Rebootstrap, add linux-arm test job, make use of selective.resolveChanged (#4359)

Author: lihaoyi

.config/mill-version

@@ -1 +1 @@
-0.12.5-144-22bb1b-native
+0.12.5-150-31d41c-native

.github/workflows/post-build-selective.yml

@@ -77,6 +77,8 @@ jobs:
 
       - run: ./mill -i -k selective.resolveTree ${{ inputs.millargs }}
 
+      - run: ./mill -i -k selective.resolveChanged ${{ inputs.millargs }}
+
       - run: ./mill -i -j1 -k selective.run ${{ inputs.millargs }}
         if: ${{ inputs.install-android-sdk }}
         env:

.github/workflows/run-tests.yml

@@ -83,11 +83,23 @@ jobs:
       - run: "echo temurin:17 > .mill-jvm-version"
 
       - uses: actions/setup-node@v4
-        with:
-          node-version: '22'
+        with: { node-version: '22' }
 
       - run: ./mill -i example.scalalib.__.local.server.test
 
+  linux-arm:
+    if: (github.event.action == 'ready_for_review') || (github.event.pull_request.draft == false)
+    runs-on: ubuntu-24.04-arm
+    steps:
+      - uses: actions/checkout@v4
+        with: { fetch-depth: 1 }
+
+      - run: "echo temurin:17 > .mill-jvm-version"
+
+      - uses: actions/setup-node@v4
+        with: { node-version: '22' }
+      - run: ./mill -i example.kotlinlib.__.local.server.test
+
   linux:
     needs: build-linux
     strategy:
@@ -115,10 +127,6 @@ jobs:
             millargs: "'example.javalib.__.native.server.test'"
             install-android-sdk: false
 
-          - java-version: 17
-            millargs: "'example.kotlinlib.__.local.server.test'"
-            install-android-sdk: false
-
           - java-version: 17
             millargs: "'example.android.__.local.server.test'"
             install-android-sdk: true

mill

@@ -108,7 +108,12 @@ case "$MILL_VERSION" in
     *"$MILL_NATIVE_SUFFIX")
   MILL_VERSION=${MILL_VERSION%"$MILL_NATIVE_SUFFIX"}
   if [ "$(expr substr $(uname -s) 1 5 2>/dev/null)" = "Linux" ]; then
-    ARTIFACT_SUFFIX="-native-linux-amd64"
+
+    if [ "$(uname -m)" = "aarch64" ]; then
+      ARTIFACT_SUFFIX="-native-linux-aarch64"
+    else
+      ARTIFACT_SUFFIX="-native-linux-amd64"
+    fi
   elif [ "$(uname)" = "Darwin" ]; then
     ARTIFACT_SUFFIX="-native-mac-aarch64"
   else