Add git_shallow_fetch_since to checkout.py

src/e3/anod/checkout.py

@@ -243,15 +243,26 @@ def update_git(
         try:
             old_commit = g.rev_parse()
 
+            shallow_cmd: str | None = None
+
             # Using fetch + checkout ensure caching is effective
-            shallow = "git_shallow_fetch" in os.environ.get(
+            shallow_fetch = "git_shallow_fetch" in os.environ.get(
                 "E3_ENABLE_FEATURE", ""
-            ).split(",") and (not self.compute_changelog or not old_commit)
+            ).split(",")
+
+            if shallow_fetch and (not self.compute_changelog or not old_commit):
+                shallow_cmd = "--depth=1"
+
+            for feature in os.environ.get("E3_ENABLE_FEATURE", "").split(","):
+                if "git_fetch_shallow_since" in feature:
+                    date = feature.replace("git_fetch_shallow_since=", "")
+                    shallow_cmd = f"--shallow-since={date}"
+
             g.git_cmd(
                 [
                     "fetch",
                     "-f",
-                    "--depth=1" if shallow else None,
+                    shallow_cmd,
                     remote_name,
                     f"{revision}:refs/e3-checkout",
                 ]

tests/tests_e3/anod/checkout_test.py

@@ -154,3 +154,45 @@ def test_svn_checkout(self, svn, compute_changelog, e3_feature):
 
         result = m.update(vcs="external", url=os.path.abspath("git2"))
         assert result == ReturnValue.unchanged
+
+    def test_shallow_since_checkout(self):
+        os.environ["GIT_AUTHOR_EMAIL"] = "e3-core@example.net"
+        os.environ["GIT_AUTHOR_NAME"] = "e3 core"
+        os.environ["GIT_COMMITTER_NAME"] = "e3 core"
+        os.environ["GIT_COMMITTER_EMAIL"] = "e3-core@example.net"
+        os.environ["E3_ENABLE_FEATURE"] = "git_fetch_shallow_since=2020-08-04"
+        os.environ["GIT_COMMITTER_DATE"] = "2020-08-01T22:13:13"
+
+        url = GitRepository.create("git3")
+
+        with open(os.path.join("git3", "file3.txt"), "w") as fd:
+            fd.write("first file!")
+        with open(os.path.join("git3", "file4.txt"), "w") as fd:
+            fd.write("second file!")
+
+        m = CheckoutManager(name="myrepo", working_dir=".")
+
+        r = GitRepository(os.path.abspath("git3"))
+
+        r.git_cmd(["add", "file3.txt"])
+        r.git_cmd(["commit", "-m", "first commit", "--date", "2020-08-01T22:13:13"])
+
+        os.environ["GIT_COMMITTER_DATE"] = "2020-08-05T22:13:13"
+        r.git_cmd(["add", "file4.txt"])
+        r.git_cmd(["commit", "-m", "second commit", "--date", "2020-08-05T22:13:13"])
+
+        result = m.update(vcs="git", url=url, revision="master")
+        print("test")
+        r.git_cmd(["log"])
+        print("test")
+
+        myrepo = GitRepository(os.path.abspath("myrepo"))
+        myrepo.git_cmd(["log", "--pretty=format:%s"], output="log.txt")
+
+        with open("log.txt", "r") as fd:
+            log = fd.readlines()
+
+        assert result == ReturnValue.success
+        assert os.path.isfile(os.path.join("myrepo", "file3.txt"))
+        assert os.path.isfile(os.path.join("myrepo", "file4.txt"))
+        assert log == ["second commit"]