如何在shell脚本中增加版本号？

以下简单的版本控制脚本旨在查找给定文件的最后版本号，递增它，使用新创建的文件（例如编辑器）运行给定命令，然后将其保存到稳定版本。由于它很简单，因此不会检查任何内容，因为脚本会根据需要进行修改。例如，如果结果不稳定，用户可以省略最后一个参数。

然而，当前功能的一个主要问题是如何实现以下功能：如果点后的最后一部分有两位数字，则一直到 99；如果只有 1，则递增到 9，然后移至上一节。这些版本可以具有任意正整数数量的部分。

1.2.3.44 -> 1.2.3.45
1.2.3.9 -> 1.2.4.0
1.2.3 -> 1.2.4
9 -> 10

剩下的问题是它不会等待选项卡式 wine 编辑器关闭文件；目标是检测选项卡何时关闭。另外，您能否解释一下如何最好地确保我的变量名称不会覆盖现有的变量名称？

您还可以提供其他改进。

#!/bin/bash
#Tested on bash 4.1.5
#All arguments in order: "folder with file" "file pattern" cmd [stable name]
folder="$1"
file_pattern="$2"
cmd="$3"
stable="$4"

cd "$folder"
last_version=$(ls --format=single-column --almost-all | \
    grep "$file_pattern" | \
    sed -nr 's/^[^0-9]*(([0-9]+\.)*[0-9]+).*/\1/p' | \
    sort -Vu | \
    tail -n 1)
last_version_file=$(ls --format=single-column --almost-all | \
    grep "$file_pattern" | \
    grep $last_version | \
    tail -n 1) #tail -n 1 is only needed to get 1 line if there are backup files with the same version number
new_version=$(echo $last_version | \
    gawk -F"." '{$NF+=1}{print $0RT}' OFS="." ORS="") #increments last section indefinitely
new_version_file=$(echo "$last_version_file" | \
    sed -r "s/$last_version/$new_version/")
cp "$last_version_file" "$new_version_file"
"$cmd" "$new_version_file" & \
    wait #works with gedit but not with wine tabbed editor
[[ "$stable" ]] && \
    cp "$new_version_file" "$stable" #True if the length of string is non-zero.

更新： 以下内容在我的电脑上有效，如果发现改进或未解决问题的解决方案，我将更新它：

#!/bin/bash
inc()
{
shopt -s extglob
    num=${last_version//./}
    let num++

    re=${last_version//./)(}
    re=${re//[0-9]/.}')'
    re=${re#*)}

    count=${last_version//[0-9]/}
    count=$(wc -c<<<$count)
    out=''
    for ((i=count-1;i>0;i--)) ; do
        out='.\\'$i$out
    done

    sed -r s/$re$/$out/ <<<$num
}

folder="$1"
file_pattern="$2"
cmd="$3"
stable="$4"

cd "$folder"
last_version=$(ls --format=single-column --almost-all | \
    grep "$file_pattern" | \
    sed -nr 's/^[^0-9]*(([0-9]+\.)*[0-9]+).*/\1/p' | \
    sort -Vu | \
    tail -n 1) #--almost-all do not list implied . and ..
last_version_file=$(ls --format=single-column --almost-all | \
    grep "$file_pattern" | \
    grep $last_version | \
    tail -n 1) #tail -n 1 is only needed to get 1 line if there are backup files with the same version number
new_version=$(inc)
new_version_file=$(echo "$last_version_file" | \
    sed -r "s/$last_version/$new_version/")
cp "$last_version_file" "$new_version_file"
"$cmd" "$new_version_file" && \
    wait #works with gedit but not tabbed wine editor
[[ "$stable" ]] && \
    cp "$new_version_file" "$stable" #True if the length of string is non-zero.

我很欣赏所提供的各种解决方案，因为它们有助于获得观点并进行比较。

$ echo 1.2.3.4 | awk -F. -v OFS=. 'NF==1{print ++$NF}; NF>1{if(length($NF+1)>length($NF))$(NF-1)++; $NF=sprintf("%0*d", length($NF), ($NF+1)%(10^length($NF))); print}'
1.2.3.5

1.2.3.9  => 1.2.4.0
1.2.3.44 => 1.2.3.45
1.2.3.99 => 1.2.4.00
1.2.3.999=> 1.2.4.000
1.2.9    => 1.3.0
999      => 1000

UPDATE:

#!/usr/bin/gawk -f

BEGIN{
    v[1] = "1.2.3.4"
    v[2] = "1.2.3.44"
    v[3] = "1.2.3.99"
    v[4] = "1.2.3"
    v[5] = "9"
    v[6] = "9.9.9.9"
    v[7] = "99.99.99.99"
    v[8] = "99.0.99.99"
    v[9] = ""

    for(i in v)
        printf("#%d: %s => %s\n", i, v[i], inc(v[i])) | "sort | column -t"
}

function inc(s,    a, len1, len2, len3, head, tail)
{
    split(s, a, ".")

    len1 = length(a)
    if(len1==0)
        return -1
    else if(len1==1)
        return s+1

    len2 = length(a[len1])
    len3 = length(a[len1]+1)

    head = join(a, 1, len1-1)
    tail = sprintf("%0*d", len2, (a[len1]+1)%(10^len2))

    if(len2==len3)
        return head "." tail
    else
        return inc(head) "." tail
}

function join(a, x, y,    s)
{
    for(i=x; i<y; i++)
        s = s a[i] "."
    return s a[y]
}

$ chmod +x inc.awk
$ ./inc.awk
#1:  1.2.3.4      =>  1.2.3.5
#2:  1.2.3.44     =>  1.2.3.45
#3:  1.2.3.99     =>  1.2.4.00
#4:  1.2.3        =>  1.2.4
#5:  9            =>  10
#6:  9.9.9.9      =>  10.0.0.0
#7:  99.99.99.99  =>  100.00.00.00
#8:  99.0.99.99   =>  99.1.00.00
#9:  =>           -1