#+TITLE: External Dependencies for Emacs Configuration
#+AUTHOR: Analysis by Claude Code
#+DATE: 2025-11-04

* Overview

This document catalogs ALL external dependencies (non-Emacs, non-Emacs-packages) required
for this Emacs configuration to function fully on Arch Linux.

Dependencies are organized by functionality area with installation commands for pacman/yay.

* Quick Reference

** Minimal Install (Basic Functionality)
#+BEGIN_SRC bash
sudo pacman -S git ripgrep fd
#+END_SRC

** Recommended Install (Common Workflows)
#+BEGIN_SRC bash
# Core tools
sudo pacman -S git ripgrep fd xdg-utils curl

# Media (if using)
sudo pacman -S ffmpeg yt-dlp task-spooler mpv libpulse

# Development
sudo pacman -S clang shellcheck shfmt python-pip
pip install --user python-lsp-server[all] flake8
npm install -g bash-language-server

# Documents
sudo pacman -S pandoc texlive-core
#+END_SRC

** Full Install (All Features)
#+BEGIN_SRC bash
# System tools
sudo pacman -S git ripgrep fd xdg-utils curl dunst

# Media & transcription
sudo pacman -S ffmpeg yt-dlp task-spooler mpv libpulse
yay -S python-openai-whisper  # Or use scripts/install-whisper.sh

# Email
sudo pacman -S mu isync msmtp

# Grammar & spelling
sudo pacman -S languagetool aspell aspell-en

# PDF & documents
sudo pacman -S poppler zathura zathura-pdf-mupdf pandoc

# LaTeX (if needed)
sudo pacman -S texlive-most

# Programming tools
sudo pacman -S clang shellcheck shfmt graphviz
pip install --user python-lsp-server[all] flake8 mypy
npm install -g bash-language-server typescript-language-server

# File managers (choose one)
sudo pacman -S thunar  # or nautilus, dolphin, pcmanfm

# Browsers (choose one)
sudo pacman -S firefox  # or chromium
#+END_SRC

* Core System Tools

** Git - Version Control
- *Package:* =git=
- *Used by:* magit, forge, vc-config.el, all development workflows
- *Functionality:* Essential for version control, package management
- *Required:* YES
- *Install:* =sudo pacman -S git=

* Audio/Video Recording & Transcription

** FFmpeg - Media Processing
- *Package:* =ffmpeg=
- *Used by:* modules/video-audio-recording.el, scripts/install-whisper.sh
- *Functionality:* Desktop video/audio recording, media conversion
- *Required:* YES (if using recording features)
- *Install:* =sudo pacman -S ffmpeg=
- *Note:* Explicitly checked in =cj/recording-check-ffmpeg=

** PulseAudio/PipeWire Utils - Audio Device Management
- *Package:* =libpulse= (provides =pactl= command)
- *Used by:* modules/video-audio-recording.el
- *Functionality:* Audio device detection and selection for recording
- *Required:* YES (if using recording features)
- *Install:* =sudo pacman -S libpulse=
- *Commands used:* =pactl list sources short=

** Whisper (OpenAI) - Speech-to-Text
- *Package:* =python-openai-whisper= (AUR)
- *Used by:* scripts/local-whisper, modules/transcription-config.el
- *Functionality:* Local audio transcription (offline)
- *Required:* OPTIONAL (alternative: OpenAI API with curl)
- *Install:* =yay -S python-openai-whisper= OR =~/.emacs.d/scripts/install-whisper.sh=
- *Uninstall:* =~/.emacs.d/scripts/uninstall-whisper.sh=
- *Size:* ~500MB with models

* Grammar & Spell Checking

** LanguageTool - Grammar Checker
- *Package:* =languagetool=
- *Used by:* scripts/languagetool-flycheck, modules/flycheck-config.el
- *Functionality:* Comprehensive grammar and style checking
- *Required:* OPTIONAL (only if using grammar checking with =C-; ?=)
- *Install:* =sudo pacman -S languagetool=
- *Size:* ~222MB
- *Dependencies:* Python 3 (for wrapper script at scripts/languagetool-flycheck)
- *Keybinding:* =C-; ?= in org/text/markdown buffers

