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@@ -6,6 +6,7 @@
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import glob
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import json
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import os
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+import sys
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from tornado import web
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from notebook.base.handlers import IPythonHandler, FileFindHandler
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from jinja2 import FileSystemLoader
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@@ -64,6 +65,17 @@ class LabHandler(IPythonHandler):
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static_prefix = ujoin(self.base_url, PREFIX)
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labextensions = self.application.labextensions
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data = get_labextension_manifest_data_by_folder(BUILT_FILES)
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+ if 'main' not in data or 'extensions' not in data:
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+ msg = ('JupyterLab build artifacts not detected, please see ' +
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+ 'CONTRIBUTING.md for build instructions.')
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+ self.log.error(msg)
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+ self.write(self.render_template('error.html',
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+ status_code=500,
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+ status_message='JupyterLab Error',
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+ page_title='JupyterLab Error',
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+ message=msg))
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+ return
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+
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main = data['main']['entry']
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bundles = [ujoin(static_prefix, name + '.bundle.js') for name in
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['loader', 'main', 'extensions']]
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Steven Silvester