ package engine
 
 // Download a container image from a remote repository
 #Pull: {
-	_type: "Pull"
 	$dagger: task: _name: "Pull"
 
 	// Repository source ref

stdlib/europa/dagger/engine/plan.cue

@@ -35,7 +35,7 @@ package engine
 
 _#inputDirectory: {
 	// FIXME: rename to "InputDirectory" for consistency
-	_type: "LocalDirectory"
+	$dagger: task: _name: "LocalDirectory"
 
 	// Import from this path ON THE CLIENT MACHINE
 	// Example: "/Users/Alice/dev/todoapp/src"
@@ -72,11 +72,11 @@ _#inputSecret: {
 		interactive: true | *false
 	} | {
 		// Read secret from a file ON THE CLIENT MACHINE
-		_type: "SecretFile"
-		path:  string
+		$dagger: task: _name: "SecretFile"
+		path: string
 	} | {
 		// Read secret from an environment variable ON THE CLIENT MACHINE
-		_type:  "SecretEnv"
+		$dagger: task: _name: "SecretEnv"
 		envvar: string
 	}
 }
@@ -96,7 +96,7 @@ _#outputDirectory: {
 _#proxyEndpoint: {
 	// Service endpoint can be proxied to action containers as unix sockets
 	// FIXME: should #Service be renamed to #ServiceEndpoint or #Endpoint? Naming things is hard...
-	_type: "Service"
+	$dagger: task: _name: "Service"
 	// FIXME: should be endpoint
 	service:  #Service
 	endpoint: service