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Make max_retries a string to allow variable interpolation (#9673)

This commit is contained in:
Sylvia Moss 2020-08-05 17:41:20 +02:00 committed by GitHub
parent 6b8d086e94
commit 9181a435aa
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GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 179 additions and 24 deletions
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3
hcl2template/parser.go
View File

@ -61,7 +61,6 @@ const (
// build; sources(builders)/provisioners/posts-processors will not be started
// and their contents wont be verified; Most syntax errors will cause an error.
func (p *Parser) Parse(filename string, varFiles []string, argVars map[string]string) (*PackerConfig, hcl.Diagnostics) {
var files []*hcl.File
var diags hcl.Diagnostics
@ -225,7 +224,7 @@ func (p *Parser) decodeConfig(f *hcl.File, cfg *PackerConfig) hcl.Diagnostics {
cfg.Sources[ref] = source
case buildLabel:
build, moreDiags := p.decodeBuildConfig(block)
build, moreDiags := p.decodeBuildConfig(block, cfg)
diags = append(diags, moreDiags...)
if moreDiags.HasErrors() {
continue

21
hcl2template/testdata/variables/provisioner_variable_decoding.pkr.hcl vendored Normal file
View File

@ -0,0 +1,21 @@
variables {
max_retries = "1"
max_retries_int = 1
}
source "null" "null-builder" {
communicator = "none"
}
build {
sources = [
"source.null.null-builder",
]
provisioner "shell" {
max_retries = var.max_retries_int
}
provisioner "shell" {
max_retries = var.max_retries
}
}

4
hcl2template/types.build.go
View File

@ -70,7 +70,7 @@ type Builds []*BuildBlock
// decodeBuildConfig is called when a 'build' block has been detected. It will
// load the references to the contents of the build block.
func (p *Parser) decodeBuildConfig(block *hcl.Block) (*BuildBlock, hcl.Diagnostics) {
func (p *Parser) decodeBuildConfig(block *hcl.Block, cfg *PackerConfig) (*BuildBlock, hcl.Diagnostics) {
build := &BuildBlock{}
var b struct {
@ -123,7 +123,7 @@ func (p *Parser) decodeBuildConfig(block *hcl.Block) (*BuildBlock, hcl.Diagnosti
}
build.Sources = append(build.Sources, ref)
case buildProvisionerLabel:
p, moreDiags := p.decodeProvisioner(block)
p, moreDiags := p.decodeProvisioner(block, cfg)
diags = append(diags, moreDiags...)
if moreDiags.HasErrors() {
continue

4
hcl2template/types.build.provisioners.go
View File

@ -70,7 +70,7 @@ func (p *ProvisionerBlock) String() string {
return fmt.Sprintf(buildProvisionerLabel+"-block %q %q", p.PType, p.PName)
}
func (p *Parser) decodeProvisioner(block *hcl.Block) (*ProvisionerBlock, hcl.Diagnostics) {
func (p *Parser) decodeProvisioner(block *hcl.Block, cfg *PackerConfig) (*ProvisionerBlock, hcl.Diagnostics) {
var b struct {
Name string `hcl:"name,optional"`
PauseBefore string `hcl:"pause_before,optional"`
@ -80,7 +80,7 @@ func (p *Parser) decodeProvisioner(block *hcl.Block) (*ProvisionerBlock, hcl.Dia
Except []string `hcl:"except,optional"`
Rest hcl.Body `hcl:",remain"`
}
diags := gohcl.DecodeBody(block.Body, nil, &b)
diags := gohcl.DecodeBody(block.Body, cfg.EvalContext(nil), &b)
if diags.HasErrors() {
return nil, diags
}

