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|
package main
import (
"encoding/json"
"flag"
"fmt"
"log"
"os"
"path/filepath"
"regexp"
"strings"
repotools "github.com/awslabs/aws-go-multi-module-repository-tools"
)
var (
atOnce int
rootPath string
pathRelRoot bool
)
var (
modelGlobPattern string
endpointPrefixFilename string
)
func init() {
flag.StringVar(&modelGlobPattern, "m", "",
"The `glob pattern` of the API models.")
flag.StringVar(&endpointPrefixFilename, "o", "",
"The `endpoints prefix` path to write output to.")
}
const stdEndpointPrefixPath = `codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoint-prefix.json`
func run() (err error) {
flag.Parse()
if len(modelGlobPattern) == 0 {
return fmt.Errorf("model glob pattern not provided")
}
if len(endpointPrefixFilename) == 0 {
repoRoot, err := repotools.FindRepoRoot("")
if err != nil {
return fmt.Errorf("failed to find root of repository, %v", err)
}
endpointPrefixFilename = filepath.Join(repoRoot, filepath.FromSlash(stdEndpointPrefixPath))
}
filepaths, err := filepath.Glob(modelGlobPattern)
if err != nil {
return fmt.Errorf("failed to enumerate models %v, %w", modelGlobPattern, err)
}
prefixes := make(map[string]string, len(filepaths))
for _, p := range filepaths {
model, err := loadAPIModel(p)
if err != nil {
return err
}
model.Metadata.ServiceID = getServiceID(model)
if _, ok := exclueServiceID[model.Metadata.ServiceID]; ok {
log.Println("Ignoring", model.Metadata.ServiceID)
continue
}
if len(model.Metadata.EndpointPrefix) == 0 {
return fmt.Errorf("endpoint prefix missing for %v", p)
}
prefixes[model.Metadata.ServiceID] = model.Metadata.EndpointPrefix
}
f, err := os.Create(endpointPrefixFilename)
if err != nil {
return fmt.Errorf("unable to create %v, %w", endpointPrefixFilename, err)
}
defer func() {
fErr := f.Close()
if err == nil && fErr != nil {
err = fmt.Errorf("failed to close endpoints prefix file, %w", fErr)
}
}()
encoder := json.NewEncoder(f)
encoder.SetIndent("", " ")
if err = encoder.Encode(prefixes); err != nil {
return fmt.Errorf("failed to encode endpoint prefixes, %w", err)
}
return nil
}
func loadAPIModel(filename string) (model apiModel, err error) {
f, err := os.Open(filename)
if err != nil {
return apiModel{}, fmt.Errorf("failed to load model, %w", err)
}
defer f.Close()
if err = json.NewDecoder(f).Decode(&model); err != nil {
return apiModel{}, fmt.Errorf("failed to decode model %v, %w", filename, err)
}
return model, nil
}
type apiModel struct {
Metadata struct {
ServiceID string
ServiceFullName string
ServiceAbbreviation string
EndpointPrefix string
} `json:"metadata"`
}
func main() {
if err := run(); err != nil {
flag.PrintDefaults()
log.Fatal(err)
}
}
var exclueServiceID = map[string]struct{}{
"SimpleDB": {},
"ImportExport": {},
}
var serviceIDRegex = regexp.MustCompile("[^a-zA-Z0-9 ]+")
var prefixDigitRegex = regexp.MustCompile("^[0-9]+")
func getServiceID(model apiModel) string {
if len(model.Metadata.ServiceID) > 0 {
return strings.Title(model.Metadata.ServiceID)
}
name := model.Metadata.ServiceAbbreviation
if len(name) == 0 {
name = model.Metadata.ServiceFullName
}
name = strings.Title(name)
name = strings.Replace(name, "Amazon", "", -1)
name = strings.Replace(name, "AWS", "", -1)
name = serviceIDRegex.ReplaceAllString(name, "")
name = prefixDigitRegex.ReplaceAllString(name, "")
name = strings.TrimSpace(name)
return name
}
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