copy: support for include/exclude

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

pkg/dagger.io/dagger/core/fs.cue

@@ -76,6 +76,10 @@ import "dagger.io/dagger"
 	source: string | *"/"
 	// Destination path (optional)
 	dest: string | *"/"
+	// Optionally exclude certain files
+	include: [...string]
+	// Optionally include certain files
+	exclude: [...string]
 	// Output of the operation
 	output: dagger.#FS
 }

pkg/universe.dagger.io/docker/build.cue

@@ -45,6 +45,10 @@ import (
 	contents: dagger.#FS
 	source:   string | *"/"
 	dest:     string | *"/"
+	// Optionally exclude certain files
+	include: [...string]
+	// Optionally include certain files
+	exclude: [...string]
 
 	// Execute copy operation
 	_copy: core.#Copy & {
@@ -52,6 +56,8 @@ import (
 		"contents": contents
 		"source":   source
 		"dest":     dest
+		"include":  include
+		"exclude":  exclude
 	}
 
 	output: #Image & {

plan/task/copy.go

@@ -49,18 +49,31 @@ func (t *copyTask) Run(ctx context.Context, pctx *plancontext.Context, s *solver
 		return nil, err
 	}
 
+	var filters struct {
+		Include []string
+		Exclude []string
+	}
+
+	if err := v.Decode(&filters); err != nil {
+		return nil, err
+	}
+
+	// FIXME: allow more configurable llb options
+	// For now we define the following convenience presets.
+	opts := &llb.CopyInfo{
+		CopyDirContentsOnly: true,
+		CreateDestPath:      true,
+		AllowWildcard:       true,
+		IncludePatterns:     filters.Include,
+		ExcludePatterns:     filters.Exclude,
+	}
+
 	outputState := inputState.File(
 		llb.Copy(
 			contentsState,
 			sourcePath,
 			destPath,
-			// FIXME: allow more configurable llb options
-			// For now we define the following convenience presets:
-			&llb.CopyInfo{
-				CopyDirContentsOnly: true,
-				CreateDestPath:      true,
-				AllowWildcard:       true,
-			},
+			opts,
 		),
 		withCustomName(v, "Copy %s %s", sourcePath, destPath),
 	)