delta: Add an option to specify the format of delta package

pisi/cli/delta.py

@@ -16,6 +16,7 @@ import gettext
 __trans = gettext.translation('pisi', fallback=True)
 _ = __trans.ugettext
 
+import pisi
 import pisi.cli.command as command
 import pisi.context as ctx
 
@@ -52,11 +53,26 @@ class Delta(command.Command):
                          default=None,
                          help=_("Output directory for produced packages"))
 
+        group.add_option("-F", "--package-format",
+                         action="store",
+                         help=_("Create the binary package using the given "
+                                "format. Use '-F help' to see a list of "
+                                "supported formats."))
+
     def run(self):
         from pisi.operations.delta import create_delta_package
 
         self.init(database=False, write=False)
 
+        if self.options.package_format == "help":
+            ctx.ui.info(_("Supported package formats:"))
+            for format in pisi.package.Package.formats:
+                if format == pisi.package.Package.default_format:
+                    ctx.ui.info(_("  %s (default)") % format)
+                else:
+                    ctx.ui.info("  %s" % format)
+            return
+
         if len(self.args) != 2:
             self.help()
             return

pisi/operations/delta.py

@@ -62,7 +62,8 @@ def create_delta_package(old_package, new_package):
     if outdir:
         deltaname = util.join_path(outdir, deltaname)
 
-    deltapkg = pisi.package.Package(deltaname, "w")
+    deltapkg = pisi.package.Package(deltaname, "w",
+                                    format=ctx.get_option("package_format"))
 
     c = os.getcwd()
     os.chdir(newpkg_path)