github.com/coreos/mantle@v0.13.0/auth/packet.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 PacketConfigPath = ".config/packet.json"
    26  
    27  // PacketProfile represents a parsed Packet profile. This is a custom format
    28  // specific to Mantle.
    29  type PacketProfile struct {
    30  	ApiKey  string `json:"api_key"`
    31  	Project string `json:"project"`
    32  }
    33  
    34  // ReadPacketConfig decodes a Packet config file, which is a custom format
    35  // used by Mantle to hold API keys.
    36  //
    37  // If path is empty, $HOME/.config/packet.json is read.
    38  func ReadPacketConfig(path string) (map[string]PacketProfile, error) {
    39  	if path == "" {
    40  		user, err := user.Current()
    41  		if err != nil {
    42  			return nil, err
    43  		}
    44  		path = filepath.Join(user.HomeDir, PacketConfigPath)
    45  	}
    46  
    47  	f, err := os.Open(path)
    48  	if err != nil {
    49  		return nil, err
    50  	}
    51  	defer f.Close()
    52  
    53  	var profiles map[string]PacketProfile
    54  	if err := json.NewDecoder(f).Decode(&profiles); err != nil {
    55  		return nil, err
    56  	}
    57  	if len(profiles) == 0 {
    58  		return nil, fmt.Errorf("Packet config %q contains no profiles", path)
    59  	}
    60  
    61  	return profiles, nil
    62  }