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|
package command
import (
"fmt"
"sort"
"strings"
"github.com/hashicorp/packer/template"
"github.com/posener/complete"
)
type InspectCommand struct {
Meta
}
func (c *InspectCommand) Run(args []string) int {
flags := c.Meta.FlagSet("inspect", FlagSetNone)
flags.Usage = func() { c.Ui.Say(c.Help()) }
if err := flags.Parse(args); err != nil {
return 1
}
args = flags.Args()
if len(args) != 1 {
flags.Usage()
return 1
}
// Parse the template
tpl, err := template.ParseFile(args[0])
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to parse template: %s", err))
return 1
}
// Convenience...
ui := c.Ui
// Description
if tpl.Description != "" {
ui.Say("Description:\n")
ui.Say(tpl.Description + "\n")
}
// Variables
if len(tpl.Variables) == 0 {
ui.Say("Variables:\n")
ui.Say(" <No variables>")
} else {
requiredHeader := false
for k, v := range tpl.Variables {
for _, sensitive := range tpl.SensitiveVariables {
if ok := strings.Compare(sensitive.Default, v.Default); ok == 0 {
v.Default = "<sensitive>"
}
}
if v.Required {
if !requiredHeader {
requiredHeader = true
ui.Say("Required variables:\n")
}
ui.Machine("template-variable", k, v.Default, "1")
ui.Say(" " + k)
}
}
if requiredHeader {
ui.Say("")
}
ui.Say("Optional variables and their defaults:\n")
keys := make([]string, 0, len(tpl.Variables))
max := 0
for k := range tpl.Variables {
keys = append(keys, k)
if len(k) > max {
max = len(k)
}
}
sort.Strings(keys)
for _, k := range keys {
v := tpl.Variables[k]
if v.Required {
continue
}
for _, sensitive := range tpl.SensitiveVariables {
if ok := strings.Compare(sensitive.Default, v.Default); ok == 0 {
v.Default = "<sensitive>"
}
}
padding := strings.Repeat(" ", max-len(k))
output := fmt.Sprintf(" %s%s = %s", k, padding, v.Default)
ui.Machine("template-variable", k, v.Default, "0")
ui.Say(output)
}
}
ui.Say("")
// Builders
ui.Say("Builders:\n")
if len(tpl.Builders) == 0 {
ui.Say(" <No builders>")
} else {
keys := make([]string, 0, len(tpl.Builders))
max := 0
for k := range tpl.Builders {
keys = append(keys, k)
if len(k) > max {
max = len(k)
}
}
sort.Strings(keys)
for _, k := range keys {
v := tpl.Builders[k]
padding := strings.Repeat(" ", max-len(k))
output := fmt.Sprintf(" %s%s", k, padding)
if v.Name != v.Type {
output = fmt.Sprintf("%s (%s)", output, v.Type)
}
ui.Machine("template-builder", k, v.Type)
ui.Say(output)
}
}
ui.Say("")
// Provisioners
ui.Say("Provisioners:\n")
if len(tpl.Provisioners) == 0 {
ui.Say(" <No provisioners>")
} else {
for _, v := range tpl.Provisioners {
ui.Machine("template-provisioner", v.Type)
ui.Say(fmt.Sprintf(" %s", v.Type))
}
}
ui.Say("\nNote: If your build names contain user variables or template\n" +
"functions such as 'timestamp', these are processed at build time,\n" +
"and therefore only show in their raw form here.")
return 0
}
func (*InspectCommand) Help() string {
helpText := `
Usage: packer inspect TEMPLATE
Inspects a template, parsing and outputting the components a template
defines. This does not validate the contents of a template (other than
basic syntax by necessity).
Options:
-machine-readable Machine-readable output
`
return strings.TrimSpace(helpText)
}
func (c *InspectCommand) Synopsis() string {
return "see components of a template"
}
func (c *InspectCommand) AutocompleteArgs() complete.Predictor {
return complete.PredictNothing
}
func (c *InspectCommand) AutocompleteFlags() complete.Flags {
return complete.Flags{
"-machine-readable": complete.PredictNothing,
}
}
|
