Export a Blender file to glTF from the command-line headless

export_blend_to_gltf.py

"""
This script automates the process of exporting the .glb file.
You can run this script from the command-line in a headless mode.

Example usages:

```sh
blender -b -P export_gltf.py mymodel.blend
/Applications/Blender.app/Contents/MacOS/Blender -b -P export_gltf.py "Monkey.blend"
```
"""
import bpy
import sys
# help(bpy)

# Clear all data
bpy.ops.wm.read_factory_settings(use_empty=True)

# Load the .blend file, e.g. mymodel.blend
blender_file = sys.argv[-1]
print(f'Target Blender file for glTF export: {blender_file}')
if not blender_file.endswith('.blend'):
    print('Exiting. Please provide a .blend file as input.')
    sys.exit(1)
bpy.ops.wm.open_mainfile(filepath=blender_file)

# Export to glTF. No file extension needed, it will replace it anyway.
# Default is .glb unless otherwise specified
bpy.ops.export_scene.gltf(filepath=blender_file)

print(f'Done exporting from .blend to glTF: {blender_file}')