engine.#Copy matches docker.#Copy

Signed-off-by: Richard Jones <richard@dagger.io>

pkg/dagger.io/dagger/engine/fs.cue

@@ -69,9 +69,15 @@ package engine
 // Copy files from one FS tree to another
 #Copy: {
 	$dagger: task: _name: "Copy"
-
+	// Input of the operation
 	input: #FS
-	#CopyInfo
+	// Contents to copy
+	contents: #FS
+	// Source path (optional)
+	source: string | *"/"
+	// Destination path (optional)
+	dest: string | *"/"
+	// Output of the operation
 	output: #FS
 }
 

pkg/dagger.io/dagger/utils.cue

@@ -26,10 +26,8 @@ import (
 	// Copy action
 	_copy: engine.#Copy & {
 		"input":  engine.#Scratch
-		source: {
+		contents: input
-			root:   input
+		source:   path
-			"path": path
-		}
 		dest:     "/"
 	}
 

plan/task/copy.go

@@ -29,17 +29,17 @@ func (t *copyTask) Run(ctx context.Context, pctx *plancontext.Context, s solver.
 		return nil, err
 	}
 
-	sourceRoot, err := pctx.FS.FromValue(v.Lookup("source.root"))
+	contents, err := pctx.FS.FromValue(v.Lookup("contents"))
 	if err != nil {
 		return nil, err
 	}
 
-	sourceState, err := sourceRoot.State()
+	contentsState, err := contents.State()
 	if err != nil {
 		return nil, err
 	}
 
-	sourcePath, err := v.Lookup("source.path").String()
+	sourcePath, err := v.Lookup("source").String()
 	if err != nil {
 		return nil, err
 	}
@@ -51,7 +51,7 @@ func (t *copyTask) Run(ctx context.Context, pctx *plancontext.Context, s solver.
 
 	outputState := inputState.File(
 		llb.Copy(
-			sourceState,
+			contentsState,
 			sourcePath,
 			destPath,
 			// FIXME: allow more configurable llb options

tests/tasks/copy/copy_exec.cue

@@ -30,12 +30,11 @@ engine.#Plan & {
 
 		copy: engine.#Copy & {
 			input:    image.output
-			source: {
+			contents: exec.output
-				root: exec.output
+			source:   "/output.txt"
-				path: "/output.txt"
-			}
 			dest:     "/output.txt"
 		}
+
 		verify_copy: engine.#ReadFile & {
 			input: copy.output
 			path:  "/output.txt"

tests/tasks/copy/copy_exec_invalid.cue

@@ -30,10 +30,8 @@ engine.#Plan & {
 
 		copy: engine.#Copy & {
 			input:    image.output
-			source: {
+			contents: exec.output
-				root: exec.output
+			source:   "/output.txt"
-				path: "/output.txt"
-			}
 			dest:     "/output.txt"
 		}
 		verify_copy: engine.#ReadFile & {

tests/tasks/copy/copy_file.cue

@@ -24,10 +24,8 @@ engine.#Plan & {
 
 		copy: engine.#Copy & {
 			input:    busybox1_34_1.output
-			source: {
+			contents: alpine3_15_0.output
-				root: alpine3_15_0.output
+			source:   "/etc/alpine-release"
-				path: "/etc/alpine-release"
-			}
 			dest:     "/alpine3_15_0_release"
 		}