Add svn blame support

Add new command and add test_blame test case.

svn/common.py

@@ -285,6 +285,43 @@ def export(self, to_path, revision=None, force=False):
 
         self.run_command('export', cmd)
 
+    def blame(self, rel_filepath, 
+            revision_from=None, revision_to=None):
+        """
+        svn usage: blame [-r M:N] TARGET[@REV]
+        """
+
+        full_url_or_path = self.__url_or_path + "/" + rel_filepath
+
+        args = []
+        if revision_from or revision_to:
+            if not revision_from:
+                revision_from = '1'
+
+            if not revision_to:
+                revision_to = 'HEAD'
+
+            args += ['-r', str(revision_from) + ':' + str(revision_to)]
+
+        result = self.run_command(
+            "blame", args + ["--xml", full_url_or_path], do_combine=True)
+
+        root = xml.etree.ElementTree.fromstring(result)
+
+        for entry in root.findall("target/entry"):
+            commit = entry.find("commit")
+            author = entry.find("commit/author")
+            date_ = entry.find("commit/date")
+            if author is None or date_ is None:
+                continue
+            info = {
+                'line_number': int(entry.attrib['line-number']),
+                "commit_author": self.__element_text(author),
+                "commit_date": dateutil.parser.parse(date_.text),
+                "commit_revision": int(commit.attrib["revision"]),
+            }
+            yield info
+
     def list(self, extended=False, rel_path=None):
         full_url_or_path = self.__url_or_path
         if rel_path is not None:

svn/resources/README.md

@@ -25,6 +25,7 @@ Functions currently implemented:
 - update
 - cleanup
 - remove (i.e. rm, del, delete)
+- blame
 
 In addition, there is also an "admin" class (`svn.admin.Admin`) that provides a
 `create` method with which to create repositories.
@@ -268,6 +269,26 @@ for rel_path, e in l.list_recursive():
 # 'timestamp': datetime.datetime(2015, 4, 24, 3, 25, 13, 479212, tzinfo=tzutc())}
 ```
 
+### blame(rel_filepath, revision=None)
+
+Blame specified file.
+
+```
+import pprint
+import svn.local
+
+lc = svn.local.LocalClient('/tmp/test_repo.co')
+
+for line_info in lc.blame("version.py"):
+    pprint.pprint(line_info)
+
+# {
+#    'line_number': 1,
+#    'commit_revision': 1222,
+#    'commit_author': 'codeskyblue',
+#    'commit_date': datetime.datetime(2018, 12, 20, 3, 25, 13, 479212, tzinfo=tzutc())}
+```
+
 
 ### diff_summary(start_revision,  end_revision)
 

tests/test_common.py

@@ -208,6 +208,22 @@ def test_export(self):
                 except:
                     pass
 
+    def test_blame(self):
+        with svn.test_support.temp_common() as (_, _, cc):
+            f = svn.test_support.populate_bigger_file_change1()
+            actual_answer = cc.blame(f, revision_to=2)
+            line1 = next(actual_answer)
+            for i in range(5):
+                # find the modified line
+                line6 = next(actual_answer)
+            line7 = next(actual_answer)
+            self.assertEqual(line1['line_number'], 1)
+            self.assertEqual(line1['commit_revision'], 1)
+            self.assertEqual(line1['commit_author'], line7['commit_author'])
+
+            self.assertEqual(line6['line_number'], 6)
+            self.assertEqual(line6['commit_revision'], 2)
+
     def test_force__export(self):
         with svn.test_support.temp_common() as (_, _, cc):
             svn.test_support.populate_bigger_file_changes1()