828 lines
23 KiB
Bash
Executable File
828 lines
23 KiB
Bash
Executable File
#!/bin/sh
|
||
#
|
||
# pfetch - Simple POSIX sh fetch script.
|
||
|
||
log() {
|
||
# The 'log()' function handles the printing of information.
|
||
# In 'pfetch' (and 'neofetch'!) the printing of the ascii art and info
|
||
# happen independently of each other.
|
||
#
|
||
# The size of the ascii art is stored and the ascii is printed first.
|
||
# Once the ascii is printed, the cursor is located right below the art
|
||
# (See marker $[1]).
|
||
#
|
||
# Using the stored ascii size, the cursor is then moved to marker $[2].
|
||
# This is simply a cursor up escape sequence using the "height" of the
|
||
# ascii art.
|
||
#
|
||
# 'log()' then moves the cursor to the right the "width" of the ascii art
|
||
# with an additional amount of padding to add a gap between the art and
|
||
# the information (See marker $[3]).
|
||
#
|
||
# When 'log()' has executed, the cursor is then located at marker $[4].
|
||
# When 'log()' is run a second time, the next line of information is
|
||
# printed, moving the cursor to marker $[5].
|
||
#
|
||
# Markers $[4] and $[5] repeat all the way down through the ascii art
|
||
# until there is no more information left to print.
|
||
#
|
||
# Every time 'log()' is called the script keeps track of how many lines
|
||
# were printed. When printing is complete the cursor is then manually
|
||
# placed below the information and the art according to the "heights"
|
||
# of both.
|
||
#
|
||
# The math is simple: move cursor down $((ascii_height - info_height)).
|
||
# If the aim is to move the cursor from marker $[5] to marker $[6],
|
||
# plus the ascii height is 8 while the info height is 2 it'd be a move
|
||
# of 6 lines downwards.
|
||
#
|
||
# However, if the information printed is "taller" (takes up more lines)
|
||
# than the ascii art, the cursor isn't moved at all!
|
||
#
|
||
# Once the cursor is at marker $[6], the script exits. This is the gist
|
||
# of how this "dynamic" printing and layout works.
|
||
#
|
||
# This method allows ascii art to be stored without markers for info
|
||
# and it allows for easy swapping of info order and amount.
|
||
#
|
||
# $[2] ___ $[3] goldie@KISS
|
||
# $[4](.· | $[5] os KISS Linux
|
||
# (<> |
|
||
# / __ \
|
||
# ( / \ /|
|
||
# _/\ __)/_)
|
||
# \/-____\/
|
||
# $[1]
|
||
#
|
||
# $[6] /home/goldie $
|
||
|
||
# Move the cursor to the right, the width of the ascii art with an
|
||
# additional gap for text spacing.
|
||
printf '[%sC' "${ascii_width--1}"
|
||
|
||
# Print the info name and color the text.
|
||
printf '[3%s;1m%s[m' "${PF_COL1-4}" "$1"
|
||
|
||
# Print the info name and info data separator.
|
||
printf '%s' "$PF_SEP"
|
||
|
||
# Move the cursor backward the length of the *current* info name and
|
||
# then move it forwards the length of the *longest* info name. This
|
||
# aligns each info data line.
|
||
printf '[%sD[%sC' "${#1}" "${PF_ALIGN-$info_length}"
|
||
|
||
# Print the info data, color it and strip all leading whitespace
|
||
# from the string.
|
||
printf '[3%sm%s[m\n' "${PF_COL2-7}" "${2#${2%%[![:space:]]*}}"
|
||
|
||
# Keep track of the number of times 'log()' has been run.
|
||
: $((info_height+=1))
|
||
}
|
||
|
||
get_title() {
|
||
# Username is retrieved by first checking '$USER' with a fallback
|
||
# to the 'whoami' command.
|
||
user=${USER:-$(whoami)}
|
||
|
||
# Hostname is retrieved by first checking '$HOSTNAME' with a fallback
|
||
# to the 'hostname' command.
|
||
#
|
||
# Disable the warning about '$HOSTNAME' being undefined in POSIX sh as
|
||
# the intention for using it is allowing the user to overwrite the
|
||
# value on invocation.
|
||
# shellcheck disable=SC2039
|
||
host=${HOSTNAME:-${hostname:-$(hostname)}}
|
||
|
||
log "[3${PF_COL3:-1}m${user}${c7}@[3${PF_COL3:-1}m${host}"
