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|
package command
import (
"fmt"
"log"
"strings"
"github.com/mitchellh/packer/packer"
"github.com/mitchellh/packer/template"
)
type ValidateCommand struct {
Meta
}
func (c *ValidateCommand) Run(args []string) int {
var cfgSyntaxOnly bool
flags := c.Meta.FlagSet("validate", FlagSetBuildFilter|FlagSetVars)
flags.Usage = func() { c.Ui.Say(c.Help()) }
flags.BoolVar(&cfgSyntaxOnly, "syntax-only", false, "check syntax only")
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
}
// If we're only checking syntax, then we're done already
if cfgSyntaxOnly {
c.Ui.Say("Syntax-only check passed. Everything looks okay.")
return 0
}
// Get the core
core, err := c.Meta.Core(tpl)
if err != nil {
c.Ui.Error(err.Error())
return 1
}
errs := make([]error, 0)
warnings := make(map[string][]string)
// Get the builds we care about
buildNames := c.Meta.BuildNames(core)
builds := make([]packer.Build, 0, len(buildNames))
for _, n := range buildNames {
b, err := core.Build(n)
if err != nil {
c.Ui.Error(fmt.Sprintf(
"Failed to initialize build '%s': %s",
n, err))
return 1
}
builds = append(builds, b)
}
// Check the configuration of all builds
for _, b := range builds {
log.Printf("Preparing build: %s", b.Name())
warns, err := b.Prepare()
if len(warns) > 0 {
warnings[b.Name()] = warns
}
if err != nil {
errs = append(errs, fmt.Errorf("Errors validating build '%s'. %s", b.Name(), err))
}
}
if len(errs) > 0 {
c.Ui.Error("Template validation failed. Errors are shown below.\n")
for i, err := range errs {
c.Ui.Error(err.Error())
if (i + 1) < len(errs) {
c.Ui.Error("")
}
}
return 1
}
if len(warnings) > 0 {
c.Ui.Say("Template validation succeeded, but there were some warnings.")
c.Ui.Say("These are ONLY WARNINGS, and Packer will attempt to build the")
c.Ui.Say("template despite them, but they should be paid attention to.\n")
for build, warns := range warnings {
c.Ui.Say(fmt.Sprintf("Warnings for build '%s':\n", build))
for _, warning := range warns {
c.Ui.Say(fmt.Sprintf("* %s", warning))
}
}
return 0
}
c.Ui.Say("Template validated successfully.")
return 0
}
func (*ValidateCommand) Help() string {
helpText := `
Usage: packer validate [options] TEMPLATE
Checks the template is valid by parsing the template and also
checking the configuration with the various builders, provisioners, etc.
If it is not valid, the errors will be shown and the command will exit
with a non-zero exit status. If it is valid, it will exit with a zero
exit status.
Options:
-syntax-only Only check syntax. Do not verify config of the template.
-except=foo,bar,baz Validate all builds other than these
-only=foo,bar,baz Validate only these builds
-var 'key=value' Variable for templates, can be used multiple times.
-var-file=path JSON file containing user variables.
`
return strings.TrimSpace(helpText)
}
func (*ValidateCommand) Synopsis() string {
return "check that a template is valid"
}
|
