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+#+TITLE: SingleFile
+#+DATE: 2024-03-20
+* Prologue
+I am using the [[https://en.wikipedia.org/wiki/Zettelkasten#Use_in_personal_knowledge_management][Zettelkasten]] methodology for personal knowledge
+management, with [[https://www.orgroam.com/][Org-roam]] to implement it.
+
+While the Internet does not forget things in general, it might be
+difficult to find things again. Maybe someone published some
+information in a GitHub gist or has their whole blog there.
+Suddenly GitHub falls out of favour because it got bought by an
+evilcorp and information disappears.
+
+For those reasons I store a link to the information directly, a link
+to the [[https://web.archive.org/][Wayback Machine]] and a local copy. My Zettelkasten and all
+references, including a local copy, are stored in git.
+
+* SingleFile
+[[https://github.com/gildas-lormeau/SingleFile][SingleFile]] is a Firefox[fn::Other browsers are supported as well, I
+just think Firefox is the least-evil one.] extension to save a website,
+including images and css, into a single HTML file. It's perfect for
+personal archival purposes. When run as a plugin it will save the page
+as it is currently rendered. For example dismissed cookie banners will
+not be part of the safes page.
+
+The downside is that it's some semi-manual process to get the backup
+into the Zettelkasten note.
+
+* SingleFile-CLI
+There is also a [[https://github.com/gildas-lormeau/single-file-cli][CLI]] version, like all modern stuff it runs in
+docker. Of course I do not have docker on OpenBSD, nor the alternative
+podman.
+
+So I setup a Fedora VM, installed podman and run singlefile-cli via
+ssh. On the Fedora VM I use this wrapper:
+#+begin_src sh
+  #! /bin/sh
+
+  set -e
+
+  content=$(podman run --privileged -u 0:0 singlefile "$@")
+
+  now=$(date --iso-8601=seconds -u)
+  title=$(echo ${content} | /home/florian/.cargo/bin/htmlq --text title | \
+              awk '{$1=$1};1' | \
+              head -1 | tr -d '\n' | tr -c '[:alnum:]' '_' | cut -c -128)
+
+  fn="/tmp/${title}_${now}.html"
+
+  echo ${content} > ${fn}
+  echo $fn
+#+end_src
+
+It fetches a copy of the website, uses [[https://github.com/mgdm/htmlq][htmlq]] to extract the title,
+removes special characters and saves the page in ~/tmp~. It then spits
+out the file-name of the backup.
+
+On my laptop I have this script:
+#+begin_src sh
+  #! /bin/sh
+
+  set -e
+
+  fn=$(ssh fedora bin/singlefile "$@")
+  bn=$(basename ${fn})
+  scp fedora:${fn} .
+  open ${bn}
+#+end_src
+This causes the Fedora VM to fetch a backup of the website and then
+copies it over and stores it in the current working directory. Finally
+it opens it in the browser for inspection.
+
+*  org-cliplink
+We still do not have links stored in the Zettelkasten note.
+
+For that I use [[https://github.com/rexim/org-cliplink][org-cliplink]] to insert org mode links from the
+clipboard.
+
+A bit of elisp code massages the link text to add "Archive: " or
+"Local: " in front of the title. It also changes the URL for the local
+backup to have it relative so that it works correctly no matter where
+the git repo with the Zettelkasten is checked out.
+
+#+begin_src elisp
+  (use-package org-cliplink
+    :config
+    (defun custom-org-cliplink ()
+      (interactive)
+      (org-cliplink-insert-transformed-title
+       (org-cliplink-clipboard-content)     ;take the URL from the CLIPBOARD
+       (lambda (url title)
+         (let* ((parsed-url (url-generic-parse-url url)) ;parse the url
+                (turl
+                 (cond
+                  ;; if type is file make the url relative to zettelkasten
+                  ((string= (url-type parsed-url) "file")
+                   (url-unhex-string (replace-regexp-in-string "\\(.+\\)\/zettelkasten\/\\(.+\\)" "file:\\2" url)))
+                  ;; otherwise keep the original url
+                  (t url)))
+                (ttitle
+                 (cond
+                  ;; if type is file, add Local: to title
+                  ((string= (url-type parsed-url) "file")
+                   (replace-regexp-in-string "\\(.+\\)" "Local: \\1" title))
+                  ;; otherwise keep the original title
+                  (t title))))
+           ;; forward to the default org-cliplink transformer
+           (org-cliplink-org-mode-link-transformer turl ttitle)))))
+    :custom
+    (org-cliplink-title-replacements
+     '(("https://github.com/.+/?"
+        ("\\(.*\\) · \\(?:Issue\\|Pull Request\\) #\\([0-9]+\\) · \\(.*\\) · GitHub" "\\3#\\2 \\1"))
+       ("https://twitter.com/.+/status/[[:digit:]]+/?"
+        (".+ on Twitter: \\(.+\\)" "\\1"))
+       ("https://web.archive.org/.+/?"
+        ("\\(.+\\)" "Archive: \\1"))))
+    :bind (:map org-mode-map
+                ("C-c C-S-L" . custom-org-cliplink)))
+#+end_src
+
+* Epilogue
+I only recently added singlefile-cli to my work-flow, so far it is a
+big improvement. Time will tell if the backups are cluttered with
+banners and I have to go back to semi-manual mode.