Repository: 6gk/fet.sh
Branch: master
Commit: c1e48e7fc704
Files: 3
Total size: 8.7 KB

Directory structure:
gitextract_r4ev_zn6/

├── LICENSE
├── README.md
└── fet.sh

================================================
FILE CONTENTS
================================================

================================================
FILE: LICENSE
================================================
Copyright 2020 Gauge Krahe

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.


================================================
FILE: README.md
================================================
<div align="center">
<h1>fet.sh</h1>
a fetch written in POSIX shell with no external commands
<br>
<img src="screenshot.png" width="250px">
</div>

### Installing
**Arch:** [fet.sh-git](https://aur.archlinux.org/packages/fet.sh-git) (AUR)  
**Gentoo:** [app-misc/fetsh](https://gpo.zugaina.org/Overlays/guru/app-misc/fetsh) (GURU overlay)  
**KISS:** [fetsh](https://github.com/kisslinux/community/tree/master/community/fetsh) (Community)  
**Nix:** [fet-sh](https://search.nixos.org/packages?show=fet-sh&query=fet-sh&channel=unstable) (nixpkgs-unstable)  
Alternatively, copy `fet.sh` to somewhere in $PATH and mark it as executable (`chmod +x fet.sh`)

### Customization
`fet.sh` has a few basic configuration options using environment variables, for example:
```
$ info='n os wm sh n' fet.sh
```
Supported options are:
- `accent` (0-7)
- `info`
- `separator`
- `colourblocks`

For less trivial configuration I recommend editing the script, I tried to keep it simple.

### Known Issues
MacOS, BSD, and Android don't show much info.


================================================
FILE: fet.sh
================================================
#!/bin/sh
#
#    fet.sh
#  a fetch in pure POSIX shell
#

# supress errors
exec 2>/dev/null
set --
eq() {  # equals  |  [ a = b ] with globbing
	case $1 in
		$2) ;;
		*) return 1;;
	esac
}

## DE
wm=$XDG_CURRENT_DESKTOP
[ "$wm" ] || wm=$DESKTOP_SESSION

## Distro
# freedesktop.org/software/systemd/man/os-release.html
# a common file that has variables about the distro
for os in /etc/os-release /usr/lib/os-release; do
	# some POSIX shells exit when trying to source a file that doesn't exist
	[ -f $os ] && . $os && break
done

if [ -e /proc/$$/comm ]; then
	## Terminal
	while [ ! "$term" ]; do
		# loop over lines in /proc/pid/status until it reaches PPid
		# then save that to a variable and exit the file
		while read -r line; do
			eq "$line" 'PPid*' && ppid=${line##*:?} && break
		done < "/proc/${ppid:-$PPID}/status"

		# Make sure not to do an infinite loop
		[ "$pppid" = "$ppid" ] && break
		pppid=$ppid

		# get name of binary
		read -r name < "/proc/$ppid/comm"

		case $name in
			*sh|"${0##*/}") ;;  # skip shells
			*[Ll]ogin*|*init|*systemd*) break;;  # exit when the top is reached
			# anything else can be assumed to be the terminal
			# this has the side affect of catching tmux, but tmux
			# detaches from the terminal and therefore ignoring that
			# will just make the init the term
			*) term=$name
		esac
	done

	## WM/DE
	[ "$wm" ] ||
		# loop over all processes and check the binary name
		for i in /proc/*/comm; do
			read -r c < "$i"
			case $c in
				*bar*|*rc) ;;
				awesome|xmonad*|qtile|sway|i3|[bfo]*box|*wm*) wm=${c%%-*}; break;;
			esac
		done

	## Memory
	# loop over lines in /proc/meminfo until it reaches MemTotal,
	# then convert the amount (second word) from KB to MB
	while read -r line; do
		eq "$line" 'MemTotal*' && set -- $line && break
	done < /proc/meminfo
	mem="$(( $2 / 1000 ))MB"

	## Processor
	while read -r line; do
		case $line in
			vendor_id*) vendor="${line##*: } ";;
			model\ name*) cpu=${line##*: }; break;;
		esac
	done < /proc/cpuinfo

	## Uptime
	# the simple math is shamefully stolen from aosync
	IFS=. read -r uptime _ < /proc/uptime
	d=$((uptime / 60 / 60 / 24))
	up=$(printf %02d:%02d $((uptime / 60 / 60 % 24)) $((uptime / 60 % 60)))
	[ "$d" -gt 0 ] && up="${d}d $up"

	## Kernel
	read -r _ _ version _ < /proc/version
	kernel=${version%%-*}
	eq "$version" '*Microsoft*' && ID="fake $ID"

	## Motherboard // laptop
	read -r model < /sys/devices/virtual/dmi/id/product_name
	# invalid model handling
	case $model in
		# alternate file with slightly different info
		# on my laptop it has the device model (instead of 'hp notebook')
		# on my desktop it has the extended motherboard model
		'System '*|'Default '*|'To Be Filled'*)
			read -r model < /sys/devices/virtual/dmi/id/board_name
	esac

