FormatCBFMiniEigerChessID7B2 (#649)

newsfragments/649.feature

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+Add CBFMini support for the EIGER2 16M detector at CHESS beamline ID7B2, which has an inverted rotation axis.

src/dxtbx/format/FormatCBFMiniEigerChessID7B2.py

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+from __future__ import annotations
+
+import sys
+
+from dxtbx.format.FormatCBFMiniEiger import FormatCBFMiniEiger
+
+
+class FormatCBFMiniEigerChessID7B2(FormatCBFMiniEiger):
+    """A class for reading mini CBF format Eiger16M images for S/N E-32-0123
+    installed at CHESS ID7B2, which has an inverted goniometer axis."""
+
+    @staticmethod
+    def understand(image_file):
+        """Check to see if this looks like an Eiger mini CBF format image,
+        i.e. we can make sense of it."""
+
+        header = FormatCBFMiniEiger.get_cbf_header(image_file)
+        for record in header.split("\n"):
+            if "# Detector: Dectris EIGER2 Si 16M, S/N E-32-0123" in record:
+                return True
+
+        return False
+
+    def _goniometer(self):
+        return self._goniometer_factory.known_axis((-1, 0, 0))
+
+
+if __name__ == "__main__":
+    for arg in sys.argv[1:]:
+        print(FormatCBFMiniEigerChessID7B2.understand(arg))