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main.go
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main.go
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// Binary ogen generates go source code from OAS.
package main
import (
"flag"
"os"
"path/filepath"
"regexp"
"strings"
"time"
"github.com/go-faster/errors"
"go.uber.org/zap"
"github.com/ogen-go/ogen"
"github.com/ogen-go/ogen/gen"
"github.com/ogen-go/ogen/gen/genfs"
"github.com/ogen-go/ogen/internal/ogenzap"
)
func cleanDir(targetDir string, files []os.DirEntry) error {
for _, f := range files {
if f.IsDir() {
continue
}
name := f.Name()
if !strings.HasSuffix(name, "_gen.go") || !strings.HasSuffix(name, "_gen_test.go") {
continue
}
if !(strings.HasPrefix(name, "openapi") || strings.HasPrefix(name, "oas")) {
continue
}
if err := os.Remove(filepath.Join(targetDir, name)); err != nil {
return err
}
}
return nil
}
func generate(specPath, packageName string, fs gen.FileSystem, opts gen.Options) error {
log := opts.Logger
data, err := os.ReadFile(specPath)
if err != nil {
return err
}
spec, err := ogen.Parse(data)
if err != nil {
return errors.Wrap(err, "parse spec")
}
start := time.Now()
g, err := gen.NewGenerator(spec, opts)
if err != nil {
return errors.Wrap(err, "build IR")
}
log.Debug("Build IR", zap.Duration("took", time.Since(start)))
start = time.Now()
if err := g.WriteSource(fs, packageName); err != nil {
return errors.Wrap(err, "write")
}
log.Debug("Write", zap.Duration("took", time.Since(start)))
return nil
}
func run() error {
var (
targetDir = flag.String("target", "api", "Path to target dir")
packageName = flag.String("package", "api", "Target package name")
inferTypes = flag.Bool("infer-types", false, "Infer schema types, if type is not defined explicitly")
performFormat = flag.Bool("format", true, "Perform code formatting")
clean = flag.Bool("clean", false, "Clean generated files before generation")
generateTests = flag.Bool("generate-tests", false, "Generate tests encode-decode/based on schema examples")
allowRemote = flag.Bool("allow-remote", false, "Enables remote references resolving")
skipTestsRegex = flag.String("skip-tests", "", "Skip tests matched by regex")
skipUnimplemented = flag.Bool("skip-unimplemented", false, "Disables generation of UnimplementedHandler")
debugIgnoreNotImplemented = flag.String("debug.ignoreNotImplemented", "",
"Ignore methods having functionality which is not implemented "+
"(all, oneOf, anyOf, allOf, nullable types, complex parameter types)")
debugNoerr = flag.Bool("debug.noerr", false, "Ignore all errors")
logOptions ogenzap.Options
)
logOptions.RegisterFlags(flag.CommandLine)
var (
filterPath *regexp.Regexp
filterMethods []string
)
flag.Func("filter-path", "Filter operations by path regex", func(s string) (err error) {
filterPath, err = regexp.Compile(s)
return err
})
flag.Func("filter-methods", "Filter operations by HTTP methods (comma-separated)", func(s string) error {
for _, m := range strings.Split(s, ",") {
m = strings.TrimSpace(m)
if m == "" {
continue
}
filterMethods = append(filterMethods, m)
}
return nil
})
flag.Parse()
specPath := flag.Arg(0)
if flag.NArg() == 0 || specPath == "" {
return errors.New("no spec provided")
}
switch files, err := os.ReadDir(*targetDir); {
case os.IsNotExist(err):
if err := os.MkdirAll(*targetDir, 0750); err != nil {
return err
}
case err != nil:
return err
default:
if *clean {
if err := cleanDir(*targetDir, files); err != nil {
return errors.Wrap(err, "clean")
}
}
}
logger, err := ogenzap.Create(logOptions)
if err != nil {
return err
}
defer func() {
_ = logger.Sync()
}()
opts := gen.Options{
GenerateExampleTests: *generateTests,
SkipTestRegex: nil, // Set below.
SkipUnimplemented: *skipUnimplemented,
InferSchemaType: *inferTypes,
AllowRemote: *allowRemote,
Filters: gen.Filters{
PathRegex: filterPath,
Methods: filterMethods,
},
IgnoreNotImplemented: strings.Split(*debugIgnoreNotImplemented, ","),
NotImplementedHook: nil,
Logger: logger,
}
if expr := *skipTestsRegex; expr != "" {
r, err := regexp.Compile(expr)
if err != nil {
return errors.Wrap(err, "skipTestsRegex")
}
opts.SkipTestRegex = r
}
if *debugNoerr {
opts.IgnoreNotImplemented = []string{"all"}
}
fs := genfs.FormattedSource{
Root: *targetDir,
Format: *performFormat,
}
if err := generate(specPath, *packageName, fs, opts); err != nil {
return errors.Wrap(err, "generate")
}
return nil
}
func main() {
if err := run(); err != nil {
panic(err)
}
}