Gracefully ignore bad remove-project line

Sometimes, we don't care if the remove project is referring to a
non-existing project and we can just ignore it.  This change allows us
to ignore remove-project entries if the project that they refer to
doesn't exist, making them effectively a no-op.

Because this change breaks existing configuration, we allow this to be
configuration controlled using the `optional` attribute in the
remove-project tag.

Change-Id: I6313a02983e81344eadcb4e47d7d6b037ee7420e
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/310964
Tested-by: Michael Kelly <mkelly@arista.com>
Reviewed-by: Mike Frysinger <vapier@google.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/tests/test_manifest_xml.py b/tests/test_manifest_xml.py
index 55468b51..96ee4c4a 100644
--- a/tests/test_manifest_xml.py
+++ b/tests/test_manifest_xml.py
@@ -638,3 +638,53 @@ class RemoteElementTests(ManifestParseTestCase):
     self.assertNotEqual(a, manifest_xml._Default())
     self.assertNotEqual(a, 123)
     self.assertNotEqual(a, None)
+
+
+class RemoveProjectElementTests(ManifestParseTestCase):
+  """Tests for <remove-project>."""
+
+  def test_remove_one_project(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <remove-project name="myproject" />
+</manifest>
+""")
+    self.assertEqual(manifest.projects, [])
+
+  def test_remove_one_project_one_remains(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <project name="yourproject" />
+  <remove-project name="myproject" />
+</manifest>
+""")
+
+    self.assertEqual(len(manifest.projects), 1)
+    self.assertEqual(manifest.projects[0].name, 'yourproject')
+
+  def test_remove_one_project_doesnt_exist(self):
+    with self.assertRaises(manifest_xml.ManifestParseError):
+      manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <remove-project name="myproject" />
+</manifest>
+""")
+      manifest.projects
+
+  def test_remove_one_optional_project_doesnt_exist(self):
+    manifest = self.getXmlManifest("""
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <remove-project name="myproject" optional="true" />
+</manifest>
+""")
+    self.assertEqual(manifest.projects, [])