euscan: Adding support for disabling handlers

Signed-off-by: volpino <fox91@anche.no>

TODO

@@ -9,7 +9,6 @@ euscan
 - Check other distros (youri, distrowatch, distromatch, whoas; Equivalent-Packages)
 - Steal ideas from other tools (uscan, portscout)
 - Steal data from other tools (dehs)
-- Add a way to enable/disable handlers (--no-handler-kde --no-handler-sourceforge)
 
 ### Command line interface
 

bin/euscan

@@ -133,6 +133,9 @@ def print_usage(_error=None, help=None):
             "                       - use mirror:// URIs", file=out)
         print(yellow("     --ebuild-uri") +
             "                   - use ebuild variables in URIs", file=out)
+        print(yellow("     --no-handlers") +
+            "                  - exclude handlers (comma-separated list)",
+            file=out)
         print(file=out)
 
     if _error in ('packages',) or help:
@@ -194,6 +197,8 @@ def parse_args():
                 CONFIG['ignore-pre-release-if-stable'] = True
             elif o in ("--ebuild-uri"):
                 CONFIG['ebuild-uri'] = True
+            elif o in ("--no-handlers"):
+                CONFIG['handlers-exclude'] = a.split(",")
             else:
                 return_code = False
 
@@ -205,7 +210,7 @@ def parse_args():
     getopt_options['long']['global'] = [
         "help", "version", "nocolor", "quiet", "verbose", "oneshot",
         "brute-force=", "format=", "progress", "mirror", "ignore-pre-release",
-        "ignore-pre-release-if-stable", "ebuild-uri"
+        "ignore-pre-release-if-stable", "ebuild-uri", "no-handlers="
     ]
 
     short_opts = getopt_options['short']['global']

pym/euscan/__init__.py

@@ -7,6 +7,7 @@ __version__ = "git"
 
 import ConfigParser
 import os
+from ast import literal_eval
 
 
 CONFIG = {
@@ -29,6 +30,7 @@ CONFIG = {
     'ignore-pre-release': False,
     'ignore-pre-release-if-stable': False,
     'ebuild-uri': False,
+    'handlers-exclude': [],
 }
 
 config = ConfigParser.ConfigParser()
@@ -36,7 +38,7 @@ config.read(['/etc/euscan.conf', os.path.expanduser('~/.euscan.conf')])
 if config.has_section("euscan"):
     for key, value in config.items("euscan"):
         if key in CONFIG:
-            CONFIG[key] = value
+            CONFIG[key] = literal_eval(value)
 
 BLACKLIST_VERSIONS = [
     # Compatibility package for running binaries linked against a

pym/euscan/handlers/__init__.py

@@ -37,7 +37,8 @@ def find_best_handler(kind, pkg, *args):
     Find the best handler for the given package
     """
     for handler in handlers[kind]:
-        if handler.can_handle(pkg, *args):
+        if (handler.HANDLER_NAME not in CONFIG["handlers-exclude"] and
+            handler.can_handle(pkg, *args)):
             return handler
     return None
 
@@ -149,8 +150,11 @@ def scan_url(pkg, urls, options, on_progress=None):
 
             try:
                 url_handler = find_best_handler('url', pkg, url)
+                if url_handler:
                     for o in options:
                         versions += url_handler.scan_url(pkg, url, o)
+                else:
+                    output.eerror("Can't find a suitable handler!")
             except Exception as e:
                 output.ewarn(
                     "Handler failed: [%s] %s" %