Hyperlink to a file in a sidebar widget

[Calife]

Dear all,
I have added a widget to a sidebar. I try to figure out how to add a hyperlink in this widget to a file related to the current displayed post. The file in question stands in the directory of the post, i.e.
./content/posts/my-post/my-file.pdf
The code of the widget I created is:

{{- $download := .Site.Taxonomies.download }}
<div class="sidecard">
  <div class="widget widget-download block">
    <h3 class="widget-download__title widget__title">{{ T "widget-download_title" }}</h3>
    <div class="widget-download__content widget__content">
      <ul class="widget-download__list widget__list">
        <li class="widget-download__item widget__item">
          <a class="widget-download__link widget__link transition" href="{{ .RelPermalink }}">
            {{- .Title -}}
          </a>
        </li>
      </ul>
    </div>
  </div>
</div>

What is displayed is a link to the current page, but not to the file.pdf
I may change {{- .Title -}} but I don’t know what syntax I should use instead.
Thank you for your help.

[jmooring]

structure

content
├── posts/
│   └── my-post/
│       ├── index.md
│       └── my-file.pdf
└── _index.md

template

{{ with .Resources.Get "my-file.pdf" }}
  <a href="{{ .RelPermalink }}">{{ .Name }}</a>
{{ end }}

If you want to force the browser to download the file instead of opening it, add the download attribute to the anchor element.

[Calife]

Thank you very much for your swift reply. I was just logging in to reply to myself as I found a solution which may not be as elegant as yours. I do not wish to hard-code the name of the file in the widgets file. So I wrote this code which makes it:

{{ with .File }}
  <a class="widget-download__link widget__link transition" href="../{{ .TranslationBaseName }}.pdf" target="_blank">
  {{- .File -}}
  </a>
{{ end }}

Unless there is a way to avoid hard-coding the name of the file as this name changes for every post.

Many thanks again.

[jmooring]

{{ with .Resources.GetMatch "*.pdf" }}
  <a href="{{ .RelPermalink }}">{{ .Name }}</a>
{{ end }}

This will return the first file that matches the glob pattern.

Or use the printf function in conjunction with the .Resources.Get method.

[Calife]

This is great! Thank you very much.