TS-44960 Revision not picked op

.gitignore

@@ -12,3 +12,4 @@ report-generator/test-coverage-*.xml
 **/logTest/**
 **/jacoco.exec
 **/target/**
+.claude/settings.local.json

CHANGELOG.md

@@ -7,6 +7,7 @@ We use [semantic versioning](http://semver.org/):
 # Next version
 - _maven-plugin_: Added maven properties for `runImpacted` and `runAllTests` configuration parameters
 - _maven-plugin_: The warning "Both baselineRevision and baselineCommit are set but only one of them is needed" was displayed incorrectly
+- [fix] _maven-plugin_: Coverage upload used "Now" instead of auto-resolved Git revision when no commit/revision was configured
 
 # 36.2.0
 - _agent_: improved logging when multiple agents are attached

CLAUDE.md

@@ -0,0 +1,73 @@
+## Build Commands
+
+```bash
+# Build with tests
+./gradlew build
+
+# Build without tests
+./gradlew assemble
+
+# Run all tests for a module
+./gradlew :agent:test
+
+# Run a single test
+./gradlew :agent:test --tests "com.teamscale.jacoco.agent.MyTest.testMethod"
+
+# Publish to local Maven repo (for local plugin testing)
+./gradlew publishToMavenLocal
+
+# Build Docker image
+docker build -f agent/src/docker/Dockerfile .
+
+# Compile for different JaCoCo version (don't commit unless upgrading)
+./gradlew dist
+```
+
+## Project Architecture
+
+This is a multi-module Gradle project (Java 21 toolchain, targets Java 8) that provides a JVM profiler for collecting code coverage and uploading it to Teamscale.
+
+### Core Modules
+
+- **agent** - Main Java agent that instruments bytecode via JaCoCo and collects coverage
+- **report-generator** - Converts JaCoCo binary execution data to XML/testwise coverage formats
+- **teamscale-client** - HTTP client library for Teamscale server communication
+- **tia-client** - Test Impact Analysis client for identifying impacted tests
+
+### Build Tool Plugins
+
+- **teamscale-gradle-plugin** - Gradle plugin for coverage collection and test-wise execution
+- **teamscale-maven-plugin** - Maven plugin with equivalent functionality
+- **impacted-test-engine** - JUnit 5 engine that queries Teamscale for impacted tests
+
+### Agent Internals
+
+Entry point: `PreMain.premain()` in `agent/src/main/java/com/teamscale/jacoco/agent/PreMain.java`
+
+**Initialization flow:**
+1. JVM loads agent via `-javaagent` parameter
+2. `PreMain.premain()` parses options and initializes logging
+3. `JaCoCoPreMain` registers `LenientCoverageTransformer` with the JVM
+4. Classes are instrumented at load time with coverage probes
+
+**Coverage modes:**
+- **Interval-based** (`Agent` class) - Periodically dumps coverage (default every 10 min)
+- **Test-wise** (`TestwiseCoverageAgent` class) - Per-test coverage via HTTP endpoints (`/test/start`, `/test/end`)
+
+**Key classes:**
+- `AgentOptions` - Central configuration holder
+- `JacocoRuntimeController` - Interface to JaCoCo's execution data
+- `LenientCoverageTransformer` - Bytecode instrumentation with error recovery
+- `IUploader` - Interface for upload backends (Teamscale, Azure, Artifactory, disk)
+
+### System Tests
+
+The `system-tests/` directory contains integration tests that exercise the packaged agent JAR in various scenarios. Each subdirectory is a separate Gradle subproject.
+
+## Pre-Commit Checklist
+
+Before completing any code change, verify:
+
+- [ ] CHANGELOG.md updated for user-visible changes (bug fixes, new features, breaking changes)
+- [ ] Tests added/updated for the change
+- [ ] No unintended files modified

common-system-test/src/main/kotlin/com/teamscale/test/commons/Session.kt

@@ -25,6 +25,9 @@ class Session(request: Request) {
 
 	private val reports = mutableMapOf<EReportFormat, MutableList<ExternalReport>>()
 
+	/** Returns the revision for which the session was opened. */
+	fun getRevision() = revision
+
 	/**
 	 * Retrieves the commit information for the session. Combines the revision and commit data into a single string
 	 * representation separated by a comma.

system-tests/maven-external-upload-test/auto-resolve-revision-project/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,18 @@
+# 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.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar