hugo/docs/content/functions/errorf.md
Brendan Roy 4fc67fe44a tpl: Add errorf template function
Add template function that will build a string from the given format
string and arguments, then log it to ERROR. This has an intended
side-effect of causing the build to fail, when executed.

Resolves #3817
2017-10-03 07:59:51 +02:00

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---
title: errorf
linktitle: errorf
description: Evaluates a format string and logs it to ERROR.
date: 2017-09-30
publishdate: 2017-09-30
lastmod: 2017-09-30
categories: [functions]
menu:
docs:
parent: "functions"
keywords: [strings, log, error]
signature: ["errorf FORMAT INPUT"]
workson: []
hugoversion:
relatedfuncs: [printf]
deprecated: false
aliases: []
---
`errorf` will evaluate a format string, then output the result to the ERROR log.
This will also cause the build to fail.
```
{{ errorf "Something went horribly wrong! %s" err }}
```