mjhjmtu

EDIT FOR CLARITY :

say I have the following script (let's posit pv and curl are already installed) :

_{(that currently runs under ubuntu but that I plan to make POSIX-compliant so that it may run on more linux ditributions)}

#!/bin/bash
sudo apt install vlc
mkdir -p ~/.steam/compatibilitytools.d
PROTONVERSIONNUMBER=$(curl -v --silent https://api.github.com/repos/popsUlfr/Proton/releases 2>&1 | grep "tag_name" | head -n 1 | cut -f4,4 -d""")
REPLACING=$(curl -v --silent https://api.github.com/repos/popsUlfr/Proton/releases 2>&1 | grep "target_commitish" | head -n 1 | cut -f4,4 -d""" | sed "s/[^_]+/Lu&/g")
PROTONVERSION=$REPLACING/_G/-6_G
PROTONNAME=$PROTONVERSION"_"$PROTONVERSIONNUMBER##*-
wget https://github.com/popsUlfr/Proton/releases/download/$PROTONVERSIONNUMBER/$PROTONNAME.tar.xz
pv $PROTONNAME.tar.xz | tar xp -J -C ~/.steam/compatibilitytools.d
rm $PROTONNAME.tar.xz

I get three progress bars, these progress bars seem very beautiful to me :

_{the way they're accurate and stuff, I dunno call me a weirdo}

QUESTION

How do I utilize the power of these three seperate progress bars to form one continuous progress bar that respects currents progress bar "speeds" of the underlying "true" progress bars?

Here is a sample piece of code that demonstrates how you can have multiple sections of "work" all updating the same progress meter. The Whiptail gauge is attached to the script's file descriptor 3, so that it can be updated at any point during the script. (The gauge exits automatically when the script ends, or when FD 3 is explicitly closed.)

#!/bin/bash
#
pid=
tmpd=

tidyUp()

 # Clean up when we're done
 exec 3>&-
 [[ -n "$tmpd" ]] && rm -rf "$tmpd"

trap 'ss=$?; tidyUp; exit $ss' 1 2 15


updateGauge()

 local percent="$1" message="$2"
 printf "XXXn%dn%snXXXn" $percent "$message" >&3



# Create the FIFO for communicating with the whiptail gauge
tmpd=$(mktemp --tmpdir --directory "wt.XXXXXXXXXX")
mkfifo "$tmpd/fifo"

# Start up the whiptail gauge and associate FD 3 with its status
whiptail --title 'Progress meter' --gauge 'Starting examples' 6 50 0 <"$tmpd/fifo" &
exec 3>"$tmpd/fifo"

# Real code starts here
percent=0

for example in 1 2 3
do
 updateGauge $percent "Getting example $example"
 sleep 3 # wget something

 percent=$((percent + 20))
done

for another in 4 5
do
 updateGauge $percent "Doing work for another example $another"
 sleep 2 # do some work

 percent=$((percent + 20))
done

# Done
tidyUp
exit 0