70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
// Copyright 2018 Twitch Interactive, Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License"). You may not
|
|
// use this file except in compliance with the License. A copy of the License is
|
|
// located at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// or in the "license" file accompanying this file. This file is distributed on
|
|
// an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
|
|
// express or implied. See the License for the specific language governing
|
|
// permissions and limitations under the License.
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
type commandLineParams struct {
|
|
importPrefix string // String to prefix to imported package file names.
|
|
importMap map[string]string // Mapping from .proto file name to import path.
|
|
tpl bool // generate grpc compatible interface
|
|
}
|
|
|
|
// parseCommandLineParams breaks the comma-separated list of key=value pairs
|
|
// in the parameter (a member of the request protobuf) into a key/value map.
|
|
// It then sets command line parameter mappings defined by those entries.
|
|
func parseCommandLineParams(parameter string) (*commandLineParams, error) {
|
|
ps := make(map[string]string)
|
|
for _, p := range strings.Split(parameter, ",") {
|
|
if p == "" {
|
|
continue
|
|
}
|
|
i := strings.Index(p, "=")
|
|
if i < 0 {
|
|
return nil, fmt.Errorf("invalid parameter %q: expected format of parameter to be k=v", p)
|
|
}
|
|
k := p[0:i]
|
|
v := p[i+1:]
|
|
if v == "" {
|
|
return nil, fmt.Errorf("invalid parameter %q: expected format of parameter to be k=v", k)
|
|
}
|
|
ps[k] = v
|
|
}
|
|
|
|
clp := &commandLineParams{
|
|
importMap: make(map[string]string),
|
|
}
|
|
for k, v := range ps {
|
|
switch {
|
|
case k == "tpl":
|
|
if v == "true" || v == "1" {
|
|
clp.tpl = true
|
|
}
|
|
case k == "import_prefix":
|
|
clp.importPrefix = v
|
|
// Support import map 'M' prefix per https://github.com/golang/protobuf/blob/6fb5325/protoc-gen-go/generator/generator.go#L497.
|
|
case len(k) > 0 && k[0] == 'M':
|
|
clp.importMap[k[1:]] = v // 1 is the length of 'M'.
|
|
case len(k) > 0 && strings.HasPrefix(k, "go_import_mapping@"):
|
|
clp.importMap[k[18:]] = v // 18 is the length of 'go_import_mapping@'.
|
|
default:
|
|
return nil, fmt.Errorf("unknown parameter %q", k)
|
|
}
|
|
}
|
|
return clp, nil
|
|
}
|