Awesome, thanks for the brief explanation. So correct me if I'm wrong, func exec_command is the one which does the pipeliinig execution , which is then accepted by $input via and then call execwrapper scriptblock ?
On Friday, August 16, 2019 at 2:40:57 AM UTC+5:30, Jordan Borean wrote: > > Hi > > This particular script is part of the put_file operation for winrm [1] > which is executed like "PowerShell.exe .... -EncodedCommand ScriptB64". > Part of the put_file method is to read the bytes of the file to transfer > across and send it over the stdin pipe of the process under the WSMan Send > operation. There is an automatic trigger in PowerShell where the begin > block runs then the process block will run for each input that is sent > until we tell it there is no more until finally the end block runs. The > '$input' variable is an automatic variable which contains the input from > the stdin pipe for that process (each byte fragment of the file). > > In saying all this, the put_file operation should not be running at all > for standard module execution. We use pipelining in pretty much all cases > to execute a module and the only times put_file is used are; > > - An action plugin on the controller needs to put a file for a module > to use, e.g. win_copy, win_template, script > - The ANSIBLE_KEEP_REMOTE_FILES=1 env var is set when running Ansible, > this should only be used for debugging purposes and is not the standard > operation > > What normally happens in the pipelining scenario is that we run the > bootstrap_wrapper.ps1 [2] which takes in data from the stdin pipe to > execute. This data is a string split by null chars where the first part is > the exec_wrapper and the second part is the module manifest info which > drives the wrapper. This way no data touches the disk (unless we need to > copy a file) making things a lot faster than before. > > [1] - > https://github.com/ansible/ansible/blob/491a47c7c5be8ba5b4cca4e1a5171c15d669a47f/lib/ansible/plugins/connection/winrm.py#L565 > [2] - > https://github.com/ansible/ansible/blob/devel/lib/ansible/executor/powershell/bootstrap_wrapper.ps1 > > Thanks > > Jordan > -- You received this message because you are subscribed to the Google Groups "Ansible Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to ansible-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-devel/2be16fca-3458-464f-abb6-3cd7551ee58d%40googlegroups.com.
