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generate.go
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generate.go
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package cmd
import (
"errors"
"fmt"
"os"
"path"
"github.com/Azure/dcos-engine/pkg/acsengine"
"github.com/Azure/dcos-engine/pkg/acsengine/transform"
"github.com/Azure/dcos-engine/pkg/api"
"github.com/Azure/dcos-engine/pkg/i18n"
"github.com/leonelquinteros/gotext"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
const (
generateName = "generate"
generateShortDescription = "Generate an Azure Resource Manager template"
generateLongDescription = "Generates an Azure Resource Manager template, parameters file and other assets for a cluster"
)
type generateCmd struct {
apimodelPath string
outputDirectory string // can be auto-determined from clusterDefinition
classicMode bool
noPrettyPrint bool
parametersOnly bool
set []string
// derived
containerService *api.ContainerService
apiVersion string
locale *gotext.Locale
}
func newGenerateCmd() *cobra.Command {
gc := generateCmd{}
generateCmd := &cobra.Command{
Use: generateName,
Short: generateShortDescription,
Long: generateLongDescription,
RunE: func(cmd *cobra.Command, args []string) error {
if err := gc.validate(cmd, args); err != nil {
log.Fatalf(fmt.Sprintf("error validating generateCmd: %s", err.Error()))
}
if err := gc.mergeAPIModel(); err != nil {
log.Fatalf(fmt.Sprintf("error merging API model in generateCmd: %s", err.Error()))
}
if err := gc.loadAPIModel(cmd, args); err != nil {
log.Fatalf(fmt.Sprintf("error loading API model in generateCmd: %s", err.Error()))
}
return gc.run()
},
}
f := generateCmd.Flags()
f.StringVar(&gc.apimodelPath, "api-model", "", "")
f.StringVar(&gc.outputDirectory, "output-directory", "", "output directory (derived from FQDN if absent)")
f.StringArrayVar(&gc.set, "set", []string{}, "set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
f.BoolVar(&gc.classicMode, "classic-mode", false, "enable classic parameters and outputs")
f.BoolVar(&gc.noPrettyPrint, "no-pretty-print", false, "skip pretty printing the output")
f.BoolVar(&gc.parametersOnly, "parameters-only", false, "only output parameters files")
return generateCmd
}
func (gc *generateCmd) validate(cmd *cobra.Command, args []string) error {
var err error
gc.locale, err = i18n.LoadTranslations()
if err != nil {
return fmt.Errorf(fmt.Sprintf("error loading translation files: %s", err.Error()))
}
if gc.apimodelPath == "" {
if len(args) == 1 {
gc.apimodelPath = args[0]
} else if len(args) > 1 {
cmd.Usage()
return errors.New("too many arguments were provided to 'generate'")
} else {
cmd.Usage()
return errors.New("--api-model was not supplied, nor was one specified as a positional argument")
}
}
if _, err := os.Stat(gc.apimodelPath); os.IsNotExist(err) {
return fmt.Errorf(fmt.Sprintf("specified api model does not exist (%s)", gc.apimodelPath))
}
return nil
}
func (gc *generateCmd) mergeAPIModel() error {
var err error
// if --set flag has been used
if gc.set != nil && len(gc.set) > 0 {
m := make(map[string]transform.APIModelValue)
transform.MapValues(m, gc.set)
// overrides the api model and generates a new file
gc.apimodelPath, err = transform.MergeValuesWithAPIModel(gc.apimodelPath, m)
if err != nil {
return fmt.Errorf(fmt.Sprintf("error merging --set values with the api model: %s", err.Error()))
}
log.Infoln(fmt.Sprintf("new api model file has been generated during merge: %s", gc.apimodelPath))
}
return nil
}
func (gc *generateCmd) loadAPIModel(cmd *cobra.Command, args []string) error {
var err error
apiloader := &api.Apiloader{
Translator: &i18n.Translator{
Locale: gc.locale,
},
}
gc.containerService, gc.apiVersion, err = apiloader.LoadContainerServiceFromFile(gc.apimodelPath, true, false, nil)
if err != nil {
return fmt.Errorf(fmt.Sprintf("error parsing the api model: %s", err.Error()))
}
if gc.outputDirectory == "" {
gc.outputDirectory = path.Join("_output", gc.containerService.Properties.MasterProfile.DNSPrefix)
}
return nil
}
func (gc *generateCmd) run() error {
log.Infoln(fmt.Sprintf("Generating assets into %s...", gc.outputDirectory))
ctx := acsengine.Context{
Translator: &i18n.Translator{
Locale: gc.locale,
},
}
templateGenerator, err := acsengine.InitializeTemplateGenerator(ctx, gc.classicMode)
if err != nil {
log.Fatalf("failed to initialize template generator: %s", err.Error())
}
template, parameters, certsGenerated, err := templateGenerator.GenerateTemplate(gc.containerService, acsengine.DefaultGeneratorCode, false)
if err != nil {
log.Fatalf("error generating template %s: %s", gc.apimodelPath, err.Error())
os.Exit(1)
}
if !gc.noPrettyPrint {
if template, err = transform.PrettyPrintArmTemplate(template); err != nil {
log.Fatalf("error pretty printing template: %s \n", err.Error())
}
if parameters, err = transform.BuildAzureParametersFile(parameters); err != nil {
log.Fatalf("error pretty printing template parameters: %s \n", err.Error())
}
}
writer := &acsengine.ArtifactWriter{
Translator: &i18n.Translator{
Locale: gc.locale,
},
}
if err = writer.WriteTLSArtifacts(gc.containerService, gc.apiVersion, template, parameters, gc.outputDirectory, certsGenerated, gc.parametersOnly); err != nil {
log.Fatalf("error writing artifacts: %s \n", err.Error())
}
return nil
}