option [hashtaglist] section. fixes #5

docs/source/configure.rst

@@ -64,7 +64,16 @@ For the [rss] section:
 
 For the [hashtaglist] section:
 
-- several_words_hashtags_list: a path to the file containing hashtags in two or more words. Absolute path is mandatory. By default Feed2toot adds a # before every words of a hashtag.
+- several_words_hashtags_list: a path to the file containing hashtags in two or more words. Absolute path is mandatory. By default Feed2toot adds a # before every words of a hashtag. See documentation below for an example of this file.
+
+Example of the list of hash tags
+================================
+The list of hash tags is a simple text file with one hash tag composed by several words on a single line::
+
+    free software community
+    open-source
+
+Instead of having #free #software #community or #open-source in the resulting toot, you will have #freesoftwarecommunity and #opensource. You only have to identify the hash tags you frequently use in your RSS feeds and put them in this file to have well formatted hash tags in your toots.
 
 List of rss feeds
 =================

feed2toot/confparse.py

@@ -191,12 +191,13 @@ class ConfParse(object):
             if not self.clioptions.hashtaglist:
                 confoption = 'several_words_hashtags_list'
                 if config.has_section(section):
-                    options['hashtaglist'] = config.get(section, confoption)
-                    options['hashtaglist'] = os.path.expanduser(options['hashtaglist'])
-                    if not os.path.exists(options['hashtaglist']) or not os.path.isfile(options['hashtaglist']):
-                        sys.exit('The path to the several_words_hashtags_list parameter is not valid: {hashtaglist}'.format(hashtaglist=options['hashtaglist']))
+                    if config.has_option(section, confoption):
+                        options['hashtaglist'] = config.get(section, confoption)
+                        options['hashtaglist'] = os.path.expanduser(options['hashtaglist'])
+                        if not os.path.exists(options['hashtaglist']) or not os.path.isfile(options['hashtaglist']):
+                            sys.exit('The path to the several_words_hashtags_list parameter is not valid: {hashtaglist}'.format(hashtaglist=options['hashtaglist']))
                 else:
-                    options['hashtaglist'] = False
+                    options['hashtaglist'] = ''
             ###########################
             # 
             # the plugins section

feed2toot/main.py

@@ -75,10 +75,12 @@ class Main(object):
             plugins = conf[4]
             # create link to the persistent list
             cache = FeedCache(options)
-            if options['hashtaglist']:
+            if 'hashtaglist' in options and options['hashtaglist']:
                 severalwordshashtags = codecs.open(options['hashtaglist'],
                                                    encoding='utf-8').readlines()
                 severalwordshashtags = [i.rstrip('\n') for i in severalwordshashtags]
+            else:
+                severalwordshashtags = []
             # reverse feed entries because most recent one should be sent as the last one in Mastodon
             for feed in feeds:
                 # store the patterns by rss