Merge pull request #1989 from satorg/introduce-scalafmt

Add 'scalafmt' to the project

.git-blame-ignore-revs

@@ -0,0 +1,5 @@
+# Introduce scalafmt [PR #1989]
+4eab00000c6f22d0d0fee379f234e287dc7649bd
+8c04f656ec5e21d6142ebde4539a00003b27a499
+f6e03013f4c4a29074f528ac468129bdd2df63d3
+13d6c997bb231bbae2bb1a9427d0fc4eb226e853

.github/workflows/ci.yml

@@ -60,6 +60,10 @@ jobs:
       - name: Check that workflows are up to date
         run: sbt githubWorkflowCheck
 
+      - name: Check formatting
+        if: matrix.java == 'temurin@11' && matrix.os == 'ubuntu-latest'
+        run: sbt '++ ${{ matrix.scala }}' scalafmtCheckAll 'project /' scalafmtSbtCheck
+
       - name: Test
         run: sbt '++ ${{ matrix.scala }}' freeGen2 test
 

.scalafmt.conf

@@ -0,0 +1,32 @@
+version=3.8.2
+maxColumn = 120
+assumeStandardLibraryStripMargin = true
+
+preset = default
+align {
+  stripMargin = true
+}
+
+danglingParentheses {
+  callSite = false
+}
+
+newlines {
+  source = keep
+}
+
+runner.dialect = scala213source3
+fileOverride {
+  "glob:**/*.sbt" {
+    runner.dialect = sbt1
+  }
+  "glob:**/src/{main,test}/scala-2.13-/**" {
+    runner.dialect = scala212source3
+  }
+  "glob:**/src/{main,test}/scala-3/**" {
+    runner.dialect = scala3
+  }
+}
+project.excludeFilters = [
+  "scalafix/*"
+]