add lock to combine_daily_reports

Author: eford

examples/combine_daily_reports_v1.0.jl

@@ -50,7 +50,7 @@ if !(args["overwrite"] || !isfile(output_fn) || (filesize(output_fn)==0))
    @error "Can't overwrite " output_filename=output_fn
    exit(1)
 else
-   #touch(output_fn)  # Should we create empty file as a lock?
+   touch(output_fn)  # Should we create empty file as a lock?
 end
 
 @info "# Loading packages"
@@ -62,7 +62,10 @@ files1 = glob([r"\d{2}",args["input_filename"]],args["input_path"])
 files2 = glob([r"\d{2}",r"\d{2}",args["input_filename"]],args["input_path"])
 files3 = glob([r"\d{4}",r"\d{2}",r"\d{2}",args["input_filename"]],args["input_path"])
 files = vcat(files1,files2,files3)
-@assert length(files) >= 1
+if !(length(files) >= 1)
+   @warn "No files found."
+   exit()
+end
 
 if !isnothing(args["exclude_filename"]) && isfile(args["exclude_filename"]) && (filesize(args["exclude_filename"])>0)
    @info "# Reading days to exclude."