Powershell – 输出版本号前格式化它

huangapple
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英文:

Powershell - format version number before outputting it

问题

以下是代码部分的翻译：

  1. function ConvertFrom-FixedColumnTable {
  2.   [CmdletBinding()]
  3.   param(
  4.     [Parameter(ValueFromPipeline)] [string] $InputObject
  5.   )
  6.   
  7.   begin {
  8.     Set-StrictMode -Version 1
  9.     $lineNdx = 0
  10.   }
  11.   
  12.   process {
  13.     $lines = 
  14.       if ($InputObject.Contains("`n")) { $InputObject.TrimEnd("`r", "`n") -split '\r?\n' }
  15.       else { $InputObject }
  16.     foreach ($line in $lines) {
  17.       ++$lineNdx
  18.       if ($lineNdx -eq 1) { 
  19.         # 头部行
  20.         $headerLine = $line 
  21.       }
  22.       elseif ($lineNdx -eq 2) { 
  23.         # 分隔行
  24.         # 获取字段开始的索引。
  25.         $fieldStartIndices = [regex]::Matches($headerLine, '\b\S').Index
  26.         # 计算字段长度。
  27.         $fieldLengths = foreach ($i in 1..($fieldStartIndices.Count-1)) { 
  28.           $fieldStartIndices[$i] - $fieldStartIndices[$i - 1] - 1
  29.         }
  30.         # 获取列名
  31.         $colNames = foreach ($i in 0..($fieldStartIndices.Count-1)) {
  32.           if ($i -eq $fieldStartIndices.Count-1) {
  33.             $headerLine.Substring($fieldStartIndices[$i]).Trim()
  34.           } else {
  35.             $headerLine.Substring($fieldStartIndices[$i], $fieldLengths[$i]).Trim()
  36.           }
  37.         } 
  38.       }
  39.       else {
  40.         # 数据行
  41.         $oht = [ordered] @{} # 用于对象构造的有序帮助哈希表。
  42.         $i = 0
  43.         foreach ($colName in $colNames) {
  44.           $oht[$colName] = 
  45.             if ($fieldStartIndices[$i] -lt $line.Length) {
  46.               if ($fieldLengths[$i] -and $fieldStartIndices[$i] + $fieldLengths[$i] -le $line.Length) {
  47.                 $line.Substring($fieldStartIndices[$i], $fieldLengths[$i]).Trim()
  48.               }
  49.               else {
  50.                 $line.Substring($fieldStartIndices[$i]).Trim()
  51.               }
  52.             }
  53.           ++$i
  54.         }
  55.         # 将帮助哈希表转换为对象并输出它。
  56.         [pscustomobject] $oht
  57.       }
  58.     }
  59.   }
  60. }
  62.   
  63. [Console]::OutputEncoding = [System.Text.UTF8Encoding]::new() 
  65. (winget list --name "ourSoft") -match '^(\p{L}|-)' | # 过滤掉进度显示行
  66. ConvertFrom-FixedColumnTable |    # 解析输出为对象
  67. Select-Object -Property Name, Version | # 仅显示名称和版本
  68. Sort-Object Name |                  # 按名称属性（列）排序
  69. Format-Table                      # 以表格形式显示对象

以下是第二个代码部分的翻译：

  1. function ModifyVersionNumber {	
  2. 	$VersionNumber = Select-Object -Property Version
  3. 	$CharArray = $VersionNumber.Split(".")
  4. 	$ModifiedCharArray = $CharArray[0] + "." + $CharArray[1] + "." + $CharArray[3] + "." + $CharArray[2]
  5. 	$ModifiedCharArray	
  6. }
  7.   
  8. [Console]::OutputEncoding = [System.Text.UTF8Encoding]::new() 
  10. (winget list --name "ourSoft") -match '^(\p{L}|-)' | # 过滤掉进度显示行
  11. ConvertFrom-FixedColumnTable |    # 解析输出为对象 
  12. ModifyVersionNumber | 
  13. Select-Object -Property Name, Version | # 仅显示名称和版本
  14. Sort-Object Name |                  # 按名称属性（列）排序
  15. Format-Table                      # 以表格形式显示对象

希望这些翻译对你有所帮助。

英文:

I am trying to write a script, which will return a formatted version number.

However: due to winget outputting text, I have to first convert it to object, using the

Then I can get rid of the ID, which I have no use for and display only name and version.

