GUI: Re-work local backend plumbing

A single command line is not expressive enough for at least two cases:
process_hkl, which needs to be run two extra times to generate the splits,
and ambigator, which needs to have its input streams concatenated first.

This also splits out the routine for creating the working folder and
writing the notes file.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gui_merge.h b/src/gui_merge.h
index 978a3dcd..46d6dcaf 100644
--- a/src/gui_merge.h
+++ b/src/gui_merge.h
@@ -40,4 +40,10 @@ extern char **merging_command_line(const char *n_thread_str,
                                    struct gui_indexing_result *input,
                                    struct merging_params *params);
 
+extern int write_merge_script(const char *filename,
+                              struct gui_indexing_result *input,
+                              const char *n_thread_str,
+                              struct merging_params *params,
+                              const char *out_hkl);
+
 #endif