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