Embed package files to make builder go-installable (#163)

Signed-off-by: Brian Goff <[email protected]>

embed.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"embed"
+	"io/fs"
+	"path/filepath"
+
+	"dagger.io/dagger"
+)
+
+var (
+	//go:embed hack/cross
+	hackCrossFS embed.FS
+
+	//go:embed packages
+	packagesFS embed.FS
+)
+
+func packageDir(client *dagger.Client, name string) *dagger.Directory {
+	root := client.Directory()
+
+	dir, err := fs.Sub(packagesFS, filepath.Join("packages", name))
+	if err != nil {
+		panic(err)
+	}
+
+	err = fs.WalkDir(dir, ".", func(path string, entry fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		info, err := entry.Info()
+		if err != nil {
+			return err
+		}
+
+		if entry.IsDir() {
+			root = root.WithNewDirectory(path, dagger.DirectoryWithNewDirectoryOpts{Permissions: int(info.Mode().Perm())})
+			return nil
+		}
+
+		dt, err := fs.ReadFile(dir, path)
+		if err != nil {
+			return err
+		}
+		root = root.WithNewFile(path, string(dt), dagger.DirectoryWithNewFileOpts{Permissions: int(info.Mode().Perm())})
+		return nil
+	})
+	if err != nil {
+		panic(err)
+	}
+	return root
+}
+
+func hackCrossDir(client *dagger.Client) *dagger.Directory {
+	root := client.Directory()
+
+	dir, err := fs.Sub(hackCrossFS, "hack/cross")
+	if err != nil {
+		panic(err)
+	}
+
+	err = fs.WalkDir(dir, ".", func(path string, entry fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		info, err := entry.Info()
+		if err != nil {
+			return err
+		}
+
+		if entry.IsDir() {
+			root = root.WithNewDirectory(path, dagger.DirectoryWithNewDirectoryOpts{Permissions: int(info.Mode().Perm())})
+			return nil
+		}
+
+		dt, err := fs.ReadFile(dir, path)
+		if err != nil {
+			return err
+		}
+		root = root.WithNewFile(path, string(dt), dagger.DirectoryWithNewFileOpts{Permissions: int(info.Mode().Perm())})
+		return nil
+	})
+	if err != nil {
+		panic(err)
+	}
+	return root
+}

make.go

@@ -103,6 +103,6 @@ func do(ctx context.Context, client *dagger.Client, cfg *archive.Spec) (*dagger.
 	if err != nil {
 		return nil, err
 	}
-	out := target.Make(cfg)
+	out := target.Make(cfg, packageDir(client, cfg.Pkg), hackCrossDir(client))
 	return out, nil
 }