* apt/utils.py:

  - add some misc utils like get_release_filename_for_pkg()

2 files changed, 81 insertions, 0 deletions

diff --git a/apt/utils.py b/apt/utils.py
new file mode 100644
index 00000000..df1d0397
--- /dev/null
+++ b/apt/utils.py
@@ -0,0 +1,76 @@
+# Copyright (C) 2009 Canonical
+#
+# Authors:
+#  Michael Vogt
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License as
+#  published by the Free Software Foundation; either version 2 of the
+#  License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+import apt_pkg
+import os.path
+
+def get_maintenance_end_date(release_date, m_months):
+    """
+    get the (year, month) tuple when the maintenance for the distribution
+    ends. Needs the data of the release and the number of months that
+    its is supported as input
+    """
+    years = m_months / 12
+    months = m_months % 12
+    support_end_year = release_date.year + years + (release_date.month + months)/12
+    support_end_month = (release_date.month + months) % 12
+    return (support_end_year, support_end_month)
+
+def get_release_date_from_release_file(path):
+    """
+    return the release date as time_t for the given release file
+    """
+    if not path or not os.path.exists(path):
+        return None
+    tag = apt_pkg.ParseTagFile(open(path))
+    tag.Step()
+    if not tag.Section.has_key("Date"):
+        return None
+    date = tag.Section["Date"]
+    return apt_pkg.StrToTime(date)
+
+def get_release_filename_for_pkg(cache, pkgname, label, release):
+    " get the release file that provides this pkg "
+    if not cache.has_key(pkgname):
+        return None
+    pkg = cache[pkgname]
+    ver = None
+    # look for the version that comes from the repos with
+    # the given label and origin
+    for aver in pkg._pkg.VersionList:
+        if aver == None or aver.FileList == None:
+            continue
+        for verFile, index in aver.FileList:
+            #print verFile
+            if (verFile.Origin == label and
+                verFile.Label == label and
+                verFile.Archive == release):
+                ver = aver
+    if not ver:
+        return None
+    indexfile = cache._list.FindIndex(ver.FileList[0][0])
+    for metaindex in cache._list.List:
+        for m in metaindex.IndexFiles:
+            if (indexfile and
+                indexfile.Describe == m.Describe and
+                indexfile.IsTrusted):
+                dir = apt_pkg.Config.FindDir("Dir::State::lists")
+                name = apt_pkg.URItoFileName(metaindex.URI)+"dists_%s_Release" % metaindex.Dist
+                return dir+name
+    return None
diff --git a/debian/changelog b/debian/changelog
index bba66321..65ea74b8 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,5 +1,6 @@
 python-apt (0.7.93.1) UNRELEASED; urgency=low
 
+  [ Julian Andres Klode ]
   * Fix reference counting for old progress classes (Closes: #566370).
   * apt/cache.py:
     - Fix Cache.update() to not raise errors on successful updates.
@@ -30,6 +31,10 @@ python-apt (0.7.93.1) UNRELEASED; urgency=low
     - Make python-apt-dev depend on ${misc:Depends} and recommend python-dev.
     - Set Standards-Version to 3.8.4.
 
+  [ Michael Vogt ]
+  * apt/utils.py:
+    - add some misc utils like get_release_filename_for_pkg()
+
  -- Julian Andres Klode <jak@debian.org>  Sat, 23 Jan 2010 15:35:55 +0100
 
 python-apt (0.7.93) unstable; urgency=low