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// Copyright 2018 The Hugo Authors. All rights reserved.
//
// 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 config
import (
"path/filepath"
"strings"
"github.com/gohugoio/hugo/common/maps"
"github.com/gohugoio/hugo/parser/metadecoders"
"github.com/spf13/afero"
"github.com/spf13/viper"
)
var (
ValidConfigFileExtensions = []string{"toml", "yaml", "yml", "json"}
validConfigFileExtensionsMap map[string]bool = make(map[string]bool)
)
func init() {
for _, ext := range ValidConfigFileExtensions {
validConfigFileExtensionsMap[ext] = true
}
}
// IsValidConfigFilename returns whether filename is one of the supported
// config formats in Hugo.
func IsValidConfigFilename(filename string) bool {
ext := strings.ToLower(strings.TrimPrefix(filepath.Ext(filename), "."))
return validConfigFileExtensionsMap[ext]
}
// FromConfigString creates a config from the given YAML, JSON or TOML config. This is useful in tests.
func FromConfigString(config, configType string) (Provider, error) {
v := newViper()
m, err := readConfig(metadecoders.FormatFromString(configType), []byte(config))
if err != nil {
return nil, err
}
v.MergeConfigMap(m)
return v, nil
}
// FromFile loads the configuration from the given filename.
func FromFile(fs afero.Fs, filename string) (Provider, error) {
m, err := loadConfigFromFile(fs, filename)
if err != nil {
return nil, err
}
v := newViper()
err = v.MergeConfigMap(m)
if err != nil {
return nil, err
}
return v, nil
}
// FromFileToMap is the same as FromFile, but it returns the config values
// as a simple map.
func FromFileToMap(fs afero.Fs, filename string) (map[string]interface{}, error) {
return loadConfigFromFile(fs, filename)
}
func readConfig(format metadecoders.Format, data []byte) (map[string]interface{}, error) {
m, err := metadecoders.Default.UnmarshalToMap(data, format)
if err != nil {
return nil, err
}
RenameKeys(m)
return m, nil
}
func loadConfigFromFile(fs afero.Fs, filename string) (map[string]interface{}, error) {
m, err := metadecoders.Default.UnmarshalFileToMap(fs, filename)
if err != nil {
return nil, err
}
RenameKeys(m)
return m, nil
}
var keyAliases maps.KeyRenamer
func init() {
var err error
keyAliases, err = maps.NewKeyRenamer(
// Before 0.53 we used singular for "menu".
"{menu,languages/*/menu}", "menus",
)
if err != nil {
panic(err)
}
}
// RenameKeys renames config keys in m recursively according to a global Hugo
// alias definition.
func RenameKeys(m map[string]interface{}) {
keyAliases.Rename(m)
}
func newViper() *viper.Viper {
v := viper.New()
return v
}
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