25 KiB
Fish config
- Presentation
- Fish from within Emacs
- Tramp remote access
- Regular fish shell appearance
- Global variables
- Abbreviations
- Last thing before we’re done
Presentation
The file present in ~/.config/fish/config.fish
is the configuration file for
the fish shell. It contains custom functions, environment variables and
abbreviations.
Just in case, we might need sometimes to declare the fish function fish_title
as true
, so let’s do so.
function fish_title
true
end
Fish from within Emacs
I sometimes call fish from within emacs, with M-x ansi-term
. In this case, the
variable TERM
needs to have the value eterm-color
.
if test -n "$EMACS"
set -x TERM eterm-color
end
Tramp remote access
When accessing from a remote machine our computer from Emacs, tramp needs a
precise shell appearance: a simple $
followed by a space after which to put
the commands it needs to execute, and nothing else. Due to this, let’s
deactivate and redefine some of the functions defining the appearance of fish.
if test "$TERM" = "dumb"
function fish_prompt
echo "\$ "
end
function fish_right_prompt; end
function fish_greeting; end
function fish_title; end
end
Regular fish shell appearance
Now, there is only one function I modify when it comes to the appearance of fish
when I’m the one using it: the fish_greeting
function. I use it to give me an
overview of my computer’s status, including its hostname, uptime, disks usage,
ram usage, swap usage, and networking.
set RED '\033[0;31m'
set GREEN '\033[0;32m'
set NC '\033[0m'
function display_slider # used total
set -l slider_length 38
set -l used $argv[1]
set -l total $argv[2]
set -l used_slider (math -s0 "($used * $slider_length) / $total")
set -l unused_slider (math -s0 "$slider_length - $used_slider")
echo -en "["
echo -en $RED
echo -en (string repeat -n $used_slider '=')
echo -en $GREEN
echo -en (string repeat -n $unused_slider '=')
echo -en $NC
echo -en "]"
end
function fish_greeting
set -l ruler_length 79
set -l ruler (string repeat -n $ruler_length "=")
set -l osname (cat /etc/os-release | grep -i pretty_name | sed 's/.*"\(.*\)".*/\1/')
set -l uptime (uptime -p | sed 's/up //')
set -l root (df -Ph | grep -E "/\$")
set -l root_p (echo $root | awk '{print $5}' | tr -d '%')
set -l root_used (echo $root | awk '{print $3}')
set -l root_total (echo $root | awk '{print $2}')
set -l ram (free -tm | grep Mem)
set -l ram_total (echo $ram | awk '{print $2}')
set -l ram_used (echo $ram | awk '{print $3}')
set -l ram_p (math -s0 "$ram_used / $ram_total * 100")
set -l swap (free -tm | grep Swap)
set -l swap_total (echo $swap | awk '{print $2}')
set -l swap_used (echo $swap | awk '{print $3}')
set -l swap_p (math -s0 "$swap_used / $swap_total * 100")
set -l connections (nmcli c s | grep -E "wifi|ethernet" | grep -v '\-\-')
set -l wifi (echo $connections | grep "wifi" | awk '{print $1}')
set -l ethernet (test "$connections" = "*ethernet*" && echo -e $GREEN"UP"$NC || echo -e $RED"DOWN"$NC)
set -l wifi (test -n wifi && echo -e $GREEN$wifi$NC || echo - $RED"DOWN"$NC)
echo $ruler
printf "OS......: %-30sKernel: %s %s\n" $osname (uname -s) (uname -r)
printf "Hostname: %-30sUptime: %s\n" (hostname) $uptime
printf "Ethernet: %-41sWifi..: %s\n" $ethernet $wifi
printf "Disks...: %-6s %s %6s / %6s (%2d%%)\n" "/" (display_slider $root_p 100) $root_used $root_total $root_p
# loop other mountpoints
for mp in (df -Ph 2> /dev/null | egrep "sd|tank|nvme" | egrep -v "boot|/\$")
set -l mp_p (echo $mp | awk '{print $5}' | tr -d '%')
set -l mp_used (echo $mp | awk '{print $3}')
set -l mp_total (echo $mp | awk '{print $2}')
set -l mp_name (echo $mp | awk '{print $6}')
printf " %-6s %s %6s / %6s (%2d%%)\n" $mp_name (display_slider $mp_p 100) $mp_used $mp_total $mp_p
end
printf "Ram.....: %s %5dM / %5dM (%2d%%)\n" (display_slider $ram_used $ram_total) $ram_used $ram_total $ram_p
printf "Swap....: %s %5dM / %5dM (%2d%%)\n" (display_slider $swap_used $swap_total) $swap_used $swap_total $swap_p
echo $ruler
end
The theme I use for fish is bobthefish, which by default puts a really long
timestamp to the right of the prompt. I want something shorter, so here is the
variable to set, using the format specified in date(1)
.
