fix(worker): fix path with grpc plugin directory

Signed-off-by: Benjamin Coenen <5719034+bnjjj@users.noreply.github.com>

engine/worker/internal/action/grpc_plugin.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"path"
 	"strings"
 
 	"github.com/golang/protobuf/ptypes/empty"
@@ -93,7 +94,7 @@ func RunGRPCPlugin(ctx context.Context, actionName string, params []sdk.Paramete
 		envs = append(envs, fmt.Sprintf("%s=%s", envName, p.Value))
 	}
 
-	pluginSocket, err := startGRPCPlugin(context.Background(), pluginName, w, nil, startGRPCPluginOptions{
+	pluginSocket, err := startGRPCPlugin(ctx, pluginName, w, nil, startGRPCPluginOptions{
 		envs: envs,
 	})
 	if err != nil {
@@ -231,19 +232,36 @@ func startGRPCPlugin(ctx context.Context, pluginName string, w workerruntime.Run
 		}
 	}
 
+	var basedir string
+	if x, ok := w.BaseDir().(*afero.BasePathFs); ok {
+		basedir, _ = x.RealPath(".")
+	} else {
+		basedir = w.BaseDir().Name()
+	}
+
 	cmd := binary.Cmd
 	if _, err := sdk.LookPath(w.BaseDir(), cmd); err != nil {
-		return nil, sdk.WrapError(err, "plugin:%s unable to start GRPC plugin, binary command not found.", pluginName)
+		return nil, sdk.WrapError(err, "plugin:%s unable to find GRPC plugin, binary command not found.", pluginName)
+	}
+	cmd = path.Join(basedir, cmd)
+
+	for i := range binary.Entrypoints {
+		binary.Entrypoints[i] = path.Join(basedir, binary.Entrypoints[i])
 	}
 	args := append(binary.Entrypoints, binary.Args...)
 	var errstart error
 
+	workdir, err := workerruntime.WorkingDirectory(ctx)
+	if err != nil {
+		return nil, err
+	}
 	var dir string
 	if x, ok := w.BaseDir().(*afero.BasePathFs); ok {
-		dir, _ = x.RealPath(".")
+		dir, _ = x.RealPath(workdir.Name())
 	} else {
-		dir = w.BaseDir().Name()
+		dir = workdir.Name()
 	}
+
 	if c.StdPipe, c.Socket, errstart = grpcplugin.StartPlugin(ctx, pluginName, dir, cmd, args, envs); errstart != nil {
 		return nil, sdk.WrapError(errstart, "plugin:%s unable to start GRPC plugin... Aborting", pluginName)
 	}