engine.#Copy

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

plan/task/copy.go

@@ -0,0 +1,92 @@
+package task
+
+import (
+	"context"
+	"fmt"
+
+	"cuelang.org/go/cue"
+	"github.com/moby/buildkit/client/llb"
+	"go.dagger.io/dagger/compiler"
+	"go.dagger.io/dagger/plancontext"
+	"go.dagger.io/dagger/solver"
+)
+
+func init() {
+	Register("Copy", func() Task { return &copyTask{} })
+}
+
+type copyTask struct {
+}
+
+func (t *copyTask) Run(ctx context.Context, pctx *plancontext.Context, s solver.Solver, v *compiler.Value) (*compiler.Value, error) {
+	var err error
+
+	input, err := pctx.FS.FromValue(v.Lookup("input"))
+
+	if err != nil {
+		return nil, err
+	}
+
+	inputState, err := input.Result().ToState()
+
+	if err != nil {
+		return nil, err
+	}
+
+	sourceRoot, err := pctx.FS.FromValue(v.Lookup("source.root"))
+
+	if err != nil {
+		return nil, err
+	}
+
+	sourceState, err := sourceRoot.Result().ToState()
+
+	if err != nil {
+		return nil, err
+	}
+
+	sourcePath, err := v.Lookup("source.path").String()
+	fmt.Println(sourcePath)
+
+	if err != nil {
+		return nil, err
+	}
+
+	destPath, err := v.Lookup("dest").String()
+
+	if err != nil {
+		return nil, err
+	}
+
+	outputState := inputState.File(
+		llb.Copy(
+			sourceState,
+			sourcePath,
+			destPath,
+			// FIXME: allow more configurable llb options
+			// For now we define the following convenience presets:
+			&llb.CopyInfo{
+				CopyDirContentsOnly: true,
+				CreateDestPath:      true,
+				AllowWildcard:       true,
+			},
+		),
+		withCustomName(v, "Copy %s %s", sourcePath, destPath),
+	)
+
+	result, err := s.Solve(ctx, outputState, pctx.Platform.Get())
+
+	if err != nil {
+		return nil, err
+	}
+
+	fs := pctx.FS.New(result)
+
+	output := compiler.NewValue()
+
+	if err := output.FillPath(cue.ParsePath("output"), fs.MarshalCUE()); err != nil {
+		return nil, err
+	}
+
+	return output, nil
+}