/
cmdutils.go
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/
cmdutils.go
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// Copyright 2018, 2019 SEE CONTRIBUTORS
// 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 maidenlanedutils
import (
"encoding/json"
"os"
"strconv"
"gopkg.in/yaml.v2"
log "github.com/sirupsen/logrus"
)
// AllOrNoneReqd util for checking parameters that must be provided together
func AllOrNoneReqd(opts ...string) (ok bool) {
var setFlags, unsetFlags []string
for _, opt := range opts {
if opt != "" {
setFlags = append(setFlags, opt)
} else {
unsetFlags = append(unsetFlags, opt)
}
}
ok = !(len(setFlags) != 0 && len(unsetFlags) != 0)
return
}
// DefInt defaults an integer to a value in an Env var, and if not the default integer provided
func DefInt(envVarName string, defValue int) int {
defStr := os.Getenv(envVarName)
if defStr == "" {
return defValue
}
parsedInt, err := strconv.ParseInt(defStr, 10, 32)
if err != nil {
log.Errorf("Invalid string in env var %s", envVarName)
return defValue
}
return int(parsedInt)
}
// MarshalToYAML marshals a JSON annotated structure into YAML, by first going to JSON
func MarshalToYAML(conf interface{}) (yamlBytes []byte, err error) {
var jsonBytes []byte
if jsonBytes, err = json.Marshal(conf); err != nil {
return
}
jsonAsMap := make(map[string]interface{})
if err = json.Unmarshal(jsonBytes, &jsonAsMap); err != nil {
return
}
yamlBytes, err = yaml.Marshal(&jsonAsMap)
return
}