Non daemon option, fixes #43

client/src/main/java/org/jboss/fuse/mvnd/client/DaemonConnector.java

@@ -27,8 +27,10 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.Properties;
 import java.util.UUID;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
 import java.util.stream.Collectors;
 import org.jboss.fuse.mvnd.common.BuildProperties;
 import org.jboss.fuse.mvnd.common.DaemonCompatibilitySpec;
@@ -84,6 +86,10 @@ public DaemonClientConnection maybeConnect(DaemonInfo daemon) {
     }
 
     public DaemonClientConnection connect(ClientOutput output) {
+        if (parameters.noDaemon()) {
+            return connectNoDaemon();
+        }
+
         final DaemonCompatibilitySpec constraint = new DaemonCompatibilitySpec(
                 parameters.javaHome(), parameters.getDaemonOpts());
         output.accept(Message.buildStatus("Looking up daemon..."));
@@ -110,6 +116,49 @@ public DaemonClientConnection connect(ClientOutput output) {
         return startDaemon();
     }
 
+    private DaemonClientConnection connectNoDaemon() {
+        if (Environment.isNative()) {
+            throw new UnsupportedOperationException(
+                    "The " + Environment.MVND_NO_DAEMON.getProperty() + " property is not supported in native mode.");
+        }
+        String daemon = ProcessHandle.current().pid() + "-" + System.currentTimeMillis();
+        Properties properties = new Properties();
+        properties.put(Environment.JAVA_HOME.getProperty(), parameters.javaHome().toString());
+        properties.put(Environment.USER_DIR.getProperty(), parameters.userDir().toString());
+        properties.put(Environment.USER_HOME.getProperty(), parameters.userHome().toString());
+        properties.put(Environment.MVND_HOME.getProperty(), parameters.mvndHome().toString());
+        properties.put(Environment.DAEMON_UID.getProperty(), daemon);
+        properties.put(Environment.MVND_DAEMON_STORAGE.getProperty(), parameters.daemonStorage().toString());
+        properties.put(Environment.DAEMON_REGISTRY.getProperty(), parameters.registry().toString());
+        properties.putAll(parameters.getDaemonOptsMap());
+        Environment.setProperties(properties);
+        AtomicReference<Throwable> throwable = new AtomicReference<>();
+        Thread serverThread = new Thread(() -> {
+            try {
+                Class<?> clazz = getClass().getClassLoader().loadClass("org.jboss.fuse.mvnd.daemon.Server");
+                try (AutoCloseable server = (AutoCloseable) clazz.getConstructor().newInstance()) {
+                    ((Runnable) server).run();
+                }
+            } catch (Throwable t) {
+                throwable.set(t);
+            }
+        });
+        serverThread.start();
+        long start = System.currentTimeMillis();
+        do {
+            DaemonClientConnection daemonConnection = connectToDaemonWithId(daemon, true);
+            if (daemonConnection != null) {
+                return daemonConnection;
+            }
+            try {
+                sleep(50L);
+            } catch (InterruptedException e) {
+                throw new DaemonException.InterruptedException(e);
+            }
+        } while (serverThread.isAlive() && System.currentTimeMillis() - start < DEFAULT_CONNECT_TIMEOUT);
+        throw new RuntimeException("Unable to connect to internal daemon", throwable.get());
+    }
+
     private String handleStopEvents(Collection<DaemonInfo> idleDaemons, Collection<DaemonInfo> busyDaemons) {
         final List<DaemonStopEvent> stopEvents = registry.getStopEvents();
 

client/src/main/java/org/jboss/fuse/mvnd/client/DaemonParameters.java

@@ -73,6 +73,13 @@ public List<String> getDaemonOpts() {
                 .collect(Collectors.toList());
     }
 
+    public Map<String, String> getDaemonOptsMap() {
+        return Arrays.stream(Environment.values())
+                .filter(Environment::isDiscriminating)
+                .collect(Collectors.toMap(Environment::getProperty,
+                        v -> property(v).orFail().asString()));
+    }
+
     public List<String> getDaemonCommandLineProperties() {
         return Arrays.stream(Environment.values())
                 .filter(Environment::isDiscriminating)
@@ -239,6 +246,17 @@ public Path mavenRepoLocal() {
         return property(Environment.MAVEN_REPO_LOCAL).asPath();
     }
 
