Shell Depth part

[Lockszmith-GH]

Works in Linux

I came up with the following segment to indicate shell depth:

        {
          "type": "command",
          "foreground": "#d3d7cf",
          "background": "black",
          "powerline_symbol": "",
          "style": "powerline",
          "properties": {
            "shell": "bash",
            "command": "pstree -s $$ | head -1 | sed -r 's/-\\+-/---/g; s/-[^-]+---oh-my-posh---.*/-/; s/---/\\n/g; ' | grep -Ec \"^($( cat /etc/shells | tail +2 | sed 's/.*\\///' | sort -u | grep -v tmux | paste -sd '|' ))$\""
          },
          "template": "{{ if not ( eq .Output \"1\" ) }}{{ .Output }}{{ end }}"
        }

Question

This will work well in Linux, any idea how to make this work in Windows?
Is there a builtin section that does this?

Not part of the question

How does this work (for those finding the code in the question of interest)

I'm running a bash shell command line that counts the number of shell process names in the pstree of the current process.

• pstree -s $$ - this retrieves the root of the current process ID ($$ in bash)
• head -1 - only grab the first line (sed usually forks, and shows up as a second line, I don't need that line)
• Using sed:
  • s/-\+-/---/g; - make sure all connectors are marked as three-dashes ('---')
  • s/-[^-]+---oh-my-posh---.*/-/; - Clear everything past oh-my-posh
  • s/---/\n/g; - finally, split the list into lines.
• grep -Ec ... - Use extended-regexp (EREs) syntax, and count the number of matched lines. ... here is:
  • '"^$(...)$"' - match the entire line (whole words only), where ... here is the following that grabs all valid shell names.
    The result of this command looks something like: bash|dash|pwsh|rbash|sh|zsh
    • cat /etc/shells | tail +2 - list all valid shell names, starting with the 2nd line (1st line is just a title)
    • sed 's/.*\\///' - keep only the last part after '/'
    • sort -u - sort, and keep only unique lines
    • grep -v tmux - remove any line with tmux - I don't want to count that as a shell level
    • paste -sd '|' - combine all lines into a single string delimited by |

[Lockszmith-GH]

I ended up simplifying this process.
My shell initializes an Environment variable, and the prompt just shows the var if it's more than 1.

If anyone has another solution, I'm interested.

[SiJiL82]

I've been after something similar, been using $SHLVL
It always reports higher than running echo $SHLVL in the same terminal though - sometimes 1 higher but in VSCode terminal, 2 higher.