Is there a command to set a Windows service to "Automatic (Delayed Start)"?

I remember I ran into the same issue way back when I built an Elixir app that had to run on Windows. I never automated it though. I added a manual step to the instructions for installing the app, and was content with the fact that you can set this configuration option once, and subsequent installations would keep this setting unchanged (at least, that’s what I remember).

Maybe you can parse the true service name from the output of the command you shared? Should be doable.

Just as an aside: I used these instructions to shorten the delay after which the service started. Two minutes (the default) was a bit too much for me.

Try piping that into select?

Get-Service -Displayname "myapp_myapp" | select -ExpandProperty Name -first 1

That works!

The full command I came up with:

for /f "usebackq" %s in (`powershell.exe -Command "Get-Service -Displayname myapp_myapp | Select -ExpandProperty Name -First 1"`) do sc.exe config %s start=delayed-auto

which translates to Inno Setup as:

[Run]
Filename: "{app}\bin\myapp.bat"; Parameters: "install"
Filename: "{cmd}"; \
  Parameters: "/c ""for /f ""usebackq"" %s in (`powershell.exe -Command ""Get-Service -Displayname myapp_myapp | Select -ExpandProperty Name -First 1""`) do sc.exe config %s start=delayed-auto"""; \
  Flags: runhidden