include: adjust to Hugo's build-in link render hook #859

- resolve render hook destination with leading ./
- resolve not only resources but pages as well

exampleSite/content/basics/migration/_index.en.md

@@ -18,6 +18,12 @@ This document shows you what's new in the latest release and flags it with one o
 
 ---
 
+## 6.1.0.beta (XXXX-XX-XX) {#610}
+
+- {{% badge style="note" title=" " %}}Change{{% /badge %}} The [`include` shortcode](shortcodes/include) is now able to resolve links to pages as well as resources or files in the file system (the old behavior).
+
+---
+
 ## 6.0.0 (2024-04-27) {#600}
 
 - {{% badge style="warning" title=" " %}}Breaking{{% /badge %}} This release requires you to move your self-defined variant (`theme-*.css`) and chroma stylesheets (`chroma-*.css`) from `static/css` to `assets/css`.

exampleSite/content/shortcodes/include/_index.en.md

@@ -3,7 +3,7 @@ description = "Displays content from other files"
 title = "Include"
 +++
 
-The `include` shortcode includes other files from your project inside of the current page.
+The `include` shortcode includes other pages, resources or files from your project.
 
 ## Usage
 
@@ -42,7 +42,7 @@ The included files can even contain Markdown and will be taken into account when
 
 | Name                 | Position | Default          | Notes       |
 |----------------------|----------|------------------|-------------|
-| **file**             | 1        | _<empty>_  | The path to the file to be included. Path resolution adheres to [Hugo's build-in `readFile` function](https://gohugo.io/functions/readfile/) |
+| **file**             | 1        | _<empty>_  | The path to the page, resource or file to be included. Page and resource paths adhere to [Hugo's logical path](https://gohugo.io/methods/page/path/). If not found by logical path it falls back to [Hugo's build-in `readFile` function](https://gohugo.io/functions/readfile/) |
 | **hidefirstheading** | 2        | `false`          | When `true` and the included file contains headings, the first heading will be hidden. This comes in handy, eg. if you include otherwise standalone Markdown files. |
 
 ## Examples

layouts/partials/shortcodes/include.html

@@ -3,21 +3,24 @@
   {{- $page = .context }}
   {{- warnf "%q: DEPRECATED parameter 'context' for shortcode 'include' found, use 'page' instead; see https://mcshelby.github.io/hugo-theme-relearn/basics/migration#5180" $page.File.Filename }}
 {{- end }}
-{{- $file := .file }}
+{{- $u := urls.Parse .file }}
+{{- $path := strings.TrimPrefix "./" $u.Path }}
 {{- $content := "" }}
 {{- with or
-  ($page.Resources.Get $file)
-  (resources.Get $file)
+  ($page.Page.GetPage $path)
+  ($page.Page.GetPage (strings.TrimRight "/" $path))
+  ($page.Page.Resources.Get $path)
+  (resources.Get $path)
 }}
   {{- $content = .Content }}
 {{- else }}
-  {{- if (fileExists $file) }}
-    {{- $content = $file | readFile }}
+  {{- if (fileExists .file) }}
+    {{- $content = .file | readFile }}
   {{- else }}
     {{- if eq $page.Site.Params.include.errorlevel "warning" }}
-      {{- warnf "%q: file '%s' is not a resource nor accessible via file system" $page.File.Filename $file }}
+      {{- warnf "%q: included file '%s' is not a page, resource or accessible via file system" $page.File.Filename .file }}
     {{- else if eq $page.Site.Params.include.errorlevel "error" }}
-      {{- errorf "%q: image '%s' is not a resource nor accessible via file system" $page.File.Filename $file }}
+      {{- errorf "%q: included file '%s' is not a page, resource or accessible via file system" $page.File.Filename .file }}
     {{- end }}
   {{- end }}
 {{- end }}