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Document workaround for relative links issue with Hugo

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Nick Groenen 2021-04-11 16:22:01 +02:00
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61
README.md
View File

@ -148,6 +148,67 @@ By default, this will trigger an error and display the chain of notes which caus
This behavior may be changed by specifying `--no-recursive-embeds`.
Using this mode, if a note is encountered for a second time while processing the original note, instead of embedding it again a link to the note is inserted instead to break the cycle.
## Relative links with Hugo
The [Hugo](https://gohugo.io) static site generator [does not support relative links to files](https://notes.nick.groenen.me/notes/relative-linking-in-hugo/).
Instead, it expects you to link to other pages using the [`ref` and `relref` shortcodes](https://gohugo.io/content-management/cross-references/).
As a result of this, notes that have been exported from Obsidian using obsidian-export do not work out of the box because Hugo doesn't resolve these links correctly.
[Markdown Render Hooks](https://gohugo.io/getting-started/configuration-markup#markdown-render-hooks) (only supported using the default `goldmark` renderer) allow you to work around this issue however, making exported notes work with Hugo after a bit of one-time setup work.
Create the file `layouts/_default/_markup/render-link.html` with the following contents:
````
{{- $url := urls.Parse .Destination -}}
{{- $scheme := $url.Scheme -}}
<a href="
{{- if eq $scheme "" -}}
{{- if strings.HasSuffix $url.Path ".md" -}}
{{- relref .Page .Destination | safeURL -}}
{{- else -}}
{{- .Destination | safeURL -}}
{{- end -}}
{{- else -}}
{{- .Destination | safeURL -}}
{{- end -}}"
{{- with .Title }} title="{{ . | safeHTML }}"{{- end -}}>
{{- .Text | safeHTML -}}
</a>
{{- /* whitespace stripped here to avoid trailing newline in rendered result caused by file EOL */ -}}
````
And `layouts/_default/_markup/render-image.html` for images:
````
{{- $url := urls.Parse .Destination -}}
{{- $scheme := $url.Scheme -}}
<img src="
{{- if eq $scheme "" -}}
{{- if strings.HasSuffix $url.Path ".md" -}}
{{- relref .Page .Destination | safeURL -}}
{{- else -}}
{{- printf "/%s%s" .Page.File.Dir .Destination | safeURL -}}
{{- end -}}
{{- else -}}
{{- .Destination | safeURL -}}
{{- end -}}"
{{- with .Title }} title="{{ . | safeHTML }}"{{- end -}}
{{- with .Text }} alt="{{ . | safeHTML }}"
{{- end -}}
/>
{{- /* whitespace stripped here to avoid trailing newline in rendered result caused by file EOL */ -}}
````
With these hooks in place, links to both notes as well as file attachments should now work correctly.
>
> Note: If you're using a theme which comes with it's own render hooks, you might need to do a little extra work, or customize the snippets above, to avoid conflicts with the hooks from your theme.
# Library usage

64
docs/usage-advanced.md
View File

@ -48,4 +48,68 @@ By default, this will trigger an error and display the chain of notes which caus
This behavior may be changed by specifying `--no-recursive-embeds`.
Using this mode, if a note is encountered for a second time while processing the original note, instead of embedding it again a link to the note is inserted instead to break the cycle.
## Relative links with Hugo
The [Hugo] static site generator [does not support relative links to files][hugo-relative-linking].
Instead, it expects you to link to other pages using the [`ref` and `relref` shortcodes].
As a result of this, notes that have been exported from Obsidian using obsidian-export do not work out of the box because Hugo doesn't resolve these links correctly.
[Markdown Render Hooks] (only supported using the default `goldmark` renderer) allow you to work around this issue however, making exported notes work with Hugo after a bit of one-time setup work.
Create the file `layouts/_default/_markup/render-link.html` with the following contents:
```
{{- $url := urls.Parse .Destination -}}
{{- $scheme := $url.Scheme -}}
<a href="
{{- if eq $scheme "" -}}
{{- if strings.HasSuffix $url.Path ".md" -}}
{{- relref .Page .Destination | safeURL -}}
{{- else -}}
{{- .Destination | safeURL -}}
{{- end -}}
{{- else -}}
{{- .Destination | safeURL -}}
{{- end -}}"
{{- with .Title }} title="{{ . | safeHTML }}"{{- end -}}>
{{- .Text | safeHTML -}}
</a>
{{- /* whitespace stripped here to avoid trailing newline in rendered result caused by file EOL */ -}}
```
And `layouts/_default/_markup/render-image.html` for images:
```
{{- $url := urls.Parse .Destination -}}
{{- $scheme := $url.Scheme -}}
<img src="
{{- if eq $scheme "" -}}
{{- if strings.HasSuffix $url.Path ".md" -}}
{{- relref .Page .Destination | safeURL -}}
{{- else -}}
{{- printf "/%s%s" .Page.File.Dir .Destination | safeURL -}}
{{- end -}}
{{- else -}}
{{- .Destination | safeURL -}}
{{- end -}}"
{{- with .Title }} title="{{ . | safeHTML }}"{{- end -}}
{{- with .Text }} alt="{{ . | safeHTML }}"
{{- end -}}
/>
{{- /* whitespace stripped here to avoid trailing newline in rendered result caused by file EOL */ -}}
```
With these hooks in place, links to both notes as well as file attachments should now work correctly.
> Note: If you're using a theme which comes with it's own render hooks, you might need to do a little extra work, or customize the snippets above, to avoid conflicts with the hooks from your theme.
[`ref` and `relref` shortcodes]: https://gohugo.io/content-management/cross-references/
[gitignore]: https://git-scm.com/docs/gitignore
[hugo-relative-linking]: https://notes.nick.groenen.me/notes/relative-linking-in-hugo/
[hugo]: https://gohugo.io
[markdown render hooks]: https://gohugo.io/getting-started/configuration-markup#markdown-render-hooks