Switch to Mill (#496)

Author: alexarchambault

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
       with:
         jvm: 8
     - name: Test
-      run: sbtn ++${{ matrix.SCALA_VERSION }} test
+      run: ./mill -i '__[${{ matrix.SCALA_VERSION }}].test'
 
   bin-compat:
     runs-on: ubuntu-latest
@@ -37,8 +37,8 @@ jobs:
     - uses: coursier/[email protected]
       with:
         jvm: 8
-    - name: Test
-      run: sbtn +mimaReportBinaryIssues
+    - name: Check
+      run: ./mill -i __.mimaReportBinaryIssues
 
   format:
     runs-on: ubuntu-latest
@@ -72,7 +72,7 @@ jobs:
     - name: Wrap GPG binary
       run: .github/scripts/wrap-gpg.sh
     - name: Release
-      run: sbtn ci-release
+      run: ./mill -i publishSonatype __.publishArtifacts
       env:
         PGP_PASSPHRASE: ${{ secrets.PUBLISH_SECRET_KEY_PASSWORD }}
         PGP_SECRET: ${{ secrets.PUBLISH_SECRET_KEY }}

.gitignore

@@ -1,4 +1,4 @@
-target/
+out/
 .bsp/
 .idea
 .idea_modules
@@ -7,4 +7,3 @@ target/
 .bloop/
 .metals/
 .vscode/
-project/metals.sbt

.mill-version

@@ -0,0 +1 @@
+0.11.7-109-59a5cb