Allow to use list of globs/file paths when using multi-labelled group…

…s in h5ad param

Update related docs

docs/pipelines.rst

@@ -620,7 +620,7 @@ In the generated .config file, make sure the ``file_paths`` parameter is set wit
 
 - The ``suffix`` parameter is used to infer the sample name from the file paths (it is removed from the input file path to derive a sample name).
 
-In case there are multiple .h5ad files that need to be processed with different suffixes, the following strategy should be used to define the h5ad param::
+In case there are multiple .h5ad files that need to be processed with different suffixes, the multi-labelled strategy should be used to define the h5ad param::
 
     [...]
     data {
@@ -637,7 +637,10 @@ In case there are multiple .h5ad files that need to be processed with different
     }
     [...]
 
-Note: ``GROUP1``, ``GROUP2`` are just example names here. They can be replaced by any value as long as they are alphanumeric (underscores are allowed).
+Notes: 
+
+- ``GROUP1``, ``GROUP2`` are just example names here. They can be replaced by any value as long as they are alphanumeric (underscores are allowed).
+- ``file_paths`` and ``suffix`` do allow list of paths/globs in the multi-labelled strategy.
 
 ----
 

src/channels/channels.nf

@@ -87,8 +87,8 @@ workflow getDataChannel {
             def filePaths = null
             def suffix = null
             if(!dataH5ad.containsKey("file_paths") && !dataH5ad.containsKey("suffix")) {
-                filePaths = dataH5ad.collect { k,v -> v["file_paths"] }
-                suffix = dataH5ad.collect { k,v -> v["suffix"] }
+                filePaths = dataH5ad.collect { k,v -> v["file_paths"] }.flatten()
+                suffix = dataH5ad.collect { k,v -> v["suffix"] }.flatten()
             } else {
                 filePaths = dataH5ad.file_paths
                 suffix = dataH5ad.suffix