|
||
}
|
||
|
||
get_os() {
|
||
# This function is called twice, once to detect the distribution name
|
||
# for the purposes of picking an ascii art early and secondly to display
|
||
# the distribution name in the info output (if enabled).
|
||
#
|
||
# On first run, this function displays _nothing_, only on the second
|
||
# invocation is 'log()' called.
|
||
[ "$distro" ] && {
|
||
log os "$distro"
|
||
return
|
||
}
|
||
|
||
case $os in
|
||
Linux*)
|
||
# Disable warning about shellcheck not being able
|
||
# to read '/etc/os-release'. This is fine.
|
||
# shellcheck source=/dev/null
|
||
. /etc/os-release && distro=$PRETTY_NAME
|
||
|
||
# Special cases for distributions which don't follow.
|
||
# the '/etc/os-release' "standard".
|
||
command -v crux >/dev/null && distro=$(crux)
|
||
command -v guix >/dev/null && distro='Guix System'
|
||
;;
|
||
|
||
Darwin*)
|
||
# TODO: Parse '/System/Library/CoreServices/SystemVersion.plist'
|
||
# to grab the full distribution name, version and build.
|
||
distro=macOS
|
||
;;
|
||
|
||
*)
|
||
# Catch all to ensure '$distro' is never blank.
|
||
# This also handles the BSDs.
|
||
distro="$os $kernel"
|
||
;;
|
||
esac
|
||
}
|
||
|
||
get_kernel() {
|
||
# '$kernel' is the cached output of 'uname -r'.
|
||
case $os in
|
||
# Don't print kernel output on BSD systems as the
|
||
# OS name includes it.
|
||
*BSD*) ;;
|
||
|
||
*)
|
||
log kernel "$kernel"
|
||
;;
|
||
esac
|
||
}
|
||
|
||
get_shell() {
|
||
log shell "${SHELL##*/}"
|
||
}
|
||
|
||
get_host() {
|
||
case $os in
|
||
Linux*)
|
||
# Despite what these files are called, version doesn't
|
||
# always contain the version nor does name always contain
|
||
# the name.
|
||
read -r name < /sys/devices/virtual/dmi/id/product_name
|
||
read -r version < /sys/devices/virtual/dmi/id/product_version
|
||
read -r model < /sys/firmware/devicetree/base/model
|
||
|
||
host="$name $version $model"
|
||
;;
|
||
|
||
Darwin*)
|
||
host=$(sysctl -n hw.model)
|
||
;;
|
||
|
||
*BSD*)
|
||
host=$(sysctl -n hw.vendor hw.product)
|
||
;;
|
||
esac
|
||
|
||
log host "$host"
|
||
}
|
||
|
||
get_uptime() {
|
||
# Uptime works by retrieving the data in total seconds and then
|
||
# converting that data into days, hours and minutes using simple
|
||
# math.
|
||
case $os in
|
||
Linux*)
|
||
IFS=. read -r s _ < /proc/uptime
|
||
;;
|
||
|
||
Darwin*|*BSD*)
|
||
s=$(sysctl -n kern.boottime)
|
||
|
||
# Extract the uptime in seconds from the following output:
|
||
# [...] { sec = 1271934886, usec = 667779 } Thu Apr 22 12:14:46 2010
|
||
s=${s#*=}
|
||
s=${s%,*}
|
||
|
||
# The uptime format from 'sysctl' needs to be subtracted from
|
||
# the current time in seconds.
|
||
s=$(($(date +%s) - s))
|
||
;;
|
||
esac
|
||
|
||
# Convert the uptime from seconds into days, hours and minutes.
|
||
d=$((s / 60 / 60 / 24))
|
||
h=$((s / 60 / 60 % 24))
|
||
m=$((s / 60 % 60))
|
||
|
||
# Only append days, hours and minutes if they're non-zero.
|
||
[ "$d" = 0 ] || uptime="${uptime}${d}d "
|
||
[ "$h" = 0 ] || uptime="${uptime}${h}h "
|
||
[ "$m" = 0 ] || uptime="${uptime}${m}m "
|
||
|
||
log uptime "${uptime:-0m}"
