tree-wide: Make some error messages translatable

pisi/file.py

@@ -32,13 +32,14 @@ import pisi.context as ctx
 
 class AlreadyHaveException(pisi.Exception):
     def __init__(self, url, localfile):
-        pisi.Exception.__init__(self, "URL %s already downloaded as %s" % (url, localfile))
+        pisi.Exception.__init__(self, _("URL %s already downloaded as %s")
+                                      % (url, localfile))
         self.url = url
         self.localfile = localfile
 
 class NoSignatureFound(pisi.Exception):
     def __init__(self, url):
-        pisi.Exception.__init__(self, "No signature found for %s" % url)
+        pisi.Exception.__init__(self, _("No signature found for %s") % url)
         self.url = url
 
 class Error(pisi.Error):
@@ -46,7 +47,7 @@ class Error(pisi.Error):
 
 class InvalidSignature(pisi.Error):
     def __init__(self, url):
-        pisi.Exception.__init__(self, " invalid for %s" % url)
+        pisi.Exception.__init__(self, _(" invalid for %s") % url)
         self.url = url
 
 class File:

pisi/history.py

@@ -97,7 +97,7 @@ class History(xmlfile.XmlFile):
     def create(self, operation):
 
         if operation not in ["upgrade", "remove", "emerge", "install", "snapshot", "takeback", "repoupdate"]:
-            raise Exception("Unknown package operation")
+            raise Exception(_("Unknown package operation"))
 
         opno = self._get_latest()
         self.histfile = "%s_%s.xml" % (opno, operation)
@@ -119,7 +119,7 @@ class History(xmlfile.XmlFile):
     def add(self, pkgBefore=None, pkgAfter=None, operation=None, otype=None):
 
         if operation not in ["upgrade", "remove", "install", "reinstall", "downgrade", "snapshot"]:
-            raise Exception("Unknown package operation")
+            raise Exception(_("Unknown package operation"))
 
         package = Package()
         package.operation = operation