Add support to generate container tags based on given version input

Signed-off-by: Tobias Wolf <wolf@b1-systems.de>
On-behalf-of: SAP <tobias.wolf@sap.com>

Author: NotTheEvilOne

src/gardenlinux/features/__main__.py

@@ -20,6 +20,7 @@
     "cname",
     "cname_base",
     "container_name",
+    "container_tag",
     "commit_id",
     "features",
     "platforms",
@@ -117,7 +118,7 @@ def main() -> None:
     if (
         version is None
         or version == ""
-        and (args.type in ("cname", "commit_id", "version", "version_and_commit_id"))
+        and (args.type in ("cname", "container_tag", "commit_id", "version", "version_and_commit_id"))
     ):
         raise RuntimeError("Version not specified and no default version set")
 
@@ -146,6 +147,8 @@ def main() -> None:
             print_output_from_cname(args.type, cname)
     elif args.type == "commit_id":
         print(commit_id_or_hash[:8])
+    elif args.type == "container_tag":
+        print(re.sub("\\W+", "-", f"{version}-{commit_id_or_hash[:8]}"))
     elif args.type == "version":
         print(version)
     elif args.type == "version_and_commit_id":

tests/features/test_main.py

@@ -160,6 +160,20 @@ def test_main_prints_container_name(monkeypatch, capsys):
     assert "container-python-dev" in out
 
 
+def test_main_prints_container_tag(monkeypatch, capsys):
+    # Arrange
+    argv = ["prog", "--arch", "amd64", "--cname", "flav", "--version", "1.0", "--commit", "~post1", "container_tag"]
+    monkeypatch.setattr(sys, "argv", argv)
+    monkeypatch.setattr(fema, "Parser", lambda *a, **kw: None)
+
+    # Act
+    fema.main()
+
+    # Assert
+    out = capsys.readouterr().out.strip()
+    assert "1-0-post1" == out
+
+
 def test_main_prints_commit_id(monkeypatch, capsys):
     # Arrange
     argv = ["prog", "--arch", "amd64", "--cname", "flav", "commit_id"]