github.com/docker/docker-ce@v17.12.1-ce-rc2+incompatible/components/cli/opts/config.go (about)

     1  package opts
     2  
     3  import (
     4  	"encoding/csv"
     5  	"fmt"
     6  	"os"
     7  	"strconv"
     8  	"strings"
     9  
    10  	swarmtypes "github.com/docker/docker/api/types/swarm"
    11  )
    12  
    13  // ConfigOpt is a Value type for parsing configs
    14  type ConfigOpt struct {
    15  	values []*swarmtypes.ConfigReference
    16  }
    17  
    18  // Set a new config value
    19  func (o *ConfigOpt) Set(value string) error {
    20  	csvReader := csv.NewReader(strings.NewReader(value))
    21  	fields, err := csvReader.Read()
    22  	if err != nil {
    23  		return err
    24  	}
    25  
    26  	options := &swarmtypes.ConfigReference{
    27  		File: &swarmtypes.ConfigReferenceFileTarget{
    28  			UID:  "0",
    29  			GID:  "0",
    30  			Mode: 0444,
    31  		},
    32  	}
    33  
    34  	// support a simple syntax of --config foo
    35  	if len(fields) == 1 {
    36  		options.File.Name = fields[0]
    37  		options.ConfigName = fields[0]
    38  		o.values = append(o.values, options)
    39  		return nil
    40  	}
    41  
    42  	for _, field := range fields {
    43  		parts := strings.SplitN(field, "=", 2)
    44  		key := strings.ToLower(parts[0])
    45  
    46  		if len(parts) != 2 {
    47  			return fmt.Errorf("invalid field '%s' must be a key=value pair", field)
    48  		}
    49  
    50  		value := parts[1]
    51  		switch key {
    52  		case "source", "src":
    53  			options.ConfigName = value
    54  		case "target":
    55  			options.File.Name = value
    56  		case "uid":
    57  			options.File.UID = value
    58  		case "gid":
    59  			options.File.GID = value
    60  		case "mode":
    61  			m, err := strconv.ParseUint(value, 0, 32)
    62  			if err != nil {
    63  				return fmt.Errorf("invalid mode specified: %v", err)
    64  			}
    65  
    66  			options.File.Mode = os.FileMode(m)
    67  		default:
    68  			return fmt.Errorf("invalid field in config request: %s", key)
    69  		}
    70  	}
    71  
    72  	if options.ConfigName == "" {
    73  		return fmt.Errorf("source is required")
    74  	}
    75  
    76  	o.values = append(o.values, options)
    77  	return nil
    78  }
    79  
    80  // Type returns the type of this option
    81  func (o *ConfigOpt) Type() string {
    82  	return "config"
    83  }
    84  
    85  // String returns a string repr of this option
    86  func (o *ConfigOpt) String() string {
    87  	configs := []string{}
    88  	for _, config := range o.values {
    89  		repr := fmt.Sprintf("%s -> %s", config.ConfigName, config.File.Name)
    90  		configs = append(configs, repr)
    91  	}
    92  	return strings.Join(configs, ", ")
    93  }
    94  
    95  // Value returns the config requests
    96  func (o *ConfigOpt) Value() []*swarmtypes.ConfigReference {
    97  	return o.values
    98  }