92
hcl2template/types.variables_test.go
View File

@ -6,12 +6,12 @@ import (
"testing"
"github.com/google/go-cmp/cmp"
"github.com/zclconf/go-cty/cty"
"github.com/zclconf/go-cty/cty/convert"
"github.com/hashicorp/hcl/v2"
"github.com/hashicorp/packer/builder/null"
. "github.com/hashicorp/packer/hcl2template/internal"
"github.com/hashicorp/packer/packer"
"github.com/zclconf/go-cty/cty"
"github.com/zclconf/go-cty/cty/convert"
)
func TestParse_variables(t *testing.T) {
@ -271,6 +271,92 @@ func TestParse_variables(t *testing.T) {
[]packer.Build{},
false,
},
{"provisioner variable decoding",
defaultParser,
parseTestArgs{"testdata/variables/provisioner_variable_decoding.pkr.hcl", nil, nil},
&PackerConfig{
Basedir: filepath.Join("testdata", "variables"),
InputVariables: Variables{
"max_retries": &Variable{
Name: "max_retries",
DefaultValue: cty.StringVal("1"),
Type: cty.String,
},
"max_retries_int": &Variable{
Name: "max_retries_int",
DefaultValue: cty.NumberIntVal(1),
Type: cty.Number,
},
},
Sources: map[SourceRef]SourceBlock{
SourceRef{Type: "null", Name: "null-builder"}: SourceBlock{
Name: "null-builder",
Type: "null",
},
},
Builds: Builds{
&BuildBlock{
Sources: []SourceRef{
{Type: "null", Name: "null-builder"},
},
ProvisionerBlocks: []*ProvisionerBlock{
{
PType: "shell",
MaxRetries: 1,
},
{
PType: "shell",
MaxRetries: 1,
},
},
},
},
},
false, false,
[]packer.Build{&packer.CoreBuild{
Type: "null.null-builder",
Prepared: true,
Builder: &null.Builder{},
Provisioners: []packer.CoreBuildProvisioner{
{
PType: "shell",
Provisioner: &packer.RetriedProvisioner{
MaxRetries: 1,
Provisioner: &HCL2Provisioner{
Provisioner: &MockProvisioner{
Config: MockConfig{
NestedMockConfig: NestedMockConfig{
Tags: []MockTag{},
},
NestedSlice: []NestedMockConfig{},
},
},
},
},
},
{
PType: "shell",
Provisioner: &packer.RetriedProvisioner{
MaxRetries: 1,
Provisioner: &HCL2Provisioner{
Provisioner: &MockProvisioner{
Config: MockConfig{
NestedMockConfig: NestedMockConfig{
Tags: []MockTag{},
},
NestedSlice: []NestedMockConfig{},
},
},
},
},
},
},
PostProcessors: [][]packer.CoreBuildPostProcessor{},
},
},
false,
},
}
testParse(t, tests)
}

16
packer/core.go
View File

@ -6,6 +6,7 @@ import (
"log"
"regexp"
"sort"
"strconv"
"strings"
ttmp "text/template"
@ -191,9 +192,20 @@ func (c *Core) generateCoreBuildProvisioner(rawP *template.Provisioner, rawName
Provisioner: provisioner,
}
}
if rawP.MaxRetries != 0 {
maxRetries := 0
if rawP.MaxRetries != "" {
renderedMaxRetries, err := interpolate.Render(rawP.MaxRetries, c.Context())
if err != nil {
return cbp, fmt.Errorf("failed to interpolate `max_retries`: %s", err.Error())
}
maxRetries, err = strconv.Atoi(renderedMaxRetries)
if err != nil {
return cbp, fmt.Errorf("`max_retries` must be a valid integer: %s", err.Error())
}
}
if maxRetries != 0 {
provisioner = &RetriedProvisioner{
MaxRetries: rawP.MaxRetries,
MaxRetries: maxRetries,
Provisioner: provisioner,
}
}

21
packer/core_test.go
View File

@ -799,7 +799,13 @@ func TestCoreBuild_provRetry(t *testing.T) {
config := TestCoreConfig(t)
testCoreTemplate(t, config, fixtureDir("build-prov-retry.json"))
b := TestBuilder(t, config, "test")
p := TestProvisioner(t, config, "test")
pString := new(MockProvisioner)
pInt := new(MockProvisioner)
config.Components.ProvisionerStore = MapOfProvisioner{
"test-string": func() (Provisioner, error) { return pString, nil },
// backwards compatibility
"test-integer": func() (Provisioner, error) { return pInt, nil },
}
core := TestCore(t, config)
b.ArtifactId = "hello"
@ -814,7 +820,10 @@ func TestCoreBuild_provRetry(t *testing.T) {
}
ui := testUi()
p.ProvFunc = func(ctx context.Context) error {
pInt.ProvFunc = func(ctx context.Context) error {
return errors.New("failed")
}
pString.ProvFunc = func(ctx context.Context) error {
return errors.New("failed")
}
@ -829,7 +838,11 @@ func TestCoreBuild_provRetry(t *testing.T) {
if artifact[0].Id() != b.ArtifactId {
t.Fatalf("bad: %s", artifact[0].Id())
}
if !p.ProvRetried {
t.Fatal("provisioner should retry")
if !pString.ProvRetried {
t.Fatal("provisioner should retry for max_retries string value")
}
// backwards compatibility
if !pInt.ProvRetried {
t.Fatal("provisioner should retry for max_retries integer value")
}
}

