Question

我需要Bash脚本在file.tag中生成自动标记。当在同一天多次调用脚本时，必须增加COUNTER。当日期发生变化时，COUNTER必须重置为001.谢谢

我试过了

#!/bin/bash 
touch file.tag 
counter=0 
date=$(date +"%y.%m.%d") 
echo $date.$counter > file.tag

Answer 1

试试这个：

class String

  # Create a random String of given length, using given character set
  #
  # Character set is an Array which can contain Ranges, Arrays, Characters
  #
  # Examples
  #
  #     String.random
  #     => "D9DxFIaqR3dr8Ct1AfmFxHxqGsmA4Oz3"
  #
  #     String.random(10)
  #     => "t8BIna341S"
  #
  #     String.random(10, ['a'..'z'])
  #     => "nstpvixfri"
  #
  #     String.random(10, ['0'..'9'] )
  #     => "0982541042"
  #
  #     String.random(10, ['0'..'9','A'..'F'] )
  #     => "3EBF48AD3D"
  #
  #     BASE64_CHAR_SET =  ["A".."Z", "a".."z", "0".."9", '_', '-']
  #     String.random(10, BASE64_CHAR_SET)
  #     => "xM_1t3qcNn"
  #
  #     SPECIAL_CHARS = ["!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "-", "_", "=", "+", "|", "/", "?", ".", ",", ";", ":", "~", "`", "[", "]", "{", "}", "<", ">"]
  #     BASE91_CHAR_SET =  ["A".."Z", "a".."z", "0".."9", SPECIAL_CHARS]
  #     String.random(10, BASE91_CHAR_SET)
  #      => "S(Z]z,J{v;"
  #

  def self.random(len=32, character_set = ["A".."Z", "a".."z", "0".."9"])
    chars = character_set.map{|x| x.is_a?(Range) ? x.to_a : x }.flatten
    Array.new(len){ chars.sample }.join
  end

end

这个脚本：

计算file.tag中当前日期的出现次数
递增此计数器
将日期和计数器添加到file.tag

如果日期不匹配，[[ ! -f ./file.tag ]] && touch file.tag declare -i counter dt=$(date +'%y.%m.%d') counter=$(grep -c "${dt}" file.tag) (( counter++ )) printf '%s.%03d\n' ${dt} ${counter} >> file.tag将返回0，从001

开始另一天

Answer 2

我在你的例子中注意到file.tag总是只有一行：最后一个标签，对吗？

尝试使用此版本（使用shellcheck进行测试和检查）：

#!/bin/bash 

touch file.tag 
date=$(date +"%y.%m.%d") 
counter=0
if [ -s file.tag ]
then
  lastline=$(tail -1 file.tag)
  if [ "${date}" = "$(expr "${lastline}" : "^\([0-9.][0-9.]*\)[.][0-9][0-9]*$")" ]
  then
    counter=$(expr "${lastline}" : "^[0-9.][0-9.]*[.]\([0-9][0-9]*\)$")
    counter=$((counter + 1))
  fi
fi
printf "%s\n" "${date}.${counter}" > file.tag

脚本检查file.tag是否为空。

如果不为空，则从file.tag中提取最后一个日期，并将其与当前日期进行比较。

如果日期相等，那么它会从file.tag中提取计数器的最后一个值并递增它

最终用新标签

更新file.tag

日期和反bash脚本

2 个答案: