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// Copyright (C) 2016-2019 Vincent Ambo <mail@tazj.in>
//
// This file is part of Kontemplate.
//
// Kontemplate is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
package util
import (
"io/ioutil"
"github.com/ghodss/yaml"
)
// Filenames excluded from templating for the purpose of containing default variable values inside a resource set.
var DefaultFilenames []string = []string{"default.yml", "default.yaml", "default.json"}
// Merges two maps together. Values from the second map override values in the first map.
// The returned map is new if anything was changed.
func Merge(in1 *map[string]interface{}, in2 *map[string]interface{}) *map[string]interface{} {
if in1 == nil || len(*in1) == 0 {
return in2
}
if in2 == nil || len(*in2) == 0 {
return in1
}
// The maps are map[string]interface{} with unknown depth.
// Loop over both maps into every level and merge them.
new := make(map[string]interface{})
for k, v := range *in1 {
new[k] = v
}
for k, v := range *in2 {
if existing, ok := new[k]; ok {
// If both values are maps, merge them recursively
if existingMap, ok := existing.(map[string]interface{}); ok {
if newMap, ok := v.(map[string]interface{}); ok {
new[k] = *Merge(&existingMap, &newMap)
} else {
new[k] = v
}
} else {
new[k] = v
}
} else {
new[k] = v
}
}
return &new
}
// Loads either a YAML or JSON file from the specified path and
// deserialises it into the provided interface.
func LoadData(filename string, addr interface{}) error {
file, err := ioutil.ReadFile(filename)
if err != nil {
return err
}
err = yaml.Unmarshal(file, addr)
if err != nil {
return err
}
return nil
}
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