Forest files cannot be referenced by world launched by the ros driver

[andyblarblar]

Describe the Bug My project (which lives inside a ros package) has the following strucuture:

.
├── controllers
├── libraries
├── plugins
│   ├── physics
│   ├── remote_controls
│   └── robot_windows
├── protos
│   ├── Phoenix.proto
│   └── Phoenix_textures
└── worlds
    ├── forest
    │   ├── -745.forest
    │   ├── -759.forest
    │   └── -767.forest
    └── purdue_track.wbt

and forests inside the world file like:

...
Forest {
  shape [
    -156.84 -82.94,     -119.93 14.02,     -111.24 86.07,     -148.15 -2.28,     -156.84 -82.94,
]
 type "birch tree"
  treesFiles [
    "forest/-767.forest"
  ]
}
...

When opening the world file in webots normally, everything works fine. However, when launching the world file using the WebotsLauncher class, the forests cannot be found by the world. Error: ERROR: JavaScript error: could not open file: /tmp/forest/-745.forest.. Interestingly, the protos, which are also referenced with a relitive path, are found correctly. I am installing the entire webots project to the shared folder.

Steps to Reproduce

1. Create a webots world with a forest, and a forests directory alongside the world
2. Launch the world using the ros2 launch file
3. View error in console

Expected behavior Forests can be found by worlds launched by ROS

Affected Packages List of affected packages:

• webots_ros2_driver

System

• Webots Version: 2023b
• ROS Version: Humble
• Operating System: Ubuntu 22.04
• Graphics Card: Intel integrated

[andyblarblar]

Fixed by #865