hugo helpers 源码
hugo helpers 代码
文件路径：/tpl/internal/resourcehelpers/helpers.go
// Copyright 2020 The Hugo Authors. All rights reserved.
//
// Portions Copyright The Go Authors.
// 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 resourcehelpers
import (
"errors"
"fmt"
"github.com/gohugoio/hugo/common/maps"
"github.com/gohugoio/hugo/resources"
)
// We allow string or a map as the first argument in some cases.
func ResolveIfFirstArgIsString(args []any) (resources.ResourceTransformer, string, bool) {
if len(args) != 2 {
return nil, "", false
}
v1, ok1 := args[0].(string)
if !ok1 {
return nil, "", false
}
v2, ok2 := args[1].(resources.ResourceTransformer)
return v2, v1, ok2
}
// This roundabout way of doing it is needed to get both pipeline behaviour and options as arguments.
func ResolveArgs(args []any) (resources.ResourceTransformer, map[string]any, error) {
if len(args) == 0 {
return nil, nil, errors.New("no Resource provided in transformation")
}
if len(args) == 1 {
r, ok := args[0].(resources.ResourceTransformer)
if !ok {
return nil, nil, fmt.Errorf("type %T not supported in Resource transformations", args[0])
}
return r, nil, nil
}
r, ok := args[1].(resources.ResourceTransformer)
if !ok {
if _, ok := args[1].(map[string]any); !ok {
return nil, nil, fmt.Errorf("no Resource provided in transformation")
}
return nil, nil, fmt.Errorf("type %T not supported in Resource transformations", args[0])
}
m, err := maps.ToStringMapE(args[0])
if err != nil {
return nil, nil, fmt.Errorf("invalid options type: %w", err)
}
return r, m, nil
}
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