github.com/willyham/dosa@v2.3.1-0.20171024181418-1e446d37ee71+incompatible/cmd/dosa/options.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package main
    22  
    23  import (
    24  	"fmt"
    25  	"os"
    26  	"regexp"
    27  	"strconv"
    28  	"strings"
    29  	"time"
    30  
    31  	"github.com/uber-go/dosa"
    32  )
    33  
    34  const (
    35  	_defServiceName  = "dosa-dev-gateway"
    36  	_prodServiceName = "dosa-gateway"
    37  	_prodScope       = "production"
    38  )
    39  
    40  var validNameRegex = regexp.MustCompile("^[a-z]+([a-z0-9]|[^-]-)*[^-]$")
    41  
    42  type callerFlag string
    43  
    44  func (s *callerFlag) setString(value string) {
    45  	*s = callerFlag(strings.Replace(value, ".", "-", -1))
    46  }
    47  
    48  // String implements the stringer interface
    49  func (s *callerFlag) String() string {
    50  	return string(*s)
    51  }
    52  
    53  func (s *callerFlag) UnmarshalFlag(value string) error {
    54  	if value == "" || value == "dosacli-$USER" {
    55  		value = fmt.Sprintf("dosacli-%s", os.Getenv("USER"))
    56  	}
    57  	s.setString(value)
    58  	return nil
    59  }
    60  
    61  type timeFlag time.Duration
    62  
    63  func (t *timeFlag) setDuration(d time.Duration) {
    64  	*t = timeFlag(d)
    65  }
    66  
    67  // Duration returns the flag value as a time.Duration
    68  func (t timeFlag) Duration() time.Duration {
    69  	return time.Duration(t)
    70  }
    71  
    72  // UmarshalFlag satisfies the flag interface
    73  func (t *timeFlag) UnmarshalFlag(value string) error {
    74  	valueInt, err := strconv.Atoi(value)
    75  	if err == nil {
    76  		// We received a number without a unit, assume milliseconds.
    77  		t.setDuration(time.Duration(valueInt) * time.Millisecond)
    78  		return nil
    79  	}
    80  
    81  	d, err := time.ParseDuration(value)
    82  	if err != nil {
    83  		return err
    84  	}
    85  
    86  	t.setDuration(d)
    87  	return nil
    88  }
    89  
    90  func getAdminClient(opts GlobalOptions) (dosa.AdminClient, error) {
    91  	// from YARPC: "must begin with a letter and consist only of dash-delimited
    92  	// lower-case ASCII alphanumeric words" -- we do this here because YARPC
    93  	// will panic if caller name is invalid.
    94  	if !validNameRegex.MatchString(string(opts.CallerName)) {
    95  		return nil, fmt.Errorf("invalid caller name: %s, must begin with a letter and consist only of dash-delimited lower-case ASCII alphanumeric words", opts.CallerName)
    96  	}
    97  
    98  	// create connector
    99  	conn, err := dosa.GetConnector(opts.Connector, map[string]interface{}{
   100  		"transport":   opts.Transport,
   101  		"host":        opts.Host,
   102  		"port":        opts.Port,
   103  		"servicename": opts.ServiceName,
   104  		"callername":  opts.CallerName.String(),
   105  	})
   106  	if err != nil {
   107  		return nil, err
   108  	}
   109  	client := dosa.NewAdminClient(conn)
   110  
   111  	return client, nil
   112  }