Interactive TSO mode

[adam-wolfe]

Is your feature or enhancement request related to a problem or limitation? Please describe

In order to issue consecutive TSO commands on the same address space using Zowe CLI, I need to issue the first command, copy the address space, then send additional data/commands using subsequent Zowe CLI commands and using the address space from my initial command. This workflow is a bit counterintuitive for somebody using Zowe CLI in a terminal and makes it difficult to respond to TSO prompts, work with REXX scripts, etc.

Describe your enhancement idea

Add a command to the zowe zos-tso command group that starts a looping prompt that:

1. Creates an address space
2. Allows the user to enter data/commands
3. Sends the data/commands to TSO
4. Gets any output from TSO and prints it to stdout in the terminal
5. Repeats 2-4 until the user issues an interrupt (ctrl+c)
6. Stops the address space

Describe alternatives you've considered

No alternative exists within Zowe CLI. Users could build a script to do this kind of thing.

Provide any additional context

As a temporary solution, for those interested in a sample Python script (tested on Windows with Python 3.12) that provides this kind of interactive TSO behavior:

import subprocess
import shlex

# Note: Zowe CLI must be running in daemon mode

# Execute a console command defined by the cmd parameter and returns the command output (stdout)
def issue_cmd(cmd: str) -> str:
    return subprocess.run(shlex.split(cmd), stdout=subprocess.PIPE).stdout.decode('utf-8').strip()

# Initialize a TSO address space
key = issue_cmd("zowe tso start as --sko")

if(key != ''): # Confirm that we have an address space key
    try:
        while(1): # Loop until we receive a keyboard interrupt (CTRL+C)
            print(issue_cmd('zowe tso send as ' + key + ' --data "' + input('> ') + '"'))
    except KeyboardInterrupt:
        print('Got keyboard interrupt. Stopping address space...')
        issue_cmd('zowe tso stop as ' + key) # Stop the address space
else:
    print('Failed to initialize TSO address space. Exiting...')

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