Unstage both addition and deletion when unstaging rename

gitfourchette/tasks/indextasks.py

@@ -234,7 +234,12 @@ def flow(self, deltas: list[GitDelta]):
             QApplication.beep()
             raise AbortTask()
 
-        paths = [delta.new.path for delta in deltas]
+        paths = []
+        for delta in deltas:
+            paths.append(delta.new.path)
+            if delta.status == "R":
+                paths.append(delta.old.path)
+
         self.effects |= TaskEffects.Workdir
         # Not using 'restore --staged' because it doesn't work in an empty repo
         yield from self.flowCallGit("reset", "--", *paths)

test/test_filelist.py

@@ -660,3 +660,28 @@ def testFileListNaturalSort(tempDir, mainWindow):
 
     rw = mainWindow.openRepo(wd)
     assert qlvGetRowData(rw.dirtyFiles) == names
+
+
+def testUnstageRenamedFile(tempDir, mainWindow):
+    wd = unpackRepo(tempDir)
+    writeFile(f"{wd}/a.txt", "content")
+
+    with RepoContext(wd) as repo:
+        repo.index.add("a.txt")
+        repo.create_commit_on_head("initial", TEST_SIGNATURE, TEST_SIGNATURE)
+
+        os.rename(f"{wd}/a.txt", f"{wd}/b.txt")
+        repo.index.add_all()
+        repo.index.write()
+
+    rw = mainWindow.openRepo(wd)
+
+    staged = qlvGetRowData(rw.stagedFiles)
+    assert staged == ["b.txt"]
+
+    rw.diffArea.stagedFiles.selectAll()
+    triggerContextMenuAction(rw.diffArea.stagedFiles.viewport(), "unstage")
+
+    status = rw.repo.status()
+    assert status['a.txt'] == FileStatus.WT_DELETED
+    assert status['b.txt'] == FileStatus.WT_NEW