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