From 96ffffad15c4ba3301da7f430a8412e19b02d352 Mon Sep 17 00:00:00 2001
From: David An <davidan@broadinstitute.org>
Date: Fri, 25 Oct 2024 12:56:53 -0400
Subject: [PATCH 1/3] scalafmt enforcement

---
 .github/workflows/format.yaml | 28 ++++++++++++++++++++++++++++
 project/Settings.scala        |  8 +++++++-
 project/plugins.sbt           |  2 ++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 .github/workflows/format.yaml

diff --git a/.github/workflows/format.yaml b/.github/workflows/format.yaml
new file mode 100644
index 000000000..026d95e81
--- /dev/null
+++ b/.github/workflows/format.yaml
@@ -0,0 +1,28 @@
+name: Check formatting for modified files with scalafmt
+
+on:
+  pull_request:
+    paths-ignore: ['**.md']
+
+jobs:
+  format:
+
+    runs-on: ubuntu-latest
+
+    steps:
+
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: sbt
+
+      - name: Check formatting for modified files
+        run: |
+          sbt scalafmtCheckAll
diff --git a/project/Settings.scala b/project/Settings.scala
index a129c18f5..63410b082 100644
--- a/project/Settings.scala
+++ b/project/Settings.scala
@@ -5,6 +5,7 @@ import Version._
 import sbt.Keys._
 import sbt._
 import sbtassembly.AssemblyPlugin.autoImport._
+import org.scalafmt.sbt.ScalafmtPlugin.autoImport.scalafmtFilter
 
 object Settings {
 
@@ -41,9 +42,14 @@ object Settings {
     assembly / test := {}
   )
 
+  val scalafmtSettings = List(
+    Global / excludeLintKeys += scalafmtFilter,
+    Global / scalafmtFilter := "diff-ref=HEAD^"
+  )
+
   //common settings for all sbt subprojects
   val commonSettings =
-    commonBuildSettings ++ commonAssemblySettings ++ commonTestSettings ++ List(
+    commonBuildSettings ++ commonAssemblySettings ++ commonTestSettings ++ scalafmtSettings ++ List(
     organization  := "org.broadinstitute.dsde.firecloud",
     scalaVersion  := "2.13.15",
     resolvers := proxyResolvers ++: resolvers.value ++: commonResolvers,
diff --git a/project/plugins.sbt b/project/plugins.sbt
index b2c566a19..d26c78e72 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -4,4 +4,6 @@ addSbtPlugin("io.spray" % "sbt-revolver" % "0.10.0")
 
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.2.1")
 
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
+
 addDependencyTreePlugin

From 950436b0e9d1bdd1b7d3863869b1e295b6688064 Mon Sep 17 00:00:00 2001
From: David An <davidan@broadinstitute.org>
Date: Fri, 25 Oct 2024 13:33:44 -0400
Subject: [PATCH 2/3] ignore mass scalafmt

---
 .git-blame-ignore-revs | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 .git-blame-ignore-revs

diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 000000000..8bec14609
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,4 @@
+# .git-blame-ignore-revs
+
+# scalafmt mass change
+579d6ffd2c2d25c0e8cdab7ea83ca630de043c8b

From d640b5410b68adf4f441d2494bfa3c3c4045947b Mon Sep 17 00:00:00 2001
From: David An <davidan@broadinstitute.org>
Date: Fri, 25 Oct 2024 14:09:30 -0400
Subject: [PATCH 3/3] set proper commit to ignore mass scalafmt

---
 .git-blame-ignore-revs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index 8bec14609..958413331 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -1,4 +1,4 @@
 # .git-blame-ignore-revs
 
 # scalafmt mass change
-579d6ffd2c2d25c0e8cdab7ea83ca630de043c8b
+3686bb47a5b215733a46c3393a51e950fcaa635f