github.com/coreos/mantle@v0.13.0/auth/do.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 DOConfigPath = ".config/digitalocean.json"
    26  
    27  // DOProfile represents a parsed DigitalOcean profile.  This is a custom
    28  // format specific to Mantle.
    29  type DOProfile struct {
    30  	AccessToken string `json:"token"`
    31  }
    32  
    33  // ReadDOConfig decodes a DigitalOcean config file, which is a custom format
    34  // used by Mantle to hold personal access tokens.
    35  //
    36  // If path is empty, $HOME/.config/digitalocean.json is read.
    37  func ReadDOConfig(path string) (map[string]DOProfile, error) {
    38  	if path == "" {
    39  		user, err := user.Current()
    40  		if err != nil {
    41  			return nil, err
    42  		}
    43  		path = filepath.Join(user.HomeDir, DOConfigPath)
    44  	}
    45  
    46  	f, err := os.Open(path)
    47  	if err != nil {
    48  		return nil, err
    49  	}
    50  	defer f.Close()
    51  
    52  	var profiles map[string]DOProfile
    53  	if err := json.NewDecoder(f).Decode(&profiles); err != nil {
    54  		return nil, err
    55  	}
    56  	if len(profiles) == 0 {
    57  		return nil, fmt.Errorf("DigitalOcean config %q contains no profiles", path)
    58  	}
    59  
    60  	return profiles, nil
    61  }