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// Copyright 2022 The Sigstore Authors.
//
// 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 ntpmonitor
import (
// a blank import is recommended by the Go docs
// when using embed with byte slices
_ "embed"
"fmt"
"os"
"gopkg.in/yaml.v3"
)
//go:embed ntpsync.yaml
var defaultConfigData []byte
// Config holds the configuration for a NTPMonitor
type Config struct {
RequestAttempts int `yaml:"request_attempts"`
RequestTimeout int `yaml:"request_timeout"`
NumServers int `yaml:"num_servers"`
MaxTimeDelta int `yaml:"max_time_delta"`
ServerThreshold int `yaml:"server_threshold"`
Period int `yaml:"period"`
Servers []string `yaml:"servers"`
}
// LoadConfig reads a yaml file from a provided path, instantiating a new
// Config object with the vales found. No sanity checking is made of the
// loaded values.
func LoadConfig(path string) (*Config, error) {
var configData []byte
if path == "" {
configData = defaultConfigData
} else {
data, err := os.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("failed to read file: %s %w",
path, err)
}
configData = data
}
var cfg Config
if err := yaml.Unmarshal(configData, &cfg); err != nil {
return nil, fmt.Errorf("failed to parse YAML: %w", err)
}
return &cfg, nil
}
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