|
||
}
|
||
|
||
get_pkgs() {
|
||
# Simple function to avoid '>/dev/null' spam.
|
||
# This checks to see if a command is in '$PATH'.
|
||
has() { command -v "$1" >/dev/null; }
|
||
|
||
# This works by first checking for which package managers are
|
||
# isntalled and finally by printing each package manager's
|
||
# package list with each package one per line.
|
||
#
|
||
# The output from this is then piped to 'wc -l' to count each
|
||
# line, giving us the total package count of whatever package
|
||
# managers are installed.
|
||
packages=$(
|
||
case $os in
|
||
Linux*)
|
||
# Commands which print packages one per line.
|
||
has kiss && kiss l
|
||
has bonsai && bonsai list
|
||
has pacman-key && pacman -Qq
|
||
has dpkg && dpkg-query -f '.\n' -W
|
||
has rpm && rpm -qa
|
||
has xbps-query && xbps-query -l
|
||
has apk && apk info
|
||
|
||
# Directories containing packages.
|
||
has brew && printf '%s\n' "$(brew --cellar)/"*
|
||
has emerge && printf '%s\n' /var/db/pkg/*/*/
|
||
|
||
# GUIX requires two commands.
|
||
has guix && guix package -p /run/current-system/profile -I
|
||
has guix && guix package -I
|
||
;;
|
||
|
||
Darwin*)
|
||
# Commands which print packages one per line.
|
||
has pkgin && pkgin list
|
||
has port && port installed
|
||
|
||
# Directories containing packages.
|
||
has brew && printf '%s\n' /usr/local/Cellar/*
|
||
;;
|
||
|
||
FreeBSD*)
|
||
# Commands which print packages one per line.
|
||
has pkg && pkg info
|
||
;;
|
||
|
||
*BSD*)
|
||
# Commands which print packages one per line.
|
||
has pkginfo && pkginfo -i
|
||
has pkg && pkg list
|
||
has pkg_info && pkg_info
|
||
;;
|
||
esac | wc -l
|
||
)
|
||
|
||
log pkgs "$packages"
|
||
}
|
||
|
||
get_memory() {
|
||
case $os in
|
||
# Used memory is calculated using the following "formula" (Linux):
|
||
# MemUsed = MemTotal + Shmem - MemFree - Buffers - Cached - SReclaimable
|
||
# Source: https://github.com/KittyKatt/screenFetch/issues/386
|
||
Linux*)
|
||
# Parse the '/proc/meminfo' file splitting on ':' and 'k'.
|
||
# The format of the file is 'key: 000kB' and an additional
|
||
# split is used on 'k' to filter out 'kB'.
|
||
while IFS=:k read -r key val _; do
|
||
case $key in
|
||
MemTotal)
|
||
mem_used=$((mem_used + val))
|
||
mem_full=$val
|
||
;;
|
||
|
||
Shmem)
|
||
mem_used=$((mem_used + val))
|
||
;;
|
||
|
||
MemFree|Buffers|Cached|SReclaimable)
|
||
mem_used=$((mem_used - val))
|
||
;;
|
||
esac
|
||
done < /proc/meminfo
|
||
|
||
mem_used=$((mem_used / 1024))
|
||
mem_full=$((mem_full / 1024))
|
||
;;
|
||
|
||
# Used memory is calculated using the following "formula" (MacOS):
|
||
# wired + active + occupied * 4 / 1024
|
||
Darwin*)
|
||
mem_full=$(($(sysctl -n hw.memsize) / 1024 / 1024))
|
||
|
||
# Parse the 'vmstat' file splitting on ':' and '.'.
|
||
# The format of the file is 'key: 000.' and an additional
|
||
# split is used on '.' to filter it out.
|
||
while IFS=:. read -r key val; do
|
||
case $key in
|
||
*wired*|*active*|*occupied*)
|
||
mem_used=$((mem_used + ${val:-0}))
|
||
;;
|
||
esac
|
||
|
||
# Using '<<-EOF' is the only way to loop over a command's
|
||
# output without the use of a pipe ('|') or subshell.
|
||
# This ensures that any variables defined in the while loop
|
||
# are still accessible in the script.
|
||
done <<-EOF
|
||
$(vmstat)
|
||
EOF
|
||
|
||
mem_used=$((mem_used * 4 / 1024))
|
||
;;
|
||
|
||
OpenBSD*)
|
||
# If you run OpenBSD and can send me the full output of
|
||
# 'vm_stat' I'll be able to add full support here.
|
||
mem_full=$(($(sysctl -n hw.physmem) / 1024 / 1024))
|
||
;;
|
||
|
||
FreeBSD*)
