sascha-andres/go-template

// 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"
    "path"
)

// handleExplicitTemplate applies templating to a file
func (e *Engine) handleExplicitTemplate(workingDirectory, explicitTemplateFile, name string, arguments map[string]string) {
    if e.err != nil {
        return
    }
    fileToProcess := path.Join(workingDirectory, explicitTemplateFile)
    f, err := os.Open(fileToProcess)
    if err != nil {
        e.err = err
        return
    }
    defer func() {
        err := f.Close()
        if err != nil {
            e.logger.WithField("method", "handleExplicitTemplate").Errorf("error closing file: [%s]", err.Error())
        }
    }()
    fileContent, err := ioutil.ReadAll(f)
    if err != nil {
        e.err = err
        return
    }
    replacedContent, err := applyVariables(string(fileContent), name, arguments)
    if err != nil {
        e.err = err
        return
    }
    stat, err := os.Stat(fileToProcess)
    if err != nil {
        e.err = err
        return
    }
    if err := ioutil.WriteFile(fileToProcess, []byte(replacedContent), stat.Mode()); err != nil {
        e.err = err
        return
    }
}

func (e *Engine) handleExplicitTemplates(workingDirectory, name string, arguments map[string]string) {
    if e.err != nil {
        return
    }
    for _, explicitTemplateFile := range e.templateFile.Transformation.Templates {
        e.handleExplicitTemplate(workingDirectory, explicitTemplateFile, name, arguments)
    }
}