setup: Remove dep on importing virtinst

Import BuildConfig directly from the source file using import hackery.
buildconfig.py is independent of virtinst code so it already does
the right thing. Add some checking to make sure this doesn't regress
in the future.

Drop the now unneeded RPM deps.

setup.py

@@ -12,7 +12,6 @@ if sys.version_info.major < 3:
 import glob
 import fnmatch
 import os
-import re
 import unittest
 
 import distutils
@@ -29,22 +28,25 @@ import distutils.sysconfig
 sysprefix = distutils.sysconfig.get_config_var("prefix")
 
 
-def _parse_version():
-    # We do these tricks to not mess up code coverage testing. Switching
-    # to pytest will let use drop these
-    path = os.path.join(os.path.dirname(__file__),
-            "virtinst", "buildconfig.py")
-    content = open(path).read()
-    match = re.search(r"^__version__ = \".*\"$", content, re.MULTILINE)
-    return str(match.group(0)).split()[-1].strip("\"")
+def _import_buildconfig():
+    # A bit of crazyness to import the buildconfig file without importing
+    # the rest of virtinst, so the build process doesn't require all the
+    # runtime deps to be installed
+    import warnings
+
+    # 'imp' is deprecated. We use it elsewhere though too. Deal with using
+    # the modern replacement when we replace all usage
+    with warnings.catch_warnings():
+        warnings.filterwarnings("ignore", category=DeprecationWarning)
+        import imp
+        buildconfig = imp.load_source('buildconfig', 'virtinst/buildconfig.py')
+        if "libvirt" in sys.modules:
+            raise RuntimeError("Found libvirt in sys.modules. setup.py should "
+                    "not import virtinst.")
+        return buildconfig.BuildConfig
 
 
-def _get_buildconfig():
-    from virtinst import BuildConfig
-    return BuildConfig
-
-
-VERSION = _parse_version()
+BuildConfig = _import_buildconfig()
 
 
 # pylint: disable=attribute-defined-outside-init
@@ -180,8 +182,6 @@ class my_build(distutils.command.build.build):
     def _make_bin_wrappers(self):
         cmds = ["virt-manager", "virt-install", "virt-clone",
                 "virt-convert", "virt-xml"]
-        BuildConfig = _get_buildconfig()
-
         if not os.path.exists("build"):
             os.mkdir("build")
 
@@ -198,7 +198,6 @@ class my_build(distutils.command.build.build):
 
 
     def _make_man_pages(self):
-        BuildConfig = _get_buildconfig()
         for path in glob.glob("man/*.pod"):
             base = os.path.basename(path)
             appname = os.path.splitext(base)[0]
@@ -281,7 +280,6 @@ class my_install(distutils.command.install.install):
     Error if we weren't 'configure'd with the correct install prefix
     """
     def finalize_options(self):
-        BuildConfig = _get_buildconfig()
         if self.prefix is None:
             if BuildConfig.prefix != sysprefix:
                 print("Using configured prefix=%s instead of sysprefix=%s" % (
@@ -320,7 +318,6 @@ class my_sdist(distutils.command.sdist.sdist):
     description = "Update virt-manager.spec; build sdist-tarball."
 
     def run(self):
-        BuildConfig = _get_buildconfig()
         f1 = open('virt-manager.spec.in', 'r')
         f2 = open('virt-manager.spec', 'w')
         for line in f1:
@@ -348,7 +345,6 @@ class my_rpm(distutils.core.Command):
         """
         Run sdist, then 'rpmbuild' the tar.gz
         """
-        BuildConfig = _get_buildconfig()
         self.run_command('sdist')
         os.system('rpmbuild -ta --clean dist/virt-manager-%s.tar.gz' %
                   BuildConfig.version)
@@ -376,7 +372,6 @@ class configure(distutils.core.Command):
 
 
     def run(self):
-        BuildConfig = _get_buildconfig()
         template = ""
         template += "[config]\n"
         template += "prefix = %s\n" % self.prefix
@@ -665,7 +660,7 @@ class VMMDistribution(distutils.dist.Distribution):
 
 distutils.core.setup(
     name="virt-manager",
-    version=VERSION,
+    version=BuildConfig.version,
     author="Cole Robinson",
     author_email="virt-tools-list@redhat.com",
     url="http://virt-manager.org",

virt-manager.spec.in

@@ -59,11 +59,6 @@ Suggests: python3-libguestfs
 BuildRequires: intltool
 BuildRequires: /usr/bin/pod2man
 BuildRequires: python3-devel
-BuildRequires: python3-gobject-base
-BuildRequires: python3-libvirt
-BuildRequires: python3-libxml2
-BuildRequires: python3-requests
-BuildRequires: libosinfo >= 0.2.10
 
 
 %description