community.windows.win_dotnet_ngen module – Runs ngen to recompile DLLs after .NET updates

Note

This module is part of the community.windows collection (version 2.4.0).

It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.windows.

To use it in a playbook, specify: community.windows.win_dotnet_ngen.

Synopsis 

After .NET framework is installed/updated, Windows will probably want to recompile things to optimise for the host.
This happens via scheduled task, usually at some inopportune time.
This module allows you to run this task on your own schedule, so you incur the CPU hit at some more convenient and controlled time.
https://docs.microsoft.com/en-us/dotnet/framework/tools/ngen-exe-native-image-generator#native-image-service
http://blogs.msdn.com/b/dotnet/archive/2013/08/06/wondering-why-mscorsvw-exe-has-high-cpu-usage-you-can-speed-it-up.aspx

Note

There are in fact two scheduled tasks for ngen but they have no triggers so aren’t a problem.
There’s no way to test if they’ve been completed.
The stdout is quite likely to be several megabytes.

- name: Run ngen tasks
  community.windows.win_dotnet_ngen:

Common return values are documented here, the following are the fields unique to this module:

Key	Description
dotnet_ngen64_eqi_exit_code integer	The exit code after running the 64-bit ngen.exe executeQueuedItems command. Returned: 64-bit ngen executable exists Sample: `0`
dotnet_ngen64_eqi_output string	The stdout after running the 64-bit ngen.exe executeQueuedItems command. Returned: 64-bit ngen executable exists Sample: `"sample output"`
dotnet_ngen64_update_exit_code integer	The exit code after running the 64-bit ngen.exe update /force command. Returned: 64-bit ngen executable exists Sample: `0`
dotnet_ngen64_update_output string	The stdout after running the 64-bit ngen.exe update /force command. Returned: 64-bit ngen executable exists Sample: `"sample output"`
dotnet_ngen_eqi_exit_code integer	The exit code after running the 32-bit ngen.exe executeQueuedItems command. Returned: 32-bit ngen executable exists Sample: `0`
dotnet_ngen_eqi_output string	The stdout after running the 32-bit ngen.exe executeQueuedItems command. Returned: 32-bit ngen executable exists Sample: `"sample output"`
dotnet_ngen_update_exit_code integer	The exit code after running the 32-bit ngen.exe update /force command. Returned: 32-bit ngen executable exists Sample: `0`
dotnet_ngen_update_output string	The stdout after running the 32-bit ngen.exe update /force command. Returned: 32-bit ngen executable exists Sample: `"sample output"`