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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| package cli | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "os" | ||
| "reflect" | ||
| "sort" | ||
| "strings" | ||
|
|
||
| "github.com/centrifugal/centrifugo/v5/internal/config/envconfig" | ||
|
|
||
| "github.com/centrifugal/centrifugo/v5/internal/config" | ||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
||
| func DefaultEnvCommand() *cobra.Command { | ||
| var baseConfigFile string | ||
| var defaultEnvCmd = &cobra.Command{ | ||
| Use: "defaultenv", | ||
| Short: "Generate full environment var list with defaults", | ||
| Long: `Generate full Centrifugo environment var list with defaults`, | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| DefaultEnv(baseConfigFile) | ||
| }, | ||
| } | ||
| defaultEnvCmd.Flags().StringVarP(&baseConfigFile, "base", "b", "", "path to the base config file to use") | ||
| return defaultEnvCmd | ||
| } | ||
|
|
||
| func DefaultEnv(baseFile string) { | ||
| conf, meta, err := config.GetConfig(nil, baseFile) | ||
| if err != nil { | ||
| fmt.Printf("error: %v\n", err) | ||
| os.Exit(1) | ||
| } | ||
| if err = conf.Validate(); err != nil { | ||
| fmt.Printf("error: %v\n", err) | ||
| os.Exit(1) | ||
| } | ||
| printSortedEnvVars(meta.KnownEnvVars) | ||
| } | ||
|
|
||
| func printSortedEnvVars(knownEnvVars map[string]envconfig.VarInfo) { | ||
| var envKeys []string | ||
| for env := range knownEnvVars { | ||
| envKeys = append(envKeys, env) | ||
| } | ||
| sort.Strings(envKeys) | ||
| for _, env := range envKeys { | ||
| if strings.HasSuffix(env, "-") { | ||
| // Hacky way to skip unnecessary struct field, can be based on struct tag. | ||
| continue | ||
| } | ||
| fmt.Printf("%s=%s\n", env, valueToStringReflect(knownEnvVars[env].Field)) | ||
| } | ||
| } | ||
|
|
||
| // valueToStringReflect converts a reflect.Value to a string in a way suitable for environment variables. | ||
| func valueToStringReflect(v reflect.Value) string { | ||
| switch v.Kind() { | ||
| case reflect.Slice, reflect.Array: | ||
| // Check if the element type of the slice/array is a struct | ||
| if v.Type().Elem().Kind() == reflect.Struct { | ||
| // Marshal the entire array/slice of structs to JSON | ||
| jsonValue, err := json.Marshal(v.Interface()) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| // Escape double quotes to make the value suitable for environment variables | ||
| return fmt.Sprintf("\"%v\"", strings.ReplaceAll(string(jsonValue), `"`, `\"`)) | ||
| } | ||
| var elements []string | ||
| for i := 0; i < v.Len(); i++ { | ||
| elements = append(elements, valueToStringReflect(v.Index(i))) | ||
| } | ||
| if len(elements) == 0 { | ||
| return "\"\"" | ||
| } | ||
| return fmt.Sprintf("%v", strings.Join(elements, " ")) | ||
| case reflect.Struct: | ||
| // You can customize how structs should be serialized if needed | ||
| return fmt.Sprintf("%v", v.Interface()) // Fallback to default formatting (customize if necessary) | ||
| case reflect.Map: | ||
| jsonValue, err := json.Marshal(v.Interface()) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| // Escape double quotes to make the value suitable for environment variables | ||
| return fmt.Sprintf("\"%v\"", strings.ReplaceAll(string(jsonValue), `"`, `\"`)) | ||
| case reflect.Ptr: | ||
| if v.IsNil() { | ||
| return "" | ||
| } | ||
| return valueToStringReflect(v.Elem()) // Dereference the pointer and recursively process | ||
| case reflect.Invalid: | ||
| return "" // Handle zero/nil values | ||
| case reflect.String: | ||
| return fmt.Sprintf("\"%v\"", v.Interface()) | ||
| default: | ||
| // Fallback for other types (int, bool, etc.) | ||
| return fmt.Sprintf("%v", v.Interface()) | ||
| } | ||
| } |
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