set -g theme_date_format "+%g-%m-%d %H:%M:%S"
I also wish to have a kinda different newline prompt, so let’s set it:
set -g theme_newline_prompt 'λ '
Finally, let’s set our prompt’s theme to the Nord theme.
set -g theme_color_scheme nord
Global variables
In order to keep some other code clean, I set the $BROWSER
variable so I don’t
have to call my web browser directly but rather with this variable.
set -gx BROWSER firefox
Sometimes, software will rely on SUDO_ASKPASS
to get a GUI from which it can
get the sudo password. So, let’s declare it.
set -gx SUDO_ASKPASS ~/.local/bin/askpass
In general, I prefer using bat
to less
, although the former relies on the
latter, but bat
provides nice wrapping around less
, including syntax
highlighting. Let’s set the manpager to bat then:
set -x MANPAGER "sh -c 'col -bx | bat -l man -p'"
Development
Now, let’s declare our editor of choice, EmacsClient; not Emacs itself since it
will most often be just quick edits, nothing too heavy, if it is called from the
EDITOR
variable (from Git, for example), or from the VISUAL
variable.
set -gx EDITOR emacsclient -c
set -gx VISUAL emacsclient -c
We also need to set the path to the Dart SDK.
set -gx DART_SDK /opt/dart-sdk/bin
And we also need to specify where the Android SDK it located.
set -gx ANDROID_HOME $HOME/Android/Sdk
Still related to Dart and Flutter development,
set -gx CHROME_EXECUTABLE /usr/bin/chromium
Next, we have two variables from Deno, the Node.js destroyer. Its base directory will be set in my XDG config directory, and its binaries will be located in my local binaries directory (see below).
set -gx DENO_DIR $HOME/.config/deno
set -gx DENO_INSTALL_ROOT $HOME/.local/bin/deno
Finally, some development packages require the PKG_CONFIG_PATH
to be set, so
let’s do so.
set -gx PKG_CONFIG_PATH /usr/local/lib/pkgconfig/ $PKG_CONFIG_PATH
$PATH
A variable available with the fish shell is fish_user_paths
which lists custom
paths to binaries specified by the user. Using this variable ensures they are
included in the $PATH
variable only once without the need to set it directly.
For instance, my PATH
variable needs Rust’s Cargo’s binaries, Go’s binaries,
my own executables, and some more.
additional path | what it leads to |
---|---|
$HOME/.pub-cache/bin | Dart binaries and executables |
$HOME/.local/bin | Custom executables, see /phundrak/dotfiles/src/commit/e366559d0f9c1c99348c4109d372684b902ed18b/org/config/bin.org |
$HOME/go/bin | Go binaries and executables |
$HOME/.cargo/bin | Rust binaries and executables |
$HOME/.gem/ruby/2.6.0/bin | Ruby binaries and executables |
$HOME/.cabal/bin | Haskel binaries |
$HOME/.pub-cache/bin \ $HOME/.local/bin \ $HOME/go/bin \ $HOME/.cargo/bin \ $HOME/.gem/ruby/2.6.0/bin \ $HOME/.cabal/bin
So, let’s set our user paths:
set -g fish_user_paths \
<<generate-extra-paths()>>
Abbreviations
Abbreviations are a great way to keep correctly track of which commands are run
in the shell without polluting the history of the shell with obscure commands.
When typing an abbreviation, fish will replace it with replace it with its
expanded equivalent. Below are some of the abbreviations I use. Be aware some of
them that invoke GUI programs can be invoked through devour
which will make
the terminal disappear while the program runs, and once the GUI program exists
the terminal window will come back.
System monitoring
Here I have some abbreviations which are quite useful when performing some
system monitoring. With df
, we can get an overview of our filesystem usage,
while with diskspace
we get some more precise information. meminfo
is a call
to free
with sane defaults, and similar to meminfo
, we also have
gpumeminfo
so we can get a quick look at the memory-related logs of our X
session. I also declared cpuinfo
an alias of lscpu
in order to keep
consistent with meminfo
. pscpu
gives us information on what the CPU is
running right now, and pscpu10
limits that to the top 10 threads. Similarly,
psmem
gives us information on the memory usage of the current threads, and
psmem10
only the ten most important threads in terms of memory usage.
abbreviation | command |
---|---|
df | df -H |
diskspace | sudo df -h | grep -E "sd|lv|Size" |
du | du -ch |
meminfo | free -m -l -t |
gpumeminfo | grep -i –color memory /var/log/Xorg.0.log |
cpuinfo | lscpu |
pscpu | ps auxf | sort -nr -k 3 |
pscpu10 | ps auxf | sort -nr -k 3 | head -10 |
psmem | ps auxf | sort -nr -k 4 |
psmem10 | ps auxf | sort -nr -k 4 | head -10 |
<<generate-abbr(table=mgmt-abbr)>>
System management (packages and services)
I added some of these abbreviations due to how often I have to write the whole thing.
