Fix exit code on errors.

dosage

@@ -127,8 +127,12 @@ def saveComicStrip(strip, basepath):
 
 def displayHelp(comics):
     """Print help for comic strips."""
+    try:
         for scraperobj in getScrapers(comics):
             displayComicHelp(scraperobj)
+    except ValueError as msg:
+        out.error(msg)
+        return 1
     return 0
 
 
@@ -157,6 +161,9 @@ def getComics(options):
     try:
         for scraperobj in getScrapers(options.comic, options.basepath, options.adult, options.multimatch):
             errors += getStrips(scraperobj, options)
+    except ValueError as msg:
+        out.error(msg)
+        errors += 1
     finally:
         events.getHandler().end()
     return errors
@@ -293,11 +300,7 @@ def getScrapers(comics, basepath=None, adult=True, multiple_allowed=False):
             else:
                 name = comic
                 indexes = None
-            try:
             scraperclasses = scraper.find_scraperclasses(name, multiple_allowed=multiple_allowed)
-            except ValueError as msg:
-                out.error(msg)
-                continue
             for scraperclass in scraperclasses:
                 if not adult and scraperclass.adult:
                     warn_adult(scraperclass)

tests/test_dosage.py

@@ -51,6 +51,7 @@ class TestDosage (unittest.TestCase):
     def test_error(self):
         self.assertRaises(OSError, run_with_options, [])
         self.assertRaises(OSError, run_with_options, ['--imadoofus'])
+        self.assertRaises(OSError, run_with_options, ['Garfield'])
 
     def test_fetch_html(self):
         run_with_options(["-n", "2", "-b", self.tmpdir, "-o", "html", "-o", "rss", "calvinandhobbes"])