first import

diff --git a/queue_rss.py b/queue_rss.py
new file mode 100755 (executable)
index 0000000..2146e5e
--- /dev/null
+++ b/queue_rss.py
@@ -0,0 +1,180 @@
+#!/usr/bin/python
+# Generate two rss feeds for a directory with .changes file
+
+# License: GPL v2 or later
+# Author: Filippo Giunchedi <filippo@debian.org>
+# Version: 0.4
+
+import os
+import os.path
+import cPickle
+import sys
+import encodings.ascii
+from email.Parser import HeaderParser
+from optparse import OptionParser
+
+import PyRSS2Gen
+
+inrss_filename = "changes_in.rss"
+outrss_filename = "changes_out.rss"
+db_filename = "status.db"
+
+parser = OptionParser()
+parser.set_defaults(queuedir="queue", outdir="out", max_entries="30")
+
+parser.add_option("-q", "--queuedir", dest="queuedir",
+        help="The queue dir (%default)")
+parser.add_option("-o", "--outdir", dest="outdir",
+        help="The output directory (%default)")
+parser.add_option("-m", "--max-entries", dest="max_entries", type="int",
+        help="Max number of entries to keep (%default)")
+
+class Status:
+    def __init__(self):
+        self.feed_in = PyRSS2Gen.RSS2(
+                       title = "Packages entering NEW",
+                       link = "http://ftp-master.debian.org/new.html",
+                       description = "Debian packages entering the NEW queue" )
+
+        self.feed_out = PyRSS2Gen.RSS2(
+                       title = "Packages leaving NEW",
+                       link = "http://ftp-master.debian.org/new.html",
+                       description = "Debian packages leaving the NEW queue" )
+        
+        self.queue = {}
+
+def utf2ascii(src):
+    """ Return an ASCII encoded copy of the input UTF-8 string """
+    try:
+        res = unicode(src, 'utf-8').encode('ascii', 'replace') 
+    except UnicodeDecodeError:
+        res = None
+    return res
+
+def purge_old_items(feed, max):
+    """ Purge RSSItem from feed, no more than max. """
+    if feed.items is None or len(feed.items) == 0:
+        return False
+    
+    # most recent first
+    feed.items.sort(lambda x,y: cmp(y.pubDate, x.pubDate))
+    feed.items = feed.items[:max]
+    return True
+
+def parse_changes(fname):
+    """ Parse a .changes file named fname.
+    
+    Return {fname: parsed} """
+
+    p = HeaderParser()
+
+    try:
+        m = p.parse(open(fname), True)
+    except IOError:
+        sys.stderr.write("Unable to parse %s\n" % fname)
+
+    wanted_fields = set(['Source', 'Version', 'Architecture', 'Distribution',
+                         'Date', 'Maintainer', 'Description', 'Changes'])
+
+    if not set(m.keys()).issuperset(wanted_fields):
+        return None
+
+    return {os.path.basename(fname): m}
+
+def parse_queuedir(dir):
+    """ Parse dir for .changes files.
+    
+    Return a dictionary {filename: parsed_file}"""
+
+    if not os.path.exists(dir):
+        return None
+    
+    res = {}
+    for fname in os.listdir(dir):
+        if not fname.endswith(".changes"):
+            continue
+        
+        parsed = parse_changes(os.path.join(dir, fname))
+        if parsed:
+            res.update(parsed)
+
+    return res
+
+def append_rss_item(status, msg, direction):
+    if direction == "in":
+        feed = status.feed_in
+        title = "%s %s entered NEW" % (msg['Source'], msg['Version'])
+    elif direction == "out":
+        feed = status.feed_out
+        title = "%s %s left NEW" % (msg['Source'], msg['Version'])
+    else:
+        return False
+    
+    description = "<pre>Description: %s\nChanges: %s\n</pre>" % \
+            (utf2ascii(msg['Description']), utf2ascii(msg['Changes']))
+
+    feed.items.append(
+        PyRSS2Gen.RSSItem(
+            title, 
+            pubDate = msg['Date'],
+#            pubDate = now(),
+            description = description,
+            author = utf2ascii(msg['Maintainer']),
+            link = "http://ftp-master.debian.org/new/%s_%s.html" % \
+                    (msg['Source'], msg['Version'])
+        )
+    )
+
+def update_feeds(curqueue, status):
+    # inrss -> append all items in curqueue not in status.queue
+    # outrss -> append all items in status.queue not in curqueue
+    
+    for (name, parsed) in curqueue.items():
+        if not status.queue.has_key(name):
+            # new package
+            append_rss_item(status, parsed, "in")
+
+    for (name, parsed) in status.queue.items():
+        if not curqueue.has_key(name):
+            # removed package
+            append_rss_item(status, parsed, "out")
+
+    
+
+if __name__ == "__main__":
+
+    (settings, args) = parser.parse_args()
+
+    if not os.path.exists(settings.outdir):
+        sys.stderr.write("Outdir '%s' does not exists\n" % settings.outdir)
+        sys.exit(1)
+
+    status_db = os.path.join(settings.outdir, db_filename)
+
+    try:
+        status = cPickle.load(open(status_db))
+    except IOError:
+        status = Status()
+
+    current_queue = parse_queuedir(settings.queuedir)
+    if not current_queue:
+        sys.stderr.write("Unable to scan queuedir '%s'\n" % settings.queuedir)
+        parser.print_help()
+        sys.exit(1)
+
+    update_feeds(current_queue, status)
+
+    purge_old_items(status.feed_in, settings.max_entries) 
+    purge_old_items(status.feed_out, settings.max_entries) 
+
+    feed_in_file = os.path.join(settings.outdir, inrss_filename)
+    feed_out_file = os.path.join(settings.outdir, outrss_filename)
+
+    status.feed_in.write_xml(file(feed_in_file, "w+"), "utf-8")
+    status.feed_out.write_xml(file(feed_out_file, "w+"), "utf-8")
+
+    status.queue = current_queue 
+
+    cPickle.dump(status, open(status_db, "w+"))
+
+# vim:et:ts=4