github.com/cloudfoundry/libcfbuildpack@v1.91.23/test/copy_symlink.go (about)

     1  /*
     2   * Copyright 2018-2020 the original author or authors.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *      https://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package test
    18  
    19  import (
    20  	"fmt"
    21  	"os"
    22  	"path/filepath"
    23  	"testing"
    24  )
    25  
    26  // CopySymlink copies source to destination.  Before writing, it creates all required parent directories for the
    27  // destination.
    28  func CopySymlink(t *testing.T, source string, destination string) {
    29  	t.Helper()
    30  
    31  	if err := os.MkdirAll(filepath.Dir(destination), 0755); err != nil {
    32  		t.Fatal(err)
    33  	}
    34  
    35  	target, err := os.Readlink(source)
    36  	if err != nil {
    37  		t.Fatal(fmt.Errorf("error while reading symlink '%s': %v", source, err))
    38  	}
    39  
    40  	WriteSymlink(t, target, destination)
    41  }