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March 18, 2021 14:19
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Powershell Self-Modification
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| #region SAVE_RUNTIME | |
| #region SELFMODIFICATION | |
| $NewLastRunTime = '18/03/2021 14:51:46' #MODIFY_HERE | |
| #region SELFMODIFICATION | |
| $LastRunTime = [datetime]::Parse($NewLastRunTime) | |
| $Me = $MyInvocation.MyCommand.Source | |
| $Myself = Get-Content $Me | |
| $Myself ` | |
| | Foreach-Object -Process {$_ -creplace '^\$NewLastRunTime.*#MODIFY_HERE$',("`$NewLastRunTime = '{0}' #MODIFY_HERE" -f [datetime]::now.ToString())} ` | |
| | Set-Content $Me -Encoding utf8 | |
| Remove-Variable -Name Myself,Me | |
| #endregion SAVE_RUNTIME |
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Didn't want to save my last run time in a separate file. Remembered a lesson about self modifying programs from my IBM-360 Assembler times. This way the script holds its own last run time and cannot be lost (as long as you don't loose the script).