feat: 'prices' option in spansh and eddblink

spansh and eddblink plugins no longer regenerate the
`TradeDangerous.prices` cache file by default

The cache file is used to rebuild the database in the event it is lost,
corrupted or otherwise damaged.

Users can manually perform a backup by running eddblink with the
'prices' option. If not other options are specified, eddblink will only
perform the backup

If any other options are specified, eg. `-O listings,prices`, eddblink
will perform the backup after the import process has completed.

tradedangerous/plugins/eddblink_plug.py

@@ -89,7 +89,8 @@ class ImportPlugin(plugins.ImportPluginBase):
         'force':        "Force regeneration of selected items even if source file not updated since previous run. "
                         "(Useful for updating Vendor tables if they were skipped during a '-O clean' run.)",
         'purge':        "Remove any empty systems that previously had fleet carriers.",
-        'solo':         "Don't download crowd-sourced market data. (Implies '-O skipvend', supercedes '-O all', '-O clean', '-O listings'.)"
+        'solo':         "Don't download crowd-sourced market data. (Implies '-O skipvend', supercedes '-O all', '-O clean', '-O listings'.)",
+        "prices":       "Backup listings to the TradeDangerous.prices cache file",
     }
 
     def __init__(self, tdb, tdenv):
@@ -351,7 +352,7 @@ def run(self):
         default = True
         for option in self.options:
             # if not option in ('force', 'fallback', 'skipvend', 'progbar'):
-            if not option in ('force', 'skipvend'):
+            if not option in ('force', 'skipvend', 'prices'):
                 default = False
         if default:
             self.options["listings"] = True
@@ -508,7 +509,7 @@ def run(self):
             if self.downloadFile(self.liveListingsPath) or self.getOption("force"):
                 self.importListings(self.liveListingsPath)
 
-        if self.getOption("listings"):
+        if self.getOption("prices"):
             self.tdenv.NOTE("Regenerating .prices file.")
             cache.regeneratePricesFile(self.tdb, self.tdenv)
 

tradedangerous/plugins/spansh_plug.py

@@ -65,15 +65,13 @@ class ImportPlugin(plugins.ImportPluginBase):
         'url':  f'URL to download galaxy data from (defaults to {SOURCE_URL})',
         'file': 'Local filename to import galaxy data from; use "-" to load from stdin',
         'maxage': 'Skip all entries older than specified age in days, ex.: maxage=1.5',
-        'listener': 'For use by TD-listener, prevents updating cache from generated prices file',
     }
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.url = self.getOption('url')
         self.file = self.getOption('file')
         self.maxage = float(self.getOption('maxage')) if self.getOption('maxage') else None
-        self.listener = self.getOption('listener')
         assert not (self.url and self.file), 'Provide either url or file, not both'
         if self.file and (self.file != '-'):
             self.file = (Path(self.tdenv.cwDir) / self.file).resolve()
@@ -170,11 +168,6 @@ def run(self):
                 f'{total_station_count} st  {total_commodity_count} co'
             )
 
-        with Timing() as timing:
-            self.print('Exporting to cache...')
-            cache.regeneratePricesFile(self.tdb, self.tdenv)
-            self.print(f'Cache export completed in {timedelta(seconds=int(timing.elapsed))!s}')
-
         return False
 
     def data_stream(self):