How to run a PowerShell Script after Inno Setup installer

Question

I have a PowerShell script that modifies some preference files that I'm trying to have run after my Inno Setup installer is completed. Haven't found a working solution for this yet. My goal is to embed this in the file, or code, so I don't have to ship multiple files, just the installer. Thanks!

Answer 1

To execute a command after an installation finishes, add an entry to [Run] section.

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If the PowerShell code is trivial, you can executed it without any script file directly from PowerShell command-line with -Command switch:

[Run]
Filename: "powershell.exe"; Parameters: \
  "-ExecutionPolicy Bypass -Command [System.IO.File]::WriteAllText('my.ini', 'foo=1')"; \
  WorkingDir: {app}; Flags: runhidden

Regarding the -ExecutionPolicy Bypass: As you will be executing this on systems you do not control, it's likely that some/most will have the default PowerShell settings, that restricts execution of commands. To overcome that you need this switch.

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If you need a script, you need to "install" it (e.g. to a temporary folder of the installation) and run it from there.

[Files]
Source: "setup.ps1"; DestDir: "{tmp}"

[Run]
Filename: "powershell.exe"; \
  Parameters: "-ExecutionPolicy Bypass -File ""{tmp}\setup.ps1"""; \
  WorkingDir: {app}; Flags: runhidden

(the temporary folder gets automatically deleted when the installer finishes)