From a3487bf90055e5587add5f89377e951cada9c851 Mon Sep 17 00:00:00 2001
From: Andrew Valencik <andrew.valencik@gmail.com>
Date: Wed, 5 Apr 2023 15:47:28 -0400
Subject: [PATCH] Cross build to scala 2.12

---
 .github/workflows/ci.yml | 22 +++++++++++++++++++++-
 build.sbt                |  3 ++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0b54eee..40730f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.13.10, 3.2.1]
+        scala: [2.12.17, 2.13.10, 3.2.1]
         java: [temurin@11]
         project: [rootJS, rootJVM]
     runs-on: ${{ matrix.os }}
@@ -147,6 +147,26 @@ jobs:
             ~/Library/Caches/Coursier/v1
           key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
 
+      - name: Download target directories (2.12.17, rootJS)
+        uses: actions/download-artifact@v2
+        with:
+          name: target-${{ matrix.os }}-${{ matrix.java }}-2.12.17-rootJS
+
+      - name: Inflate target directories (2.12.17, rootJS)
+        run: |
+          tar xf targets.tar
+          rm targets.tar
+
+      - name: Download target directories (2.12.17, rootJVM)
+        uses: actions/download-artifact@v2
+        with:
+          name: target-${{ matrix.os }}-${{ matrix.java }}-2.12.17-rootJVM
+
+      - name: Inflate target directories (2.12.17, rootJVM)
+        run: |
+          tar xf targets.tar
+          rm targets.tar
+
       - name: Download target directories (2.13.10, rootJS)
         uses: actions/download-artifact@v2
         with:
diff --git a/build.sbt b/build.sbt
index 4f2ef11..67ca1e8 100644
--- a/build.sbt
+++ b/build.sbt
@@ -23,8 +23,9 @@ ThisBuild / tlCiReleaseBranches := Seq("main")
 // use JDK 11
 ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec.temurin("11"))
 
+val Scala212 = "2.12.17"
 val Scala213 = "2.13.10"
-ThisBuild / crossScalaVersions := Seq(Scala213, "3.2.1")
+ThisBuild / crossScalaVersions := Seq(Scala212, Scala213, "3.2.1")
 ThisBuild / scalaVersion := Scala213 // the default Scala
 
 lazy val root = tlCrossRootProject.aggregate(core)