From ad270da5941bddb2a71580f4d90ff40d0b7af956 Mon Sep 17 00:00:00 2001
From: Aravinth BALAKRISHNAN <aravinthbalakrishnan@gmail.com>
Date: Wed, 17 Dec 2025 21:05:23 +0100
Subject: [PATCH 1/2] Add reversed option when listing history of revisions

---
 alembic/command.py         | 3 ++-
 alembic/config.py          | 8 ++++++++
 alembic/script/base.py     | 8 ++++++--
 alembic/script/revision.py | 8 +++++++-
 4 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/alembic/command.py b/alembic/command.py
index 4897c0d9..39f45a70 100644
--- a/alembic/command.py
+++ b/alembic/command.py
@@ -561,6 +561,7 @@ def history(
     rev_range: Optional[str] = None,
     verbose: bool = False,
     indicate_current: bool = False,
+    reversed: bool = False,
 ) -> None:
     """List changeset scripts in chronological order.
 
@@ -592,7 +593,7 @@ def history(
 
     def _display_history(config, script, base, head, currents=()):
         for sc in script.walk_revisions(
-            base=base or "base", head=head or "heads"
+            base=base or "base", head=head or "heads", reversed=reversed
         ):
             if indicate_current:
                 sc._db_current_indicator = sc.revision in currents
diff --git a/alembic/config.py b/alembic/config.py
index 121a4459..06dd3d30 100644
--- a/alembic/config.py
+++ b/alembic/config.py
@@ -756,6 +756,14 @@ def __init__(self, prog: Optional[str] = None) -> None:
                 "generating one",
             ),
         ),
+        "reversed": (
+            "-R",
+            "--reversed",
+            dict(
+                action="store_true",
+                help="Show the history in the reversed order",
+            ),
+        ),
         "version_path": (
             "--version-path",
             dict(
diff --git a/alembic/script/base.py b/alembic/script/base.py
index f8417085..6e8a86b5 100644
--- a/alembic/script/base.py
+++ b/alembic/script/base.py
@@ -247,7 +247,7 @@ def _catch_revision_errors(
             raise util.CommandError(err.args[0]) from err
 
     def walk_revisions(
-        self, base: str = "base", head: str = "heads"
+        self, base: str = "base", head: str = "heads", reversed: bool = False
     ) -> Iterator[Script]:
         """Iterate through all revisions.
 
@@ -261,7 +261,11 @@ def walk_revisions(
         """
         with self._catch_revision_errors(start=base, end=head):
             for rev in self.revision_map.iterate_revisions(
-                head, base, inclusive=True, assert_relative_length=False
+                head,
+                base,
+                inclusive=True,
+                assert_relative_length=False,
+                reversed=reversed,
             ):
                 yield cast(Script, rev)
 
diff --git a/alembic/script/revision.py b/alembic/script/revision.py
index 5825da34..0e76f4c2 100644
--- a/alembic/script/revision.py
+++ b/alembic/script/revision.py
@@ -793,6 +793,7 @@ def iterate_revisions(
         inclusive: bool = False,
         assert_relative_length: bool = True,
         select_for_downgrade: bool = False,
+        reversed: bool = False,
     ) -> Iterator[Revision]:
         """Iterate through script revisions, starting at the given
         upper revision identifier and ending at the lower.
@@ -819,7 +820,12 @@ def iterate_revisions(
             assert_relative_length=assert_relative_length,
         )
 
-        for node in self._topological_sort(revisions, heads):
+        topological_sort = (
+            self._topological_sort(revisions, heads)[::-1]
+            if reversed
+            else self._topological_sort(revisions, heads)
+        )
+        for node in topological_sort:
             yield not_none(self.get_revision(node))
 
     def _get_descendant_nodes(

From 2eab5259df2f685021197beb83df3f766670ae16 Mon Sep 17 00:00:00 2001
From: Aravinth BALAKRISHNAN <aravinthbalakrishnan@gmail.com>
Date: Thu, 15 Jan 2026 10:47:10 +0100
Subject: [PATCH 2/2] Add test for the reversed flag

---
 tests/test_command.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/test_command.py b/tests/test_command.py
index 8608ba18..5f2ebffb 100644
--- a/tests/test_command.py
+++ b/tests/test_command.py
@@ -209,6 +209,16 @@ def test_history_indicate_current(self):
             buf, [self.c, self.b, self.a], currents=(self.b,), env_token=True
         )
 
+    def test_history_full_reversed(self):
+        self.cfg.stdout = buf = self._buf_fixture()
+        command.history(self.cfg, verbose=True, reversed=True)
+        self._eq_cmd_output(buf, [self.a, self.b, self.c])
+
+    def test_history_num_range_reversed(self):
+        self.cfg.stdout = buf = self._buf_fixture()
+        command.history(self.cfg, "%s:%s" % (self.a, self.b), verbose=True, reversed=True)
+        self._eq_cmd_output(buf, [self.a, self.b])
+
 
 class RevisionEnvironmentTest(_BufMixin, TestBase):
     def setUp(self):