Support importing/exporting all user-created data lake variables

[rafaellehmkuhl]

New feature

This patch adds the possibility of exporting and importing data-lake variables from the Tools menu.

Tests Required to Merge (by dev and/or testers)

• Create some data-lake variables from the Tools menu
• Test exporting and importing them
• Test exporting and importing Cockpit Actions (routine was changed to use a common implementation)
• Test exporting and importing a DIY widget (routine was changed to use a common implementation)
• Test exporting and importing a Cockpit Settings (routine was changed to use a common implementation)

Fix #2000

[rafaellehmkuhl]

@ES-Alexander @ArturoManzoli could you take a look at this one?

[ArturoManzoli]

• Running on Electron, I downloaded the file and then clicked to delete the camera-zoom data-lake variable. Both zoom and focus variables were automatically deleted (was supposed to be like this?).
• Rebooted Cockpit and tried to import those from the file.
• The following error ocurred (no console message tho):

File contents:

{
  "variables": [],
  "values": {},
  "transformingFunctions": [
    {
      "name": "Camera Zoom",
      "id": "camera-zoom",
      "type": "number",
      "expression": "const zoom = {{camera-zoom-increase}} - {{camera-zoom-decrease}}\nreturn zoom < 0.05 && zoom > -0.05 ? 0 : Math.max(Math.min(1, zoom), -1)\n",
      "description": "Used to control the camera zoom. The value is the difference between {{camera-zoom-increase}} and {{camera-zoom-decrease}}."
    },
    {
      "name": "Camera Focus",
      "id": "camera-focus",
      "type": "number",
      "expression": "const focus = {{camera-focus-increase}} - {{camera-focus-decrease}}\nreturn focus < 0.05 && focus > -0.05 ? 0 : Math.max(Math.min(1, focus), -1)\n",
      "description": "Used to control the camera focus. The value is the difference between {{camera-focus-increase}} and {{camera-focus-decrease}}."
    }
  ],
  "exportDate": "2025-08-08T19:03:47.120Z",
  "version": "1.0"
}

[rafaellehmkuhl]

• Running on Electron, I downloaded the file and then clicked to delete the camera-zoom data-lake variable. Both zoom and focus variables were automatically deleted (was supposed to be like this?).

• Rebooted Cockpit and tried to import those from the file.

• The following error ocurred (no console message tho):

Can you check with other than those variables as well? Because the camera variables are automatically added so it may be something specifically to them. I will check nonetheless.

[ArturoManzoli]

It seems to be working, just need some reactivity fix, I think:

• Created 2 variables, rebooted (after creation the variables didn't show up on the table);
• After reboot, the variables were there (1);
• Exported the file with the new variables (3);
• Deleted the first on the top, then the other (shoryuken). When deleted this last one, both camera and focus disappeard. Rebooted cockpit and zoom and focus were back there on the table;
• Deleted zoom, and focus was automatically deleted with it. Rebooted and both were indeed gone;
• With a fresh table, imported the file and the following snackbar showed up (2);
• No imported variables showed up on the table, but after a reboot the 4 exported/imported were there as in (1).

(1)

(2)

(3)

{
  "variables": [
    {
      "id": "hadouken",
      "name": "Hadouken",
      "type": "number",
      "description": "Testing variable",
      "persistent": true,
      "persistValue": true,
      "allowUserToChangeValue": true
    }
  ],
  "values": {
    "hadouken": 666
  },
  "transformingFunctions": [
    {
      "name": "Camera Zoom",
      "id": "camera-zoom",
      "type": "number",
      "expression": "const zoom = {{camera-zoom-increase}} - {{camera-zoom-decrease}}\nreturn zoom < 0.05 && zoom > -0.05 ? 0 : Math.max(Math.min(1, zoom), -1)\n",
      "description": "Used to control the camera zoom. The value is the difference between {{camera-zoom-increase}} and {{camera-zoom-decrease}}."
    },
    {
      "name": "Camera Focus",
      "id": "camera-focus",
      "type": "number",
      "expression": "const focus = {{camera-focus-increase}} - {{camera-focus-decrease}}\nreturn focus < 0.05 && focus > -0.05 ? 0 : Math.max(Math.min(1, focus), -1)\n",
      "description": "Used to control the camera focus. The value is the difference between {{camera-focus-increase}} and {{camera-focus-decrease}}."
    },
    {
      "name": "Shoryuken",
      "id": "shoryuken",
      "type": "number",
      "expression": "// Example 1:\n2 * {{ cockpit-memory-usage }} + 100\n\n// Example 2:\nif ({{ cockpit-memory-usage }} > 100) {\n  return 'on'\n}\nreturn 'off'\n\n// Example 3:\nreturn {{ cockpit-memory-usage }} > 100\n",
      "description": "Testing 2"
    }
  ],
  "exportDate": "2025-08-08T19:41:51.376Z",
  "version": "1.0"
}

[rafaellehmkuhl]

It seems to be working, just need some reactivity fix, I think:

• Created 2 variables, rebooted (after creation the variables didn't show up on the table);
• After reboot, the variables were there (1);
• Exported the file with the new variables (3);
• Deleted the first on the top, then the other (shoryuken). When deleted this last one, both camera and focus disappeard. Rebooted cockpit and zoom and focus were back there on the table;
• Deleted zoom, and focus was automatically deleted with it. Rebooted and both were indeed gone;
• With a fresh table, imported the file and the following snackbar showed up (2);
• No imported variables showed up on the table, but after a reboot the 4 exported/imported were there as in (1).

Interesting!

I will test that in master as well. Seems to me that there's a bug around the delete logic. Thanks!

[ArturoManzoli]

@rafaellehmkuhl I was taking a look on this one today, and it seems to still have some issues on refreshing the table data after a import operation.
I exported, deleted and imported, all of that with a reboot between operations. It all worked, although with some error/success snackbar messages.
The main problem is that the imported variables do not show on the table without a Cockpit reboot

[rafaellehmkuhl]

@rafaellehmkuhl I was taking a look on this one today, and it seems to still have some issues on refreshing the table data after a import operation. I exported, deleted and imported, all of that with a reboot between operations. It all worked, although with some error/success snackbar messages. The main problem is that the imported variables do not show on the table without a Cockpit reboot

Yup. I didn't fix that one yet.