124 lines
2.7 KiB
Go
124 lines
2.7 KiB
Go
package main
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import (
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"fmt"
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"go/build"
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"go/types"
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"log"
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"os"
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"path"
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"path/filepath"
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"strings"
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)
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const rootPkg = "github.com/traefik/traefik/v3/pkg/config/dynamic"
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const (
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destModuleName = "github.com/traefik/genconf"
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destPkg = "dynamic"
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)
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const marsh = `package %s
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import "encoding/json"
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type JSONPayload struct {
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*Configuration
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}
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func (c JSONPayload) MarshalJSON() ([]byte, error) {
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if c.Configuration == nil {
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return nil, nil
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}
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return json.Marshal(c.Configuration)
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}
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`
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// main generate Go Structures from Go structures.
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// Allows to create an external module (destModuleName) used by the plugin's providers
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// that contains Go structs of the dynamic configuration and nothing else.
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// These Go structs do not have any non-exported fields and do not rely on any external dependencies.
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func main() {
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dest := filepath.Join(path.Join(build.Default.GOPATH, "src"), destModuleName, destPkg)
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log.Println("Output:", dest)
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err := run(dest)
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if err != nil {
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log.Fatal(err)
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}
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}
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func run(dest string) error {
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centrifuge, err := NewCentrifuge(rootPkg)
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if err != nil {
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return err
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}
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centrifuge.IncludedImports = []string{
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"github.com/traefik/traefik/v3/pkg/tls",
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"github.com/traefik/traefik/v3/pkg/types",
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}
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centrifuge.ExcludedTypes = []string{
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// tls
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"CertificateStore", "Manager",
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// dynamic
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"Message", "Configurations",
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// types
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"HTTPCodeRanges", "HostResolverConfig",
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}
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centrifuge.ExcludedFiles = []string{
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"github.com/traefik/traefik/v3/pkg/types/logs.go",
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"github.com/traefik/traefik/v3/pkg/types/metrics.go",
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}
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centrifuge.TypeCleaner = cleanType
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centrifuge.PackageCleaner = cleanPackage
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err = centrifuge.Run(dest, destPkg)
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if err != nil {
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return err
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}
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return os.WriteFile(filepath.Join(dest, "marshaler.go"), []byte(fmt.Sprintf(marsh, destPkg)), 0o666)
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}
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func cleanType(typ types.Type, base string) string {
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if typ.String() == "github.com/traefik/traefik/v3/pkg/tls.FileOrContent" {
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return "string"
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}
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if typ.String() == "[]github.com/traefik/traefik/v3/pkg/tls.FileOrContent" {
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return "[]string"
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}
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if typ.String() == "github.com/traefik/paerser/types.Duration" {
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return "string"
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}
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if strings.Contains(typ.String(), base) {
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return strings.ReplaceAll(typ.String(), base+".", "")
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}
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if strings.Contains(typ.String(), "github.com/traefik/traefik/v3/pkg/") {
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return strings.ReplaceAll(typ.String(), "github.com/traefik/traefik/v3/pkg/", "")
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}
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return typ.String()
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}
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func cleanPackage(src string) string {
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switch src {
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case "github.com/traefik/paerser/types":
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return ""
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case "github.com/traefik/traefik/v3/pkg/tls":
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return path.Join(destModuleName, destPkg, "tls")
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case "github.com/traefik/traefik/v3/pkg/types":
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return path.Join(destModuleName, destPkg, "types")
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default:
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return src
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}
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}
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