davsclaus commented on code in PR #26330:
URL: https://github.com/apache/camel/pull/26330#discussion_r4002318829


##########
.github/workflows/dep-check.yml:
##########
@@ -0,0 +1,75 @@
+#
+# 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.
+#
+
+name: 'Dependency Analysis'
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - .claude-plugin/**
+      - .idea/**
+      - .github/**
+      - .oss-ai-helper-rules/**
+      - AGENTS.md
+      - README.md
+      - SECURITY.md
+      - Jenkinsfile
+      - Jenkinsfile.*
+      - NOTICE.txt
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || 
github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  dep-check:
+    if: github.repository == 'apache/camel'
+    name: Dependency Analysis (non-blocking)
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # 
v7.0.1
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # 
v4.7.1
+        with:
+          distribution: 'temurin'

Review Comment:
   All 12 other `setup-java` usages in `.github/workflows` pin v6.0.0; 
Dependabot will otherwise open a bump PR right away.
   
   ```suggestion
           uses: actions/setup-java@dd06d9cba3e5552c54d9f8ea23572deb30010f7c # 
v6.0.0
   ```



##########
.github/workflows/dep-check.yml:
##########
@@ -0,0 +1,75 @@
+#
+# 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.
+#
+
+name: 'Dependency Analysis'
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - .claude-plugin/**
+      - .idea/**
+      - .github/**
+      - .oss-ai-helper-rules/**
+      - AGENTS.md
+      - README.md
+      - SECURITY.md
+      - Jenkinsfile
+      - Jenkinsfile.*
+      - NOTICE.txt
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || 
github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  dep-check:
+    if: github.repository == 'apache/camel'
+    name: Dependency Analysis (non-blocking)
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # 
v7.0.1
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # 
v4.7.1
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+          cache: 'maven'
+
+      - name: Run dependency analysis
+        run: |
+          mvn verify -Pdep-check -DskipTests -Dlicense.skip -Dquickly \
+            --no-transfer-progress --batch-mode -q \
+            2>&1 | tee dep-check-output.txt || true

Review Comment:
   Two things here:
   
   - `-q` sets Maven's log level to ERROR, so the `[WARNING] Used undeclared 
dependencies found:` lines from `analyze-only` never reach 
`dep-check-output.txt`. Verified on `core/camel-util`: 0 findings with `-q`, 
the expected junit findings without it.
   - `|| true` hides genuine `BUILD FAILURE`s (which is how the `legal.xml` 
failure went unnoticed). Dependency warnings are already non-blocking via 
`failOnWarning=false`, and `continue-on-error: true` keeps the job from 
blocking the PR — so let the step itself go red when Maven fails.
   
   ```suggestion
             mvn verify -Pdep-check -DskipTests -Dlicense.skip -Dquickly \
               --no-transfer-progress --batch-mode \
               2>&1 | tee dep-check-output.txt
   ```



##########
pom.xml:
##########
@@ -992,6 +994,43 @@
                 </pluginRepository>
             </pluginRepositories>
         </profile>
+        <profile>
+            <!--
+                Opt-in dependency analysis profile.
+                Usage: mvn verify -Pdep-check [-DfailOnWarning=true]
+                Runs maven-dependency-plugin:analyze on every module and 
reports
+                used-undeclared / unused-declared dependencies.  Non-blocking 
by
+                default (failOnWarning=false); set -DfailOnWarning=true to 
enforce.
+            -->
+            <id>dep-check</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-dependency-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <id>dep-analyze</id>
+                                <goals>
+                                    <goal>analyze-only</goal>
+                                </goals>
+                                <phase>verify</phase>
+                                <configuration>
+                                    
<failOnWarning>${failOnWarning}</failOnWarning>
+                                    <outputXML>true</outputXML>
+                                    <ignoredUnusedDeclaredDependencies>
+                                        <!-- Logging implementations are 
runtime deps intentionally declared at compile scope -->
+                                        
<ignoredUnusedDeclaredDependency>org.apache.logging.log4j:log4j-slf4j2-impl</ignoredUnusedDeclaredDependency>
+                                        
<ignoredUnusedDeclaredDependency>org.apache.logging.log4j:log4j-core</ignoredUnusedDeclaredDependency>
+                                    </ignoredUnusedDeclaredDependencies>

Review Comment:
   Suggest also ignoring the JUnit aggregator/api pair, otherwise nearly every 
module in the reactor gets flagged twice (`parent/pom.xml` declares 
`junit-jupiter`, code compiles against `junit-jupiter-api`):
   
   ```suggestion
                                       <ignoredUnusedDeclaredDependencies>
                                           <!-- Logging implementations are 
runtime deps intentionally declared at compile scope -->
                                           
<ignoredUnusedDeclaredDependency>org.apache.logging.log4j:log4j-slf4j2-impl</ignoredUnusedDeclaredDependency>
                                           
<ignoredUnusedDeclaredDependency>org.apache.logging.log4j:log4j-core</ignoredUnusedDeclaredDependency>
                                           <!-- JUnit aggregator is declared in 
parent; code compiles against junit-jupiter-api -->
                                           
<ignoredUnusedDeclaredDependency>org.junit.jupiter:junit-jupiter</ignoredUnusedDeclaredDependency>
                                       </ignoredUnusedDeclaredDependencies>
                                       <ignoredUsedUndeclaredDependencies>
                                           
<ignoredUsedUndeclaredDependency>org.junit.jupiter:junit-jupiter-api</ignoredUsedUndeclaredDependency>
                                       </ignoredUsedUndeclaredDependencies>
   ```



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