blob: 0a90251d3189082cc5b41c5380bdc7f1d4baf06b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
---
title: fmt.Warnf
description: Log a WARNING from a template.
categories: []
keywords: []
action:
aliases: [warnf]
related:
- functions/fmt/Errorf
- functions/fmt/Erroridf
returnType: string
signatures: ['fmt.Warnf FORMAT [INPUT]']
aliases: [/functions/warnf]
---
{{% include "functions/fmt/_common/fmt-layout.md" %}}
The `warnf` function evaluates the format string, then prints the result to the WARNING log. Hugo prints each unique message once to avoid flooding the log with duplicate warnings.
```go-html-template
{{ warnf "The %q shortcode was unable to find %s. See %s" .Name $file .Position }}
```
To prevent suppression of duplicate messages when using `warnf` for debugging, make each message unique with the [`math.Counter`] function. For example:
```go-html-template
{{ range site.RegularPages }}
{{ .Section | warnf "%#[2]v [%[1]d]" math.Counter }}
{{ end }}
```
[`math.Counter`]: /functions/math/counter
|
