Run Job Webhook Plugin - options set from JSON become invalid JSON strings

[jyanko]

Describe the bug

When Run Job webhook handler sets an option variable (ie: RD_OPTION_FILES_ADDED) from an incoming JSON payload, quotes around the items in a list appear to be lost, resulting in a string that is un-parsable by downstream json utilities (ie: python's json.loads(json_string)).

Sample input JSON

{
  "head_commit": {
    "added": [
      "file1.txt",
      "file2.txt"
    ]
  }
}

Sample output (string value stored in RD_OPTION_FILES_ADDED variable)

[file1.txt,file2.txt]

Attempting to parse the string stored in the RD_OPTION variable fails due to the missing quotes, similar to the following example

❯ VAR='[file1.txt,file2.txt]'
❯ echo $VAR | jq .
parse error: Invalid literal at line 1, column 11

❯ VAR='["file1.txt","file2.txt"]'
❯ echo $VAR | jq .
[
  "file1.txt",
  "file2.txt"
]

My Rundeck detail

• Rundeck version: 4.15.0-20230725
• install type: docker
• OS Name/version: ubuntu 20.04
• DB Type/version: mysql

To Reproduce
Steps to reproduce the behavior:

1. create a webhook which uses the 'Run Job' handler, and sets an RD_OPTION variable from a list element from the incoming json payload
2. in a job step, attempt to parse the resulting RD_OPTION var that was created with a json utility such as jq or python's json.loads(json_string)
3. send payload to the webhook like {"head_commit": {"added": ["file1.txt","file2.txt"]}}
4. observe job results:
   a. RD_OPTION var that was set does not contain the quotes around list items
   b. job fails due to failure to parse json string

Expected behavior
Expect that the RD_OPTION value actually be the captured string - including any quotes it had to start with

Screenshots
If applicable, add screenshots to help explain your problem.

For a payload including list of files as follows...
{"head_commit": {"modified": ["usr-behavior-aggregation/github-notification/pr_reminder.py"]}}

The results as seen in Rundeck UI for the values captured appear as follows...

Desktop (please complete the following information):

• OS: macOS v13.6.4
• Browser: Chrome
• Version: 122.0.6261.94 (Official Build) (arm64)

Additional context
n/a