deno_std

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I have the following code to extract front matter data from files:

import { extract, test } from "./deps/front_matter.ts";

if (test(content)) {
    const { attrs = {}, body } = extract<Data>(content);
    attrs.content = body;

    return attrs;
}

The test function returns true with Markdown files with separators like ---. For example.

# Project title

---

This is a description of the project

- **Author:** The DPM Authors
- **Version:** 0.1.0
- **License:** MIT

---

MIT License

And this makes the script to fail:

TypeError: Failed to extract front matter
    at extract (https://deno.land/[email protected]/encoding/front_matter.ts:56:9)

To consider that a file content has front matter, the triple dash separator must be at the begining of the content. In this case there's a title before, so the test function should return false.

Steps to Reproduce

1. Create a file with markdown content and two separators ---.
2. Run the test function with this content.
3. The function returns true.

• OS: MacOS 12
• deno version: 1.25
• std version: 0.153.0

The bug is actuallly happening, I'm already working on fixing it!

I have added a exclusive validation for the first line for multiline texts like yours, I think that should do the trick

closed by #2801