add workflow file

.github/actions/build-keycloak/action.yml

@@ -0,0 +1,53 @@
+name: Build Keycloak
+description: Builds Keycloak providing Maven repository with all artifacts
+
+runs:
+  using: composite
+  steps:
+    - id: setup-java
+      name: Setup Java
+      uses: ./.github/actions/java-setup
+
+    - id: maven-cache
+      name: Maven cache
+      uses: ./.github/actions/maven-cache
+      with:
+        create-cache-if-it-doesnt-exist: true
+
+    - id: phantomjs-cache
+      name: PhantomJS cache
+      uses: ./.github/actions/phantomjs-cache
+
+    - id: frontend-plugin-cache
+      name: Frontend Plugin Cache
+      uses: ./.github/actions/frontend-plugin-cache
+
+    # Remove once https://github.com/keycloak/keycloak/issues/19299 is solved
+    ########################################################################################################
+    - id: check-adapter-changes
+      if: github.event_name == 'pull_request'
+      name: Check changes for WildFly adapters
+      shell: bash
+      # If there are no changes for WildFly adapters, we use adapters built in the latest nightly build
+      run: |
+        WF_ADAPTERS_REGEX="^adapters/oidc/wildfly|^adapters/saml/wildfly"
+
+        git fetch origin --tags --force
+
+        echo "GIT_WF_ADAPTERS_DIFF=$(git diff origin/main --name-only | egrep -ic -e "$WF_ADAPTERS_REGEX")" >> $GITHUB_ENV
+        echo "NIGHTLY_DIFF=$(git diff nightly --name-only | egrep -ic -e "$WF_ADAPTERS_REGEX")" >> $GITHUB_ENV
+
+    - id: set-maven-profile
+      if: ${{ github.event_name != 'pull_request' || env.GIT_WF_ADAPTERS_DIFF != 0 || env.NIGHTLY_DIFF != 0}}
+      name: Set profile for building distribution
+      shell: bash
+      run: |
+        echo "MVN_PROFILES=-Pdistribution" >> $GITHUB_ENV
+        echo "WildFly adapters will be built in our codebase"
+    ########################################################################################################
+    - id: build-keycloak
+      name: Build Keycloak
+      shell: bash
+      # By using "dependency:resolve", it will download all dependencies used in later stages for running the tests
+      run: |
+        ./mvnw install dependency:resolve -V -e -DskipTests -DskipExamples ${{ env.MVN_PROFILES}}