ci: Scalafmt

.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@v4
+        with:
+          arguments: '--list'

.scalafmt.conf

@@ -0,0 +1,28 @@
+version = 3.8.3
+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
+
+rewrite.trailingCommas.style = keep
+
+align.tokens."+" = [
+  {
+    code   = "%"
+    owners = [
+      { regex = "Term.ApplyInfix" }
+    ]
+  },
+  {
+    code   = "%%"
+    owners = [
+      { regex = "Term.ApplyInfix" }
+    ]
+  }
+]

build.sbt

@@ -8,42 +8,51 @@ ThisBuild / version := {
     "9.0.0-SNAPSHOT"
   } else orig
 }
-lazy val root = (project in file ("."))
-    .enablePlugins(SbtPlugin)
-    .settings(
-      name := "flyway-sbt",
-      libraryDependencies ++= Seq(
-        "org.flywaydb" % "flyway-core" % flywayVersion
-      ),
-      scalacOptions ++= Seq(
-        "-deprecation",
-        "-unchecked",
-        "-Xfuture"
-      ),
-      pluginCrossBuild / sbtVersion := {
-        scalaBinaryVersion.value match {
-          case "2.12" => "1.5.8"
-          case _      => "2.0.0-M2"
-        }
-      },
-      Compile / doc / scalacOptions ++= {
-        Seq(
-          "-sourcepath",
-          (LocalRootProject / baseDirectory).value.getAbsolutePath,
-          "-doc-source-url",
-          s"""https://github.com/sbt/flyway-sbt/tree/${sys.process.Process("git rev-parse HEAD").lineStream_!.head}€{FILE_PATH}.scala"""
-        )
-      },
-      scriptedLaunchOpts := { scriptedLaunchOpts.value ++
+lazy val root = (project in file("."))
+  .enablePlugins(SbtPlugin)
+  .settings(
+    name := "flyway-sbt",
+    libraryDependencies ++= Seq(
+      "org.flywaydb" % "flyway-core" % flywayVersion
+    ),
+    scalacOptions ++= Seq(
+      "-deprecation",
+      "-unchecked",
+      "-Xfuture"
+    ),
+    pluginCrossBuild / sbtVersion := {
+      scalaBinaryVersion.value match {
+        case "2.12" => "1.5.8"
+        case _      => "2.0.0-M2"
+      }
+    },
+    Compile / doc / scalacOptions ++= {
+      Seq(
+        "-sourcepath",
+        (LocalRootProject / baseDirectory).value.getAbsolutePath,
+        "-doc-source-url",
+        s"""https://github.com/sbt/flyway-sbt/tree/${sys.process
+            .Process("git rev-parse HEAD")
+            .lineStream_!
+            .head}€{FILE_PATH}.scala"""
+      )
+    },
+    scriptedLaunchOpts := {
+      scriptedLaunchOpts.value ++
         Seq("-Xmx1024M", "-Dplugin.version=" + version.value)
-      },
-      scriptedBufferLog := false,
-      publishMavenStyle := true,
+    },
+    scriptedBufferLog := false,
+    publishMavenStyle := true,
   )
 
 ThisBuild / description := "An sbt plugin for Flyway database migration"
 ThisBuild / developers := List(
-  Developer(id="davidmweber", name="David Weber", email="[email protected]", url=url("https://davidmweber.github.io/flyway-sbt-docs/"))
+  Developer(
+    id = "davidmweber",
+    name = "David Weber",
+    email = "[email protected]",
+    url = url("https://davidmweber.github.io/flyway-sbt-docs/")
+  )
 )
 ThisBuild / licenses := Seq("Apache-2.0" -> url("http://www.apache.org/licenses/LICENSE-2.0.txt"))
 ThisBuild / scmInfo := Some(

project/plugin.sbt

@@ -1,2 +1,3 @@
 addSbtPlugin("com.github.sbt" % "sbt-ci-release"     % "1.9.0")
 addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.24.0")
+addSbtPlugin("org.scalameta"  % "sbt-scalafmt"       % "2.5.2")