用sed或awk更改脚本文件的一部分

I'm trying to write sed command to change my script automatically. This script is using to apply SQL patches to database based on provided version of application. For better understandings I simplify this script and source looks like

我正在尝试编写sed命令来自动更改我的脚本。此脚本用于根据提供的应用程序版本将SQL修补程序应用于数据库。为了更好地理解，我简化了这个脚本和源代码

# something before
if [ "$BRANCH" = "TRUNK" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
    apply_patch.sh trunk
elif [ "$BRANCH" = "2.0" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
elif [ "$BRANCH" = "1.0" ]
then
    apply_patch.sh 1.0
fi
# something after

Based on two input arguments (current version and next version) I need to change this script to the following

基于两个输入参数（当前版本和下一版本），我需要将此脚本更改为以下内容

# something before
if [ "$BRANCH" = "TRUNK" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
    apply_patch.sh 2.1
    apply_patch.sh trunk
elif [ "$BRANCH" = "2.1" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
    apply_patch.sh 2.1
elif [ "$BRANCH" = "2.0" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
elif [ "$BRANCH" = "1.0" ]
then
    apply_patch.sh 1.0
fi
# something after

3 个解决方案

#1

Sketch of how you might rework your logic
I will have to check up correct array syntax
but basically stop repeating and rewriting
and just add a new element to your array when patching changes

如何修改逻辑的草图我将不得不检查正确的数组语法，但基本上停止重复和重写，只需在修补更改时向数组添加新元素

ln -s trunk 99999
declare -a appver=( 1.0 2.0 2.1 99999)

for patch in  ${appver[@]} ; do
  if [ ${BRANCH} <= ${patch} ] then 
      apply_patch.sh  ${patch}
  fi
done

#2

If the version and patch numbers can be represented as decimals, then you'll probably want a helper function to compare them. There are many ways this can be done. Here is an example expanding on @tomc's "sketch":

如果版本和补丁号可以表示为小数，那么您可能需要帮助函数来比较它们。有很多方法可以做到这一点。这是一个扩展@ tomc的“草图”的例子：

#!/bin/bash

function leq {
  awk -v x="$1" -v y="$2" '
    BEGIN { if (x <= y) {exit(0)} else {exit(123)} }'
}

ln -s trunk 99999
appver=( 1.0 2.0 2.1 99999 )

BRANCH="$1"
for patch in  ${appver[@]}
do
  if leq ${BRANCH} ${patch} ; then 
    apply_patch.sh ${patch}
  fi
done

#3

Your requirements are very vague and unclear but MAYBE this is what you want:

您的要求非常模糊且不清楚，但可能是您想要的：

$ cat tst.awk
/if.*TRUNK/ { inTrunk = 1 }
inTrunk     {
    if (/elif/) {
        sub(/trunk/,new,buf)
        print buf prev

        sub(/TRUNK/,new,buf)
        print buf $0

        inTrunk = 0
    }
    else {
        buf = buf $0 ORS
        prev = $0
    }
    next
}
{ print }

。

$ awk -v new=2.1 -f tst.awk file
# something before
if [ "$BRANCH" = "TRUNK" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
    apply_patch.sh 2.1
    apply_patch.sh trunk
if [ "$BRANCH" = "2.1" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
    apply_patch.sh 2.1
elif [ "$BRANCH" = "2.0" ]
then
    apply_patch.sh 1.0
    apply_patch.sh 2.0
elif [ "$BRANCH" = "1.0" ]
then
    apply_patch.sh 1.0
fi
# something after

#1