databricks-cli/libs/flags/json_flag.go

93 lines
2.0 KiB
Go

package flags
import (
"encoding/json"
"fmt"
"os"
"reflect"
"github.com/databricks/cli/libs/diag"
"github.com/databricks/cli/libs/dyn/convert"
"github.com/databricks/cli/libs/dyn/jsonloader"
"github.com/databricks/databricks-sdk-go/marshal"
)
type JsonFlag struct {
raw []byte
source string
}
func (j *JsonFlag) String() string {
return fmt.Sprintf("JSON (%d bytes)", len(j.raw))
}
// TODO: Command.MarkFlagFilename()
func (j *JsonFlag) Set(v string) error {
// Load request from file if it starts with '@' (like curl).
if v[0] != '@' {
j.raw = []byte(v)
j.source = "(inline)"
return nil
}
filePath := v[1:]
buf, err := os.ReadFile(filePath)
j.source = filePath
if err != nil {
return fmt.Errorf("read %s: %w", filePath, err)
}
j.raw = buf
return nil
}
func (j *JsonFlag) Unmarshal(v any) diag.Diagnostics {
if j.raw == nil {
return nil
}
dv, err := jsonloader.LoadJSON(j.raw, j.source)
if err != nil {
return diag.FromErr(err)
}
// First normalize the input data.
// It will convert all the values to the correct types.
// For example string literals for booleans and integers will be converted to the correct types.
nv, diags := convert.Normalize(v, dv)
if diags.HasError() {
return diags
}
// Then marshal the normalized data to the output.
// It will serialize all set data with the correct types.
data, err := json.Marshal(nv.AsAny())
if err != nil {
return diags.Extend(diag.FromErr(err))
}
kind := reflect.ValueOf(v).Kind()
if kind == reflect.Ptr {
kind = reflect.ValueOf(v).Elem().Kind()
}
if kind == reflect.Struct {
// Finally unmarshal the normalized data to the output.
// It will fill in the ForceSendFields field if the struct contains it.
err = marshal.Unmarshal(data, v)
if err != nil {
return diags.Extend(diag.FromErr(err))
}
} else {
// If the output is not a struct, just unmarshal the data to the output.
err = json.Unmarshal(data, v)
if err != nil {
return diags.Extend(diag.FromErr(err))
}
}
return diags
}
func (j *JsonFlag) Type() string {
return "JSON"
}