func (c *Config) NewClientFromSettingsData() (*Client, error) {
config := Config{}
err := json.Unmarshal(c.Settings, &config)
if err == nil {
return config.NewClient()
}
return nil, err
}
func readFileVars(path string) (map[string]string, error) {
bytes, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
vars := make(map[string]string)
err = jsonutil.Unmarshal(bytes, &vars)
if err != nil {
return nil, err
}
return vars, nil
}
// ParseTemplate takes a byte slice and parses a Template from it, returning
// the template and possibly errors while loading the template. The error
// could potentially be a MultiError, representing multiple errors. Knowing
// and checking for this can be useful, if you wish to format it in a certain
// way.
func ParseTemplate(data []byte) (t *Template, err error) {
var rawTplInterface interface{}
err = jsonutil.Unmarshal(data, &rawTplInterface)
if err != nil {
return
}
// Decode the raw template interface into the actual rawTemplate
// structure, checking for any extranneous keys along the way.
var md mapstructure.Metadata
var rawTpl rawTemplate
decoderConfig := &mapstructure.DecoderConfig{
Metadata: &md,
Result: &rawTpl,
}
decoder, err := mapstructure.NewDecoder(decoderConfig)
if err != nil {
return
}
err = decoder.Decode(rawTplInterface)
if err != nil {
return
}
errors := make([]error, 0)
if len(md.Unused) > 0 {
sort.Strings(md.Unused)
for _, unused := range md.Unused {
errors = append(
errors, fmt.Errorf("Unknown root level key in template: '%s'", unused))
}
}
t = &Template{}
t.Variables = make(map[string]string)
t.Builders = make(map[string]RawBuilderConfig)
t.Hooks = rawTpl.Hooks
t.PostProcessors = make([][]RawPostProcessorConfig, len(rawTpl.PostProcessors))
t.Provisioners = make([]RawProvisionerConfig, len(rawTpl.Provisioners))
// Gather all the variables
for k, v := range rawTpl.Variables {
t.Variables[k] = v
}
// Gather all the builders
for i, v := range rawTpl.Builders {
var raw RawBuilderConfig
if err := mapstructure.Decode(v, &raw); err != nil {
if merr, ok := err.(*mapstructure.Error); ok {
for _, err := range merr.Errors {
errors = append(errors, fmt.Errorf("builder %d: %s", i+1, err))
}
} else {
errors = append(errors, fmt.Errorf("builder %d: %s", i+1, err))
}
continue
}
if raw.Type == "" {
errors = append(errors, fmt.Errorf("builder %d: missing 'type'", i+1))
continue
}
// Attempt to get the name of the builder. If the "name" key
// missing, use the "type" field, which is guaranteed to exist
// at this point.
if raw.Name == "" {
raw.Name = raw.Type
}
// Check if we already have a builder with this name and error if so
if _, ok := t.Builders[raw.Name]; ok {
errors = append(errors, fmt.Errorf("builder with name '%s' already exists", raw.Name))
continue
}
// Now that we have the name, remove it from the config - as the builder
// itself doesn't know about, and it will cause a validation error.
delete(v, "name")
raw.RawConfig = v
t.Builders[raw.Name] = raw
}
// Gather all the post-processors. This is a complicated process since there
// are actually three different formats that the user can use to define
// a post-processor.
for i, rawV := range rawTpl.PostProcessors {
rawPP, err := parsePostProcessor(i, rawV)
if err != nil {
errors = append(errors, err...)
continue
}
t.PostProcessors[i] = make([]RawPostProcessorConfig, len(rawPP))
configs := t.PostProcessors[i]
for j, pp := range rawPP {
config := &configs[j]
if err := mapstructure.Decode(pp, config); err != nil {
if merr, ok := err.(*mapstructure.Error); ok {
for _, err := range merr.Errors {
errors = append(errors, fmt.Errorf("Post-processor #%d.%d: %s", i+1, j+1, err))
}
} else {
errors = append(errors, fmt.Errorf("Post-processor %d.%d: %s", i+1, j+1, err))
}
continue
}
if config.Type == "" {
errors = append(errors, fmt.Errorf("Post-processor %d.%d: missing 'type'", i+1, j+1))
continue
}
// Remove the input keep_input_artifact option
delete(pp, "keep_input_artifact")
config.RawConfig = pp
}
}
// Gather all the provisioners
for i, v := range rawTpl.Provisioners {
raw := &t.Provisioners[i]
if err := mapstructure.Decode(v, raw); err != nil {
if merr, ok := err.(*mapstructure.Error); ok {
for _, err := range merr.Errors {
errors = append(errors, fmt.Errorf("provisioner %d: %s", i+1, err))
}
} else {
errors = append(errors, fmt.Errorf("provisioner %d: %s", i+1, err))
}
continue
}
if raw.Type == "" {
errors = append(errors, fmt.Errorf("provisioner %d: missing 'type'", i+1))
continue
}
// The provisioners not only don't need or want the override settings
// (as they are processed as part of the preparation below), but will
// actively reject them as invalid configuration.
