[experiment] Mimir

.github/ci-extensions.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+<extensions>
+  <extension>
+    <groupId>eu.maveniverse.maven.mimir</groupId>
+    <artifactId>extension</artifactId>
+    <version>0.4.0</version>
+  </extension>
+</extensions>

.github/workflows/maven.yml

@@ -41,22 +41,28 @@ jobs:
         with:
           persist-credentials: false
 
-      - name: Cache Maven packages
+      - name: Prepare Mimir
+        shell: bash
+        run: |
+          mkdir -p ~/.m2
+          cp .github/ci-extensions.xml ~/.m2/extensions.xml
+
+      - name: Handle Mimir caches
         uses: actions/cache@v4
         with:
-          path: ~/.m2/repository/cached
-          key: maven-${{ runner.os }}-initial-${{ hashFiles('**/pom.xml') }}
+          path: ~/.mimir/local
+          key: mimir-${{ runner.os }}-initial-${{ hashFiles('**/pom.xml') }}
           restore-keys: |
-            maven-${{ runner.os }}-initial-
-            maven-${{ runner.os }}-
+            mimir-${{ runner.os }}-initial-
+            mimir-${{ runner.os }}-
 
       - name: Set up Maven
         shell: bash
         run: mvn --errors --batch-mode --show-version org.apache.maven.plugins:maven-wrapper-plugin:3.3.2:wrapper "-Dmaven=4.0.0-rc-2"
 
       - name: Build Maven distributions
         shell: bash
-        run: ./mvnw verify -e -B -V -Dmaven.repo.local=$HOME/.m2/repository/cached
+        run: ./mvnw verify -e -B -V
 
       - name: List contents of target directory
         shell: bash
@@ -102,6 +108,21 @@ jobs:
         with:
           persist-credentials: false
 
+      - name: Prepare Mimir
+        shell: bash
+        run: |
+          mkdir -p ~/.m2
+          cp .github/ci-extensions.xml ~/.m2/extensions.xml
+
+      - name: Handle Mimir caches
+        uses: actions/cache@v4
+        with:
+          path: ~/.mimir/local
+          key: mimir-${{ runner.os }}-full-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            mimir-${{ runner.os }}-full-
+            mimir-${{ runner.os }}-
+
       - name: Download Maven distribution
         uses: actions/download-artifact@v4
         with:
@@ -129,26 +150,17 @@ jobs:
           echo "MAVEN_HOME=$PWD/maven-local" >> $GITHUB_ENV
           echo "$PWD/maven-local/bin" >> $GITHUB_PATH
 
-      - name: Cache Maven packages
-        uses: actions/cache@v4
-        with:
-          path: ~/.m2/repository/cached
-          key: maven-${{ runner.os }}-full-${{ hashFiles('**/pom.xml') }}
-          restore-keys: |
-            maven-${{ runner.os }}-full-
-            maven-${{ runner.os }}-
-
       - name: Show IP
         shell: bash
         run: curl --silent https://api.ipify.org
 
       - name: Build with downloaded Maven
         shell: bash
-        run: mvn verify -Papache-release -Dgpg.skip=true -e -B -V -Dmaven.repo.local=$HOME/.m2/repository/cached
+        run: mvn verify -Papache-release -Dgpg.skip=true -e -B -V
 
       - name: Build site with downloaded Maven
         shell: bash
-        run: mvn site -e -B -V -Preporting -Dmaven.repo.local=$HOME/.m2/repository/cached
+        run: mvn site -e -B -V -Preporting
 
       - name: Upload test artifacts
         uses: actions/upload-artifact@v4
@@ -177,6 +189,21 @@ jobs:
         with:
           persist-credentials: false
 
+      - name: Prepare Mimir
+        shell: bash
+        run: |
+          mkdir -p ~/.m2
+          cp .github/ci-extensions.xml ~/.m2/extensions.xml
+
+      - name: Handle Mimir caches
+        uses: actions/cache@v4
+        with:
+          path: ~/.mimir/local
+          key: mimir-${{ runner.os }}-its-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            mimir-${{ runner.os }}-its-
+            mimir-${{ runner.os }}-
+
       - name: Download Maven distribution
         uses: actions/download-artifact@v4
         with:
@@ -204,33 +231,17 @@ jobs:
           echo "MAVEN_HOME=$PWD/maven-local" >> $GITHUB_ENV
           echo "$PWD/maven-local/bin" >> $GITHUB_PATH
 
-      - name: Cache Maven packages
-        uses: actions/cache@v4
-        with:
-          path: ~/.m2/repository/cached
-          key: maven-${{ runner.os }}-its-${{ hashFiles('**/pom.xml') }}
-          restore-keys: |
-            maven-${{ runner.os }}-its
-            maven-${{ runner.os }}-
-
       - name: Show IP
         shell: bash
         run: curl --silent https://api.ipify.org
 
-      # we use two steps so that we can cache artifacts downloaded from Maven Central repository
-      # without installing any local artifacts to not pollute the cache
-      - name: Build maven and ITs
-        shell: bash
-        run: mvn package -DskipTests -e -B -V -Prun-its -Dmaven.repo.local=$HOME/.m2/repository/cached
-
-      # Now run tests and ITs using a separate local repo (using the previous filled repo as tail)
-      - name: Run integration tests
+      - name: Build Maven and ITs and run them
         shell: bash
-        run: mvn install -e -B -V -Prun-its -Dmaven.repo.local=$HOME/.m2/repository/local -Dmaven.repo.local.tail=$HOME/.m2/repository/cached
+        run: mvn install -e -B -V -Prun-its
 
       - name: Upload test artifacts
         uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: ${{ github.run_number }}-integration-test-artifact-${{ runner.os }}-${{ matrix.java }}
-          path: ./its/core-it-suite/target/test-classes/
+          path: ./its/core-it-suite/target/test-classes/