|
||
# If you run FreeBSD and can help me get
|
||
# the used memory amount, I'll be able to add support here.
|
||
mem_full=$(($(sysctl -n hw.physmem) / 1024 / 1024))
|
||
;;
|
||
esac
|
||
|
||
log memory "${mem_used:-?}MiB / ${mem_full:-?}MiB"
|
||
}
|
||
|
||
get_ascii() {
|
||
# This is a simple function to read the contents of
|
||
# an ascii file from 'stdin'. It allows for the use
|
||
# of '<<-EOF' to prevent the break in indentation in
|
||
# this source code.
|
||
read_ascii() {
|
||
# 'PF_COL1': Set the info name color according to ascii color.
|
||
# 'PF_COL3': Set the title color to some other color. ¯\_(ツ)_/¯
|
||
PF_COL1=${PF_COL1:-${1:-7}}
|
||
PF_COL3=${PF_COL3:-$((${1:-7}%8+1))}
|
||
|
||
while IFS= read -r line; do
|
||
ascii="$ascii$line
|
||
"
|
||
done
|
||
}
|
||
|
||
# This checks for ascii art in the following order:
|
||
# '$1': Argument given to 'get_ascii()' directly.
|
||
# '$PF_ASCII': Environment variable set by user.
|
||
# '$distro': The detected distribution name.
|
||
# '$os': The name of the operating system/kernel.
|
||
#
|
||
# NOTE: Each ascii art below is indented using tabs, this
|
||
# allows indentation to continue naturally despite
|
||
# the use of '<<-EOF'.
|
||
case ${1:-${PF_ASCII:-${distro:-$os}}} in
|
||
[Aa]lpine*)
|
||
read_ascii 4 <<-EOF
|
||
${c4} /\\ /\\
|
||
/${c7}/ ${c4}\\ \\
|
||
/${c7}/ ${c4}\\ \\
|
||
/${c7}// ${c4}\\ \\
|
||
${c7}// ${c4}\\ \\
|
||
\\
|
||
EOF
|
||
;;
|
||
|
||
[Aa]rch*)
|
||
read_ascii 4 <<-EOF
|
||
${c6} /\\
|
||
/^^\\
|
||
/\\ \\
|
||
/${c7} __ \\
|
||
/ ( ) \\
|
||
/ __| |__\\\\
|
||
/// \\\\\\
|
||
EOF
|
||
;;
|
||
|
||
[Aa]rco*)
|
||
read_ascii 4 <<-EOF
|
||
${c4} /\\
|
||
/ \\
|
||
/ /\\ \\
|
||
/ / \\ \\
|
||
/ / \\ \\
|
||
/ / _____\\ \\
|
||
/_/ \`----.\\_\\
|
||
EOF
|
||
;;
|
||
|
||
[Aa]rtix*)
|
||
read_ascii 6 <<-EOF
|
||
${c4} /\\
|
||
/ \\
|
||
/\`'.,\\
|
||
/ ',
|
||
/ ,\`\\
|
||
/ ,.'\`. \\
|
||
/.,'\` \`'.\\
|
||
EOF
|
||
;;
|
||
|
||
[Cc]ent[Oo][Ss]*)
|
||
read_ascii 5 <<-EOF
|
||
${c2} ____${c3}^${c5}____
|
||
${c2} |\\ ${c3}|${c5} /|
|
||
${c2} | \\ ${c3}|${c5} / |
|
||
${c5}<---- ${c4}---->
|
||
${c4} | / ${c2}|${c3} \\ |
|
||
${c4} |/__${c2}|${c3}__\\|
|
||
