This fixes a regression introduced in v0.93.0 where previously, a
mixed-case key for lineNos would be successfully parsed. This change
moves the configuration key lowercasing step into the configuration
normalization stage, which is called whether the highlighting config
is being parsed from a `string` or a `map`.
Fixes#10682
You can now create custom hook templates for code blocks, either one for all (`render-codeblock.html`) or for a given code language (e.g. `render-codeblock-go.html`).
We also used this new hook to add support for diagrams in Hugo:
* Goat (Go ASCII Tool) is built-in and enabled by default; just create a fenced code block with the language `goat` and start draw your Ascii diagrams.
* Another popular alternative for diagrams in Markdown, Mermaid (supported by GitHub), can also be implemented with a simple template. See the Hugo documentation for more information.
Updates #7765Closes#9538Fixes#9553Fixes#8520Fixes#6702Fixes#9558
Currently the generated `<pre>` element isn't fully accessible as it can't be focused by keyboard users.
To make this fully accessible, the attribute `tabindex="0"` should be added to the `<pre>` tag.
Closes#7194
The main motivation behind this is simplicity and correctnes, but the new small config library is also faster:
```
BenchmarkDefaultConfigProvider/Viper-16 252418 4546 ns/op 2720 B/op 30 allocs/op
BenchmarkDefaultConfigProvider/Custom-16 450756 2651 ns/op 1008 B/op 6 allocs/op
```
Fixes#8633Fixes#8618Fixes#8630
Updates #8591Closes#6680Closes#5192
Avoid creating a local copy of the highlight configuration when no
options are passed.
Benchmarks of building the docs site:
name old time/op new time/op delta
DocsSite-2 1.94s ± 4% 1.93s ± 4% ~ (p=0.841 n=5+5)
name old alloc/op new alloc/op delta
DocsSite-2 666MB ± 1% 656MB ± 0% -1.48% (p=0.008 n=5+5)
name old allocs/op new allocs/op delta
DocsSite-2 8.85M ± 0% 8.76M ± 0% -1.04% (p=0.029 n=4+4)
This commit adds the fast and CommonMark compliant Goldmark as the new default markdown handler in Hugo.
If you want to continue using BlackFriday as the default for md/markdown extensions, you can use this configuration:
```toml
[markup]
defaultMarkdownHandler="blackfriday"
```
Fixes#5963Fixes#1778Fixes#6355