Here's the code, taken from this answer:

  1. function ConvertFrom-FixedColumnTable {
  2.   [CmdletBinding()]
  3.   param(
  4.     [Parameter(ValueFromPipeline)] [string] $InputObject
  5.   )
  6.   
  7.   begin {
  8.     Set-StrictMode -Version 1
  9.     $lineNdx = 0
  10.   }
  11.   
  12.   process {
  13.     $lines = 
  14.       if ($InputObject.Contains("`n")) { $InputObject.TrimEnd("`r", "`n") -split '\r?\n' }
  15.       else { $InputObject }
  16.     foreach ($line in $lines) {
  17.       ++$lineNdx
  18.       if ($lineNdx -eq 1) { 
  19.         # header line
  20.         $headerLine = $line 
  21.       }
  22.       elseif ($lineNdx -eq 2) { 
  23.         # separator line
  24.         # Get the indices where the fields start.
  25.         $fieldStartIndices = [regex]::Matches($headerLine, '\b\S').Index
  26.         # Calculate the field lengths.
  27.         $fieldLengths = foreach ($i in 1..($fieldStartIndices.Count-1)) { 
  28.           $fieldStartIndices[$i] - $fieldStartIndices[$i - 1] - 1
  29.         }
  30.         # Get the column names
  31.         $colNames = foreach ($i in 0..($fieldStartIndices.Count-1)) {
  32.           if ($i -eq $fieldStartIndices.Count-1) {
  33.             $headerLine.Substring($fieldStartIndices[$i]).Trim()
  34.           } else {
  35.             $headerLine.Substring($fieldStartIndices[$i], $fieldLengths[$i]).Trim()
  36.           }
  37.         } 
  38.       }
  39.       else {
  40.         # data line
  41.         $oht = [ordered] @{} # ordered helper hashtable for object constructions.
  42.         $i = 0
  43.         foreach ($colName in $colNames) {
  44.           $oht[$colName] = 
  45.             if ($fieldStartIndices[$i] -lt $line.Length) {
  46.               if ($fieldLengths[$i] -and $fieldStartIndices[$i] + $fieldLengths[$i] -le $line.Length) {
  47.                 $line.Substring($fieldStartIndices[$i], $fieldLengths[$i]).Trim()
  48.               }
  49.               else {
  50.                 $line.Substring($fieldStartIndices[$i]).Trim()
  51.               }
  52.             }
  53.           ++$i
  54.         }
  55.         # Convert the helper hashable to an object and output it.
  56.         [pscustomobject] $oht
  57.       }
  58.     }
  59.   }
  60.   
  61. }
  63.   
  64. [Console]::OutputEncoding = [System.Text.UTF8Encoding]::new() 
  66. (winget list --name "ourSoft") -match '^(\p{L}|-)' | # filter out progress-display lines
  67. ConvertFrom-FixedColumnTable |    # parse output into objects
  68. Select-Object -Property Name, Version | # show only Name and Version
  69. Sort-Object Name |                  # sort by the Name property (column)
  70. Format-Table                      # display the objects in tabular format

I am trying to do the last step, which will return a version number different in what is stored in OS:

  • 5.4.33676.0 - stored number in OS

  • 5.4.0.33676 - what I want to return (part 3 and 4, divided by a dot, are swapped)

Is there any way to do that?

I am trying to write my own function for that, but it seems CharArray is not filling up + I don´t know how to make the piped output display the modified numbers instead of the former ones:

  1. function ModifyVersionNumber {	
  2. 	$VersionNumber = Select-Object -Property Version
  3. 	$CharArray =$VersionNumber.Split(".")
  4. 	$ModifiedCharArray = $CharArray[0] + "." + $CharArray[1] + "." + $CharArray[3] + "." + $CharArray[2]
  5. 	$ModifiedCharArray	
  6. }
  7.   
  8. [Console]::OutputEncoding = [System.Text.UTF8Encoding]::new() 
  10. (winget list --name "ourSoft") -match '^(\p{L}|-)' | # filter out progress-display lines
  11. ConvertFrom-FixedColumnTable |    # parse output into objects 
  12. ModifyVersionNumber | 
  13. Select-Object -Property Name, Version | # show only Name and Version
  14. Sort-Object Name |                  # sort by the Name property (column)
  15. Format-Table                      # display the objects in tabular format

