前几天我写了一个简单的进度条函数:

#!/bin/bash
# 1. Create ProgressBar function
# 1.1 Input is currentState($1) and totalState($2)
function ProgressBar {
# Process data
    let _progress=(${1}*100/${2}*100)/100
    let _done=(${_progress}*4)/10
    let _left=40-$_done
# Build progressbar string lengths
    _fill=$(printf "%${_done}s")
    _empty=$(printf "%${_left}s")

# 1.2 Build progressbar strings and print the ProgressBar line
# 1.2.1 Output example:                           
# 1.2.1.1 Progress : [########################################] 100%
printf "\rProgress : [${_fill// /#}${_empty// /-}] ${_progress}%%"

}

# Variables
_start=1

# This accounts as the "totalState" variable for the ProgressBar function
_end=100

# Proof of concept
for number in $(seq ${_start} ${_end})
do
    sleep 0.1
    ProgressBar ${number} ${_end}
done
printf '\nFinished!\n'

或者从， https://github.com/fearside/ProgressBar/

这是它看起来的样子

上传文件

[##################################################] 100% (137921 / 137921 bytes)

等待一项工作完成

[#########################                         ] 50% (15 / 30 seconds)

实现它的简单函数

你可以复制粘贴到你的脚本。它不需要任何其他东西来工作。

PROGRESS_BAR_WIDTH=50  # progress bar length in characters

draw_progress_bar() {
  # Arguments: current value, max value, unit of measurement (optional)
  local __value=$1
  local __max=$2
  local __unit=${3:-""}  # if unit is not supplied, do not display it

  # Calculate percentage
  if (( $__max < 1 )); then __max=1; fi  # anti zero division protection
  local __percentage=$(( 100 - ($__max*100 - $__value*100) / $__max ))

  # Rescale the bar according to the progress bar width
  local __num_bar=$(( $__percentage * $PROGRESS_BAR_WIDTH / 100 ))

  # Draw progress bar
  printf "["
  for b in $(seq 1 $__num_bar); do printf "#"; done
  for s in $(seq 1 $(( $PROGRESS_BAR_WIDTH - $__num_bar ))); do printf " "; done
  printf "] $__percentage%% ($__value / $__max $__unit)\r"
}

使用的例子

在这里，我们上传一个文件，并在每次迭代时重新绘制进度条。只要我们能得到两个值:最大值和当前值，实际执行的作业是什么并不重要。

在下面的例子中，最大值是file_size，当前值由某个名为uploaded_bytes的函数提供。

# Uploading a file
file_size=137921

while true; do
  # Get current value of uploaded bytes
  uploaded_bytes=$(some_function_that_reports_progress)

  # Draw a progress bar
  draw_progress_bar $uploaded_bytes $file_size "bytes"

  # Check if we reached 100%
  if [ $uploaded_bytes == $file_size ]; then break; fi
  sleep 1  # Wait before redrawing
done
# Go to the newline at the end of upload
printf "\n"

#!/bin/bash

function progress_bar() {
    bar=""
    total=10
    [[ -z $1 ]] && input=0 || input=${1}
    x="##"
   for i in `seq 1 10`; do
        if [ $i -le $input ] ;then
            bar=$bar$x
        else
            bar="$bar  "
       fi
    done
    #pct=$((200*$input/$total % 2 + 100*$input/$total))
    pct=$(($input*10))
    echo -ne "Progress : [ ${bar} ] (${pct}%) \r"    
    sleep 1
    if [ $input -eq 10 ] ;then
        echo -ne '\n'
    fi

}

可以创建一个函数，以1-10的比例绘制bar数:

progress_bar 1
echo "doing something ..."
progress_bar 2
echo "doing something ..."
progress_bar 3
echo "doing something ..."
progress_bar 8
echo "doing something ..."
progress_bar 10

如果你必须显示一个临时进度条(通过提前知道显示时间)，你可以像下面这样使用Python:

#!/bin/python
from time import sleep
import sys

if len(sys.argv) != 3:
    print "Usage:", sys.argv[0], "<total_time>", "<progressbar_size>"
    exit()

TOTTIME=float(sys.argv[1])
BARSIZE=float(sys.argv[2])

PERCRATE=100.0/TOTTIME
BARRATE=BARSIZE/TOTTIME

for i in range(int(TOTTIME)+1):
    sys.stdout.write('\r')
    s = "[%-"+str(int(BARSIZE))+"s] %d%% "
    sys.stdout.write(s % ('='*int(BARRATE*i), int(PERCRATE*i)))
    sys.stdout.flush()
    SLEEPTIME = 1.0
    if i == int(TOTTIME): SLEEPTIME = 0.1
    sleep(SLEEPTIME)
print ""

然后，假设您将Python脚本保存为progressbar.py，可以通过运行以下命令从您的bash脚本中显示进度条:

python progressbar.py 10 50

它将显示一个50个字符大小的进度条，并“运行”10秒。

这只适用于使用地精天顶。Zenity为bash脚本提供了一个很棒的本机界面: https://help.gnome.org/users/zenity/stable/

来自Zenity进度条示例:

#!/bin/sh
(
echo "10" ; sleep 1
echo "# Updating mail logs" ; sleep 1
echo "20" ; sleep 1
echo "# Resetting cron jobs" ; sleep 1
echo "50" ; sleep 1
echo "This line will just be ignored" ; sleep 1
echo "75" ; sleep 1
echo "# Rebooting system" ; sleep 1
echo "100" ; sleep 1
) |
zenity --progress \
  --title="Update System Logs" \
  --text="Scanning mail logs..." \
  --percentage=0

if [ "$?" = -1 ] ; then
        zenity --error \
          --text="Update canceled."
fi

我在寻找比选定的答案更性感的东西，我自己的剧本也是如此。

预览

源

我把它放在github的progress-bar.sh上

progress-bar() {
  local duration=${1}


    already_done() { for ((done=0; done<$elapsed; done++)); do printf "▇"; done }
    remaining() { for ((remain=$elapsed; remain<$duration; remain++)); do printf " "; done }
    percentage() { printf "| %s%%" $(( (($elapsed)*100)/($duration)*100/100 )); }
    clean_line() { printf "\r"; }

  for (( elapsed=1; elapsed<=$duration; elapsed++ )); do
      already_done; remaining; percentage
      sleep 1
      clean_line
  done
  clean_line
}

使用

 progress-bar 100