[REM] runbot_merge: support for squash+/squash-

AL thinks it's not useful and it's better to always squash/rebase a
single commit & merge multiple. Mark tests as xfail'd instead of
removing them.

Also mark test_edit_retarget_managed as skipped explicitly

runbot_merge/models/pull_requests.py

@@ -43,7 +43,7 @@ class Project(models.Model):
         required=True,
         default="hanson", # mergebot du bot du bot du~
         help="Prefix (~bot name) used when sending commands from PR "
-             "comments e.g. [hanson retry] or [hanson r+ p=1 squash+]"
+             "comments e.g. [hanson retry] or [hanson r+ p=1]"
     )
 
     batch_limit = fields.Integer(
@@ -407,11 +407,6 @@ class PullRequests(models.Model):
                 return ('review', True)
             elif flag == '-':
                 return ('review', False)
-        elif name == 'squash':
-            if flag == '+':
-                return ('squash', True)
-            elif flag == '-':
-                return ('squash', False)
         elif name == 'delegate':
             if flag == '+':
                 return ('delegate', True)
@@ -432,9 +427,6 @@ class PullRequests(models.Model):
           resets a PR in error mode to ready for staging
         r(eview)+/-
            approves or disapproves a PR (disapproving just cancels an approval)
-        squash+/squash-
-          marks the PR as squash or merge, can override squash inference or a
-          previous squash command
         delegate+/delegate=<users>
           adds either PR author or the specified (github) users as
           authorised reviewers for this PR. ``<users>`` is a
@@ -495,11 +487,6 @@ class PullRequests(models.Model):
                                 'github_login': login,
                             })
                     delegates.write({'delegate_reviewer': [(4, self.id, 0)]})
-
-            elif command == 'squash':
-                if is_admin:
-                    ok = True
-                    self.squash = param
             elif command == 'priority':
                 if is_admin:
                     ok = True

runbot_merge/tests/test_basic.py

@@ -330,6 +330,7 @@ def test_edit(env, repo):
         ('number', '=', prx.number)
     ]).target == branch_1
 
+@pytest.mark.skip(reason="what do?")
 def test_edit_retarget_managed(env, repo):
     """ A PR targeted to an un-managed branch is ignored but if the PR
     is re-targeted to a managed branch it should be managed
@@ -493,10 +494,8 @@ class TestRetry:
 
 class TestSquashing(object):
     """
-    * if event['pull_request']['commits'] == 1 and not disabled,
-      squash-merge during staging (using sole commit's message) instead
-      of regular merge (using PR info)
-    * if 1+ commit but enabled, squash using PR info
+    if event['pull_request']['commits'] == 1, "squash" (/rebase); otherwise
+    regular merge
     """
     def test_staging_merge_squash(self, repo, env):
         m = repo.make_commit(None, 'initial', None, tree={'m': 'm'})
@@ -537,6 +536,7 @@ class TestSquashing(object):
         ]).state == 'merged'
         assert prx.state == 'closed'
 
+    @pytest.mark.xfail(reason="removed support for squash+ command")
     def test_force_squash_merge(self, repo, env):
         m = repo.make_commit(None, 'initial', None, tree={'m': 'm'})
         m2 = repo.make_commit(m, 'second', None, tree={'m': 'm', 'm2': 'm2'})
@@ -577,6 +577,7 @@ class TestSquashing(object):
         ]).state == 'merged'
         assert prx.state == 'closed'
 
+    @pytest.mark.xfail(reason="removed support for squash- command")
     def test_disable_squash_merge(self, repo, env):
         m = repo.make_commit(None, 'initial', None, tree={'m': 'm'})
         m2 = repo.make_commit(m, 'second', None, tree={'m': 'm', 'm2': 'm2'})