答案1

得分: 2

如果我尝试运行您提供的函数来处理测试对象，我会得到为什么它不起作用的线索：

  1. $o = [pscustomobject]@{version = '5.4.0.33676'};
  2. $o | ModifyVersionNumber;

给我返回的信息是：

  1. 无法对空值表达式调用方法。
  2. 在行:3字符:5
  3. +     $CharArray =$VersionNumber.Split(""."")
  4. +     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  5.     + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
  6.     + FullyQualifiedErrorId : InvokeMethodOnNull
  8. 无法索引到空数组。
  9. 在行:4字符:5
  10. +     $ModifiedCharArray = $CharArray[0] + ""."" + $CharArray[1] + ""."" +  ...
  11. +     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  12.     + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
  13.     + FullyQualifiedErrorId : NullArray

初始的 select-object 没有任何可操作的内容。我重新编写了该函数以从管道中获取参数，并且对于我的测试案例可以正常工作：

  1. function ModifyVersionNumber {
  2.     param ([parameter(ValueFromPipeline = $true)]$Versions)
  3.     process{
  4.         foreach ($obj in $Versions) {
  5.             $VersionNumber = $obj.Version;
  6.             $CharArray =$VersionNumber.Split(""."")
  7.             $ModifiedCharArray = $CharArray[0,1,3,2] -join '.'
  8.             $obj.Version = $ModifiedCharArray;
  9.             $obj;
  10.         }
  11.     }
  12. }

另外，请考虑以下内容：$ary = @(1,2,3,4); $ary[0,1,3,2] -join '.' 可以帮助大大减少您重新组装版本字符串的代码。

英文:

If I try to run your function as provided against a test object, I get a clue as to why it's not working:

  1. $o = [pscustomobject]@{version = '5.4.0.33676'};
  2. $o | ModifyVersionNumber;

gives me:

  1. You cannot call a method on a null-valued expression.
  2. At line:3 char:5
  3. +     $CharArray =$VersionNumber.Split(".")
  4. +     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  5.     + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
  6.     + FullyQualifiedErrorId : InvokeMethodOnNull
  8. Cannot index into a null array.
  9. At line:4 char:5
  10. +     $ModifiedCharArray = $CharArray[0] + "." + $CharArray[1] + "." +  ...
  11. +     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  12.     + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
  13.     + FullyQualifiedErrorId : NullArray

That initial select-object doesn't have anything to operate on. I rewrote the function to take a parameter from the pipeline and it works for my test case:

  1. function ModifyVersionNumber {
  2.     param ([parameter(ValueFromPipeline = $true)]$Versions)
  3.     process{
  4.         foreach ($obj in $Versions) {
  5.             $VersionNumber = $obj.Version;
  6.             $CharArray =$VersionNumber.Split(".")
  7.             $ModifiedCharArray = $CharArray[0,1,3,2] -join '.'
  8.             $obj.Version = $ModifiedCharArray;
  9.             $obj;
  10.         }
  11.     }
  12. }

Also, for your consideration: $ary = @(1,2,3,4); $ary[0,1,3,2] -join '.' would help to significantly reduce the code where you're re-assembling the version string.

答案2

得分: 0

有多种方法可以处理这个问题。您可以将版本字符串拆分为其各个组件，然后手动按正确的顺序将它们组合在一起：

  1. $version = '5.4.33676.0'
  2. $major, $minor, $build, $revision = $version.Split('.')
  3. $version = $major, $minor, $revision, $build -join '.'

或者您可以使用 -replace 正则表达式运算符来替换最后两个组件：

  1. $version = '5.4.33676.0'
  2. $version = $version -split '\.(\d+)\.(\d+)$', '.$2.$1'
英文:

There's a number of ways to go about this. You could split the version string into its individual components and then manually join them together in the right order:

  1. $version = '5.4.33676.0'
  2. $major,$minor,$build,$revision = $version.Split('.')
  3. $version = $major,$minor,$revision,$build -join '.'

Or you could use the -replace regex operator to replace the two last components with eachother:

  1. $version = '5.4.33676.0'
  2. $version = $version -split '\.(\d+)\.(\d+)$', '.$2.$1'

huangapple
  • 本文由 发表于 2023年8月11日 00:09:47
  • 转载请务必保留本文链接：https://go.coder-hub.com/76877546.html
  • powershell
  • split
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