delete(v, "override")
// Verify that the override keys exist...
for name, _ := range raw.Override {
if _, ok := t.Builders[name]; !ok {
errors = append(
errors, fmt.Errorf("provisioner %d: build '%s' not found for override", i+1, name))
}
}
raw.RawConfig = v
}
if len(t.Builders) == 0 {
errors = append(errors, fmt.Errorf("No builders are defined in the template."))
}
// If there were errors, we put it into a MultiError and return
if len(errors) > 0 {
err = &MultiError{errors}
t = nil
return
}
return
}
// ParseTemplate takes a byte slice and parses a Template from it, returning
// the template and possibly errors while loading the template. The error
// could potentially be a MultiError, representing multiple errors. Knowing
// and checking for this can be useful, if you wish to format it in a certain
// way.
//
// The second parameter, vars, are the values for a set of user variables.
func ParseTemplate(data []byte, vars map[string]string) (t *Template, err error) {
var rawTplInterface interface{}
err = jsonutil.Unmarshal(data, &rawTplInterface)
if err != nil {
return
}
// Decode the raw template interface into the actual rawTemplate
// structure, checking for any extranneous keys along the way.
var md mapstructure.Metadata
var rawTpl rawTemplate
decoderConfig := &mapstructure.DecoderConfig{
Metadata: &md,
Result: &rawTpl,
}
decoder, err := mapstructure.NewDecoder(decoderConfig)
if err != nil {
return
}
err = decoder.Decode(rawTplInterface)
if err != nil {
return
}
if rawTpl.MinimumPackerVersion != "" {
// TODO: NOPE! Replace this
Version := "1.0"
vCur, err := version.NewVersion(Version)
if err != nil {
panic(err)
}
vReq, err := version.NewVersion(rawTpl.MinimumPackerVersion)
if err != nil {
return nil, fmt.Errorf(
"'minimum_packer_version' error: %s", err)
}
if vCur.LessThan(vReq) {
return nil, fmt.Errorf(
"Template requires Packer version %s. "+
"Running version is %s.",
vReq, vCur)
}
}
errors := make([]error, 0)
if len(md.Unused) > 0 {
sort.Strings(md.Unused)
for _, unused := range md.Unused {
errors = append(
errors, fmt.Errorf("Unknown root level key in template: '%s'", unused))
}
}
t = &Template{}
t.Description = rawTpl.Description
t.Variables = make(map[string]RawVariable)
t.Builders = make(map[string]RawBuilderConfig)
t.Hooks = rawTpl.Hooks
t.PostProcessors = make([][]RawPostProcessorConfig, len(rawTpl.PostProcessors))
t.Provisioners = make([]RawProvisionerConfig, len(rawTpl.Provisioners))
// Gather all the variables
for k, v := range rawTpl.Variables {
var variable RawVariable
variable.Required = v == nil
// Create a new mapstructure decoder in order to decode the default
// value since this is the only value in the regular template that
// can be weakly typed.
decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
Result: &variable.Default,
WeaklyTypedInput: true,
})
if err != nil {
// This should never happen.
panic(err)
}
err = decoder.Decode(v)
if err != nil {
errors = append(errors,
fmt.Errorf("Error decoding default value for user var '%s': %s", k, err))
continue
}
// Set the value of this variable if we have it
if val, ok := vars[k]; ok {
variable.HasValue = true
variable.Value = val
delete(vars, k)
}
t.Variables[k] = variable
}
// Gather all the builders
for i, v := range rawTpl.Builders {
var raw RawBuilderConfig
if err := mapstructure.Decode(v, &raw); err != nil {
if merr, ok := err.(*mapstructure.Error); ok {
for _, err := range merr.Errors {
errors = append(errors, fmt.Errorf("builder %d: %s", i+1, err))
}
} else {
errors = append(errors, fmt.Errorf("builder %d: %s", i+1, err))
}
continue
}
if raw.Type == "" {
errors = append(errors, fmt.Errorf("builder %d: missing 'type'", i+1))
continue
}
// Attempt to get the name of the builder. If the "name" key
// missing, use the "type" field, which is guaranteed to exist
// at this point.