	## Packages
	# clean environment, then make every file in the dir an argument,
	# then save the argument count to $pkgs
	set --
	# kiss, arch, debian, void, gentoo
	for i in '/var/db/kiss/installed/*'  '/var/lib/pacman/local/[0-9a-z]*' \
	'/var/lib/dpkg/info/*.list'  '/var/db/xbps/.*'  '/var/db/pkg/*/*'; do
		set -- $i
		[ $# -gt 1 ] && pkgs=$# && break
	done

	read -r host < /proc/sys/kernel/hostname
elif [ -f /var/run/dmesg.boot ]; then
	# Both OpenBSD and FreeBSD use this file, however they're formatted differently
	read -r bsd < /var/run/dmesg.boot
	case $bsd in
	Open*)
		## OpenBSD cpu/mem/name
		while read -r line; do
			case $line in
				'real mem'*)
					# use the pre-formatted value which is in brackets
					mem=${line##*\(}
					mem=${mem%\)*}
				;;
				# set $cpu to everything before a comma and after the field name
				cpu0:*)
					cpu=${line#cpu0: }
					# Remove excess info after the actual CPU name
					cpu=${cpu%%,*}
					# Set the CPU Manufacturer to the first word of the cpu
					# variable [separated by '(' or ' ']
					vendor=${cpu%%[\( ]*}
					# We got all the info we want, stop reading
					break
				;;
				# First 2 words in the file are OpenBSD <version>
				*) [ "$ID" ] || { set -- $line; ID="$1 $2"; }
			esac
		done < /var/run/dmesg.boot
		[ -d /var/db/pkg ] && set -- /var/db/pkg/* && pkgs=$#
		read -r host < /etc/myname
		host=${host%.*}
	;;
	# Everything else, assume FreeBSD (first line is ---<<BOOT>> or something)
	*)
		# shellcheck source=/dev/null
		. /etc/rc.conf
		# shut shellcheck up without disabling the warning
		host=${hostname:-}

		while read -r line; do
			case $line in
				# os version
				FreeBSD*)
					# If the OS is already set, no need to set it again
					[ "$ID" ] && continue
					ID=${line%%-R*}
				;;

				CPU:*)
					cpu=${cpu#CPU: }
					# Remove excess info from after the actual CPU name
					cpu=${line%\(*}
				;;
				*Origin=*)
					# CPU Manufacturer
					vendor=${line#*Origin=\"}
					vendor="${vendor%%\"*} "
				;;

				'real memory'*)
					# Get the pre-formatted amount which is inside brackets
					mem=${line##*\(}
					mem=${mem%\)*}
					# This appears to be the final thing we need from the file,
					# no need to read it more.
					break
			esac
		done < /var/run/dmesg.boot
	;;
	esac
elif v=/System/Library/CoreServices/SystemVersion.plist; [ -f "$v" ]; then
	## Macos
	# make sure this variable is empty as to not break the following loop
	temp=
	while read -r line; do
		case $line in
			# set a variable so the script knows it's on the correct line
			# (the line after this one is the important one)
			*ProductVersion*) temp=.;;
			*)
				# check if the script is reading the derired line, if not
				# don't do anything
				[ "$temp" ] || continue
				# Remove everything before and including the first '>'
				ID=${line#*>}
				# Remove the other side of the XML tag, and insert the actual OS name
				ID="MacOS ${ID%<*}"
				# We got the info we want, end the loop.
				break
		esac
	done < "$v"
fi

eq "$0" '*fetish' && printf 'Step on me daddy\n' && exit

# help i dont know if it's a capital consistently
eq "$wm" '*[Gg][Nn][Oo][Mm][Ee]*' && wm='foot DE'

## GTK
while read -r line; do
	eq "$line" 'gtk-theme*' && gtk=${line##*=} && break
done < "${XDG_CONFIG_HOME:=$HOME/.config}/gtk-3.0/settings.ini"

# Shorten $cpu and $vendor
# this is so messy due to so many inconsistencies in the model names
vendor=${vendor##*Authentic}
vendor=${vendor##*Genuine}
cpu=${cpu##*) }
cpu=${cpu%% @*}
cpu=${cpu%% CPU}
cpu=${cpu##CPU }
cpu=${cpu##*AMD }
cpu=${cpu%% with*}
cpu=${cpu% *-Core*}

col() {
	printf '  '
	for i in 1 2 3 4 5 6; do
		printf '\033[9%sm%s' "$i" "${colourblocks:-▅▅}"
	done
	printf '\033[0m\n'
}

print() {
	[ "$2" ] && printf '\033[9%sm%6s\033[0m%b%s\n' \
		"${accent:-4}" "$1" "${separator:- ~ }" "$2"
}

# default value
: "${info:=n user os sh wm up gtk cpu mem host kern pkgs term col n}"

for i in $info; do
	case $i in
		n) echo;;
		os) print os "$ID";;
		sh) print sh "${SHELL##*/}";;
		wm) print wm "${wm##*/}";;
		up) print up "$up";;
		gtk) print gtk "${gtk# }";;
		cpu) print cpu "$vendor$cpu";;
		mem) print mem "$mem";;
		host) print host "$model";;
		kern) print kern "$kernel";;
		pkgs) print pkgs "$pkgs";;
		term) print term "$term";;
		user) printf '%7s@%s\n' "$USER" "$host";;
		col) col;;
	esac
done