Is it possible to have a Importer or Export set a parameter and then pass through to a different Importer/Export plug-in? It seems like it would be relatively straightforward to temporarily change a preference/config and pass through the file information to the other plug-in.
The 2 most common delimiters for data files in text format are : Comma (.csv file extension) and Tab (.tsv or .tab). Serge @SNoiraud created a global delimiter override feature (interfaced via View → Config… for list views) that affects CSV import/export features.
If the filetype-autodetected a .tsv or .tab (or that override is selected), then would be reasonable to use the Tab delimiter regardless of which delimiter option was user-selected.
(There appears to be a current bug where Automatically detected overrides manual choices in “Select file type” if there is some filetype ambiguity. Such as a ‘.csv’ that is also a supported filetype for a Tab Separated Values importer.)
