PowerShell5将index [0]设置为字符串的第一个实例，将index [1]设置为第二个实例，依此类推，直到在6800行Windows10批处理文件中完成

Question

Powershell5脚本使Windows 10批处理文件中的特殊字符阻塞，还是我的代码从根本上错了？

解析6800行Windows 10批处理文件，找到字符串{LINE2 1-9999}，并将{1-9999}替换为代码所在的行号，重新编写批处理文件。 {LINE2 1-9999}有54个实例。 如果我分析整个批处理，则输出前54行，其中没有一个包含字符串。

$lines = sls "LINE2" $env:windir\_61.bat | Select-Object -ExpandProperty LineNumber
gc $env:windir\_61.bat -OutVariable Content
$output = for ($index = 0; $index -lt $lines.count; $index++) {
$Content[$index] -replace "LINE2.*", "LINE2 $($lines[$index])"
} 
$output | sc "$env:TEMP\somebadhat.bat"

如果_61.bat是：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1243 
TITLE %TIME%   DOC/SET YQJ8   LINE2 1887 
SET ztitle=%TIME%: WINFOLD   LINE2 2557 
TITLE %TIME%   _*.* IN WINFOLD   LINE2 2597 
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 3672 
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4922 

结果：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1
TITLE %TIME%   DOC/SET YQJ8   LINE2 2
SET ztitle=%TIME%: WINFOLD   LINE2 3
TITLE %TIME%   _*.* IN WINFOLD   LINE2 4
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 5
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 6 

如果_61.bat是：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1243
TITLE %TIME%   DOC/SET YQJ8   LINE2 1887
SET ztitle=%TIME%: WINFOLD   LINE2 2557
TITLE %TIME%   _*.* IN WINFOLD   LINE2 2597
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 3672
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4922
:: Microsoft Windows [Version 10.0.17134.345] 64-BIT
@ECHO OFF 
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4923

结果：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1
TITLE %TIME%   DOC/SET YQJ8   LINE2 2
SET ztitle=%TIME%: WINFOLD   LINE2 3
TITLE %TIME%   _*.* IN WINFOLD   LINE2 4
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 5
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 6
:: Microsoft Windows [Version 10.0.17134.345] 64-BIT
@ECHO OFF

---

TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4923

不见了。

@有30个实例。 例如：

SET p= & title NetFix v1.0a by Giovanni Heward (g@utahjrs.com) complete!
%PROGRAMFILES%\7-Zip\7z.exe" u -t7z -x@"%WINDIR%\_exclude7z.txt"

那是问题所在吗？ 我用什么代替它？ 为什么，如果我解析整个文件，该文件具有该字符串的54个实例，它将输出54行，而其中的任何一行都不包含该字符串？ 我的代码有根本上的错误吗？

Answer 1

您的脚本只会解析输入脚本中包含“ LINE2 nnnn”标记的行数。 因此，在上面的第二个输入示例中，在9行输入中，只有7行包含“ LINE2 nnnn”，因此仅处理了前7行。 原因是这样的：

$lines = sls "LINE2" c:\temp\_61.bat | Select-Object -ExpandProperty LineNumber

该行包含所有包含匹配文本的$lines的数组，因此$lines是7个整数的数组。 在后面的for循环中，您仅迭代了许多项：

$output = for ($index = 0; $index -lt $lines.count; $index++) {

您实际上并不需要$lines数组，只需在内容上使用循环索引来确定行号：

gc $env:windir\_61.bat -OutVariable Content 
$output = for ($index = 0; $index -lt $Content.count; $index++) {
$Content[$index] -replace "LINE2.*", "LINE2 $($index)"
} 
$output | sc "$env:TEMP\somebadhat.bat"

请注意，您可以通过删除临时变量，通过管道推送所有数据来稍微清理一下脚本：

gc $env:windir\_61.bat | foreach -begin {$lc = 1} -process {
    $_ -replace "LINE2 \d*", "LINE2 $lc";
    $lc += 1
} | out-file "$env:TEMP\somebadhat.bat"

Answer 2

只是为了可视化Select-String返回什么以及如何替换基于索引的文件内容中的行号（zdan的方法效率更高）

## Q:\Test\2019\02\15\SO_54712715.ps1
$FilePath = '.\_61v2.bat'
$FileContent = Get-Content $FilePath
$FileMatches = Select-String -Path $FilePath -Pattern '(?<=LINE2 )\d+\s?$'

ForEach ($FM in $FileMatches){
   "{0}:{1} [{2}=>{0}]" -f $FM.LineNumber,$FM.Line,$FM.Matches.Value
   $FileContent[$FM.LineNumber-1] = $FM.Line.Replace($FM.Matches.Value,$FM.LineNumber)
}
$FileContent | Set-Content $FilePath

样本输出：

> Q:\Test\2019\02\15\SO_54712715.ps1
1:TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1243 [1243=>1]
2:TITLE %TIME%   DOC/SET YQJ8   LINE2 1887 [1887=>2]
3:SET ztitle=%TIME%: WINFOLD   LINE2 2557 [2557=>3]
4:TITLE %TIME%   _*.* IN WINFOLD   LINE2 2597 [2597=>4]
5:TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 3672 [3672=>5]
6:TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4922 [4922=>6]
9:TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4923 [4923=>9]

和生成的文件内容（上述bat的版本2）

> gc .\_61v2.bat
TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1
TITLE %TIME%   DOC/SET YQJ8   LINE2 2
SET ztitle=%TIME%: WINFOLD   LINE2 3
TITLE %TIME%   _*.* IN WINFOLD   LINE2 4
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 5
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 6
:: Microsoft Windows [Version 10.0.17134.345] 64-BIT
@ECHO OFF
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 9