github.com/greenpau/go-identity@v1.1.6/internal/utils/file.go (about)

     1  // Copyright 2020 Paul Greenberg greenpau@outlook.com
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package utils
    16  
    17  import (
    18  	"io/ioutil"
    19  	"os"
    20  	"path/filepath"
    21  )
    22  
    23  func expandHomePath(fp string) (string, error) {
    24  	if fp[0] != '~' {
    25  		return fp, nil
    26  	}
    27  	hd, err := os.UserHomeDir()
    28  	if err != nil {
    29  		return fp, err
    30  	}
    31  	fp = filepath.Join(hd, fp[1:])
    32  	return fp, nil
    33  }
    34  
    35  // ReadFileBytes expands home directory and reads a file.
    36  func ReadFileBytes(fp string) ([]byte, error) {
    37  	var err error
    38  	fp, err = expandHomePath(fp)
    39  	if err != nil {
    40  		return nil, err
    41  	}
    42  	return ioutil.ReadFile(fp)
    43  }