Powershell：仅在缺少 VATMODE 标记时才高级插入 XML 文件

Question

完整解决方案

# Description: Adds <VATMODE>X</VATMODE> XML tags to files arriving from server, underneath each RECORD CODE line.
# Script tested and works using:
#   - Powershell v5.1 on Windows 10 Pro
#   - Powershell v4.0 on Windows Server 2008 R2.
#   - Does NOT work on Powershell v2.0

# References
# My own question: https://stackoverflow.com/questions/45639945/powershell-advanced-insert-into-xml-files-only-if-vatmode-tag-is-missing
# https://stackoverflow.com/questions/31678072/insert-content-into-specific-place-in-text-file-in-powershell
# https://stackoverflow.com/questions/1875617/insert-content-into-text-file-in-powershell
# https://social.technet.microsoft.com/wiki/contents/articles/4310.powershell-working-with-regular-expressions-regex.aspx
# http://blog.danskingdom.com/fix-problem-where-windows-powershell-cannot-run-script-whose-path-contains-spaces/
# https://community.spiceworks.com/topic/857690-automatically-and-silently-bypass-execution-policy-for-a-powershell-script
# http://leelusoft.blogspot.com.ng/p/watch-4-folder-25.html
# References

# Assign the directory where the XML files arrive from the server
$xmlFilesLocation = "C:\XML_dumping\"

# Change directory. Without this, the script will run in the same directory that the script is located at, and that's wrong
cd $xmlFilesLocation

# Show the directory so we can easily look at what's going on. Comment this out if it becomes annoying.
Invoke-Item $xmlFilesLocation

# Regular expression to match RECORD CODE lines
$regEx = "(\W\w{6}\s\w{4}\W.+)"

# A String variable which contains the VATMODE XML tag
$vatModeExists = "<VATMODE>X</VATMODE>"

# Assign the VATMODE tag, preceding it with three tabs for proper indentation
$vatModeTag = "`t`t`t<VATMODE>X</VATMODE>"

# Get all XML file names in the directory
$files = Get-ChildItem -Path $xmlFilesLocation -Filter *.xml

# Count the number of all XML files in the directory
$numberOfFiles = (Get-ChildItem -Path $xmlFilesLocation -Filter *.xml | Measure-Object).Count

# First, loop through all files separately to check if <VATMODE>X</VATMODE> exists, and skip if true
for ($i=1; $i -le $numberOfFiles; $i++) {

    # Scan the contents of each file
    $content = (Get-Content $files[$i - 1] -raw)

    # If <VATMODE>X</VATMODE> is detected in the file...
    if ($content -match $vatModeExists) {
        # ...then do not process the file (skip it)
        break
    }
}

# Then, loop through all files (again) separately to check if <VATMODE>X</VATMODE> is missing, and process if true
for ($j=1; $j -le $numberOfFiles; $j++) {

    # Scan the contents of each file
    $content = (Get-Content $files[$j - 1] -raw)

    # If <VATMODE>X</VATMODE> is missing in the file...
    if ($content -notmatch $vatModeExists) {

        # ...then replace in $content the regular expression with $vatModeTag and insert it directly underneath RECORD CODE line
        $content= [regex]::replace($content, $regEx, ('$1'+"`n"+"$vatModeTag"))

        # Save the file that now has the new $vatModeTag and output it
        $content | Out-File -encoding utf8 $files[$j - 1]
    }
}

问题陈述

我正在尝试实现类似于this 的目标，但增加了复杂性。这些是每天从服务器到达的 XML 文件，它们被放入单个文件夹中以导入会计系统。除非每个 RECORD CODE 父级下有子级 <VATMODE>X</VATMODE>，否则会计系统不会导入文件。这些 XML 文件有两种可能到达：一个接一个，或者分批。它们具有不同的名称，具有不断递增的数字和不同的前缀。例如：NX1000060.xml或NX1000061.xml或ABN000028.xml等。

Powershell 脚本

# Regex to match RECORD CODE lines
$regEx = "\W\w{6}\s\w{4}\W.+"

#Regex to match exactly <VATMODE>X</VATMODE>
$vatModeExists = "\W\w{7}.\w\W{2}\w{7}."

