github.com/mmcquillan/packer@v1.1.1-0.20171009221028-c85cf0483a5d/builder/docker/config.go (about)

     1  package docker
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  
     7  	"github.com/hashicorp/packer/common"
     8  	"github.com/hashicorp/packer/helper/communicator"
     9  	"github.com/hashicorp/packer/helper/config"
    10  	"github.com/hashicorp/packer/packer"
    11  	"github.com/hashicorp/packer/template/interpolate"
    12  	"github.com/mitchellh/mapstructure"
    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  	Author       string
    27  	Changes      []string
    28  	Commit       bool
    29  	ContainerDir string `mapstructure:"container_dir"`
    30  	Discard      bool
    31  	ExecUser     string `mapstructure:"exec_user"`
    32  	ExportPath   string `mapstructure:"export_path"`
    33  	Image        string
    34  	Message      string
    35  	Privileged   bool `mapstructure:"privileged"`
    36  	Pty          bool
    37  	Pull         bool
    38  	RunCommand   []string `mapstructure:"run_command"`
    39  	Volumes      map[string]string
    40  
    41  	// This is used to login to dockerhub to pull a private base container. For
    42  	// pushing to dockerhub, see the docker post-processors
    43  	Login           bool
    44  	LoginEmail      string `mapstructure:"login_email"`
    45  	LoginPassword   string `mapstructure:"login_password"`
    46  	LoginServer     string `mapstructure:"login_server"`
    47  	LoginUsername   string `mapstructure:"login_username"`
    48  	EcrLogin        bool   `mapstructure:"ecr_login"`
    49  	AwsAccessConfig `mapstructure:",squash"`
    50  
    51  	ctx interpolate.Context
    52  }
    53  
    54  func NewConfig(raws ...interface{}) (*Config, []string, error) {
    55  	c := new(Config)
    56  
    57  	var md mapstructure.Metadata
    58  	err := config.Decode(c, &config.DecodeOpts{
    59  		Metadata:           &md,
    60  		Interpolate:        true,
    61  		InterpolateContext: &c.ctx,
    62  		InterpolateFilter: &interpolate.RenderFilter{
    63  			Exclude: []string{
    64  				"run_command",
    65  			},
    66  		},
    67  	}, raws...)
    68  	if err != nil {
    69  		return nil, nil, err
    70  	}
    71  
    72  	// Defaults
    73  	if len(c.RunCommand) == 0 {
    74  		c.RunCommand = []string{"-d", "-i", "-t", "{{.Image}}", "/bin/bash"}
    75  	}
    76  
    77  	// Default Pull if it wasn't set
    78  	hasPull := false
    79  	for _, k := range md.Keys {
    80  		if k == "Pull" {
    81  			hasPull = true
    82  			break
    83  		}
    84  	}
    85  
    86  	if !hasPull {
    87  		c.Pull = true
    88  	}
    89  
    90  	// Default to the normal Docker type
    91  	if c.Comm.Type == "" {
    92  		c.Comm.Type = "docker"
    93  	}
    94  
    95  	var errs *packer.MultiError
    96  	if es := c.Comm.Prepare(&c.ctx); len(es) > 0 {
    97  		errs = packer.MultiErrorAppend(errs, es...)
    98  	}
    99  	if c.Image == "" {
   100  		errs = packer.MultiErrorAppend(errs, errImageNotSpecified)
   101  	}
   102  
   103  	if (c.ExportPath != "" && c.Commit) || (c.ExportPath != "" && c.Discard) || (c.Commit && c.Discard) {
   104  		errs = packer.MultiErrorAppend(errs, errArtifactUseConflict)
   105  	}
   106  
   107  	if c.ExportPath == "" && !c.Commit && !c.Discard {
   108  		errs = packer.MultiErrorAppend(errs, errArtifactNotUsed)
   109  	}
   110  
   111  	if c.ExportPath != "" {
   112  		if fi, err := os.Stat(c.ExportPath); err == nil && fi.IsDir() {
   113  			errs = packer.MultiErrorAppend(errs, errExportPathNotFile)
   114  		}
   115  	}
   116  
   117  	if c.ContainerDir == "" {
   118  		c.ContainerDir = "/packer-files"
   119  	}
   120  
   121  	if c.EcrLogin && c.LoginServer == "" {
   122  		errs = packer.MultiErrorAppend(errs, fmt.Errorf("ECR login requires login server to be provided."))
   123  	}
   124  
   125  	if errs != nil && len(errs.Errors) > 0 {
   126  		return nil, nil, errs
   127  	}
   128  
   129  	return c, nil, nil
   130  }