** Aspell/Hunspell/Ispell - Spell Checking
- *Packages:* =aspell= (recommended) OR =hunspell= OR =ispell=
- *Used by:* modules/flyspell-and-abbrev.el
- *Functionality:* Real-time spell checking
- *Required:* OPTIONAL (choose one of the three)
- *Install:* =sudo pacman -S aspell aspell-en= (recommended)
- *Note:* Config checks for any of the three spell checkers

* Email System

** Mu - Email Indexer
- *Package:* =mu=
- *Used by:* modules/mail-config.el, scripts/setup-email.sh
- *Functionality:* Email indexing and search (provides mu4e)
- *Required:* YES (if using email)
- *Install:* =sudo pacman -S mu=
- *Provides:* =mu= command and mu4e elisp files

** Isync (mbsync) - Email Sync
- *Package:* =isync=
- *Used by:* modules/mail-config.el, scripts/setup-email.sh
- *Functionality:* IMAP email synchronization
- *Required:* YES (if using email)
- *Install:* =sudo pacman -S isync=
- *Provides:* =mbsync= command

** msmtp - SMTP Email Sending
- *Package:* =msmtp=
- *Used by:* modules/mail-config.el, scripts/setup-email.sh
- *Functionality:* Sending emails via SMTP
- *Required:* YES (if using email)
- *Install:* =sudo pacman -S msmtp=

* Media Playback & Downloading

** yt-dlp - Media Downloader
- *Package:* =yt-dlp=
- *Used by:* modules/media-utils.el, modules/quick-video-capture.el, modules/elfeed-config.el
- *Functionality:* Download videos from YouTube and 1000+ sites
- *Required:* YES (if using video download or media playback from web)
- *Install:* =sudo pacman -S yt-dlp=

** Task Spooler (tsp) - Queue Management
- *Package:* =task-spooler=
- *Used by:* modules/media-utils.el (=cj/yt-dl-it= function)
- *Functionality:* Queue and background management for downloads
- *Required:* YES (if using video download)
- *Install:* =sudo pacman -S task-spooler=

** Media Players (Choose One or More)
- *MPV* - =mpv= (recommended - works without stream URL extraction)
- *VLC* - =vlc=
- *MPlayer* - =mplayer=
- *Used by:* modules/media-utils.el (customizable via =cj/media-players=)
- *Functionality:* Playing media URLs
- *Required:* OPTIONAL (choose preferred player)
- *Install:* =sudo pacman -S mpv= (recommended)

* PDF & Document Viewing

** PDF Tools Server
- *Package:* Auto-built by pdf-tools package on first Emacs launch
- *Requires:* =poppler= library (usually already installed)
- *Used by:* modules/pdf-config.el
- *Functionality:* Fast PDF rendering in Emacs
- *Required:* OPTIONAL (Emacs can use DocView as fallback)
- *Install:* =sudo pacman -S poppler=
- *Note:* pdf-tools will compile its server component automatically

** Zathura - External PDF Viewer
- *Package:* =zathura= and =zathura-pdf-mupdf=
- *Used by:* modules/pdf-config.el, modules/latex-config.el
- *Functionality:* External PDF viewing (alternative to pdf-tools)
- *Required:* OPTIONAL (keybinding: 'z' in pdf-view-mode)
- *Install:* =sudo pacman -S zathura zathura-pdf-mupdf=

* LaTeX & Document Generation

** LaTeX Distribution
- *Package:* =texlive-core= (basic) or =texlive-most= (comprehensive)
- *Used by:* modules/latex-config.el, modules/org-export-config.el
- *Functionality:* LaTeX document compilation
- *Required:* OPTIONAL (only if using LaTeX)
- *Install:* =sudo pacman -S texlive-core= OR =sudo pacman -S texlive-most=
- *Commands:* =latexmk=, =pdflatex=, =xelatex=

** Pandoc - Universal Document Converter
- *Package:* =pandoc=
- *Used by:* modules/org-export-config.el, modules/mail-config.el
- *Functionality:* Convert between document formats (DOCX, EPUB, HTML, etc.)
- *Required:* OPTIONAL (enhances org-export capabilities)
- *Install:* =sudo pacman -S pandoc=

* Programming Language Support

** Language Servers (LSP)

*** Go
- *gopls* - =go install golang.org/x/tools/gopls@latest=
- *goimports* - =go install golang.org/x/tools/cmd/goimports@latest=
- *staticcheck* - =go install honnef.co/go/tools/cmd/staticcheck@latest=
- *delve* (debugger) - =go install github.com/go-delve/delve/cmd/dlv@latest=
- *Used by:* modules/prog-go.el
- *Required:* OPTIONAL (only if using Go development)

