/
types.build.provisioners.go
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/
types.build.provisioners.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package hcl2template
import (
"fmt"
"strconv"
"time"
"github.com/hashicorp/hcl/v2"
"github.com/hashicorp/hcl/v2/gohcl"
packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
hcl2shim "github.com/hashicorp/packer/hcl2template/shim"
"github.com/zclconf/go-cty/cty"
)
// OnlyExcept is a struct that is meant to be embedded that contains the
// logic required for "only" and "except" meta-parameters.
type OnlyExcept struct {
Only []string `json:"only,omitempty"`
Except []string `json:"except,omitempty"`
}
// Skip says whether or not to skip the build with the given name.
func (o *OnlyExcept) Skip(n string) bool {
if len(o.Only) > 0 {
for _, v := range o.Only {
if v == n {
return false
}
}
return true
}
if len(o.Except) > 0 {
for _, v := range o.Except {
if v == n {
return true
}
}
return false
}
return false
}
// Validate validates that the OnlyExcept settings are correct for a thing.
func (o *OnlyExcept) Validate() hcl.Diagnostics {
var diags hcl.Diagnostics
if len(o.Only) > 0 && len(o.Except) > 0 {
diags = diags.Append(&hcl.Diagnostic{
Summary: "only one of 'only' or 'except' may be specified",
Severity: hcl.DiagError,
})
}
return diags
}
// ProvisionerBlock references a detected but unparsed provisioner
type ProvisionerBlock struct {
PType string
PName string
PauseBefore time.Duration
MaxRetries int
Timeout time.Duration
Override map[string]interface{}
OnlyExcept OnlyExcept
HCL2Ref
}
func (p *ProvisionerBlock) String() string {
return fmt.Sprintf(buildProvisionerLabel+"-block %q %q", p.PType, p.PName)
}
func (p *Parser) decodeProvisioner(block *hcl.Block, ectx *hcl.EvalContext) (*ProvisionerBlock, hcl.Diagnostics) {
var b struct {
Name string `hcl:"name,optional"`
PauseBefore string `hcl:"pause_before,optional"`
MaxRetries int `hcl:"max_retries,optional"`
Timeout string `hcl:"timeout,optional"`
Only []string `hcl:"only,optional"`
Except []string `hcl:"except,optional"`
Override cty.Value `hcl:"override,optional"`
Rest hcl.Body `hcl:",remain"`
}
diags := gohcl.DecodeBody(block.Body, ectx, &b)
if diags.HasErrors() {
return nil, diags
}
provisioner := &ProvisionerBlock{
PType: block.Labels[0],
PName: b.Name,
MaxRetries: b.MaxRetries,
OnlyExcept: OnlyExcept{Only: b.Only, Except: b.Except},
HCL2Ref: newHCL2Ref(block, b.Rest),
}
diags = diags.Extend(provisioner.OnlyExcept.Validate())
if diags.HasErrors() {
return nil, diags
}
if !b.Override.IsNull() {
if !b.Override.Type().IsObjectType() {
return nil, append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "provisioner's override block must be an HCL object",
Subject: block.DefRange.Ptr(),
})
}
override := make(map[string]interface{})
for buildName, overrides := range b.Override.AsValueMap() {
buildOverrides := make(map[string]interface{})
if !overrides.Type().IsObjectType() {
return nil, append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: fmt.Sprintf(
"provisioner's override.'%s' block must be an HCL object",
buildName),
Subject: block.DefRange.Ptr(),
})
}
for option, value := range overrides.AsValueMap() {
buildOverrides[option] = hcl2shim.ConfigValueFromHCL2(value)
}
override[buildName] = buildOverrides
}
provisioner.Override = override
}
if b.PauseBefore != "" {
pauseBefore, err := time.ParseDuration(b.PauseBefore)
if err != nil {
return nil, append(diags, &hcl.Diagnostic{
Summary: "Failed to parse pause_before duration",
Severity: hcl.DiagError,
Detail: err.Error(),
Subject: &block.DefRange,
})
}
provisioner.PauseBefore = pauseBefore
}
if b.Timeout != "" {
timeout, err := time.ParseDuration(b.Timeout)
if err != nil {
return nil, append(diags, &hcl.Diagnostic{
Summary: "Failed to parse timeout duration",
Severity: hcl.DiagError,
Detail: err.Error(),
Subject: &block.DefRange,
})
}
provisioner.Timeout = timeout
}
return provisioner, diags
}
func (cfg *PackerConfig) startProvisioner(source SourceUseBlock, pb *ProvisionerBlock, ectx *hcl.EvalContext) (packersdk.Provisioner, hcl.Diagnostics) {
var diags hcl.Diagnostics
provisioner, err := cfg.parser.PluginConfig.Provisioners.Start(pb.PType)
if err != nil {
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: fmt.Sprintf("failed loading %s", pb.PType),
Subject: pb.HCL2Ref.LabelsRanges[0].Ptr(),
Detail: err.Error(),
})
return nil, diags
}
builderVars := source.builderVariables()
builderVars["packer_core_version"] = cfg.CorePackerVersionString
builderVars["packer_debug"] = strconv.FormatBool(cfg.debug)
builderVars["packer_force"] = strconv.FormatBool(cfg.force)
builderVars["packer_on_error"] = cfg.onError
hclProvisioner := &HCL2Provisioner{
Provisioner: provisioner,
provisionerBlock: pb,
evalContext: ectx,
builderVariables: builderVars,
}
if pb.Override != nil {
if override, ok := pb.Override[source.name()]; ok {
hclProvisioner.override = override.(map[string]interface{})
}
}
err = hclProvisioner.HCL2Prepare(nil)
if err != nil {
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: fmt.Sprintf("Failed preparing %s", pb),
Detail: err.Error(),
Subject: pb.HCL2Ref.DefRange.Ptr(),
})
return nil, diags
}
return hclProvisioner, diags
}