From 014a7654db71b151198164da65ef610f539cdac1 Mon Sep 17 00:00:00 2001
From: Matthew de Detrich <matthew.dedetrich@aiven.io>
Date: Tue, 23 Jan 2024 08:22:27 +1100
Subject: [PATCH] Add scalafmt

---
 .github/workflows/format.yml | 23 +++++++++++++++++++++++
 .scalafmt.conf               | 26 ++++++++++++++++++++++++++
 project/plugins.sbt          |  1 +
 3 files changed, 50 insertions(+)
 create mode 100644 .github/workflows/format.yml
 create mode 100644 .scalafmt.conf

diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
new file mode 100644
index 0000000..c7698ac
--- /dev/null
+++ b/.github/workflows/format.yml
@@ -0,0 +1,23 @@
+name: Scalafmt
+
+permissions: {}
+
+on:
+  pull_request:
+    branches: ['**']
+
+jobs:
+  build:
+    name: Code is formatted
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout current branch (full)
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Check project is formatted
+        uses: jrouly/scalafmt-native-action@v3
+        with:
+          arguments: '--list --mode diff-ref=origin/main'
diff --git a/.scalafmt.conf b/.scalafmt.conf
new file mode 100644
index 0000000..75e1b1f
--- /dev/null
+++ b/.scalafmt.conf
@@ -0,0 +1,26 @@
+version = 3.7.17
+runner.dialect = scala212
+maxColumn = 120
+project.git = true
+
+# http://docs.scala-lang.org/style/scaladoc.html recommends the JavaDoc style.
+# scala/scala is written that way too https://github.com/scala/scala/blob/v2.12.2/src/library/scala/Predef.scala
+docstrings.style = Asterisk
+
+# This also seems more idiomatic to include whitespace in import x.{ yyy }
+spaces.inImportCurlyBraces = true
+
+align.tokens."+" = [
+  {
+    code   = "%"
+    owners = [
+      { regex = "Term.ApplyInfix" }
+    ]
+  },
+  {
+    code   = "%%"
+    owners = [
+      { regex = "Term.ApplyInfix" }
+    ]
+  }
+]
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 7a811dd..23658cb 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,2 +1,3 @@
 addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.22.0")
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.12")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")