105 lines
2.3 KiB
Go
105 lines
2.3 KiB
Go
package validate
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import (
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"flag"
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"fmt"
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"github.com/mitchellh/packer/packer"
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"io/ioutil"
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"log"
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"strings"
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)
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type Command byte
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func (Command) Help() string {
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return strings.TrimSpace(helpString)
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}
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func (c Command) Run(env packer.Environment, args []string) int {
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var cfgSyntaxOnly bool
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cmdFlags := flag.NewFlagSet("validate", flag.ContinueOnError)
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cmdFlags.Usage = func() { env.Ui().Say(c.Help()) }
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cmdFlags.BoolVar(&cfgSyntaxOnly, "syntax-only", false, "check syntax only")
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if err := cmdFlags.Parse(args); err != nil {
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return 1
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}
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args = cmdFlags.Args()
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if len(args) != 1 {
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cmdFlags.Usage()
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return 1
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}
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// Read the file into a byte array so that we can parse the template
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log.Printf("Reading template: %s", args[0])
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tplData, err := ioutil.ReadFile(args[0])
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if err != nil {
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env.Ui().Error(fmt.Sprintf("Failed to read template file: %s", err))
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return 1
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}
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// Parse the template into a machine-usable format
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log.Println("Parsing template...")
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tpl, err := packer.ParseTemplate(tplData)
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if err != nil {
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env.Ui().Error(fmt.Sprintf("Failed to parse template: %s", err))
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return 1
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}
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if cfgSyntaxOnly {
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env.Ui().Say("Syntax-only check passed. Everything looks okay.")
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return 0
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}
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errs := make([]error, 0)
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// The component finder for our builds
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components := &packer.ComponentFinder{
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Builder: env.Builder,
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Hook: env.Hook,
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Provisioner: env.Provisioner,
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}
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// Otherwise, get all the builds
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buildNames := tpl.BuildNames()
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builds := make([]packer.Build, 0, len(buildNames))
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for _, buildName := range buildNames {
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build, err := tpl.Build(buildName, components)
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if err != nil {
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errs = append(errs, fmt.Errorf("Build '%s': %s", buildName, err))
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continue
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}
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builds = append(builds, build)
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}
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// Check the configuration of all builds
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for _, b := range builds {
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err := b.Prepare()
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if err != nil {
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errs = append(errs, fmt.Errorf("Errors validating build '%s'. %s", b.Name(), err))
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}
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}
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if len(errs) > 0 {
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env.Ui().Error("Template validation failed. Errors are shown below.\n")
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for i, err := range errs {
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env.Ui().Error(err.Error())
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if (i+1) < len(errs) {
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env.Ui().Error("")
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}
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}
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return 1
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}
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env.Ui().Say("Template validated successfully.")
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return 0
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}
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func (Command) Synopsis() string {
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return "check that a template is valid"
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}
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