github.com/rahart/packer@v0.12.2-0.20161229105310-282bb6ad370f/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  	Author     string
    36  	Changes    []string
    37  	Message    string
    38  
    39  	// This is used to login to dockerhub to pull a private base container. For
    40  	// pushing to dockerhub, see the docker post-processors
    41  	Login           bool
    42  	LoginEmail      string `mapstructure:"login_email"`
    43  	LoginPassword   string `mapstructure:"login_password"`
    44  	LoginServer     string `mapstructure:"login_server"`
    45  	LoginUsername   string `mapstructure:"login_username"`
    46  	EcrLogin        bool   `mapstructure:"ecr_login"`
    47  	AwsAccessConfig `mapstructure:",squash"`
    48  
    49  	ctx interpolate.Context
    50  }
    51  
    52  func NewConfig(raws ...interface{}) (*Config, []string, error) {
    53  	c := new(Config)
    54  
    55  	var md mapstructure.Metadata
    56  	err := config.Decode(c, &config.DecodeOpts{
    57  		Metadata:           &md,
    58  		Interpolate:        true,
    59  		InterpolateContext: &c.ctx,
    60  		InterpolateFilter: &interpolate.RenderFilter{
    61  			Exclude: []string{
    62  				"run_command",
    63  			},
    64  		},
    65  	}, raws...)
    66  	if err != nil {
    67  		return nil, nil, err
    68  	}
    69  
    70  	// Defaults
    71  	if len(c.RunCommand) == 0 {
    72  		c.RunCommand = []string{"-d", "-i", "-t", "{{.Image}}", "/bin/bash"}
    73  	}
    74  
    75  	// Default Pull if it wasn't set
    76  	hasPull := false
    77  	for _, k := range md.Keys {
    78  		if k == "Pull" {
    79  			hasPull = true
    80  			break
    81  		}
    82  	}
    83  
    84  	if !hasPull {
    85  		c.Pull = true
    86  	}
    87  
    88  	// Default to the normal Docker type
    89  	if c.Comm.Type == "" {
    90  		c.Comm.Type = "docker"
    91  	}
    92  
    93  	var errs *packer.MultiError
    94  	if es := c.Comm.Prepare(&c.ctx); len(es) > 0 {
    95  		errs = packer.MultiErrorAppend(errs, es...)
    96  	}
    97  	if c.Image == "" {
    98  		errs = packer.MultiErrorAppend(errs, errImageNotSpecified)
    99  	}
   100  
   101  	if (c.ExportPath != "" && c.Commit) || (c.ExportPath != "" && c.Discard) || (c.Commit && c.Discard) {
   102  		errs = packer.MultiErrorAppend(errs, errArtifactUseConflict)
   103  	}
   104  
   105  	if c.ExportPath == "" && !c.Commit && !c.Discard {
   106  		errs = packer.MultiErrorAppend(errs, errArtifactNotUsed)
   107  	}
   108  
   109  	if c.ExportPath != "" {
   110  		if fi, err := os.Stat(c.ExportPath); err == nil && fi.IsDir() {
   111  			errs = packer.MultiErrorAppend(errs, errExportPathNotFile)
   112  		}
   113  	}
   114  
   115  	if c.EcrLogin && c.LoginServer == "" {
   116  		errs = packer.MultiErrorAppend(errs, fmt.Errorf("ECR login requires login server to be provided."))
   117  	}
   118  
   119  	if errs != nil && len(errs.Errors) > 0 {
   120  		return nil, nil, errs
   121  	}
   122  
   123  	return c, nil, nil
   124  }