file_table_reader/qgis_bootstrap.py

import os
import sys

QGIS_APP = "/Applications/QGIS-LTR.app/Contents"
QGIS_PREFIX = f"{QGIS_APP}/Resources"

# ==== FIX VERY IMPORTANT ====
os.environ["QGIS_PREFIX_PATH"] = QGIS_PREFIX
os.environ["PROJ_LIB"] = f"{QGIS_PREFIX}/proj" 
os.environ["GDAL_DATA"] = f"{QGIS_PREFIX}/gdal"
os.environ["QT_PLUGIN_PATH"] = f"{QGIS_PREFIX}/plugins"
# =============================

os.environ["QT_QPA_PLATFORM"] = "offscreen"

# Python path
sys.path.append(f"{QGIS_PREFIX}/python")
sys.path.append(f"{QGIS_PREFIX}/python/plugins")

from qgis.core import QgsApplication
from qgis.analysis import QgsNativeAlgorithms

import processing
from processing.core.Processing import Processing

def start_qgis():
    qgs = QgsApplication([], False)
    qgs.initQgis()

    # === WAJIB: initialize processing ===
    Processing.initialize()
    qgs.processingRegistry().addProvider(QgsNativeAlgorithms())

    return qgs












# DEPLOYMENT
# import os
# import sys

# # QGIS environment
# os.environ["QGIS_PREFIX_PATH"] = "/usr"
# os.environ["QGIS_HOME"] = "/usr"

# os.environ["PROJ_LIB"] = "/usr/share/proj"
# os.environ["GDAL_DATA"] = "/usr/share/gdal"
# os.environ["QT_PLUGIN_PATH"] = "/usr/lib/x86_64-linux-gnu/qt5/plugins"

# os.environ["QT_QPA_PLATFORM"] = "offscreen"

# # QGIS Python plugins (THIS IS THE MISSING PART)
# sys.path.append("/usr/share/qgis/python")
# sys.path.append("/usr/share/qgis/python/plugins")

# # Python modules (from system)
# sys.path.append("/usr/lib/python3/dist-packages")
# sys.path.append("/usr/lib/python3/dist-packages/qgis")


# from qgis.core import QgsApplication
# from qgis.analysis import QgsNativeAlgorithms
# import processing
# from processing.core.Processing import Processing

# def start_qgis():
#     qgs = QgsApplication([], False)
#     qgs.initQgis()
#     Processing.initialize()
#     qgs.processingRegistry().addProvider(QgsNativeAlgorithms())
#     return qgs