sascha-andres/go-template

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read_template_file.go

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// Copyright © 2018 Sascha Andres <sascha.andres@outlook.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 engine

import (
    "io/ioutil"
    "os"

    yaml "gopkg.in/yaml.v2"
)

// readTemplateFile reads a specified template file and returns it
func (e *Engine) readTemplateFile(path string) error {
    logger := e.logger.WithField("method", "readTemplateFile")
    logger.Debugf("reading [%s]", path)
    f, err := os.Open(path)
    if err != nil {
        return err
    }
    defer func() {
        if err := f.Close(); err != nil {
            logger.Error(err.Error())
        }
    }()
    content, err := ioutil.ReadAll(f)
    if err != nil {
        return err
    }
    var templateFile TemplateFile
    err = yaml.Unmarshal(content, &templateFile)
    if err != nil {
        return err
    }
    e.templateFile = &templateFile
    return err
}