auto-clean newlines and spaces in repo/archive descriptions

This gives us flexibility in how the blocks of text can be formatted in
config.py, but also provides a more useful format for displaying since the
client can decide where to wrap the text.

fdroidserver/common.py

@@ -62,11 +62,12 @@ def get_default_config():
         'repo_url': "https://MyFirstFDroidRepo.org/fdroid/repo",
         'repo_name': "My First FDroid Repo Demo",
         'repo_icon': "fdroid-icon.png",
-        'repo_description': (
-            "This is a repository of apps to be used with FDroid. Applications in this "
-            + "repository are either official binaries built by the original application "
-            + "developers, or are binaries built from source by the admin of f-droid.org "
-            + "using the tools on https://gitlab.com/u/fdroid."),
+        'repo_description': '''
+            This is a repository of apps to be used with FDroid. Applications in this
+            repository are either official binaries built by the original application
+            developers, or are binaries built from source by the admin of f-droid.org
+            using the tools on https://gitlab.com/u/fdroid.
+            ''',
         'archive_older': 0,
     }
 
@@ -163,6 +164,10 @@ def read_config(opts, config_file='config.py'):
         if k in config:
             write_password_file(k)
 
+    for k in ["repo_description", "archive_description"]:
+        if k in config:
+            config[k] = clean_description(config[k])
+
     # since this is used with rsync, where trailing slashes have meaning,
     # ensure there is always a trailing slash
     if 'serverwebroot' in config:
@@ -290,6 +295,19 @@ def has_extension(filename, extension):
 apk_regex = None
 
 
+def clean_description(description):
+    'Remove unneeded newlines and spaces from a block of description text'
+    returnstring = ''
+    # this is split up by paragraph to make removing the newlines easier
+    for paragraph in re.split(r'\n\n', description):
+        paragraph = re.sub('\r', '', paragraph)
+        paragraph = re.sub('\n', ' ', paragraph)
+        paragraph = re.sub(' {2,}', ' ', paragraph)
+        paragraph = re.sub('^\s*(\w)', r'\1', paragraph)
+        returnstring += paragraph + '\n\n'
+    return returnstring.rstrip('\n')
+
+
 def apknameinfo(filename):
     global apk_regex
     filename = os.path.basename(filename)