A short description of the functions

Functions with dependencies on non-standard installed tools (on macOS 10.14)

function	depends on	which is installed by
build_iosevka	nodejs, ttfautohint & otfcc	brew
chosts	dateutils & wget	brew
fixdate	SetFile *	Xcode
fixmp4metadata	AtomicParsley	brew
mans	ripgrep	brew
mdb	tag	brew
mwp_status	dateutils	brew
npodl & vidl	youtube-dl	brew
testmovies	mediainfo	brew
tv	video_transcoding	gem

* From its local manpage:
Tools supporting Carbon development, including /usr/bin/SetFile, were deprecated with Xcode 6.

Note: Its local documentation says it is deprecated, but for now it works.
On Apple's site it is in the Retired Documents Library referencing Xcode 5.
With Xcode 10 it still gets installed.

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In alphabetical order

• ag
  Change the colors of ag (the silver searcher) output. I don't like the yellow boxes that show up in the default settings. Changed to green underlined matches, light yellow pathnames & light blue line numbers.

• apply_settings
  Set up fish universal variables. At the moment all color related.
  I'm using a customized SpaceGray theme. The standard colors fish comes with don't work very well with this theme. When I set up a Mac this function makes it easy to apply the colors that I found to be working best for me. It has taken an inordinate amount of time to get to these, so it's important to preserve them even if this function is never called again during the computers lifetime.

• brdeps
  Print a list of brew installed tools and their dependencies.
  Takes optional arguments, if there are none it will display a list of all installed tools.
  Output:
  tool_name depends on: some_other_tool(s)

• brused
  Print a list of brew installed tools and which other tools use this.
  Takes optional arguments, if there are none it will display a list of all installed tools.
  Output:
  tool_name used by: some_other_tool(s)

• build_iosevka
  A script to build a custom version of the Iosevka font.

• bup
  Three consecutive commands to keep homebrew up to date and lean.
  brew update, brew upgrade and finally brew cleanup.
  This will update everything that is installed via a brew command for which a newer version is available.

• cdl
  Change to a directory and list its contents with a long listing.

• chosts
  Compare the local date with the date on the net for my hosts file and see if it's behind.

• cleands
  Recursively delete ".DS_Store" files

• cleanLaunchServices
  Clean up LaunchServices to remove duplicates in the "Open With" menu.

• cpuhogs
  Find what's hogging the CPU. Kinda like a Top 10 list.

• decrypt
  Decrypt a file.

• domaininfo
  Get information for a FQDN (fully qualified domain name). It's a wrapper around dig, ipinfo.io & a whois query.
  I used this to block Facebook, after reading this blogpost. Useful to block tracking servers or other pests on the internet.

• down4me
  Checks whether a website is down just for you, or everybody.

• emptytrash
  Empty the Trash on all mounted volumes and the main HDD.
  Also, clear Apple’s System Logs (asl) to improve shell startup speed.

• encrypt
  Encrypt a file.

• extract
  Extract the given archive into a folder.

• fish_some_function functions for the shell's own use.

  • fish_command_timer (within conf.d).
    Time stamp & command execution time at the right hand side of the terminal.
    Copied from jichu4n and slightly adapted

  • fish_greeting
    Displays OS & uptime.

  • fish_prompt
    Prompt line with git info.

• fixdate
  Extract dates from filenames and put those in the date created & modified metadata.

• fixmp4metadata
  Fixes titles and clears comments for mp4 files and then calls fixdate function to fix the dates.

• free
  Emulates the free function from Linux.
  Shows free & used memory in human readable format.

• fzf
  The famous fzf (fuzzy finder) is also present here, with some keybindings files. fish_user_key_bindings.fish and a sym-linked file fzf_key_bindings.fish.

• getnet
  Get network information.
  I don't use this anymore because newer Mac's may not have a physical Ethernet port.
  Replacement is netinfo.

• git_helpers (within conf.d).
  get a nice git log output with colors and in neat columns.
  A reconstruction of Gary Bernhardt's githelpers.sh script & his .gitconfig aliases.
  This is how it looks:
  
  and a bit more interesting
  

• hosts
  Open the hosts file in my favorite editor.

• img_size
  Find out the dimensions of an image.

• lmas
  List all applications that were downloaded from the Mac App Store.

• mans
  Search for something in a man page.
  mans manpage searchterm
  Displays paginated result with colored search terms and seven lines surrounding each hit.

• mdb
  A script to create a simple plain text movie database.

• mwp_status
  Check Apple's malware protection status.
  It shows version number & date/time last updated of:

  • XProtect
  • Gatekeeper
  • SIP
  • MRT
  • CoreSuggest
  • IncompatibelKernelExt
  • CoreLSDK

  and SIP status disabled or enabled

• netinfo
  Get network information.
  The successor of getnet.fish.
  Works on Mac's without a physical Ethernet port. See in the comments.

• npodl
  Download a video with youtube-dl with predefined setting.

• nvimrc
  Open the init.vim file.

• print_fish_colors
  Prints a table of colors used by fish.

• prompt_git_status
  Helper function for fish_prompt.

• restore_original_fish_colors
  Like it says on the tin.

• source_script
  Source sh/csh file. Seems useful, but I can't remember if I ever used it.

• testmovies
  A script to extract the height of movie files in a directory & if it's over 720 put their names in a file for further processing with Don Melton's video transcoding tools.

• totrash
  Move a specified file to the Trash.

• tv
  Transcode a video to 720p & add dutch subtitles if available. Uses Don Melton's video transcoding tools.

• updhosts
  Update my /private/etc/hosts file from four different online sources and append my personal blocklist to it.
  Then flush the DNS cache to make the changes take effect.
  All to block ads & malware sites, trackers and other annoyances like facebook & co.

• vimrc
  Open the .vimrc file.

• vidl
  Download a video with youtube-dl with predefined setting.

• weer
  The weather forecast for a city. Type in city,country (case insensitive) as arguments.

• z
  z lets you jump around directories. It learns while you cd to directories and scores how often you go to a particular directory. It uses that info to decide where to go. You don't have to be precise with dir-names, it does some sort of fuzzy finding.
  The z command lives in conf.d & sets up the whole system. Inside functions there are __z* files that perform various actions. The last file of this is the uninstall.fish which removes the files that z creates.

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I've tried to attribute the people from whom I stole some code.
If you feel that I have missed something, open an Issue here. Also if you find bugs, ditto.