From 628e0dac5580476da4f8393cae383f4787da0a23 Mon Sep 17 00:00:00 2001
From: Guido Günther <agx@sigxcpu.org>
Date: Thu, 23 Nov 2017 13:06:03 +0100
Subject: uscan: disentangle logic a bit

---
 gbp/deb/uscan.py           | 24 +++++++++++++++++-------
 gbp/scripts/import_orig.py | 16 +++++++---------
 tests/31_test_uscan.py     |  2 +-
 3 files changed, 25 insertions(+), 17 deletions(-)

diff --git a/gbp/deb/uscan.py b/gbp/deb/uscan.py
index 4e070933..0416587a 100644
--- a/gbp/deb/uscan.py
+++ b/gbp/deb/uscan.py
@@ -113,13 +113,16 @@ class Uscan(object):
 
         @param out: uscan output
         @type out: string
+        @returns: C{True} if package is uptodate
 
         >>> u = Uscan('http://example.com/')
         >>> u._parse_uptodate('<status>up to date</status>')
+        True
         >>> u.tarball
         >>> u.uptodate
         True
         >>> u._parse_uptodate('')
+        False
         >>> u.tarball
         >>> u.uptodate
         False
@@ -128,6 +131,7 @@ class Uscan(object):
             self._uptodate = True
         else:
             self._uptodate = False
+        return self._uptodate
 
     def _raise_error(self, out):
         r"""
@@ -171,7 +175,11 @@ class Uscan(object):
         raise UscanError(msg)
 
     def scan(self, destdir='..'):
-        """Invoke uscan to fetch a new upstream version"""
+        """
+        Invoke uscan to fetch a new upstream version
+
+        @returns: C{True} if a new version was downloaded
+        """
         p = subprocess.Popen(['uscan', '--symlink', '--destdir=%s' % destdir,
                               '--dehs'],
                              cwd=self._dir,
@@ -179,11 +187,13 @@ class Uscan(object):
         out = p.communicate()[0].decode()
         # uscan exits with 1 in case of uptodate and when an error occurred.
         # Don't fail in the uptodate case:
-        self._parse_uptodate(out)
-        if not self.uptodate:
-            if p.returncode:
-                self._raise_error(out)
-            else:
-                self._parse(out)
+        if self._parse_uptodate(out):
+            return False
+
+        if p.returncode:
+            self._raise_error(out)
+
+        self._parse(out)
+        return True
 
 # vim:et:ts=4:sw=4:et:sts=4:ai:set list listchars=tab\:»·,trail\:·:
diff --git a/gbp/scripts/import_orig.py b/gbp/scripts/import_orig.py
index 1a690f85..97b6d54b 100644
--- a/gbp/scripts/import_orig.py
+++ b/gbp/scripts/import_orig.py
@@ -292,19 +292,17 @@ def find_upstream(use_uscan, args):
         uscan = Uscan()
         gbp.log.info("Launching uscan...")
         try:
-            uscan.scan()
+            if not uscan.scan():
+                gbp.log.info("package is up to date, nothing to do.")
+                return None
         except UscanError as e:
             raise GbpError("%s" % e)
 
-        if uscan.uptodate:
-            gbp.log.info("package is up to date, nothing to do.")
-            return None
+        if uscan.tarball:
+            gbp.log.info("Using uscan downloaded tarball %s" % uscan.tarball)
+            args.append(uscan.tarball)
         else:
-            if uscan.tarball:
-                gbp.log.info("Using uscan downloaded tarball %s" % uscan.tarball)
-                args.append(uscan.tarball)
-            else:
-                raise GbpError("uscan didn't download anything, and no source was found in ../")
+            raise GbpError("uscan didn't download anything, and no source was found in ../")
     if len(args) > 1:  # source specified
         raise GbpError("More than one archive specified. Try --help.")
     elif len(args) == 0:
diff --git a/tests/31_test_uscan.py b/tests/31_test_uscan.py
index 055f2647..5bd0e5e7 100644
--- a/tests/31_test_uscan.py
+++ b/tests/31_test_uscan.py
@@ -39,6 +39,6 @@ gpgv:                 aka "Richard W.M. Jones <rich@annexia.org>"
     def test_uscan(self, uscan_mock):
         """Test parsing a valid uscan file"""
         uscan = Uscan()
-        self.assertIsNone(uscan.scan())
+        self.assertTrue(uscan.scan())
         self.assertFalse(uscan.uptodate)
         self.assertEquals(uscan.tarball, '../virt-what_1.18.orig.tar.gz')
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