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|
package main
import (
"encoding/json"
"flag"
"fmt"
"io"
"log"
"os"
"path/filepath"
"strings"
)
var (
modelPath string
outputPath string
)
func init() {
flag.StringVar(&modelPath, "m", "", "The `path` of the source API models to search for smithy files.")
flag.StringVar(&outputPath, "o", "", "The `path` the API models are copied to")
}
func main() {
flag.Parse()
if len(modelPath) == 0 || len(outputPath) == 0 {
flag.PrintDefaults()
log.Fatalf("model path and output path required")
}
srcModels, err := findSmithyModels(modelPath)
if err != nil {
log.Fatalf("failed to get models, %v", err)
}
for _, model := range srcModels {
if err = copyModelFile(model); err != nil {
log.Fatalf("copy failed, %v", err)
}
}
}
func copyModelFile(model SourceModel) error {
srcFile, err := os.Open(model.SrcFilepath)
if err != nil {
return fmt.Errorf("failed to open source file %w", err)
}
defer srcFile.Close()
dstFile, err := os.OpenFile(filepath.Join(outputPath, model.DstFilename),
os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
return fmt.Errorf("failed to create destination file %w", err)
}
if _, err = io.Copy(dstFile, srcFile); err != nil {
return fmt.Errorf("failed to copy model, %w", err)
}
if err = dstFile.Close(); err != nil {
return fmt.Errorf("failed to close destination file, %w", err)
}
return nil
}
// SourceModel provides the type for a model that should be copied.
type SourceModel struct {
SDKID string
Version string
SrcFilepath string
DstFilename string
}
func findSmithyModels(modelPath string) (map[string]SourceModel, error) {
models := map[string]SourceModel{}
err := filepath.Walk(modelPath,
func(path string, info os.FileInfo, err error) error {
if err != nil || info.IsDir() {
return err
}
if filepath.Ext(info.Name()) != ".json" {
return nil
}
f, err := os.Open(path)
if err != nil {
return err
}
defer f.Close()
var check SmithyCheck
if err = json.NewDecoder(f).Decode(&check); err != nil {
log.Printf("skipping %s file, json but unable to decode, %v",
path, err)
return err
}
if !strings.HasPrefix(check.Smithy, "1.") && !strings.HasPrefix(check.Smithy, "2.") {
return nil
}
var shapes map[string]SmithyShape
if err = json.Unmarshal(check.Shapes, &shapes); err != nil {
return fmt.Errorf("failed to unmarshal smithy model %v, %w",
path, err)
}
for name, shape := range shapes {
if shape.Type != "service" {
continue
}
if len(shape.Version) == 0 {
return fmt.Errorf("smithy service doesn't have version %s %s",
name, path)
}
if shape.Traits.Service == nil {
// Ignore services that don't have an SDK id.
continue
}
if len(shape.Traits.Service.SDKID) == 0 {
return fmt.Errorf("smithy service doesn't have sdkId value %s, %s",
name, path)
}
sdkID := shape.Traits.Service.SDKID
sdkID = strings.ReplaceAll(sdkID, " ", "-")
sdkID = strings.ToLower(sdkID)
if o, ok := models[sdkID]; ok {
return fmt.Errorf("two smithy models have same sdkId %s, 1:%s 2:%s",
sdkID, o.SrcFilepath, path)
}
// TODO what about two services in same model file?
models[sdkID] = SourceModel{
SDKID: sdkID,
Version: shape.Version,
SrcFilepath: path,
DstFilename: sdkID + ".json",
}
}
return nil
},
)
if err != nil {
return nil, err
}
return models, nil
}
// SmithyCheck provides initial JSON object deserialization checking for a
// Smithy json model.
type SmithyCheck struct {
Smithy string `json:"smithy"`
Shapes json.RawMessage `json:"shapes"`
}
// SmithyShape provides JSON object deserialization type for a Smithy Shape
type SmithyShape struct {
Type string `json:"type"`
Version string `json:"version"`
Traits struct {
Service *struct {
SDKID string `json:"sdkId"`
} `json:"aws.api#service"`
} `json:"traits"`
}
|
