Better rigify selection and movement of joints that need to stay together.

Rigifys face rig always breaks when it's adjusted and outputs errors that aren't usable. I've paid someone to make an addon to fix this but it doesn't work that well. I hope it works as a proof of concept tho.

What it is supposed to do is whenever the user selects part of a joint all of them are selected so they move together and don't break.

bl_info = {
    "name": "Joint_mover",
    "author": "Vikrant Pundir",
    "version": (0, 1),
    "blender" : (3, 00, 0),
    "category": "Rigging"
}

import bpy


def main(context):
    global c
    c = bpy.context

    global rig
    rig = c.view_layer.objects.active.name

    global bone
    bone = c.active_bone.name

    global boneList
    boneList = bpy.data.armatures[rig].bones

    global act_Head
    act_Head = bpy.data.armatures[rig].bones[bone].head_local

    global act_Tail
    act_Tail = bpy.data.armatures[rig].bones[bone].tail_local


def selector(locBoneVar):
    for i in boneList:
        if locBoneVar == boneList[i.name].head_local:
            bpy.data.armatures[rig].bones[i.name].select = False
            bpy.data.armatures[rig].bones[i.name].select_head = True
            print("in head")

        if locBoneVar == boneList[i.name].tail_local:
            bpy.data.armatures[rig].bones[i.name].select = False
            bpy.data.armatures[rig].bones[i.name].select_tail = True
            print("in tail")

    print ("-----")

def sel_init():


    if boneList[bone].select_head == True:
        selector(act_Head)

    if boneList[bone].select_tail == True:
        selector(act_Tail)


class SimpleOperator(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "object.simple_operator"
    bl_label = "Simple Object Operator"

    def execute(self, context):
        print("hey")
        bpy.ops.object.mode_set(mode='OBJECT')

        main(context)
        sel_init()

        bpy.ops.object.mode_set(mode='EDIT')

        #invoke grab afe edit mode, else it will move the whole object
        bpy.ops.transform.translate('INVOKE_DEFAULT')

        return {'FINISHED'}

class addCubeSamplePreferences(bpy.types.AddonPreferences):
    bl_idname = __name__

    L_select: bpy.props.EnumProperty(
        items=[
            ('LMB', 'LMB select', '', '', 0),
            ('RMB', 'RMB select', '', '', 1)
        ],
        default='RMB'
    )

    def draw(self, context):
        layout = self.layout
        layout.label(text='Switch to Left mouse button select:')
        row = layout.row()
        row.prop(self, 'L_select', expand=True)


addon_keymaps = []
# Register and add to the "object" menu (required to also use F3 search "Simple Object Operator" for quick access).
def register():
    bpy.utils.register_class(SimpleOperator)
    bpy.utils.register_class(addCubeSamplePreferences)


    # Add the hotkey
    wm = bpy.context.window_manager
    kc = wm.keyconfigs.addon
    if kc:
        km = wm.keyconfigs.addon.keymaps.new(name='3D View', space_type='VIEW_3D')

        if bpy.context.preferences.addons['Joint_mover'].preferences.L_select == 'LMB':
            kmi = km.keymap_items.new(SimpleOperator.bl_idname, type='LEFTMOUSE', value='CLICK_DRAG')

        else:
            kmi = km.keymap_items.new(SimpleOperator.bl_idname, type='RIGHTMOUSE', value='CLICK_DRAG')
        addon_keymaps.append((km, kmi))


def unregister():
    bpy.utils.unregister_class(SimpleOperator)
    bpy.utils.register_class(addCubeSamplePreferences)

    for km, kmi in addon_keymaps:
        km.keymap_items.remove(kmi)
    addon_keymaps.clear()

if __name__ == "__main__":
    register()