# Assign the VATMODE tag, preceding it with three tabs for proper indentation
$vatModeTag = "`t`t`t<VATMODE>X</VATMODE>"

# Get all XML files in the directory
$files = Get-ChildItem -Path "C:\XML_dumping" -Filter *.xml

# Get the number of XML files in the directory
$numberOfFiles = (Get-ChildItem -Path "C:\XML_dumping" -Filter *.xml | Measure-Object).Count

for ($i=1; $i -lt $numberOfFiles; $i++) { # Loop through each file separately
    $content = (Get-Content $files[$i - 1]) # Scan the contents of each file
    if ($content -match $vatModeExists) { # If <VATMODE>X</VATMODE> is detected in the file...
        break # ...then do not process the file (skip it)
    }

    # Get the matched RECORD CODE lines
    $found = $content -match $regEx
    for ($j=0; $j -lt $found.Length; $j++ ) { # Loop through each matched RECORD CODE line
        echo  $found[$j] $vatModeTag # Insert <VATMODE>X</VATMODE> right under RECORD CODE line
        # save the files that now have VATMODE inserted into them, but how?
    }
}

上面的脚本应该在每个 RECORD CODE 行下附加 VATMODE 标签，如下面的输出所示。

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<EXPORT>
    <IMPORTMODEL>NEX</IMPORTMODEL>
    <SESSION>1000060</SESSION>
    <CUSTORDERS>
        <RECORD CODE="NX0100096">
        <VATMODE>X</VATMODE>
        <INPUTDATE>19/07/2017</INPUTDATE>
        <!--...and so on...-->

在 Powershell ISE 中，脚本在 echo 中运行良好（用于目视检查），但如何插入 VATMODE 并保存已添加 VATMODE 的文件？

伪代码

1. 分配正则表达式
2. 分配 VATMODE 标记
3. 获取文件列表
4. 获取文件数
5. 分别获取每个文件的内容
6. 检查 VATMODE 是否已经存在并中断
7. 否则附加 VATMODE
8. 保存获得新 VATMODE 的文件

Answer 1

我使用[regex]::replace，它对我有用。正则表达式中的括号用于检索 $1 中的值。我还在for 循环中将您的代码-lt 替换为-le。

# Regex to match RECORD CODE lines
$regEx = "\W\w{6}\s\w{4}\W.+"
$regExParen = "(\W\w{6}\s\w{4}\W.+)"
#Regex to match exactly <VATMODE>X</VATMODE>
$vatModeExists = "\W\w{7}.\w\W{2}\w{7}."

# Assign the VATMODE tag, preceding it with three tabs for proper indentation
$vatModeTag = "`t`t`t<VATMODE>X</VATMODE>"

# Get all XML files in the directory
$files = Get-ChildItem -Path "C:\Users\user1\Documents\XML_dumping" -Filter *.xml

# Get the number of XML files in the directory
$numberOfFiles = (Get-ChildItem -Path "C:\Users\user1\Documents\XML_dumping" -Filter *.xml | Measure-Object).Count
for ($i=1; $i -le $numberOfFiles; $i++) { # Loop through each file separately
    $content = (Get-Content $files[$i - 1] -raw) # Scan the contents of each file

    if ($content -match $vatModeExists) { 
    # If <VATMODE>X</VATMODE> is detected in the file...
    echo "<VATMODE>X</VATMODE>"
    break # ...then do not process the file (skip it)

}
    # replaces in $content the reg. expression with VATNUMBER
    $content= [regex]::replace($content, $regExParen, ('$1'+"`r`n"+"VATNUMBER"+"`r`n")) 
    # Insert <VATMODE>X</VATMODE> right under RECORD CODE line
    echo $content
        # save the files that now have VATMODE inserted into them, but how?
    $content | Out-File -encoding utf8 $files[$i - 1]
}

Answer 2

所以我试图想出一些东西。但是和你要求的有点不同。

# Assign the path where the XML files are getting dumped as they arrive from the server
$fileName = "*.xml"

# Assign the regular expression patterns
$regEx = "\W\w{6}\s\w{4}\W.+"
$vatModeExists = "\W\w{7}.\w\W{2}\w{7}."

# Assign the VATMODE tag, preceding it with a line break and three tabs for proper indentation
$vatModeTag = "`n`t`t`t<VATMODE>X</VATMODE>"

$Output
foreach($file in $fileName){
    if ((Get-Content $file) -notmatch $vatModeExists){
        if($file -match $regex) { # if RECORD CODE line is found
            $file += $vatModeTag # append VATMODE after each RECORD CODE line
        }
        $output += $file
    }
}
Set-Content -path SomeFile.xml -Value $output