14
packer/test-fixtures/build-prov-retry.json
View File

@ -3,8 +3,14 @@
"type": "test"
}],
"provisioners": [{
"type": "test",
"max_retries": 1
}]
"provisioners": [
{
"type": "test-integer",
"max_retries": 1
},
{
"type": "test-string",
"max_retries": "1"
}
]
}

20
template/parse.go
View File

@ -59,7 +59,7 @@ func (r *rawTemplate) MarshalJSON() ([]byte, error) {
func (r *rawTemplate) decodeProvisioner(raw interface{}) (Provisioner, error) {
var p Provisioner
if err := r.decoder(&p, nil).Decode(raw); err != nil {
if err := r.weakDecoder(&p, nil).Decode(raw); err != nil {
return p, fmt.Errorf("Error decoding provisioner: %s", err)
}
@ -287,6 +287,24 @@ func (r *rawTemplate) decoder(
return d
}
func (r *rawTemplate) weakDecoder(
result interface{},
md *mapstructure.Metadata) *mapstructure.Decoder {
d, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
WeaklyTypedInput: true,
DecodeHook: mapstructure.StringToTimeDurationHookFunc(),
Metadata: md,
Result: result,
})
if err != nil {
// This really shouldn't happen since we have firm control over
// all the arguments and they're all unit tested. So we use a
// panic here to note this would definitely be a bug.
panic(err)
}
return d
}
func (r *rawTemplate) parsePostProcessor(
i int, raw interface{}) ([]map[string]interface{}, error) {
switch v := raw.(type) {

2
template/parse_test.go
View File

@ -112,7 +112,7 @@ func TestParse(t *testing.T) {
Provisioners: []*Provisioner{
{
Type: "something",
MaxRetries: 5,
MaxRetries: "5",
},
},
},

2
template/template.go
View File

@ -141,7 +141,7 @@ type Provisioner struct {
Config map[string]interface{} `json:"config,omitempty"`
Override map[string]interface{} `json:"override,omitempty"`
PauseBefore time.Duration `mapstructure:"pause_before" json:"pause_before,omitempty"`
MaxRetries int `mapstructure:"max_retries" json:"max_retries,omitempty"`
MaxRetries string `mapstructure:"max_retries" json:"max_retries,omitempty"`
Timeout time.Duration `mapstructure:"timeout" json:"timeout,omitempty"`
}

4
template/template.hcl2spec.go
View File

@ -15,7 +15,7 @@ type FlatProvisioner struct {
Config map[string]interface{} `json:"config,omitempty" cty:"config" hcl:"config"`
Override map[string]interface{} `json:"override,omitempty" cty:"override" hcl:"override"`
PauseBefore *string `mapstructure:"pause_before" json:"pause_before,omitempty" cty:"pause_before" hcl:"pause_before"`
MaxRetries *int `mapstructure:"max_retries" json:"max_retries,omitempty" cty:"max_retries" hcl:"max_retries"`
MaxRetries *string `mapstructure:"max_retries" json:"max_retries,omitempty" cty:"max_retries" hcl:"max_retries"`
Timeout *string `mapstructure:"timeout" json:"timeout,omitempty" cty:"timeout" hcl:"timeout"`
}
@ -37,7 +37,7 @@ func (*FlatProvisioner) HCL2Spec() map[string]hcldec.Spec {
"config": &hcldec.AttrSpec{Name: "config", Type: cty.Map(cty.String), Required: false},
"override": &hcldec.AttrSpec{Name: "override", Type: cty.Map(cty.String), Required: false},
"pause_before": &hcldec.AttrSpec{Name: "pause_before", Type: cty.String, Required: false},
"max_retries": &hcldec.AttrSpec{Name: "max_retries", Type: cty.Number, Required: false},
"max_retries": &hcldec.AttrSpec{Name: "max_retries", Type: cty.String, Required: false},
"timeout": &hcldec.AttrSpec{Name: "timeout", Type: cty.String, Required: false},
}
return s