Add type of change to files_dict of a commit

This allows to not only get the total, inserted or deleted number of
lines being changed but also the type of change like
Added (A), Copied (C), Deleted (D), Modified (M), Renamed (R),
type changed (T), Unmerged (U), Unknown (X), or pairing Broken (B)

Author: JonasScharpf

Diff for: AUTHORS

@@ -54,5 +54,6 @@ Contributors are:
 -Wenhan Zhu <wzhu.cosmos _at_ gmail.com>
 -Eliah Kagan <eliah.kagan _at_ gmail.com>
 -Ethan Lin <et.repositories _at_ gmail.com>
+-Jonas Scharpf <jonas.scharpf _at_ checkmk.com>
 
 Portions derived from other open source works and are clearly marked.

Diff for: git/objects/commit.py

@@ -377,15 +377,25 @@ def stats(self) -> Stats:
         :return:
             :class:`Stats`
         """
-        if not self.parents:
-            text = self.repo.git.diff_tree(self.hexsha, "--", numstat=True, no_renames=True, root=True)
-            text2 = ""
-            for line in text.splitlines()[1:]:
+
+        def process_lines(lines: List[str]) -> str:
+            text = ""
+            for file_info, line in zip(lines, lines[len(lines) // 2 :]):
+                change_type = file_info.split("\t")[0][-1]
                 (insertions, deletions, filename) = line.split("\t")
-                text2 += "%s\t%s\t%s\n" % (insertions, deletions, filename)
-            text = text2
+                text += "%s\t%s\t%s\t%s\n" % (change_type, insertions, deletions, filename)
+            return text
+
+        if not self.parents:
+            lines = self.repo.git.diff_tree(
+                self.hexsha, "--", numstat=True, no_renames=True, root=True, raw=True
+            ).splitlines()[1:]
+            text = process_lines(lines)
         else:
-            text = self.repo.git.diff(self.parents[0].hexsha, self.hexsha, "--", numstat=True, no_renames=True)
+            lines = self.repo.git.diff(
+                self.parents[0].hexsha, self.hexsha, "--", numstat=True, no_renames=True, raw=True
+            ).splitlines()
+            text = process_lines(lines)
         return Stats._list_from_string(self.repo, text)
 
     @property

Diff for: git/types.py

@@ -248,6 +248,7 @@ class Files_TD(TypedDict):
     insertions: int
     deletions: int
     lines: int
+    change_type: str
 
 
 class Total_TD(TypedDict):

Diff for: git/util.py

@@ -910,6 +910,7 @@ class Stats:
       deletions = number of deleted lines as int
       insertions = number of inserted lines as int
       lines = total number of lines changed as int, or deletions + insertions
+      change_type = type of change as str, A|C|D|M|R|T|U|X|B
 
     ``full-stat-dict``
 
@@ -938,7 +939,7 @@ def _list_from_string(cls, repo: "Repo", text: str) -> "Stats":
             "files": {},
         }
         for line in text.splitlines():
-            (raw_insertions, raw_deletions, filename) = line.split("\t")
+            (change_type, raw_insertions, raw_deletions, filename) = line.split("\t")
             insertions = raw_insertions != "-" and int(raw_insertions) or 0
             deletions = raw_deletions != "-" and int(raw_deletions) or 0
             hsh["total"]["insertions"] += insertions
@@ -949,6 +950,7 @@ def _list_from_string(cls, repo: "Repo", text: str) -> "Stats":
                 "insertions": insertions,
                 "deletions": deletions,
                 "lines": insertions + deletions,
+                "change_type": change_type,
             }
             hsh["files"][filename.strip()] = files_dict
         return Stats(hsh["total"], hsh["files"])

Diff for: test/fixtures/diff_numstat

@@ -1,2 +1,3 @@
-29	18	a.txt
-0	5	b.txt
+M	29	18	a.txt
+M	0	5	b.txt
+A	7	0	c.txt

Diff for: test/test_commit.py

@@ -135,9 +135,12 @@ def test_stats(self):
         commit = self.rorepo.commit("33ebe7acec14b25c5f84f35a664803fcab2f7781")
         stats = commit.stats
 
-        def check_entries(d):
+        def check_entries(d, has_change_type=False):
             assert isinstance(d, dict)
-            for key in ("insertions", "deletions", "lines"):
+            keys = ("insertions", "deletions", "lines")
+            if has_change_type:
+                keys += ("change_type",)
+            for key in keys:
                 assert key in d
 
         # END assertion helper
@@ -148,7 +151,7 @@ def check_entries(d):
         assert "files" in stats.total
 
         for _filepath, d in stats.files.items():
-            check_entries(d)
+            check_entries(d, True)
         # END for each stated file
 
         # Check that data is parsed properly.

Diff for: test/test_stats.py

@@ -14,13 +14,19 @@ def test_list_from_string(self):
         output = fixture("diff_numstat").decode(defenc)
         stats = Stats._list_from_string(self.rorepo, output)
 
-        self.assertEqual(2, stats.total["files"])
-        self.assertEqual(52, stats.total["lines"])
-        self.assertEqual(29, stats.total["insertions"])
+        self.assertEqual(3, stats.total["files"])
+        self.assertEqual(59, stats.total["lines"])
+        self.assertEqual(36, stats.total["insertions"])
         self.assertEqual(23, stats.total["deletions"])
 
         self.assertEqual(29, stats.files["a.txt"]["insertions"])
         self.assertEqual(18, stats.files["a.txt"]["deletions"])
+        self.assertEqual("M", stats.files["a.txt"]["change_type"])
 
         self.assertEqual(0, stats.files["b.txt"]["insertions"])
         self.assertEqual(5, stats.files["b.txt"]["deletions"])
+        self.assertEqual("M", stats.files["b.txt"]["change_type"])
+
+        self.assertEqual(7, stats.files["c.txt"]["insertions"])
+        self.assertEqual(0, stats.files["c.txt"]["deletions"])
+        self.assertEqual("A", stats.files["c.txt"]["change_type"])