Hexo: {% %} should not be rendered in a post

[yifei325325]

Environment Info

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Hexo and Plugin version(npm ls --depth 0):

For BUG

比如新建一个名为“test.md”的文档，在里面包含以下这句话，
测试测试测试{% test %}测试测试
在使用hexo g 命令时就会报错，提示Template render error: (unknown path)
而如果把上面的文字改成
测试测试测试

{% test %}

测试
这样使用hexo g 命令就会通过。

而在markdown 编辑器中 ，测试测试测试{% test %}测试测试 这样的写法是支持的，预览也不会出任何问题。

For question

For feature request

[gautamz07]

I suppose your not suppose to have ejs code inside your .md file , are to trying to showcase a code snippet ?

[yifei325325]

Thanks for your reply, now i try to explain my issue in English.

when i have a markdown file like test.md, all the markdown syntax passed the "hexo g" command. but when i include the statement like this

codes for example {% test code %} code for example

ignores the dash please. the two " ` " means ,there is a code inside.

when i try to use "hexo g" command to compile the file to html file. it shows the error like "Template render error: (unknown path) ". But when i delete this statement, everything goes fine.
How odd!

[yifei325325]

but when i write the code like this

use the "hexo g" command , every thing goes well. @gautamz07

[YoshinoriN]

Same problem reported at (#2515 )
But, it seems solved (#2461)

We need investigation.

[yifei325325]

Same problem reported at (#2515 )
But, it seems solved (#2461)

We need investigation.

thank for your reply, but i think they fixed this bug on 31 March 2017.
and my hexo version is 3.7.1 which released on 7 months ago.

[YoshinoriN]

Yup, I know. I reproduce it v3.8.0
I think, this problem is a regression bug or not fixed in #2461

[yifei325325]

Yup, I know. I reproduce it v3.8.0
I think, this problem is a regression bug or not fixed in #2461

Thanks, I got it. hope it will be fixed on next release version.

[52Heartz]

我今天也遇到了这个问题，我对问题的理解以及解决方法如下：

首先，{% test %} 是一个未知的标签，Hexo 是不会支持的，支持的标签可以参考这个官方文档：标签插件（Tag Plugins）

另外，即使这个标签是 Hexo 支持的，那么 {% xxx %} 和 {% endxxx %} 需要配合使用，一个标志开始，一个标志结束，不能只用一个。

只使用一个会报错 unexpected end of file。如果使用错误的标签名会报错 unknown block tag: xxx。

另外，如果文章中出现单独的 {{ 或者 }} 也会报错，原因也是因为 {{ 和 }} 被 Hexo 当作标签的标志来处理了。

更多的内容，可以参考我博客的这篇文章：Hexo 的 Template render error 错误

[SukkaW]

The issue is related to post rendering process, which I had a look at during the review of PR https://github.com/hexojs/hexo/pull/4161.

The post rendering process could be described as follows: https://github.com/hexojs/hexo/pull/4161#issuecomment-591802138

[SukkaW]

Could be fixed by #4171.

[curbengh]

the example given in #3259,

`{{ 1+1 }}`

will be rendered to, (which is not desired)

<code>2</code>

A workaround is to use {% raw %},

`{% raw %}{{ 1+1 }}{% endraw %}`

that will be rendered to the expected result,

<code>{{ 1+1 }}</code>

but if a post has many template examples, that's a lot of typing.

However, triple backtick does work as expected though,

```
{{ 1+1 }}
```

which will rendered to code highlighted "{{ 1+1 }}".

TL;DR nunjucks template is not rendered in triple backtick (as expected), but rendered in single backtick (not expected).

@SukkaW @stevenjoezhang @seaoak

I understand #4171 has already include many fixes, but I wonder if it can help #3259.