Show a startup error if virtinst version isn't new enough.

configure.ac

@@ -9,6 +9,10 @@ IT_PROG_INTLTOOL([0.35.0], [no-xml])
 AM_GNU_GETTEXT_VERSION([0.14.1])
 AM_GNU_GETTEXT([external])
 
+# Latest virtinst version required to run
+VIRTINST_VERSION="0.400.3"
+AC_SUBST([VIRTINST_VERSION])
+
 dnl ====================================
 dnl = Begin tests for scrollkeeper
 dnl ====================================

docs/RELEASE-PROCESS.txt

@@ -5,6 +5,7 @@ Preparing the source tree:
 
  1. Sync up latest translations - see po/README.txt
  2. Change release number in configure.ac
+ 3. Update virtinst version requirement in spec and configure.ac
  3. Update NEWS file
  4. Re-generate ChangeLog with 'hg log --style changelog > ChangeLog'
  6. Update virt-manager.spec.in changelog & reset Release to '1'

src/Makefile.am

@@ -48,7 +48,8 @@ EXTRA_DIST = $(bin_SCRIPTS_IN) $(desktop_DATA_IN) $(dbus_DATA_IN) $(python_DATA_
 	  -e "s,::PYLIBDIR::,$(pkgdatadir)," \
 	  -e "s,::GETTEXTDIR::,$(datadir)/locale," \
 	  -e "s,::DATADIR::,$(datadir)," \
-          -e "s,::PYARCHLIBDIR::,$(pkglibdir)," < $< > $@
+	  -e "s,::PYARCHLIBDIR::,$(pkglibdir)," \
+	  -e "s,::VIRTINST_VERSION::,$(VIRTINST_VERSION)," < $< > $@
 
 $(PACKAGE): $(srcdir)/$(PACKAGE).in
 	sed -e "s,::PACKAGE::,$(PACKAGE)," -e "s,::PYTHONDIR::,$(pkgdatadir)," < $< > $@

src/virt-manager.py.in

@@ -39,6 +39,8 @@ appname = "::PACKAGE::"
 appversion = "::VERSION::"
 gettext_app = "virt-manager"
 gettext_dir = "::GETTEXTDIR::"
+virtinst_str = "::VIRTINST_VERSION::"
+virtinst_version = tuple([ int(num) for num in virtinst_str.split('.')])
 
 gconf_dir = "/apps/" + appname
 asset_dir = "::ASSETDIR::"
@@ -289,6 +291,23 @@ def main():
         raise RuntimeError(_("Unable to initialize GTK: %s") % str(e))
     warnings.resetwarnings()
 
+    # Make sure we have a sufficiently new virtinst version, since we are
+    # very closely tied to the lib
+    msg = ("virt-manager requires the python-virtinst library version " +
+            virtinst_str + " or greater. This can be downloaded at:"
+            "\n\nhttp://virt-manager.org/download.html")
+    try:
+        import virtinst
+        ignore = virtinst.__version__
+        ignore = virtinst.__version_info__
+    except Exception, e:
+        raise RuntimeError(str(e) + "\n\n" + msg)
+
+    if virtinst.__version_info__ < virtinst_version:
+        raise RuntimeError("virtinst version %s is too old." %
+                            (virtinst.__version__) +
+                           "\n\n" + msg)
+
     # Add our icon dir to icon theme
     icon_theme = gtk.icon_theme_get_default()
     icon_theme.prepend_search_path(icon_dir)