${c2} v
|
||
EOF
|
||
;;
|
||
|
||
[Dd]ebian*)
|
||
read_ascii 1 <<-EOF
|
||
${c1} _____
|
||
/ __ \\
|
||
| / |
|
||
| \\___-
|
||
-_
|
||
--_
|
||
EOF
|
||
;;
|
||
|
||
[Ee]lementary*)
|
||
read_ascii <<-EOF
|
||
${c7} _______
|
||
/ ____ \\
|
||
/ | / /\\
|
||
|__\\ / / |
|
||
\\ /__/ /
|
||
\\_______/
|
||
EOF
|
||
;;
|
||
|
||
[Ff]edora*)
|
||
read_ascii 4 <<-EOF
|
||
${c7} _____
|
||
/ __)${c4}\\${c7}
|
||
| / ${c4}\\ \\${c7}
|
||
${c4}__${c7}_| |_${c4}_/ /${c7}
|
||
${c4}/ ${c7}(_ _)${c4}_/${c7}
|
||
${c4}/ /${c7} | |
|
||
${c4}\\ \\${c7}__/ |
|
||
${c4}\\${c7}(_____/
|
||
EOF
|
||
;;
|
||
|
||
[Ff]ree[Bb][Ss][Dd]*)
|
||
read_ascii 1 <<-EOF
|
||
${c1} /\\ _____ /\\
|
||
\\_) (_/
|
||
/ \\
|
||
| |
|
||
| |
|
||
\ /
|
||
--_____--
|
||
EOF
|
||
;;
|
||
|
||
[Gg]entoo*)
|
||
read_ascii 5 <<-EOF
|
||
${c5} _-----_
|
||
( \\
|
||
\\ 0 \\
|
||
${c7} \\ )
|
||
/ _/
|
||
( _-
|
||
\\____-
|
||
EOF
|
||
;;
|
||
|
||
[Gg]uix[Ss][Dd]*|guix*)
|
||
read_ascii 3 <<-EOF
|
||
${c3}|.__ __.|
|
||
|__ \\ / __|
|
||
\\ \\ / /
|
||
\\ \\ / /
|
||
\\ \\ / /
|
||
\\ \\/ /
|
||
\\__/
|
||
EOF
|
||
;;
|
||
|
||
[Hh]yperbola*)
|
||
read_ascii <<-EOF
|
||
${c7} |\`__.\`/
|
||
\____/
|
||
.--.
|
||
/ \\
|
||
/ ___ \\
|
||
/ .\` \`.\\
|
||
/.\` \`.\\
|
||
EOF
|
||
;;
|
||
|
||
[Ll]inux*[Ll]ite*)
|
||
read_ascii 3 <<-EOF
|
||
${c3} /\\
|
||
/ \\
|
||
/ ${c7}/ ${c3}/
|
||
> ${c7}/ ${c3}/
|
||
\\ ${c7}\\ ${c3}\\
|
||
\\_${c7}\\${c3}_\\
|
||
${c7} \\
|
||
EOF
|
||
;;
|
||
|
||
[Ll]inux*[Mm]int*|[Mm]int)
|
||
read_ascii 2 <<-EOF
|
||
${c2} ___________
|
||
${c2}|_ \\
|
||
${c2} | ${c7}| _____ ${c2}|
|
||
${c2} | ${c7}| | | | ${c2}|
|
||
${c2} | ${c7}| | | | ${c2}|
|
||
${c2} | ${c7}\\__${c7}___/ ${c2}|
|
||
${c2} \\_________/
|
||
EOF
|
||
;;
|
||
|
||
|
||
[Ll]inux*)
|
||
read_ascii 4 <<-EOF
|
||
${c4} ___
|
||
(${c7}.· ${c4}|
|
||
(${c5}<> ${c4}|
|
||
/ ${c7}__ ${c4}\\
|
||
( ${c7}/ \\ ${c4}/|
|
||
${c5}_${c4}/\\ ${c7}__)${c4}/${c5}_${c4})
|
||
${c5}\/${c4}-____${c5}\/
|
||
EOF
|
||
;;
|
||
|
||
[Mm]ac[Oo][Ss]*|[Dd]arwin*)
|
||
read_ascii 1 <<-EOF
|
||
${c1} .:'
|
||
_ :'_
|
||
${c2} .'\`_\`-'_\`\`.
|
||
:________.-'
|
||
${c3}:_______:
|
||
${c4} :_______\`-;
|
||
${c5} \`._.-._.'
