Expand user home dir in client filesystem

Signed-off-by: Helder Correia <174525+helderco@users.noreply.github.com>

plan/task/util.go

@@ -2,7 +2,9 @@ package task
 
 import (
 	"fmt"
+	"path/filepath"
 
+	"github.com/mitchellh/go-homedir"
 	"github.com/moby/buildkit/client/llb"
 	"go.dagger.io/dagger/compiler"
 )
@@ -16,3 +18,11 @@ func vertexNamef(v *compiler.Value, format string, a ...interface{}) string {
 func withCustomName(v *compiler.Value, format string, a ...interface{}) llb.ConstraintsOpt {
 	return llb.WithCustomName(vertexNamef(v, format, a...))
 }
+
+func clientFilePath(path string) (string, error) {
+	expanded, err := homedir.Expand(path)
+	if err != nil {
+		return "", err
+	}
+	return filepath.Abs(expanded)
+}