commit 13fec68f1440b3cbd9f21c345f90ceaa94f838b0
author Edwin Kempin <ekempin@google.com> Wed Jan 20 11:21:57 2021 +0100
committer Edwin Kempin <ekempin@google.com> Tue Jan 26 10:22:32 2021 +0100
tree 02362039962ab74434eee7655328baf74810c68f
parent 0071e0028f7b8c20b7a92a15c1799482269e87e3

Add change message with the owned files when code owner is added as reviewer

When a code owner is added as a reviewer add a change message that lists
the paths that are owned by this user. This way it gets transparent
which files can be approved by this reviewer.

Gerrit core doesn’t add a change message when a reviewer is added to a
change. Hence there is no message that we can extend, but we rather must
post our own change message.

The paths in the change message are absolute file paths. They do not
have a leading '/' so that they match the paths in the file list on the
change screen which also do not have a leading '/'.

Example change message:

"John Doe who was added as reviewer owns the following files:
* foo/bar.baz
* foo/baz.bar
* foo/bar/baz.foo"

Same as for the message posted by CodeOwnersOnPostReview the
'plugin.code-owners.maxPathsInChangeMessages' configuration parameter
limits the paths that are included into the message.

The change message is posted with a autogenerated tag so that these
messages do not show up by default on the change screen, as they may be
perceived as too verbose otherwise.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ifc79fce2ba5e8295a9c4b66feaa959245cbe7cc9