feat(lib): provide path to abs func

Signed-off-by: Jiyong Huang <huangjy@emqx.io>

internal/conf/path.go

@@ -164,12 +164,16 @@ func relativePath(subdir string) (dir string, err error) {
 }
 
 func ProcessPath(p string) (string, error) {
-	if abs, err := filepath.Abs(p); err != nil {
-		return "", nil
-	} else {
-		if _, err := os.Stat(abs); os.IsNotExist(err) {
+	abs := p
+	var err error
+	if !filepath.IsAbs(p) {
+		abs, err = GetLoc(p)
+		if err != nil {
 			return "", err
 		}
-		return abs, nil
 	}
+	if _, err := os.Stat(abs); os.IsNotExist(err) {
+		return "", err
+	}
+	return abs, nil
 }

pkg/path/path.go

@@ -0,0 +1,28 @@
+// Copyright 2024 EMQ Technologies Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package path
+
+import (
+	"path/filepath"
+
+	"github.com/lf-edge/ekuiper/contract/v2/api"
+)
+
+func AbsPath(ctx api.StreamContext, path string) string {
+	if filepath.IsAbs(path) {
+		return path
+	}
+	return filepath.Join(ctx.GetRootPath(), path)
+}