Add: filepath

hash/page/page.go

@@ -63,7 +63,7 @@ func (d *Page) HasData() bool {
 	return d.GetDataSize() > 0
 }
 
-// New will create an instance
+// NewPage will create an instance
 func NewPage(requestOffset int, pageSize int,
 	data []interface{}, totalSize int) *Page {
 

path/filepath/path.go

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 gxfilepath
+
+import (
+	"fmt"
+	"os"
+)
+
+// Exists returns whether the given file or directory exists
+func Exists(path string) (bool, error) {
+	_, err := os.Lstat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+
+	return false, err
+}
+
+// FileExists checks whether a file exists in the given path. It also fails if
+// the path points to a directory or there is an error when trying to check the file.
+func FileExists(path string) (bool, error) {
+	info, err := os.Lstat(path)
+	if err != nil {
+		return false, err
+	}
+	if info.IsDir() {
+		return false, fmt.Errorf("%q is a directory", path)
+	}
+
+	return true, nil
+}
+
+// DirExists checks whether a directory exists in the given path. It also fails
+// if the path is a file rather a directory or there is an error checking whether it exists.
+func DirExists(path string) (bool, error) {
+	info, err := os.Lstat(path)
+	if err != nil {
+		return false, err
+	}
+	if !info.IsDir() {
+		return false, fmt.Errorf("%q is a file", path)
+	}
+
+	return true, nil
+}

path/filepath/path_test.go

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 gxfilepath
+
+import (
+	"testing"
+)
+
+import (
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFileExists(t *testing.T) {
+	file := "./path_test.go"
+	ok, err := Exists(file)
+	assert.True(t, ok)
+	assert.Nil(t, err)
+	ok, err = DirExists(file)
+	assert.False(t, ok)
+	assert.NotNil(t, err)
+	ok, err = FileExists(file)
+	assert.True(t, ok)
+	assert.Nil(t, err)
+
+	file = "./path_test1.go"
+	ok, err = Exists(file)
+	assert.False(t, ok)
+	assert.Nil(t, err)
+	ok, err = DirExists(file)
+	assert.False(t, ok)
+	assert.NotNil(t, err)
+	ok, err = FileExists(file)
+	assert.False(t, ok)
+	assert.NotNil(t, err)
+}
+
+func TestDirExists(t *testing.T) {
+	file := "./"
+	ok, err := Exists(file)
+	assert.True(t, ok)
+	assert.Nil(t, err)
+	ok, err = DirExists(file)
+	assert.True(t, ok)
+	assert.Nil(t, err)
+	ok, err = FileExists(file)
+	assert.False(t, ok)
+	assert.NotNil(t, err)
+
+	file = "./go"
+	ok, err = Exists(file)
+	assert.False(t, ok)
+	assert.Nil(t, err)
+	ok, err = DirExists(file)
+	assert.False(t, ok)
+	assert.NotNil(t, err)
+	ok, err = FileExists(file)
+	assert.False(t, ok)
+	assert.NotNil(t, err)
+}

runtime/sys.go

@@ -32,6 +32,10 @@ import (
 	"github.com/shirou/gopsutil/process"
 )
 
+import (
+	"github.com/dubbogo/gost/path/filepath"
+)
+
 var (
 	CurrentPID = os.Getpid()
 )
@@ -55,20 +59,8 @@ func GetMemoryStat() (total, used, free uint64, usedPercent float64) {
 	return stat.Total, stat.Used, stat.Free, stat.UsedPercent
 }
 
-// exists returns whether the given file or directory exists
-func exists(path string) (bool, error) {
-	_, err := os.Stat(path)
-	if err == nil {
-		return true, nil
-	}
-	if os.IsNotExist(err) {
-		return false, nil
-	}
-	return false, err
-}
-
 func IsCgroup() bool {
-	ok, _ := exists(cgroupMemLimitPath)
+	ok, _ := gxfilepath.Exists(cgroupMemLimitPath)
 	if ok {
 		return true
 	}