import json
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from pathlib import Path
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from django.conf import settings
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# Load manifest.json once at module scope
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_MANIFEST = {}
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try:
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# If HMR is enabled, we don't need to read the manifest as it's not used
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# All assets are served from the webpack dev server in that case
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if not settings.FRONTEND_HMR:
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manifest_path = Path(settings.STATIC_ROOT) / 'js/manifest.json'
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if manifest_path.exists():
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with open(manifest_path, 'r') as f:
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_MANIFEST = json.load(f)
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except Exception:
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# If there's any error reading the manifest, we'll use the default mapping
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pass
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def get_manifest_asset(path: str) -> str:
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"""Maps a path to its hashed filename using manifest.json, or falls back to /react-app/ prefix
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Usage in template:
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{% manifest_asset 'main.js' %}
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"""
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if path in _MANIFEST:
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return f'{settings.FRONTEND_HOSTNAME}{_MANIFEST[path]}'
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return f'{settings.FRONTEND_HOSTNAME}/react-app/{path}'
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