Add filesystem state metadata baseline

internal/cli/root.go

@@ -28,7 +28,7 @@ Options:
   --config PATH    Load configuration from PATH instead of /usr/local/etc/weatherreporter/config.yml.
   --units VALUE    Override weather API units.
   --tz NAME        Override weather API timezone.
-  --out PATH       Override the generated data package path for generate daily.
+  --out PATH       Write an extra data package copy for generate daily.
 `
 
 type Runner struct {
@@ -210,7 +210,7 @@ func addCommonFlags(fs *flag.FlagSet, opts *commonOptions, includeOutput bool) {
 	fs.StringVar(&opts.Units, "units", "", "weather API units")
 	fs.StringVar(&opts.Timezone, "tz", "", "weather API timezone")
 	if includeOutput {
-		fs.StringVar(&opts.Output, "out", "", "generated data package path")
+		fs.StringVar(&opts.Output, "out", "", "extra data package copy path")
 	}
 }