extract-codeblocks Extract fenced code blocks from Markdown
Flags
--lang string default:
--separator string default:
---
Examples
Extract code from Markdown fenced blocks
Usage
"Here's some code:
```js
const x = 1;
console.log(x);
```
A..." | extract-codeblocksPull code snippets from a ChatGPT response
Usage
"To fix the bug, update your config:
```yaml
server:
port:..." | extract-codeblocksExtract code examples from lesson notes or tutorials
Usage
"## Lesson 3: Functions
```python
def greet(name):
retur..." | extract-codeblocksView source
(input, opts = {})=>{
const lang = (opts.lang || "").toLowerCase();
const sep = opts.separator ?? "\n---\n";
const blocks = [];
const re = /^(`{3,}|~{3,})(\w*)\s*\n([\s\S]*?)^\1\s*$/gm;
let m;
while((m = re.exec(input)) !== null){
const blockLang = (m[2] || "").toLowerCase();
if (!lang || blockLang === lang) {
blocks.push(m[3].replace(/\n$/, ""));
}
}
if (!blocks.length) return "(no code blocks found)";
return blocks.join(sep);
}