--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mira.py	Mon Jun 03 13:27:27 2019 -0400
@@ -0,0 +1,55 @@
+"""MiraAssemblyFormat class for the 'mira' format within Galaxy."""
+
+from galaxy.datatypes.data import Text
+
+
+class MiraAssemblyFormat(Text):
+    """MIRA Assembly Format  data."""
+
+    file_ext = "mira"
+
+    def sniff(self, filename):
+        """Determine if the file is a MIRA Assembly Format file.
+
+        Note currently this only detects MIRA Assembly Format v2.0,
+        as used in MIRA v3.9 and v4.0.
+
+        It does not detect MIRA Assembly Format v1 as used in both
+        MIRA v3.2 and v3.4.
+        """
+        h = open(filename)
+        line = h.readline()
+        if line.rstrip() != "@Version\t2\t0":
+            h.close()
+            return False
+        line = h.readline()
+        if line.rstrip() != "@Program\tMIRALIB":
+            h.close()
+            return False
+        return True
+
+    def merge(split_files, output_file):
+        """Merge MIRA assembly files (not implemented).
+
+        Merging multiple MIRA files is non-trivial and may not be possible...
+        """
+        if len(split_files) == 1:
+            # For one file only, use base class method (move/copy)
+            return Text.merge(split_files, output_file)
+        if not split_files:
+            raise ValueError(
+                "No MIRA files to merge, %r, into %r" % (split_files, output_file)
+            )
+        raise NotImplementedError(
+            "Merging MIRA Assembly Files has not been implemented"
+        )
+
+    merge = staticmethod(merge)
+
+    def split(cls, input_datasets, subdir_generator_function, split_params):
+        """Split a MIRA Assembly File (not implemented for now)."""
+        if split_params is None:
+            return None
+        raise NotImplementedError("Can't yet split a MIRA Assembly Format file")
+
+    merge = staticmethod(merge)