Package management
The first command is remove
which removes a package from my system, as well as
its dependencies no longer needed. p
. pacman
's or paru
's. This is why I
simply type purge
. And if I want to simply seach among the pacman
repos, I
can type search
. Otherwise, if I want to include AUR results, I’ll use paru
.
abbreviation | command |
---|---|
remove | sudo pacman -Rsc |
purge | paru -Sc |
<<generate-abbr(table=pm-abbr)>>
Service management
I don’t have the muscle memory of systemctl
. So instead, I simply type c
when I want to do something user service related. And if I want to manipulate
system services, I can instead type a simple capital S
.
abbreviation | command |
---|---|
s | systemctl |
suser | systemctl –user |
<<generate-abbr(table=service-abbr)>>
Development
A good amount of these commands are development related, especially when it comes to compilation or Docker.
CMake
I have the following abbreviations so I can quickly run CMake and create a configuration for debug or release profiles.
abbreviation | command |
---|---|
cdebug | cmake -DCMAKE_BUILD_TYPE=Debug |
crelease | cmake -DCMAKE_BUILD_TYPE=Release |
Here is the corresponding fish configuration:
<<generate-abbr(table=abbr-cmake)>>
Docker
And of course, when it comes to Docker Compose, I don't have time to write the full command, so I use these instead.
abbreviation | command |
---|---|
dc | docker-compose |
dcb | docker-compose build |
dcd | docker-compose down |
dcl | docker-compose logs |
dcp | docker-compose pull |
dcr | docker-compose run –rm |
dcu | docker-compose up |
dcub | docker-compose up –build |
dcud | docker-compose up -d |
dcudb | docker-compose up -d –build |
Here is the corresponding fish configuration:
<<generate-abbr(table=abbr-docker)>>
Text editors
I greatly prefer to use Emacsclient as my main text editor; Emacs has basically
all I need. So, it's only normal I have an abbreviation to launch a new instance
of it. If launched in the terminal, I’ll usually want Emacs to be displayed in
CLI mode and not in GUI mode, otherwise I would invoke it with my WM’s shortcut.
In case we want to launch Emacs in GUI mode anyways, egui
is available too.
abbreviation | command |
---|---|
e | emacsclient -c -nw |
egui | devour emacsclient -c |
Here is the corresponding fish configuration:
<<generate-abbr(table=abbr-text-ed)>>
Compilation
By default, I set clang
, clang++
, gcc
and g++
to the latest standard and
with the -Wall
flag activated.
abbreviation | command |
---|---|
clang | clang -Wall |
clang++ | clang++ -Wall |
g++ | g++ -Wall -std=c++20 |
gcc | gcc -Wall -std=c18 |
Here is the corresponding fish configuration:
<<generate-abbr(table=abbr-comp)>>
Git
And let's face it: we all at one point just wanted to commit our code without thinking about the message, to just get over with it. Don't worry, I got you covered.
abbreviation | command |
---|---|
randcommit | git commit -m (curl -s whatthecommit.com/index.txt) |
Here is the corresponding fish configuration:
<<generate-abbr(table=abbr-git)>>
LaTeX
Yes, although I use org-mode, I still have some use for LaTeX, especially when
it comes to PDF exports of my org files. Hence why I use the LaTeX package
manager. It is recommended to use tllocalmgr
instead of tlmgr
, but I can
never remember the command, and the latter is faster to type, so time for an
abbreviation. Same goes for texhash
which must be run as sudo.
abbreviation | command |
---|---|
tlmgr | tllocalmgr |
texhash | sudo texhash |
Here is the corresponding fish configuration:
<<generate-abbr(table=latex-abbr)>>
Some security measures
Some commands can be quite dangerous when not used properly, which is why I
added default flags and options so I can get warnings before things get ugly.
