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config.go
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config.go
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// Copyright 2015 CoreOS, Inc.
//
// 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 v2_1
import (
"github.com/coreos/go-semver/semver"
"github.com/flatcar/ignition/config/shared/errors"
"github.com/flatcar/ignition/config/v2_0"
"github.com/flatcar/ignition/config/v2_1/types"
"github.com/flatcar/ignition/config/validate"
"github.com/flatcar/ignition/config/validate/report"
json "github.com/ajeddeloh/go-json"
)
func Parse(rawConfig []byte) (types.Config, report.Report, error) {
if isEmpty(rawConfig) {
return types.Config{}, report.Report{}, errors.ErrEmpty
} else if isCloudConfig(rawConfig) {
return types.Config{}, report.Report{}, errors.ErrCloudConfig
} else if isScript(rawConfig) {
return types.Config{}, report.Report{}, errors.ErrScript
}
var err error
var config types.Config
err = json.Unmarshal(rawConfig, &config)
version, semverErr := semver.NewVersion(config.Ignition.Version)
if err != nil || semverErr != nil || version.LessThan(types.MaxVersion) {
// We can fail unmarshaling if it's an older config. Attempt to parse
// it as such.
config, rpt, err := v2_0.Parse(rawConfig)
if err != nil {
return types.Config{}, rpt, err
}
return TranslateFromV2_0(config), rpt, err
}
if *version != types.MaxVersion {
return types.Config{}, report.Report{}, errors.ErrUnknownVersion
}
rpt := validate.ValidateConfig(rawConfig, config)
if rpt.IsFatal() {
return types.Config{}, rpt, errors.ErrInvalid
}
return config, rpt, nil
}
func isEmpty(userdata []byte) bool {
return len(userdata) == 0
}