This is a tool for mod developers.

Dumps JSON to logs before and after selected patches are made.

Rename your patch file to include .debug. in its filename to trigger dumping. For example, assets/ropeorganization/patches/ropetricks.debug.json.

Copious amounts of JSON will be dumped to your server-debug.txt and/or client-debug.txt log files.

Please make sure to rename your files back when you're done!

Example

assets/ropeorganization/patches/ropetricks.debug.json:

[
  {
    "file": "game:itemtypes/resource/rope.json",
    "op": "add",
    "path": "/creativeinventory",
    "value": {
      "made_of_plants": ["*"],
      "long_and_thin": ["*"]
    },
  }
]

Excerpt from server-debug.txt:

15.4.2021 03:29:36 [VerboseDebug] === PatchDebug === patches/ropetricks.debug.json => game:itemtypes/resource/rope.json #0 === BEFORE ===
15.4.2021 03:29:36 [VerboseDebug] {
	code: "rope",
	texture: { base: "item/resource/rope" },
	creativeinventory: { "general": ["*"], "items": ["*"] },
	maxstacksize: 16,
	materialDensity: 510
}
15.4.2021 03:29:36 [VerboseDebug] === PatchDebug === patches/ropetricks.debug.json => game:itemtypes/resource/rope.json #0 === /BEFORE ===
15.4.2021 03:29:36 [VerboseDebug] === PatchDebug === patches/ropetricks.debug.json => game:itemtypes/resource/rope.json #0 === AFTER ===
15.4.2021 03:29:36 [VerboseDebug] {
  "code": "rope",
  "texture": {
    "base": "item/resource/rope"
  },
  "creativeinventory": {
    "made_of_plants": [
      "*"
    ],
    "long_and_thin": [
      "*"
    ]
  },
  "maxstacksize": 16,
  "materialDensity": 510
}
15.4.2021 03:29:36 [VerboseDebug] === PatchDebug === patches/ropetricks.debug.json => game:itemtypes/resource/rope.json #0 === /AFTER ===

Oops! /creativeinventory got replaced, deleting "general": ["*"], "items": ["*"].

Solution

The purpose of this mod is to help identify problems, but for posterity, here is the correct way to solve the problem above of adding multiple keys:

[
  {
    "file": "game:itemtypes/resource/rope.json",
    "op": "add",
    "path": "/creativeinventory/made_of_plants",
    "value": ["*"]
  },
  {
    "file": "game:itemtypes/resource/rope.json",
    "op": "add",
    "path": "/creativeinventory/long_and_thin",
    "value": ["*"]
  }
]