mirror of
https://github.com/gohugoio/hugo.git
synced 2024-06-30 16:15:22 +00:00
02eaddc2fb
Before this commit, due to a bug in Go's `text/template` package, this would print different output for typed nil interface values:
```
{{ if .AuthenticatedUser }}User is authenticated!{{ else }}{{ end }}
{{ if not .AuthenticatedUser }}{{ else }}}User is authenticated!{{ end }}
```
This commit works around this by wrapping every `if` and `with` with a custom `getif` template func with truth logic that matches `not`, `and` and `or`.
Those 3 template funcs from Go's stdlib are now pulled into Hugo's source tree and adjusted to support custom zero values, e.g. types that implement `IsZero`.
This means that you can now do:
```
{{ with .Date }}{{ . }}{{ end }}
```
And it would work as expected.
Fixes #5738
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// Copyright 2018 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 types contains types shared between packages in Hugo.
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package types
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import (
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"fmt"
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"github.com/spf13/cast"
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)
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// KeyValueStr is a string tuple.
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type KeyValueStr struct {
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Key string
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Value string
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}
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// KeyValues holds an key and a slice of values.
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type KeyValues struct {
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Key interface{}
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Values []interface{}
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}
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// KeyString returns the key as a string, an empty string if conversion fails.
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func (k KeyValues) KeyString() string {
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return cast.ToString(k.Key)
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}
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func (k KeyValues) String() string {
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return fmt.Sprintf("%v: %v", k.Key, k.Values)
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}
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// NewKeyValuesStrings takes a given key and slice of values and returns a new
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// KeyValues struct.
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func NewKeyValuesStrings(key string, values ...string) KeyValues {
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iv := make([]interface{}, len(values))
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for i := 0; i < len(values); i++ {
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iv[i] = values[i]
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}
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return KeyValues{Key: key, Values: iv}
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}
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// Zeroer, as implemented by time.Time, will be used by the truth template
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// funcs in Hugo (if, with, not, and, or).
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type Zeroer interface {
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IsZero() bool
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}
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