*** Python
- *python-lsp-server* - =pip install --user python-lsp-server[all]=
- *flake8* - =pip install --user flake8=
- *mypy* - =pip install --user mypy= (optional type checker)
- *Used by:* modules/prog-python.el
- *Required:* OPTIONAL (only if using Python development)
- *Note:* Install with =--user= flag (no sudo needed)

*** C/C++
- *clangd* - Provided by =clang= package
- *clang-format* - Provided by =clang= package
- *Package:* =clang=
- *Used by:* modules/prog-c.el
- *Install:* =sudo pacman -S clang=
- *Required:* OPTIONAL (only if using C/C++ development)

*** Bash
- *bash-language-server* - =npm install -g bash-language-server=
- *shellcheck* - =shellcheck= package (linter)
- *shfmt* - =shfmt= package (formatter)
- *Used by:* modules/prog-shell.el
- *Install:*
  #+BEGIN_SRC bash
  sudo pacman -S shellcheck shfmt nodejs npm
  npm install -g bash-language-server
  #+END_SRC
- *Required:* OPTIONAL (only if using shell script development)

*** JavaScript/TypeScript
- *typescript-language-server* - =npm install -g typescript-language-server=
- *eslint* - =npm install -g eslint= (optional linter)
- *prettier* - =npm install -g prettier= (optional formatter)
- *Used by:* modules/prog-lsp.el (detected via LSP mode hooks)
- *Required:* OPTIONAL (only if using JS/TS development)

** Build Tools
- *make* - Usually pre-installed
- *cmake* - For C/C++ projects: =sudo pacman -S cmake=
- *gcc/g++* - C/C++ compiler: =sudo pacman -S gcc=
- *gdb* - Debugger: =sudo pacman -S gdb=
- *Required:* OPTIONAL (per-language basis)

** Graphviz - Diagram Generation
- *Package:* =graphviz=
- *Used by:* modules/latex-config.el, modules/org-babel-config.el
- *Functionality:* Generate diagrams from dot files
- *Required:* OPTIONAL (only if using graphviz-dot-mode or org-babel dot blocks)
- *Install:* =sudo pacman -S graphviz=

* Search & File Management

** Ripgrep - Fast Search
- *Package:* =ripgrep=
- *Used by:* Implicit in many modern Emacs packages (consult, projectile, etc.)
- *Functionality:* Extremely fast code search
- *Required:* HIGHLY RECOMMENDED
- *Install:* =sudo pacman -S ripgrep=
- *Note:* Faster than grep, used by many completion frameworks

** fd - Fast Find
- *Package:* =fd=
- *Used by:* Implicit in modern completion frameworks
- *Functionality:* Fast file finding (alternative to GNU find)
- *Required:* RECOMMENDED
- *Install:* =sudo pacman -S fd=

** Deadgrep - Search Interface
- *Package:* Emacs package (uses ripgrep)
- *Used by:* modules/dirvish-config.el (keybinding: 'G')
- *Functionality:* Interactive ripgrep interface
- *Requires:* ripgrep (see above)

* Desktop Integration

** Desktop Notifications
- *Package:* =dunst= or =notification-daemon=
- *Used by:* modules/transcription-config.el, potentially others
- *Functionality:* Desktop notifications via =notify-send=
- *Required:* OPTIONAL (notifications will fail silently without it)
- *Install:* =sudo pacman -S dunst= (recommended)
- *Note:* Requires a notification daemon to be running

** xdg-utils - File Opening
- *Package:* =xdg-utils=
- *Provides:* =xdg-open= command
- *Used by:* modules/external-open.el, modules/dirvish-config.el
- *Functionality:* Open files with default applications
- *Required:* RECOMMENDED (fallback exists)
- *Install:* =sudo pacman -S xdg-utils=

** File Managers (Choose One - Optional)
- *Thunar* - =thunar=
- *Nautilus* - =nautilus=
- *Dolphin* - =dolphin=
- *PCManFM* - =pcmanfm=
- *Used by:* modules/dwim-shell-config.el
- *Functionality:* Open current directory in GUI file manager
- *Required:* OPTIONAL (choose one)
- *Install:* =sudo pacman -S thunar= (or your preferred file manager)

