Method GenerateCoreBuildProvisionerFromHCLBody

packer/core.go:327–396

GenerateCoreBuildProvisionerFromHCLBody converts a parsed enforced provisioner body into a legacy JSON core build provisioner, using the same runtime behavior as normal JSON templates.

(
	provisionerType string,
	configBody hcl.Body,
	override map[string]interface{},
	pauseBefore time.Duration,
	maxRetries int,
	timeout time.Duration,
	rawName string,
)

// GenerateCoreBuildProvisionerFromHCLBody converts a parsed enforced provisioner body into
// a legacy JSON core build provisioner, using the same runtime behavior as normal JSON templates.
func (c *Core) GenerateCoreBuildProvisionerFromHCLBody(
	provisionerType string,
	configBody hcl.Body,
	override map[string]interface{},
	pauseBefore time.Duration,
	maxRetries int,
	timeout time.Duration,
	rawName string,
) (CoreBuildProvisioner, hcl.Diagnostics) {
	var diags hcl.Diagnostics

	if !c.components.PluginConfig.Provisioners.Has(provisionerType) {
		return CoreBuildProvisioner{}, hcl.Diagnostics{&hcl.Diagnostic{
			Severity: hcl.DiagError,
			Summary:  fmt.Sprintf("Failed to start enforced provisioner %q", provisionerType),
			Detail:   fmt.Sprintf("The provisioner plugin %q could not be loaded.", provisionerType),
		}}
	}

	provisioner, err := c.components.PluginConfig.Provisioners.Start(provisionerType)
	if err != nil {
		return CoreBuildProvisioner{}, hcl.Diagnostics{&hcl.Diagnostic{
			Severity: hcl.DiagError,
			Summary:  fmt.Sprintf("Failed to start enforced provisioner %q", provisionerType),
			Detail:   fmt.Sprintf("The provisioner plugin could not be loaded: %s", err.Error()),
		}}
	}
	if provisioner == nil {
		return CoreBuildProvisioner{}, hcl.Diagnostics{&hcl.Diagnostic{
			Severity: hcl.DiagError,
			Summary:  fmt.Sprintf("Failed to start enforced provisioner %q", provisionerType),
			Detail:   "The provisioner failed to start and returned no instance.",
		}}
	}

	flatProvisionerCfg, moreDiags := hcldec.Decode(configBody, provisioner.ConfigSpec(), &hcl.EvalContext{Variables: map[string]cty.Value{}})
	diags = append(diags, moreDiags...)
	if diags.HasErrors() {
		return CoreBuildProvisioner{}, diags
	}

	flatProvisionerCfg = hcl2shim.WriteUnknownPlaceholderValues(flatProvisionerCfg)
	decodedConfig := hcl2shim.ConfigValueFromHCL2(flatProvisionerCfg)
	configMap, _ := decodedConfig.(map[string]interface{})
	if configMap == nil {
		configMap = make(map[string]interface{})
	}

	rawProvisioner := &template.Provisioner{
		Type:        provisionerType,
		Config:      configMap,
		Override:    override,
		PauseBefore: pauseBefore,
		Timeout:     timeout,
	}
	if maxRetries > 0 {
		rawProvisioner.MaxRetries = strconv.Itoa(maxRetries)
	}