$ printf 'LABEL: ' ; \
  printf '█%.0s' {1..10} ; \
  printf ' 10\n'

LABEL: ████████████████████ 10

$ label="temp"; val=20;
$ bar="printf '█%.0s' {1..$val}" ; 
$ printf '\n%-5s ' $label; eval $bar ; printf ' %d\n' $val

temp  ████████████████████ 20

#!/bin/bash
# 
# cpu_bars.sh - Show new data every 10 seconds
#
while :; do
    # Get data values
    CPUtemp=$(sensors | grep CPU | awk '{print substr($2,2,4)}')
    CPUidle=$(iostat | awk '{if (NR==4) print $6}')
    Random1=$((1+ $RANDOM % 100))
    Random2=$((1+ $RANDOM % 100))

    labels=( CPUtemp CPUidle Random1 Random2)
    values=( $CPUtemp $CPUidle $Random1 $Random2)
    units=( degC % psi mm)

    # Show a title
    tput clear
    printf " %10s " "" 
    tput setaf 7; tput smul;
    printf "%s\n\n" "Show CPU Data ($(date +%T'))"
    tput rmul;

    # cycle thru data and show a label, 
    for index in "${!labels[@]}"
    do
          tput setaf $(expr $index + 1); # don't use 0 (black) 
          printf " %10s " "${labels[index]}"
          eval "printf '█%.0s' {1..${values[index]%.*}}"
          printf " %s %s\n\n" ${values[index]} ${units[index]}
    done
    sleep 10
done

$ (printf "<h1>A Bar from Bash</h1>\n" 
 printf "<pre><span style='font-size:24px;color:red'}>\n"
 printf 'LABEL1: ' ; printf '█%.0s' {1..10} ; printf ' 10\n'
 printf "</pre></span>\n") > bar1.htm

$ cat bar1.htm
<h1>A Bar from Bash</h1>
<pre><span style='font-size:24px;color:red'}>
LABEL1: ██████████ 10
</pre></span>

#!/bin/bash
# 
# cpu_webbars.sh - Show bars in HTML
#

# Get data values
CPUtemp=$(sensors | grep CPU | awk '{print substr($2,2,4)}')
CPUidle=$(iostat | awk '{if (NR==4) print $6}')
Random1=$((1+ $RANDOM % 100))
Random2=$((1+ $RANDOM % 100))

labels=( CPUtemp CPUidle Random1 Random2)
values=( $CPUtemp $CPUidle $Random1 $Random2)
units=( degC % psi mm)
colors=(red blue green magenta)

# Show a title
printf "<h1><center>Show CPU Data ($(date '+%T'))</center></h1>\n"
# cycle thru data and show a label, 
for index in "${!labels[@]}"
  do
  printf "<pre><span style='font-size:18px;color: ${colors[index]} '}>\n"
  printf " %10s " "${labels[index]}"
  eval "printf '█%.0s' {1..${values[index]%.*}}"
  printf " %s %s\n\n" ${values[index]} ${units[index]}
  printf "</pre></span>\n"
done

header.htm > test.htm ; \
cat cpu_webbars.sh >> test.htm ; \
cat footer >> test.htm 

#!/bin/bash
# hbar0.sh - Read in piped data  and plot bars
#     format: label,value;label2,value2;  and plot bars
#
input=$(< /dev/stdin) ; # read piped data
# remove new lines in files, and check for ";" after data pair 
input=$(echo $input | tr -d '\n')
IFS=';' read -r -a data <<< $input
printf "\n" 
for element in "${data[@]}"pete@lubuntu:~/Writing/Blog/text_bars
do 
  # make at array of each data element
  IFS=',' read -r -a datapt <<< $element
  # add a random color
  tput setaf $((1+ $RANDOM % 7))
  # print the label, bar and value
  printf " %10s " "${datapt##*[0]}"
  bar="printf '█%.0s' {1..${datapt[1]}}"
  eval $bar
  printf " %s\n\n" ${datapt[1]} 
  tput rmso ; # exit color mode   
done

# Strip out ANSI color codes:
cat infile | sed 's/\x1b\[[0-9;]*m//g' > outfile

$ ./hbars
usage: hbars [data] [option] 
  -h --help     print this usage and exit
  -c --color    set color to all bars (default 7=white)
                 (0-grey,1-red,2=green,3=yellow,4=blue,5=magenta,6=cyan,7=white)
  -p --pretty   add different colors to bars (-c overrides)
  -t --title    top title
  -w --width    max width of bar (default 50)
  -W --Web      make output HTML formatted
  -f --fontsize fontsize for web output (default 24)

 examples:
   echo 'temp,33,C;pressure,14,psi' | ./hbars -t Weather -p -w 40 
   ./hbars -t Weather -p -w 40  'temp,33;pressure,14' 
   cat data.txt | ./hbars -W -f 24 -t 'Raspi Data' > data.htm

