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/*
* config.go - Parsing for our global config file. The file is simply the JSON
* output of the Config protocol buffer.
*
* Copyright 2017 Google Inc.
* Author: Joe Richey (joerichey@google.com)
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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 metadata contains all of the on disk structures.
// These structures are defined in metadata.proto. The package also
// contains functions for manipulating these structures, specifically:
// * Reading and Writing the Config file to disk
// * Getting and Setting Policies for directories
// * Reasonable defaults for a Policy's EncryptionOptions
package metadata
//go:generate protoc --go_out=. metadata.proto
import (
"io"
"strings"
"github.com/golang/protobuf/jsonpb"
)
// WriteConfig outputs the Config data as nicely formatted JSON
func WriteConfig(config *Config, out io.Writer) error {
m := jsonpb.Marshaler{
EmitDefaults: true,
EnumsAsInts: false,
Indent: "\t",
OrigName: true,
}
if err := m.Marshal(out, config); err != nil {
return err
}
_, err := out.Write([]byte{'\n'})
return err
}
// ReadConfig writes the JSON data into the config structure
func ReadConfig(in io.Reader) (*Config, error) {
config := new(Config)
// Allow (and ignore) unknown fields for forwards compatibility.
u := jsonpb.Unmarshaler{
AllowUnknownFields: true,
}
return config, u.Unmarshal(in, config)
}
// HasCompatibilityOption returns true if the specified string is in the list of
// compatibility options. This assumes the compatibility options are in a comma
// separated string.
func (c *Config) HasCompatibilityOption(option string) bool {
options := strings.Split(c.Compatibility, ",")
for _, o := range options {
if o == option {
return true
}
}
return false
}
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