github.com/marksheahan/packer@v0.10.2-0.20160613200515-1acb2d6645a0/builder/docker/config.go (about) 1 package docker 2 3 import ( 4 "fmt" 5 "os" 6 7 "github.com/mitchellh/mapstructure" 8 "github.com/mitchellh/packer/common" 9 "github.com/mitchellh/packer/helper/communicator" 10 "github.com/mitchellh/packer/helper/config" 11 "github.com/mitchellh/packer/packer" 12 "github.com/mitchellh/packer/template/interpolate" 13 ) 14 15 var ( 16 errArtifactNotUsed = fmt.Errorf("No instructions given for handling the artifact; expected commit, discard, or export_path") 17 errArtifactUseConflict = fmt.Errorf("Cannot specify more than one of commit, discard, and export_path") 18 errExportPathNotFile = fmt.Errorf("export_path must be a file, not a directory") 19 errImageNotSpecified = fmt.Errorf("Image must be specified") 20 ) 21 22 type Config struct { 23 common.PackerConfig `mapstructure:",squash"` 24 Comm communicator.Config `mapstructure:",squash"` 25 26 Commit bool 27 Discard bool 28 ExportPath string `mapstructure:"export_path"` 29 Image string 30 Pty bool 31 Pull bool 32 RunCommand []string `mapstructure:"run_command"` 33 Volumes map[string]string 34 Privileged bool `mapstructure:"privileged"` 35 36 // This is used to login to dockerhub to pull a private base container. For 37 // pushing to dockerhub, see the docker post-processors 38 Login bool 39 LoginEmail string `mapstructure:"login_email"` 40 LoginPassword string `mapstructure:"login_password"` 41 LoginServer string `mapstructure:"login_server"` 42 LoginUsername string `mapstructure:"login_username"` 43 44 ctx interpolate.Context 45 } 46 47 func NewConfig(raws ...interface{}) (*Config, []string, error) { 48 c := new(Config) 49 50 var md mapstructure.Metadata 51 err := config.Decode(c, &config.DecodeOpts{ 52 Metadata: &md, 53 Interpolate: true, 54 InterpolateContext: &c.ctx, 55 InterpolateFilter: &interpolate.RenderFilter{ 56 Exclude: []string{ 57 "run_command", 58 }, 59 }, 60 }, raws...) 61 if err != nil { 62 return nil, nil, err 63 } 64 65 // Defaults 66 if len(c.RunCommand) == 0 { 67 c.RunCommand = []string{"-d", "-i", "-t", "{{.Image}}", "/bin/bash"} 68 } 69 70 // Default Pull if it wasn't set 71 hasPull := false 72 for _, k := range md.Keys { 73 if k == "Pull" { 74 hasPull = true 75 break 76 } 77 } 78 79 if !hasPull { 80 c.Pull = true 81 } 82 83 // Default to the normal Docker type 84 if c.Comm.Type == "" { 85 c.Comm.Type = "docker" 86 } 87 88 var errs *packer.MultiError 89 if es := c.Comm.Prepare(&c.ctx); len(es) > 0 { 90 errs = packer.MultiErrorAppend(errs, es...) 91 } 92 if c.Image == "" { 93 errs = packer.MultiErrorAppend(errs, errImageNotSpecified) 94 } 95 96 if (c.ExportPath != "" && c.Commit) || (c.ExportPath != "" && c.Discard) || (c.Commit && c.Discard) { 97 errs = packer.MultiErrorAppend(errs, errArtifactUseConflict) 98 } 99 100 if c.ExportPath == "" && !c.Commit && !c.Discard { 101 errs = packer.MultiErrorAppend(errs, errArtifactNotUsed) 102 } 103 104 if c.ExportPath != "" { 105 if fi, err := os.Stat(c.ExportPath); err == nil && fi.IsDir() { 106 errs = packer.MultiErrorAppend(errs, errExportPathNotFile) 107 } 108 } 109 110 if errs != nil && len(errs.Errors) > 0 { 111 return nil, nil, errs 112 } 113 114 return c, nil, nil 115 }