|
||
EOF
|
||
;;
|
||
|
||
[Mm]ageia*)
|
||
read_ascii 2 <<-EOF
|
||
${c6} *
|
||
*
|
||
**
|
||
${c7} /\\__/\\
|
||
/ \\
|
||
\\ /
|
||
\\____/
|
||
EOF
|
||
;;
|
||
|
||
[Mm]anjaro*)
|
||
read_ascii 2 <<-EOF
|
||
${c2}||||||||| ||||
|
||
||||||||| ||||
|
||
|||| ||||
|
||
|||| |||| ||||
|
||
|||| |||| ||||
|
||
|||| |||| ||||
|
||
|||| |||| ||||
|
||
EOF
|
||
;;
|
||
|
||
[Mm][Xx]*)
|
||
read_ascii <<-EOF
|
||
${c7} \\\\ /
|
||
\\\\/
|
||
\\\\
|
||
/\\/ \\\\
|
||
/ \\ /\\
|
||
/ \\/ \\
|
||
/__________\\
|
||
EOF
|
||
;;
|
||
|
||
[Nn]et[Bb][Ss][Dd]*)
|
||
read_ascii 3 <<-EOF
|
||
${c7}\\\\${c3}\`-______,----__
|
||
${c7} \\\\ ${c3}__,---\`_
|
||
${c7} \\\\ ${c3}\`.____
|
||
${c7} \\\\${c3}-______,----\`-
|
||
${c7} \\\\
|
||
\\\\
|
||
\\\\
|
||
EOF
|
||
;;
|
||
|
||
[Nn]ix[Oo][Ss]*)
|
||
read_ascii 4 <<-EOF
|
||
${c4} \\\\ \\\\ //
|
||
==\\\\__\\\\/ //
|
||
// \\\\//
|
||
==// //==
|
||
//\\\\___//
|
||
// /\\\\ \\\\==
|
||
// \\\\ \\\\
|
||
EOF
|
||
;;
|
||
|
||
[Oo]pen[Bb][Ss][Dd]*)
|
||
read_ascii 3 <<-EOF
|
||
${c3} _____
|
||
\\- -/
|
||
\\_/ \\
|
||
| ${c7}O O${c3} |
|
||
|_ < ) 3 )
|
||
/ \\ /
|
||
/-_____-\\
|
||
EOF
|
||
;;
|
||
|
||
openSUSE*|open*SUSE*|[SUSE*|suse*)
|
||
read_ascii 2 <<-EOF
|
||
${c2} _______
|
||
__| __ \\
|
||
/ .\\ \\
|
||
\\__/ |
|
||
_______|
|
||
\\_______
|
||
__________/
|
||
EOF
|
||
;;
|
||
|
||
[Pp]arabola*)
|
||
read_ascii 5 <<-EOF
|
||
${c5} __ __ __ _
|
||
.\`_//_//_/ / \`.
|
||
/ .\`
|
||
/ .\`
|
||
/.\`
|
||
/\`
|
||
EOF
|
||
;;
|
||
|
||
[Pp]op!_[Oo][Ss]*)
|
||
read_ascii 6 <<-EOF
|
||
${c6}______
|
||
\\ _ \\ __
|
||
\\ \\ \\ \\ / /
|
||
\\ \\_\\ \\ / /
|
||
\\ ___\\ /_/
|
||
\\ \\ _
|
||
__\\_\\__(_)_
|
||
(___________)
|
||
EOF
|
||
;;
|
||
|
||
[Pp]ure[Oo][Ss]*)
|
||
read_ascii <<-EOF
|
||
${c7} _____________
|
||
| _________ |
|
||
| | | |
|
||
| | | |
|
||
| |_________| |
|
||
|_____________|
|
||
EOF
|
||
;;
|
||
|
||
[Ss]lackware*)
|
||
read_ascii 4 <<-EOF
|
||
${c4} ________
|
||
/ ______|
|
||
| |______
|
||
\\______ \\
|
||
______| |
|
||
| |________/
|
||
|____________
|
||
EOF
|
||
;;
|
||
|
||
[Vv]oid*)
|
||
read_ascii 2 <<-EOF
|
||
${c2} _______
|
||
_ \\______ -
|
||
| \\ ___ \\ |
|
||
| | / \ | |
|
||
| | \___/ | |
|
||
| \\______ \\_|
|
||
-_______\\
|
||
EOF
|
||
;;
|
||
|
||
*)
|
||
# On no match of a distribution ascii art, this function calls
|
||
# itself again, this time to look for a more generic OS related
|
||
# ascii art (KISS Linux -> Linux).
|
||
[ "$1" ] || {
|
||
get_ascii "$os"
|
||
return
|
||
}
|
||
|
||
printf 'error: %s is not currently supported.\n' "$os"
|
||
printf 'error: Open an issue on GitHub for support to be added.\n'
|
||
exit 1
|
||
;;