#!/bin/bash
#
# hbars.sh - show some text bars
#   pass data as:  label1,value1,unit1,color1; label2,value2,unit2,colour2; ....  
#
width=50
title=""
color=7
pretty=False
web=False
font=24

usage() { 
  echo "usage: hbars [data] [option] "
  echo "  -h --help     print this usage and exit"
  echo "  -c --color    set color to all bars (default 7=white)"
  echo "                 (0-grey,1-red,2=green,3=yellow,4=blue,5=magenta,6=cyan,7=white)"
  echo "  -p --pretty   add different colors to bars (-c overrides)"
  echo "  -t --title    top title"
  echo "  -w --width    max width of bar (default 50)"
  echo "  -W --Web      make output HTML formatted"
  echo "  -f --fontsize fontsize for web output (default 24)"
  echo ""
  echo " examples:"
  echo "   echo 'temp,33,C;pressure,14,psi' | ./hbars -t Weather -p -w 40 "
  echo "   ./hbars -t Weather -p -w 40  'temp,33;pressure,14' "
  echo "   cat data.txt | ./hbars -W -f 24 -t 'Raspi Data' > data.htm"
  echo ""

  exit 0
}
# Show help usage if no pipe data and no cmd line data
if [ -t 0 ]  && [ $# -eq 0 ] ; then
  usage
fi
# Check for command line options
while getopts "hpc:t:w:Wf:" arg; do
  case "$arg" in
    h) usage ;;
    c)  color=$OPTARG ;;
    p)  pretty=True; icolor=0 ;;
    t)  title=$OPTARG ;;
    w)  width=$OPTARG ;;
    W)  web=True;;
    f)  font=$OPTARG ;;
  esac
done
#------------------------------------------------
# Setup formatting for text, Web and color
# -----------------------------------------------
if [[ ${color} != 7 && ${pretty} = True ]]; then
  pretty=False
fi
colidx=0

setcolors() {
if [ $web = True ]; then
  colors=(gray red green yellow blue magenta cyan white)
  titlebold="echo '<h1>'"
  titlereset="echo '</h1>'"
  #color_set='echo "<span style=font-size:$(font)px  >" ' 
  #color_set="printf '<span  style=\"font-size:$(font)px;color:${colors[colidx]}\" >'" 
  color_set="printf '<pre><span style=\"color:${colors[colidx]} ; font-size:${font}px \" >'" 
  color_rs="echo '</span></pre>'"
else
  colors=(0 1 2 3 4 5 6 7 )
  titlebold="tput bold; tput smul"
  titlereset="tput rmul; tput rmso"
  color_set="tput setaf ${colors[colidx]}"
  color_rs="tput rmso"
fi
}
setcolors
#----------------------------------------------
# Get data, check if stdlin, file, if not assume string
#----------------------------------------------
if [ -p /dev/stdin ]; then
        lastarg=$(< /dev/stdin)
else
	lastarg=$(echo "${@: -1}")
	if test -f "$lastarg"; then
	  lastarg=$(<$lastarg)
	fi
fi
# Cleanup the input data
lastarg=$(echo $lastarg | sed 's/\n/;/g; s/  / /g; s/\t//g; s/;;/;/g')
IFS=';' read -r -a array <<< $lastarg

# ensure that there is some data
if [[ ${array} == 0 ]]; then
  echo "No data found"
  exit 0
fi
echo "input:$lastarg"
#exit 0
#------------------------------------
# Get max value and max label length
#------------------------------------
maxval=0
maxlbl=10
#echo "array:${array[@]}"
for element in "${array[@]}"
do 
  IFS=',' read -r -a datapt <<< $element
  if (( $(echo "$maxval < ${datapt[1]}" |bc -l) )); then
	maxval=${datapt[1]}
  fi
  if (( $(echo "$maxlbl < ${#datapt[0]}" |bc -l) )); then
	maxlbl=${#datapt[0]}
  fi
done
#---------------------------------
# Print Title - use bold/underline
#---------------------------------
if [[ ! -z $title ]]; then
  printf "\n %${maxlbl}s " " "
  eval $titlebold
  printf "%s" "${title}" ; printf "\n\n"
  eval $titlereset
fi
#------------------------------------
# Cycle thru data and build bar chart
#------------------------------------
for element in "${array[@]}"
do
# check data values
  IFS=',' read -r -a datapt <<< $element
  # check for empty records
  if [ ${#datapt[0]} = 0 ]; then 
    break
  fi
  label=${datapt[0]}
  if [[ ${label} != "-t*" ]]; then 
	  val=${datapt[1]}
	  sval=$(bc <<< "$width * $val / $maxval")

	  # add color, use 4th item if available
	  if [[ ${#datapt[@]} > 3 && $pretty = False ]]; then
		icolor=${datapt[3]}
	  fi
	  if [[ $pretty = True ]] ; then
		let colidx++
		if [ $colidx -gt 7 ]; then
		  let colidx=1
		fi
	  elif [[ ${#datapt[@]} > 3 ]]; then
		colidx=${datapt[3]}
	  else
	  	colidx=$color
	  fi
	  setcolors
          eval $color_set
          printf " %${maxlbl}s " "$label"
	  bar="printf '█%.0s' {1..$sval}"
	  eval $bar; 
	  # add value and units if available
	  units=""
	  if [[ ${#datapt[@]} > 2 ]]; then
		units=${datapt[2]}
	  fi
	  printf " %d %s\n\n" $val "$units"
	  eval $color_rs 
  fi
done

$ cat data.txt
temp,44,degC,1;
humidity,33,%,4;
air pressure,88,mm Hg,5;
rain/precipation,6,mm,6;

$ cat data.txt | ./hbars -W -f 24 -w 50 -t '<center>Raspi Data</center>' > data.htm