The -i
and -I
add prompts in case we might not want to do what we asked the
shell to do. Notice lns
which creates symlinks, rmd
which removes
directories, rmf
which forces deletion, and rmdf
which forces the delition
of a directory. Notice also the --preserve-root
which will prevent me from
accidentally removing the root folder. I added the same option to chgrp
,
chmod
, and chown
.
abbreviation | command |
---|---|
cp | cp -i |
ln | ln -i |
lns | ln -si |
mv | mv -i |
rm | rm -Iv |
rmd | rm –preserve-root -Irv |
rmdf | rm –preserve-root -Irfv |
rmf | rm –preserve-root -Ifv |
chgrp | chgrp –preserve-root -v |
chmod | chmod –preserve-root -v |
chown | chown –preserve-root -v |
Here is the corresponding fish configuration:
<<generate-abbr(table=sec-abbr)>>
Typos
Let's admit it, we all make typos from time to time in the shell, and some are
recurrent enough we make abbreviations or aliases of the correct command. Well,
I have some of my abbreviations which were make exactly because of this.
Sometimes for some reasons, my brain makes me write clean
instead of clear
.
So, let's just replace the former by the latter. I'm also very bad at typing
exit
. And sometimes I suck at typing htop
.
abbreviation | command |
---|---|
clean | clear |
exi | exit |
exti | exit |
hotp | htop |
Here is the corresponding fish configuration:
<<generate-abbr(table=typo-abbr)>>
Misc
Finally, some miscellaneous abbreviations that don't really fit into any of the above categories.
Media
Here you will find various commands related to media in general. the first one is a command to play some chillhop from the Chillhop YouTube channel's livestream.
abbr chill 'mpv --force-window=no --no-video "https://www.youtube.com/user/Chillhopdotcom/live" &'
When it comes to mpv, I do not want to force it to open a graphical window if for example I want to listen to an audio file. I also do not want any border on that window. So, I declared this abbreviation.
abbr mpv 'devour mpv --no-border --force-window=no'
When I want to download a song from YouTube, I'll just use the command flac
videoIdentifier
to get it through youtube-dl
.
abbr flac 'youtube-dl -x --audio-format flac --audio-quality 0 -o "~/Music/%(uploader)s/%(title)s.%(ext)s"'
Some sane default options for sxiv
, a simple X image Viewer. This includes
playing GIFs and not displaying the filename below. Sxiv will also open in
fullscreen and will fit the displayed image to the frame.
abbr sxiv 'sxiv -abfs f'
Finally, let's declare the following abbreviation that will launch an mpv instance displaying my webcam:
abbr webcam 'devour mpv --demuxer-lavf-format=video4linux2 --demuxer-lavf-o-set=input_format=mjpeg av://v4l2:/dev/video0'
Sudo
First, I make it so that sudo
comes with the -A
switch in order to call my
custom graphical script for getting my password (see askpass). I also made it so
please
is an equivalent to sudo -A
as a joke.
abbr please 'sudo -A'
History
I find it more intuitive and faster to just write hist
instead of history
,
so let's declare that.
abbr hist history
Compression
It seems it's just like many other people, but I cannot for the life of me
remember the syntax of tar
. So, I made the following abbreviations, and one
day hopefully, after seeing the abbreviations' expansion over and over I'll
remember the command like I did for the abbreviation of remove
(see Package
management).
abbreviation | command |
---|---|
compress | tar -czf |
untar | tar -xvzf |
<<generate-abbr(table=tar-abbr)>>
exa
abbreviation | command |
---|---|
exa | exa -halg@ –group-directories-first –git |
lsl | exa -halg@ –group-directories-first –git |
<<generate-abbr(table=exa-abbr)>>
Network Management
First, we have just nmcli
with sane default options, that is a pretty output
with colors.
abbr nmcli 'nmcli -p -c auto'
NordVPN
Next, we have some NordVPN-related shortcuts. The first one is a simple
abbreviation to nordvpn
. The second one is a shortcut to connect to a server,
and to disconnect from the current server. I also have a couple of shortcuts to
quickly connect to some preselected countries, mainly France, Germany, Japan and
the US.
abbreviation | command |
---|---|
n | nordvpn |
nc | nordvpn c |
nd | nordvpn d |
ncf | nordvpn c France |
ncg | nordvpn c Germany |
ncj | nordvpn c Japan |
ncu | nordvpn c United_States |
<<generate-abbr(table=nordvpn-abbr)>>
Wget
By default, continue a download that was interupted.
abbr wget 'wget -c'
Last thing before we’re done
For some reason, Fish began searching for packages when I enter a command name
wrong. For instance, if I type vim
, I get something like this:
$ vim
fish: Unknown command: vim
usr/bin/vim is owned by extra/gvim 8.2.2653-1
usr/bin/vim is owned by extra/vim 8.2.2653-1
But I don’t want that, it slows down my shell. So, in order to fix that, we need the following lines:
function fish_command_not_found
__fish_default_command_not_found_handler $argv
end
Tadah! No more package suggestions from fish!