github.com/coreos/mantle@v0.13.0/auth/esx.go (about)

     1  // Copyright 2017 CoreOS, Inc.
     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 auth
    16  
    17  import (
    18  	"encoding/json"
    19  	"fmt"
    20  	"os"
    21  	"os/user"
    22  	"path/filepath"
    23  )
    24  
    25  const ESXConfigPath = ".config/esx.json"
    26  
    27  // ESXProfile represents a parsed ESX profile. This is a custom format
    28  // specific to Mantle.
    29  type ESXProfile struct {
    30  	Server   string `json:"server"`
    31  	User     string `json:"user"`
    32  	Password string `json:"password"`
    33  }
    34  
    35  // ReadESXConfig decodes a ESX config file, which is a custom format
    36  // used by Mantle to hold ESX server information.
    37  //
    38  // If path is empty, $HOME/.config/esx.json is read.
    39  func ReadESXConfig(path string) (map[string]ESXProfile, error) {
    40  	if path == "" {
    41  		user, err := user.Current()
    42  		if err != nil {
    43  			return nil, err
    44  		}
    45  		path = filepath.Join(user.HomeDir, ESXConfigPath)
    46  	}
    47  
    48  	f, err := os.Open(path)
    49  	if err != nil {
    50  		return nil, err
    51  	}
    52  	defer f.Close()
    53  
    54  	var profiles map[string]ESXProfile
    55  	if err := json.NewDecoder(f).Decode(&profiles); err != nil {
    56  		return nil, err
    57  	}
    58  	if len(profiles) == 0 {
    59  		return nil, fmt.Errorf("ESX config %q contains no profiles", path)
    60  	}
    61  
    62  	return profiles, nil
    63  }