* Web Browsers

** Web Browsers (Choose One or More)
- *Chromium* - =chromium=
- *Google Chrome* - =google-chrome= (AUR)
- *Firefox* - =firefox=
- *Brave* - =brave-bin= (AUR)
- *Qutebrowser* - =qutebrowser=
- *Used by:* modules/browser-config.el
- *Functionality:* Opening web links
- *Required:* OPTIONAL (EWW built-in as fallback)
- *Install:* =sudo pacman -S firefox= (or your preferred browser)

* Network Utilities

** Curl - HTTP Client
- *Package:* =curl=
- *Used by:* scripts/oai-transcribe (OpenAI API calls), various other scripts
- *Functionality:* HTTP requests
- *Required:* Usually pre-installed, but verify
- *Install:* =sudo pacman -S curl=

* Emacs Build Dependencies (For Building from Source)

If using scripts/build-emacs.sh to build Emacs from source:

#+BEGIN_SRC bash
sudo pacman -S jansson tree-sitter imagemagick mailutils \
               harfbuzz cairo gnutls libxml2 texinfo gtk3 \
               libgccjit git base-devel
#+END_SRC

** Required for Native Compilation
- *libgccjit* - Enables native compilation of elisp files
- *Package:* =libgccjit=
- *Note:* Dramatically improves Emacs performance

* Summary by Feature Area

| Feature                | Required Packages              | Optional Packages                    |
|------------------------+--------------------------------+--------------------------------------|
| *Basic Emacs*          | git                            | ripgrep, fd                          |
| *Recording*            | ffmpeg, libpulse               | -                                    |
| *Transcription*        | curl (for API)                 | python-openai-whisper                |
| *Grammar*              | -                              | languagetool, aspell                 |
| *Email*                | mu, isync, msmtp               | -                                    |
| *Media*                | yt-dlp, task-spooler           | mpv, vlc                             |
| *PDF*                  | poppler                        | zathura                              |
| *LaTeX*                | -                              | texlive-core/most                    |
| *Documents*            | -                              | pandoc                               |
| *Notifications*        | -                              | dunst                                |
| *File Opening*         | -                              | xdg-utils                            |
| *C/C++*                | -                              | clang, gdb                           |
| *Python*               | -                              | python-lsp-server, flake8            |
| *Go*                   | -                              | gopls, goimports, delve              |
| *Shell*                | -                              | bash-language-server, shellcheck     |
| *Search*               | -                              | ripgrep (highly recommended)         |
| *Desktop Integration*  | -                              | xdg-utils, dunst                     |

* Installation Notes

** Package Manager Tips
1. *Python packages* install via =pip install --user= (no sudo needed)
2. *Go tools* install via =go install= (no system package manager)
3. *Node.js tools* install via =npm install -g= (requires =nodejs= package)
4. *AUR packages* require an AUR helper like =yay= or =paru=

** Special Considerations
- *Tree-sitter grammars* are downloaded automatically by treesit-auto (not in .localrepo)
- *Native compilation* requires libgccjit if building Emacs from source
- *Local package repository* (.localrepo) contains Emacs packages, not system dependencies

** Testing Installations
After installing dependencies, test key functionality:
#+BEGIN_SRC bash
# Test recording
emacs --eval "(require 'video-audio-recording)" --eval "(cj/recording-check-ffmpeg)"

# Test grammar checker
~/.emacs.d/scripts/languagetool-flycheck ~/.emacs.d/tests/fixtures/grammar-errors-basic.txt

# Test transcription wrapper (if using local whisper)
~/.emacs.d/scripts/local-whisper /path/to/audio.m4a

# Run Emacs test suite
cd ~/.emacs.d && make test
#+END_SRC

* Next Steps

** TODO Compare with archsetup script
- [ ] Analyze archsetup script to see which dependencies are already installed
- [ ] Identify gaps where Emacs dependencies are missing
- [ ] Ensure archsetup script installs all required dependencies
- [ ] Document any Emacs-specific configuration needed beyond package installation

** TODO Create dependency verification script
- [ ] Script to check which dependencies are installed
- [ ] Report missing optional dependencies by feature area
- [ ] Provide installation commands for missing dependencies

** TODO Add to documentation
- [ ] Link from main README
- [ ] Add to setup instructions
- [ ] Include in archsetup script comments