Incompatible with Blender 4.2

[smlpt]

I tried to run the addon installer on a portable Blender 4.2 instance, but it threw the error:

Exception

java.lang.RuntimeException: Installation of the dependencies for the mastodon_blender_view addon failed:
Looking in links: c:\Users\pantze28\AppData\Local\Temp\tmp3jkh76fh
Requirement already satisfied: setuptools in c:\software\blender-4.2.0-windows-x64\4.2\python\lib\site-packages (63.2.0)
Requirement already satisfied: pip in c:\software\blender-4.2.0-windows-x64\4.2\python\lib\site-packages (23.2.1)
Blender 4.2.0 (hash a51f293548ad built 2024-07-16 06:29:33)

Blender quit

	at org.mastodon.blender.setup.BlenderSetupUtils.installAddon(BlenderSetupUtils.java:66)
	at org.mastodon.blender.setup.BlenderSetupController.installAddonThread(BlenderSetupController.java:126)
	at java.lang.Thread.run(Thread.java:750)

Trying the same with a portable Blender 4.1 works fine.

[maarzt]

@smlpt Thank you for the reporting the issue. The Mastodon Blender View plugin installs a view packages into Blender. Here it seems the installation script fails because in Blender 4.2 "setuptools" and "pip" are already installed. I think the problem can be easily solved with a few modifications to the install script. It should test if a package is installed before trying to install it. I will look into this.

[maarzt]

I tried to reproduce the problem on my machine. But both Blender 4.2.0 and 4.2.1 works fine. I'm using linux / ubuntu so maybe it is windows specific. I don't know. But this mean it will be a lot identify the problem.

My assumption that there is a problem with already installed packages also appears to be wrong. I get the same warnings:

Requirement already satisfied: setuptools in c:\software\blender-4.2.0-windows-x64\4.2\python\lib\site-packages (63.2.0)
Requirement already satisfied: pip in c:\software\blender-4.2.0-windows-x64\4.2\python\lib\site-packages (23.2.1)

But for me the installation works fine.

[maarzt]

@smlpt Could you help me debug the problem, please. Could you try to execute this script (install_addon.py) in Blender 4.2. Something like: > blender.exe --background --python install_addon.py should do the trick. The interesting part is whether or not blender prints "dependencies installed" and if there are other error messages.

[maarzt]

We failed to reproduce the problem even on another Windows machine. @smlpt Could you try again. Is there something that might be different on your machine?

[smlpt]

Running the addon with mobile Blender 4.1 gives me this:

Details

Blender 4.1.1 (hash e1743a0317bc built 2024-04-15 23:33:30)
Read prefs: "C:\Users\pantze28\AppData\Roaming\Blender Foundation\Blender\4.1\config\userpref.blend"
Looking in links: c:\Users\pantze28\AppData\Local\Temp\tmpygd8oj__
Requirement already satisfied: setuptools in c:\software\blender-4.1.1-windows-x64\4.1\python\lib\site-packages (63.2.0)
Requirement already satisfied: pip in c:\software\blender-4.1.1-windows-x64\4.1\python\lib\site-packages (23.2.1)

[notice] A new release of pip is available: 23.2.1 -> 24.2
[notice] To update, run: C:\Software\blender-4.1.1-windows-x64\4.1\python\bin\python.exe -m pip install --upgrade pip
dependencies installed
Traceback (most recent call last):
  File "C:\Users\pantze28\Pictures\install_addon.py", line 73, in <module>
    addon_zip = argv[argv.index('--') + 1]
                     ^^^^^^^^^^^^^^^^
ValueError: '--' is not in list

Blender quit

When I run it with portable v4.2.1, I get:

Details

Blender 4.2.1 LTS (hash 396f546c9d82 built 2024-08-19 11:29:52)
Looking in links: c:\Users\pantze28\AppData\Local\Temp\tmpedlc_fbu
Requirement already satisfied: setuptools in c:\software\blender-4.2.1-windows-x64\4.2\python\lib\site-packages (63.2.0)
Requirement already satisfied: pip in c:\software\blender-4.2.1-windows-x64\4.2\python\lib\site-packages (23.2.1)

[notice] A new release of pip is available: 23.2.1 -> 24.2
[notice] To update, run: C:\Software\blender-4.2.1-windows-x64\4.2\python\bin\python.exe -m pip install --upgrade pip
Traceback (most recent call last):
  File "C:\Users\pantze28\Pictures\install_addon.py", line 61, in <module>
    import bidict
ModuleNotFoundError: No module named 'bidict'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\pantze28\Pictures\install_addon.py", line 66, in <module>
    raise Exception("dependency installation failed")
Exception: dependency installation failed

Blender quit

When trying to install the addon from the Mastodon setup window, I get the same error as already shared in the original post.