+    /**
+     * @return <code>true</code> if maven should be executed within this process instead of spawning a daemon.
+     */
+    public boolean noDaemon() {
+        return value(Environment.MVND_NO_DAEMON)
+                .orSystemProperty()
+                .orEnvironmentVariable()
+                .orDefault()
+                .asBoolean();
+    }
+
     /**
      * @param  newUserDir where to change the current directory to
      * @return            a new {@link DaemonParameters} with {@code userDir} set to the given {@code newUserDir}

common/src/main/java/org/jboss/fuse/mvnd/common/Environment.java

@@ -68,6 +68,7 @@ public String asCommandLineProperty(String value) {
      * The path to the daemon registry
      */
     DAEMON_REGISTRY("daemon.registry", null, null, false),
+    MVND_NO_DAEMON("mvnd.noDaemon", "MVND_NO_DAEMON", "false", true),
     DAEMON_DEBUG("daemon.debug", null, false, true),
     DAEMON_IDLE_TIMEOUT_MS("daemon.idleTimeoutMs", null, TimeUnit.HOURS.toMillis(3), true),
     DAEMON_KEEP_ALIVE_MS("daemon.keepAliveMs", null, TimeUnit.SECONDS.toMillis(1), true),

daemon/src/main/java/org/jboss/fuse/mvnd/daemon/Server.java

@@ -72,6 +72,7 @@ public class Server implements AutoCloseable, Runnable {
     public static final int CANCEL_TIMEOUT = 10 * 1000;
 
     private final String uid;
+    private final boolean noDaemon;
     private final ServerSocketChannel socket;
     private final DaemonMavenCli cli;
     private volatile DaemonInfo info;
@@ -86,6 +87,7 @@ public class Server implements AutoCloseable, Runnable {
 
     public Server() throws IOException {
         this.uid = Environment.DAEMON_UID.asString();
+        this.noDaemon = Environment.MVND_NO_DAEMON.asBoolean();
         try {
             cli = new DaemonMavenCli();
             registry = new DaemonRegistry(Environment.DAEMON_REGISTRY.asPath());
@@ -136,8 +138,10 @@ public void close() {
                         try {
                             socket.close();
                         } finally {
-                            clearCache("sun.net.www.protocol.jar.JarFileFactory", "urlCache");
-                            clearCache("sun.net.www.protocol.jar.JarFileFactory", "fileCache");
+                            if (!noDaemon) {
+                                clearCache("sun.net.www.protocol.jar.JarFileFactory", "urlCache");
+                                clearCache("sun.net.www.protocol.jar.JarFileFactory", "fileCache");
+                            }
                         }
                     }
                 }
@@ -165,8 +169,14 @@ public void run() {
             executor.scheduleAtFixedRate(this::expirationCheck,
                     expirationCheckDelayMs, expirationCheckDelayMs, TimeUnit.MILLISECONDS);
             LOGGER.info("Daemon started");
-            new DaemonThread(this::accept).start();
-            awaitStop();
+            if (noDaemon) {
+                try (SocketChannel socket = this.socket.accept()) {
+                    client(socket);
+                }
+            } else {
+                new DaemonThread(this::accept).start();
+                awaitStop();
+            }
         } catch (Throwable t) {
             LOGGER.error("Error running daemon loop", t);
         } finally {
@@ -516,9 +526,11 @@ public <T extends Message> T request(Message request, Class<T> responseType, Pre
         } catch (Throwable t) {
             LOGGER.error("Error while building project", t);
         } finally {
-            LOGGER.info("Daemon back to idle");
-            updateState(DaemonState.Idle);
-            System.gc();
+            if (!noDaemon) {
+                LOGGER.info("Daemon back to idle");
+                updateState(DaemonState.Idle);
+                System.gc();
+            }
         }
     }
 

