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util.go
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/
util.go
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/*
Copyright 2019 The KubeOne 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 util
import (
"bytes"
"text/template"
"github.com/pkg/errors"
)
// TemplateVariables is a render context for templates
type TemplateVariables map[string]interface{}
// MakeShellCommand render text template with given `variables` render-context
func MakeShellCommand(cmd string, variables TemplateVariables) (string, error) {
tpl, err := template.New("base").Parse(cmd)
if err != nil {
return "", errors.Wrap(err, "failed to parse shell script")
}
buf := bytes.Buffer{}
if err := tpl.Execute(&buf, variables); err != nil {
return "", errors.Wrap(err, "failed to render shell script")
}
return buf.String(), nil
}