Add Mergify to the build

.mergify.yml

@@ -0,0 +1,82 @@
+# This file was automatically generated by sbt-typelevel-mergify using the
+# mergifyGenerate task. You should add and commit this file to
+# your git repository. It goes without saying that you shouldn't edit
+# this file by hand! Instead, if you wish to make changes, you should
+# change your sbt build configuration to revise the mergify configuration
+# to meet your needs, then regenerate this file.
+
+pull_request_rules:
+- name: merge scala-steward's PRs
+  conditions:
+  - author=typelevel-steward[bot]
+  - or:
+    - body~=labels:.*early-semver-patch
+    - body~=labels:.*early-semver-minor
+  - status-success=Test (ubuntu-22.04, 2.12, temurin@8)
+  - status-success=Test (ubuntu-22.04, 2.13, temurin@8)
+  actions:
+    merge: {}
+- name: Label benchmark PRs
+  conditions:
+  - files~=^benchmark/
+  actions:
+    label:
+      add:
+      - benchmark
+      remove: []
+- name: Label effect3 PRs
+  conditions:
+  - files~=^effect3/
+  actions:
+    label:
+      add:
+      - effect3
+      remove: []
+- name: Label finagle PRs
+  conditions:
+  - files~=^finagle/
+  actions:
+    label:
+      add:
+      - finagle
+      remove: []
+- name: Label input PRs
+  conditions:
+  - files~=^scalafix/input/
+  actions:
+    label:
+      add:
+      - input
+      remove: []
+- name: Label output PRs
+  conditions:
+  - files~=^scalafix/output/
+  actions:
+    label:
+      add:
+      - output
+      remove: []
+- name: Label rules PRs
+  conditions:
+  - files~=^scalafix/rules/
+  actions:
+    label:
+      add:
+      - rules
+      remove: []
+- name: Label tests PRs
+  conditions:
+  - files~=^scalafix/tests/
+  actions:
+    label:
+      add:
+      - tests
+      remove: []
+- name: Label util PRs
+  conditions:
+  - files~=^util/
+  actions:
+    label:
+      add:
+      - util
+      remove: []

build.sbt

@@ -148,6 +148,12 @@ ThisBuild / githubWorkflowBuild := Seq(
   )
 )
 
+ThisBuild / mergifyStewardConfig ~= {
+  _.map {
+    _.withMergeMinors(true).withAuthor("typelevel-steward[bot]")
+  }
+}
+
 lazy val `scalafix-rules` = (project in file("scalafix/rules"))
   .settings(allSettings)
   .settings(

project/plugins.sbt

@@ -1,5 +1,6 @@
 addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.6.0")
 addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.8.2")
+addSbtPlugin("org.typelevel" % "sbt-typelevel-mergify" % "0.8.2")
 addSbtPlugin("com.github.sbt" % "sbt-ghpages" % "0.9.0")
 addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "1.0.0")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.3.1")