if raw.Name == "" {
raw.Name = raw.Type
}
// Check if we already have a builder with this name and error if so
if _, ok := t.Builders[raw.Name]; ok {
errors = append(errors, fmt.Errorf("builder with name '%s' already exists", raw.Name))
continue
}
// Now that we have the name, remove it from the config - as the builder
// itself doesn't know about, and it will cause a validation error.
delete(v, "name")
raw.RawConfig = v
t.Builders[raw.Name] = raw
}
// Gather all the post-processors. This is a complicated process since there
// are actually three different formats that the user can use to define
// a post-processor.
for i, rawV := range rawTpl.PostProcessors {
rawPP, err := parsePostProcessor(i, rawV)
if err != nil {
errors = append(errors, err...)
continue
}
configs := make([]RawPostProcessorConfig, 0, len(rawPP))
for j, pp := range rawPP {
var config RawPostProcessorConfig
if err := mapstructure.Decode(pp, &config); err != nil {
if merr, ok := err.(*mapstructure.Error); ok {
for _, err := range merr.Errors {
errors = append(errors,
fmt.Errorf("Post-processor #%d.%d: %s", i+1, j+1, err))
}
} else {
errors = append(errors,
fmt.Errorf("Post-processor %d.%d: %s", i+1, j+1, err))
}
continue
}
if config.Type == "" {
errors = append(errors,
fmt.Errorf("Post-processor %d.%d: missing 'type'", i+1, j+1))
continue
}
// Remove the input keep_input_artifact option
config.TemplateOnlyExcept.Prune(pp)
delete(pp, "keep_input_artifact")
// Verify that the only settings are good
if errs := config.TemplateOnlyExcept.Validate(t.Builders); len(errs) > 0 {
for _, err := range errs {
errors = append(errors,
fmt.Errorf("Post-processor %d.%d: %s", i+1, j+1, err))
}
continue
}
config.RawConfig = pp
// Add it to the list of configs
configs = append(configs, config)
}
t.PostProcessors[i] = configs
}
// Gather all the provisioners
for i, v := range rawTpl.Provisioners {
raw := &t.Provisioners[i]
if err := mapstructure.Decode(v, raw); err != nil {
if merr, ok := err.(*mapstructure.Error); ok {
for _, err := range merr.Errors {
errors = append(errors, fmt.Errorf("provisioner %d: %s", i+1, err))
}
} else {
errors = append(errors, fmt.Errorf("provisioner %d: %s", i+1, err))
}
continue
}
if raw.Type == "" {
errors = append(errors, fmt.Errorf("provisioner %d: missing 'type'", i+1))
continue
}
// Delete the keys that we used
raw.TemplateOnlyExcept.Prune(v)
delete(v, "override")
// Verify that the override keys exist...
for name, _ := range raw.Override {
if _, ok := t.Builders[name]; !ok {
errors = append(
errors, fmt.Errorf("provisioner %d: build '%s' not found for override", i+1, name))
}
}
// Verify that the only settings are good
if errs := raw.TemplateOnlyExcept.Validate(t.Builders); len(errs) > 0 {
for _, err := range errs {
errors = append(errors,
fmt.Errorf("provisioner %d: %s", i+1, err))
}
}
// Setup the pause settings
if raw.RawPauseBefore != "" {
duration, err := time.ParseDuration(raw.RawPauseBefore)
if err != nil {
errors = append(
errors, fmt.Errorf(
"provisioner %d: pause_before invalid: %s",
i+1, err))
}
raw.pauseBefore = duration
}
// Remove the pause_before setting if it is there so that we don't
// get template validation errors later.
delete(v, "pause_before")
raw.RawConfig = v
}
if len(t.Builders) == 0 {
errors = append(errors, fmt.Errorf("No builders are defined in the template."))
}
// Verify that all the variable sets were for real variables.
for k, _ := range vars {
errors = append(errors, fmt.Errorf("Unknown user variables: %s", k))
}
// If there were errors, we put it into a MultiError and return
if len(errors) > 0 {
err = &MultiError{errors}
t = nil
return
}
return
}
