Revert #1278 (Add build.mill setup)

.github/actions/setup-effekt/action.yml

@@ -1,5 +1,5 @@
 name: 'Setup Effekt Environment'
-description: 'Sets up Java, Node, SBT, Mill, and system dependencies for Effekt'
+description: 'Sets up Java, Node, SBT, and system dependencies for Effekt'
 
 inputs:
   java-version:
@@ -10,10 +10,6 @@ inputs:
     description: 'Node version to install'
     required: false
     default: '16.x'
-  mill-version:
-    description: 'Mill version to install'
-    required: false
-    default: '1.0.6'
   llvm-version:
     description: 'LLVM version to install'
     required: false
@@ -40,12 +36,6 @@ runs:
     - name: Setup SBT
       uses: sbt/setup-sbt@v1
 
-    - name: Setup Mill
-      if: runner.os != 'Windows'
-      uses: zhutmost/setup-mill@v1.3.0
-      with:
-        mill-version: ${{ inputs.mill-version }}
-
     - name: Set up NodeJS ${{ inputs.node-version }}
       uses: actions/setup-node@v4
       with:

.github/workflows/ci-pr.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: ./.github/actions/setup-effekt
 
       - name: Compile project
-        run: mill project.testCompile
+        run: sbt compile Test/compile
 
       - name: Cache compiled artifacts
         uses: actions/cache/save@v5
@@ -48,13 +48,15 @@ jobs:
 
       - name: Run internal tests
         run: |
-          mill -j1 project.testRemaining
+          sbt testRemaining
+          sbt kiamaJVM/test
+          sbt effektJS/test
 
       - name: Assemble fully optimized JS file
-        run: mill project.assembleJS
+        run: sbt effektJS/assembleJS
 
       - name: Install effekt binary
-        run: mill project.install
+        run: sbt install
 
       - name: Test effekt binary
         run: effekt --help
@@ -109,7 +111,7 @@ jobs:
       - uses: ./.github/actions/restore-build-cache
 
       - name: Run JavaScript backend tests
-        run: mill project.testBackendJS
+        run: sbt testBackendJS
 
   chez-tests:
     name: "Chez Backend"
@@ -127,7 +129,7 @@ jobs:
       - uses: ./.github/actions/restore-build-cache
 
       - name: Run Chez Scheme backend tests
-        run: mill --jobs 1 project.testBackendChez
+        run: sbt testBackendChez
 
   llvm-tests:
     name: "LLVM Backend"
@@ -146,4 +148,4 @@ jobs:
       - uses: ./.github/actions/restore-build-cache
 
       - name: Run LLVM backend tests (with debug & valgrind)
-        run: EFFEKT_VALGRIND=1 EFFEKT_DEBUG=1 mill project.testBackendLLVM
+        run: EFFEKT_VALGRIND=1 EFFEKT_DEBUG=1 sbt testBackendLLVM