dist/src/main/distro/bin/mvnd.cmd

@@ -0,0 +1,206 @@
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+
+@REM -----------------------------------------------------------------------------
+@REM Apache Maven Startup Script
+@REM
+@REM Environment Variable Prerequisites
+@REM
+@REM   JAVA_HOME          Must point at your Java Development Kit installation.
+@REM   MAVEN_BATCH_ECHO  (Optional) Set to 'on' to enable the echoing of the batch commands.
+@REM   MAVEN_BATCH_PAUSE (Optional) set to 'on' to wait for a key stroke before ending.
+@REM   MAVEN_OPTS        (Optional) Java runtime options used when Maven is executed.
+@REM   MAVEN_SKIP_RC     (Optional) Flag to disable loading of mavenrc files.
+@REM -----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%"=="on" echo %MAVEN_BATCH_ECHO%
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat"
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%"=="" goto OkJHome
+for %%i in (java.exe) do set "JAVACMD=%%~$PATH:i"
+goto checkJCmd
+
+:OkJHome
+set "JAVACMD=%JAVA_HOME%\bin\java.exe"
+
+:checkJCmd
+if exist "%JAVACMD%" goto chkMHome
+
+echo The JAVA_HOME environment variable is not defined correctly >&2
+echo This environment variable is needed to run this program >&2
+echo NB: JAVA_HOME should point to a JDK not a JRE >&2
+goto error
+
+:chkMHome
+set "MVND_HOME=%~dp0.."
+if not "%MVND_HOME%"=="" goto stripMHome
+goto error
+
+:stripMHome
+if not "_%MVND_HOME:~-1%"=="_\" goto checkMCmd
+set "MVND_HOME=%MVND_HOME:~0,-1%"
+goto stripMHome
+
+:checkMCmd
+if exist "%MVND_HOME%\bin\mvnd.cmd" goto init
+goto error
+@REM ==== END VALIDATION ====
+
+:init
+
+set MAVEN_CMD_LINE_ARGS=%*
+
+@REM Find the project basedir, i.e., the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set "MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%"
+if not "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set "EXEC_DIR=%CD%"
+set "WDIR=%EXEC_DIR%"
+
+@REM Look for the --file switch and start the search for the .mvn directory from the specified
+@REM POM location, if supplied.
+
+set FILE_ARG=
+:arg_loop
+if "%~1" == "-f" (
+  set "FILE_ARG=%~2"
+  shift
+  goto process_file_arg
+)
+if "%~1" == "--file" (
+  set "FILE_ARG=%~2"
+  shift
+  goto process_file_arg
+)
+@REM If none of the above, skip the argument
+shift
+if not "%~1" == "" (
+  goto arg_loop
+) else (
+  goto findBaseDir
+)
+
+:process_file_arg
+if "%FILE_ARG%" == "" (
+  goto findBaseDir
+)
+if not exist "%FILE_ARG%" (
+  echo POM file "%FILE_ARG%" specified the -f/--file command-line argument does not exist >&2
+  goto error
+)
+if exist "%FILE_ARG%\*" (
+  set "POM_DIR=%FILE_ARG%"
+) else (
+  call :get_directory_from_file "%FILE_ARG%"
+)
+if not exist "%POM_DIR%" (
+  echo Directory "%POM_DIR%" extracted from the -f/--file command-line argument "%FILE_ARG%" does not exist >&2
+  goto error
+)
+set "WDIR=%POM_DIR%"
+goto findBaseDir
+
+:get_directory_from_file
+set "POM_DIR=%~dp1"
+:stripPomDir
+if not "_%POM_DIR:~-1%"=="_\" goto pomDirStripped
+set "POM_DIR=%POM_DIR:~0,-1%"
+goto stripPomDir
+:pomDirStripped
+exit /b
+
+:findBaseDir
+cd /d "%WDIR%"
+:findBaseDirLoop
+if exist "%WDIR%\.mvn" goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set "WDIR=%CD%"
+goto findBaseDirLoop
+
+:baseDirFound
+set "MAVEN_PROJECTBASEDIR=%WDIR%"
+cd /d "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+if "_%EXEC_DIR:~-1%"=="_\" set "EXEC_DIR=%EXEC_DIR:~0,-1%"
+set "MAVEN_PROJECTBASEDIR=%EXEC_DIR%"
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+set "jvmConfig=\.mvn\jvm.config"
+if not exist "%MAVEN_PROJECTBASEDIR%%jvmConfig%" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+for %%i in ("%MVND_HOME%"\boot\*.jar "%MVND_HOME%"\lib\ext\*.jar "%MVND_HOME%"\lib\*.jar) do set DAEMON_JAR="%%i"
+set DAEMON_LAUNCHER=org.jboss.fuse.mvnd.client.DefaultClient
+
+"%JAVACMD%" ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %DAEMON_JAR% ^
+  "-Dlogback.configurationFile=%MVND_HOME%\conf\logging\logback.xml" ^
+  "-Dmvnd.home=%MAVEN_HOME%" ^
+  "-Dmaven.home=%MAVEN_HOME%" ^
+  "-Dlibrary.jansi.path=%MAVEN_HOME%\lib\jansi-native" ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %DAEMON_LAUNCHER% %MAVEN_CMD_LINE_ARGS%
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

dist/src/main/distro/bin/mvnd.sh

@@ -102,7 +102,7 @@ if [ ! -x "$JAVACMD" ] ; then
   exit 1
 fi
 
-DAEMON_JAR=`echo "${MVND_HOME}"/mvn/lib/ext/*.jar "${MVND_HOME}"/mvn/lib/*.jar`
+DAEMON_JAR=`echo "${MVND_HOME}"/mvn/boot/*.jar "${MVND_HOME}"/mvn/lib/ext/*.jar "${MVND_HOME}"/mvn/lib/*.jar`
 DAEMON_JAR=$(echo $DAEMON_JAR | sed -e 's/ /:/g')
 DAEMON_LAUNCHER=org.jboss.fuse.mvnd.client.DefaultClient