github.com/zntrio/harp/v2@v2.0.9/pkg/sdk/cmdutil/path.go (about)

     1  // Licensed to Elasticsearch B.V. under one or more contributor
     2  // license agreements. See the NOTICE file distributed with
     3  // this work for additional information regarding copyright
     4  // ownership. Elasticsearch B.V. licenses this file to you under
     5  // the Apache License, Version 2.0 (the "License"); you may
     6  // not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing,
    12  // software distributed under the License is distributed on an
    13  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    14  // KIND, either express or implied.  See the License for the
    15  // specific language governing permissions and limitations
    16  // under the License.
    17  
    18  package cmdutil
    19  
    20  import (
    21  	"errors"
    22  	"fmt"
    23  	"os"
    24  	"path/filepath"
    25  	"runtime"
    26  	"strings"
    27  )
    28  
    29  // ErrNoHome is raised when tilde expansion failed.
    30  var ErrNoHome = errors.New("no home found")
    31  
    32  // Expand a given path using `~` notation for HOMEDIR.
    33  func Expand(path string) (string, error) {
    34  	// Check condition
    35  	if !strings.HasPrefix(path, "~") {
    36  		return path, nil
    37  	}
    38  
    39  	// Retrieve HOMEDIR
    40  	home, err := getHomeDir()
    41  	if err != nil {
    42  		return "", fmt.Errorf("unable to retrieve user home directory path: %w", err)
    43  	}
    44  
    45  	// Return result
    46  	return home + path[1:], nil
    47  }
    48  
    49  func getHomeDir() (string, error) {
    50  	var home string
    51  
    52  	switch runtime.GOOS {
    53  	case "windows":
    54  		// Retrieve windows specific env
    55  		home = filepath.Join(os.Getenv("HomeDrive"), os.Getenv("HomePath"))
    56  		if home == "" {
    57  			home = os.Getenv("UserProfile")
    58  		}
    59  
    60  	default:
    61  		home = os.Getenv("HOME")
    62  	}
    63  
    64  	// Homedir not evaluable ?
    65  	if home == "" {
    66  		return "", ErrNoHome
    67  	}
    68  
    69  	// Return result
    70  	return home, nil
    71  }