mirror of https://github.com/gohugoio/hugo
76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
// Copyright 2024 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package config
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import (
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"encoding/json"
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"github.com/gohugoio/hugo/identity"
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)
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func DecodeNamespace[S, C any](configSource any, buildConfig func(any) (C, any, error)) (*ConfigNamespace[S, C], error) {
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// Calculate the hash of the input (not including any defaults applied later).
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// This allows us to introduce new config options without breaking the hash.
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h := identity.HashString(configSource)
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// Build the config
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c, ext, err := buildConfig(configSource)
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if err != nil {
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return nil, err
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}
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if ext == nil {
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ext = configSource
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}
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if ext == nil {
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panic("ext is nil")
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}
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ns := &ConfigNamespace[S, C]{
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SourceStructure: ext,
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SourceHash: h,
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Config: c,
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}
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return ns, nil
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}
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// ConfigNamespace holds a Hugo configuration namespace.
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// The construct looks a little odd, but it's built to make the configuration elements
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// both self-documenting and contained in a common structure.
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type ConfigNamespace[S, C any] struct {
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// SourceStructure represents the source configuration with any defaults applied.
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// This is used for documentation and printing of the configuration setup to the user.
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SourceStructure any
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// SourceHash is a hash of the source configuration before any defaults gets applied.
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SourceHash string
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// Config is the final configuration as used by Hugo.
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Config C
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}
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// MarshalJSON marshals the source structure.
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func (ns *ConfigNamespace[S, C]) MarshalJSON() ([]byte, error) {
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return json.Marshal(ns.SourceStructure)
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}
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// Signature returns the signature of the source structure.
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// Note that this is for documentation purposes only and SourceStructure may not always be cast to S (it's usually just a map).
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func (ns *ConfigNamespace[S, C]) Signature() S {
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var s S
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return s
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}
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