|
||
esac
|
||
|
||
# Store the "width" (longest line) and "height" (number of lines)
|
||
# of the ascii art for positioning. This script prints to the screen
|
||
# *almost* like a TUI does. It uses escape sequences to allow dynamic
|
||
# printing of the information through user configuration.
|
||
#
|
||
# Iterate over each line of the ascii art to retrieve the above
|
||
# information. The 'sed' is used to strip '[3Xm' color codes from
|
||
# the ascii art so they don't affect the width variable.
|
||
#
|
||
# The " " acts as the padding between the ascii art and the text as
|
||
# it appends 3 spaces to the end of each line.
|
||
while read -r line; do
|
||
ascii_height=$((ascii_height + 1))
|
||
ascii_width=$((${#line} > ascii_width ? ${#line} : ascii_width))
|
||
|
||
# Using '<<-EOF' is the only way to loop over a command's
|
||
# output without the use of a pipe ('|') or subshell.
|
||
# This ensures that any variables defined in the while loop
|
||
# are still accessible in the script.
|
||
done <<-EOF
|
||
$(printf %s "$ascii" | sed 's/\[3.m//g')
|
||
EOF
|
||
|
||
# Add a gap between the ascii art and the information.
|
||
: $((ascii_width+=4))
|
||
|
||
# Print the ascii art and position the cursor back where we
|
||
# started prior to printing it.
|
||
# '[?7l': Disable line-wrapping.
|
||
# '[?25l': Hide the cursor.
|
||
# '[1m': Print the ascii in bold.
|
||
# '[m': Clear bold.
|
||
# '[%sA: Move the cursor up '$ascii_height' amount of lines.
|
||
printf '[?7l[?25l[1m%s[m[%sA' "$ascii" "$ascii_height"
|
||
}
|
||
|
||
main() {
|
||
# Leave the terminal how we found it on exit or Ctrl+C.
|
||
# '[?7h': Enable line-wrapping.
|
||
# '[?25h': Un-hide the cursor.
|
||
trap 'printf [?7h[?25h' EXIT INT
|
||
|
||
# Hide 'stderr' unless the first argument is '-v'. This saves
|
||
# polluting the script with '2>/dev/null'.
|
||
[ "$1" = -v ] || exec 2>/dev/null
|
||
|
||
# Generic color list.
|
||
# Disable warning about unused variables.
|
||
# shellcheck disable=2034
|
||
{
|
||
c1='[31m'; c2='[32m'
|
||
c3='[33m'; c4='[34m'
|
||
c5='[35m'; c6='[36m'
|
||
c7='[37m'; c8='[38m'
|
||
}
|
||
|
||
# Store the output of 'uname' to avoid calling it multiple times
|
||
# throughout the script. 'read <<EOF' is the simplest way of reading
|
||
# a command into a list of variables.
|
||
read -r os kernel <<-EOF
|
||
$(uname -sr)
|
||
EOF
|
||
|
||
os=Darwin
|
||
|
||
# Always run 'get_os' for the purposes of detecting which ascii
|
||
# art to display.
|
||
get_os
|
||
|
||
# Allow the user to specify the order and inclusion of information
|
||
# functions through the 'PF_INFO' environment variable.
|
||
# shellcheck disable=2086
|
||
{
|
||
# Disable globbing and set the positional parameters to the
|
||
# contents of 'PF_INFO'.
|
||
set -f
|
||
set +f ${PF_INFO-ascii title os host kernel uptime pkgs memory}
|
||
|
||
# Iterate over the info functions to determine the lengths of the
|
||
# "info names" for output alignment. The option names and subtitles
|
||
# match 1:1 so this is thankfully simple.
|
||
for info; do
|
||
command -v "get_$info" >/dev/null &&
|
||
info_length=$((${#info} > info_length ? ${#info} : info_length))
|
||
done
|
||
|
||
# Add an additional space of length to act as a gap.
|
||
: $((info_length+=1))
|
||
|
||
# Iterate over the above list and run any existing "get_" functions.
|
||
for info; do "get_$info"; done
|
||
}
|
||
|
||
# Position the cursor below both the ascii art and information lines
|
||
# according to the height of both. If the information exceeds the ascii
|
||
# art in height, don't touch the cursor, else move it down N lines.
|
||
cursor_pos=$((info_height > ascii_height ? 0 : ascii_height - info_height))
|
||
|
||
# Print '$cursor_pos' amount of newlines. Using cursor down doesn't scroll
|
||
# the screen correctly if this causes the cursor to hit the bottom of the
|
||
# window. Using '0' gives us an extra iteration, adding a bottom line gap.
|
||
printf '%0.s\n' $(seq 0 "$cursor_pos")
|
||
}
|
||
|
||
main "$@"
|