CI: add bors.toml

bors.toml

@@ -0,0 +1,28 @@
+# List of commit statuses that must pass on the PR commit when it is r+-ed.
+# (listed in same order as in the repo's branch protection settings)
+pr_status = [
+ "python-tests",
+ "tools-build",
+ "check-labels",
+ "static-tests",
+ "check-commits (commit-msg)",
+ "check-commits (pr-check)",
+ "Murdock",
+ ]
+
+# List of commit statuses that must pass on the merge commit before it is
+# pushed to master.
+status = [
+  "Murdock",
+  "static-tests",
+  "tools-build",
+  ]
+
+# Number of project members who must approve the PR (using GitHub Reviews)
+# before it is pushed to master.
+# This necessary even with the check-labels action (which checks for >1 ACKs),
+# as that passes when there's no review or no special label set.
+required_approvals = 1
+
+# delete branch after successful merge
+delete_merged_branches = true