[gh-11363] Compile parser to temp directory with MAVEN_HOME-based path

- Compile JvmConfigParser.java to %TEMP%\mvn-jvm-parser-<hash>
- Hash is based on MAVEN_HOME to ensure different Maven versions use different compiled classes
- Avoids needing write access to Maven bin directory
- Avoids single-file source execution issues with output redirection

Author: gnodet

apache-maven/src/assembly/maven/bin/mvn.cmd

@@ -181,9 +181,18 @@ if not exist "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadJvmConfig
 
 rem Use Java to parse jvm.config to avoid batch script parsing issues with special characters
 rem This handles pipes, quotes, and other special characters correctly
-rem Use single-file source-code execution (Java 11+) to avoid needing write access to bin directory
+rem Compile to temp directory to avoid needing write access to bin directory
+rem Use a hash of MAVEN_HOME to create a unique directory per Maven installation
+set "MAVEN_HOME_HASH=%MAVEN_HOME:\=-%"
+set "MAVEN_HOME_HASH=%MAVEN_HOME_HASH::=%"
+set "MAVEN_HOME_HASH=%MAVEN_HOME_HASH: =%"
+set "JVM_CONFIG_PARSER_DIR=%TEMP%\mvn-jvm-parser-%MAVEN_HOME_HASH%"
+if not exist "%JVM_CONFIG_PARSER_DIR%\JvmConfigParser.class" (
+    if not exist "%JVM_CONFIG_PARSER_DIR%" mkdir "%JVM_CONFIG_PARSER_DIR%"
+    "%JAVACMD:java.exe=javac.exe%" -d "%JVM_CONFIG_PARSER_DIR%" "%MAVEN_HOME%\bin\JvmConfigParser.java" >nul 2>&1
+)
 set "JVM_CONFIG_TEMP=%TEMP%\mvn-jvm-config-%RANDOM%.txt"
-"%JAVACMD%" "%MAVEN_HOME%\bin\JvmConfigParser.java" "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" "%MAVEN_PROJECTBASEDIR%" > "%JVM_CONFIG_TEMP%" 2>nul
+"%JAVACMD%" -cp "%JVM_CONFIG_PARSER_DIR%" JvmConfigParser "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" "%MAVEN_PROJECTBASEDIR%" > "%JVM_CONFIG_TEMP%" 2>nul
 rem Read the single line from temp file
 set /p JVM_CONFIG_MAVEN_OPTS=<"%JVM_CONFIG_TEMP%"
 del "%JVM_CONFIG_TEMP%" 2>nul