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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package command
import (
"encoding/json"
"fmt"
)
// A Command identifies one of gopls' ad-hoc extension commands
// that may be invoked through LSP's executeCommand.
type Command string
func (c Command) String() string { return string(c) }
// IsAsync reports whether the command is asynchronous:
// clients must wait for the "end" progress notification.
func (c Command) IsAsync() bool {
switch string(c) {
// TODO(adonovan): derive this list from interface.go somewhow.
// Unfortunately we can't even reference the enum from here...
case "gopls.run_tests", "gopls.run_govulncheck", "gopls.test":
return true
}
return false
}
// MarshalArgs encodes the given arguments to json.RawMessages. This function
// is used to construct arguments to a protocol.Command.
//
// Example usage:
//
// jsonArgs, err := MarshalArgs(1, "hello", true, StructuredArg{42, 12.6})
func MarshalArgs(args ...interface{}) ([]json.RawMessage, error) {
var out []json.RawMessage
for _, arg := range args {
argJSON, err := json.Marshal(arg)
if err != nil {
return nil, err
}
out = append(out, argJSON)
}
return out, nil
}
// UnmarshalArgs decodes the given json.RawMessages to the variables provided
// by args. Each element of args should be a pointer.
//
// Example usage:
//
// var (
// num int
// str string
// bul bool
// structured StructuredArg
// )
// err := UnmarshalArgs(args, &num, &str, &bul, &structured)
func UnmarshalArgs(jsonArgs []json.RawMessage, args ...interface{}) error {
if len(args) != len(jsonArgs) {
return fmt.Errorf("DecodeArgs: expected %d input arguments, got %d JSON arguments", len(args), len(jsonArgs))
}
for i, arg := range args {
if err := json.Unmarshal(jsonArgs[i], arg); err != nil {
return err
}
}
return nil
}
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