Monkey with process forking for Windoze

There were several problems to fix. 1) a bug in the
JDK (1.7 up to 7_60):

https://bugs.openjdk.java.net/browse/JDK-8023130

which we can work around by detecting buggy VMs and not trying
to use inheritIO. 2) File<->URL conversion is platform dependent
and we shouldn't make any assumptions. The problem in this case
was that file URLs contain a ":" so they can 't be added to a
path in UNIX, but on Windows you need the absolute path with the
colon. Solution: use Files on the classpath for spring-boot:run.

Hopefully also fixes gh-767

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/RunProcess.java

@@ -76,6 +76,9 @@ public class RunProcess {
 	}
 
 	private boolean inheritIO(ProcessBuilder builder) {
+		if (isInheritIOBroken()) {
+			return false;
+		}
 		try {
 			INHERIT_IO_METHOD.invoke(builder);
 			return true;
@@ -85,6 +88,32 @@ public class RunProcess {
 		}
 	}
 
+	// There's a bug in the Windows VM (https://bugs.openjdk.java.net/browse/JDK-8023130)
+	// that means we need to avoid inheritIO
+	private static boolean isInheritIOBroken() {
+		if (!System.getProperty("os.name", "none").toLowerCase().contains("windows")) {
+			return false;
+		}
+		String runtime = System.getProperty("java.runtime.version");
+		if (!runtime.startsWith("1.7")) {
+			return false;
+		}
+		String[] tokens = runtime.split("_");
+		if (tokens.length < 2) {
+			return true; // No idea actually, shouldn't happen
+		}
+		try {
+			Integer build = Integer.valueOf(tokens[1].split("[^0-9]")[0]);
+			if (build < 60) {
+				return true;
+			}
+		}
+		catch (Exception e) {
+			return true;
+		}
+		return false;
+	}
+
 	private void redirectOutput(Process process) {
 		final BufferedReader reader = new BufferedReader(new InputStreamReader(
 				process.getInputStream()));
@@ -96,6 +125,7 @@ public class RunProcess {
 					while (line != null) {
 						System.out.println(line);
 						line = reader.readLine();
+						System.out.flush();
 					}
 					reader.close();
 				}

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/RunMojo.java

@@ -160,8 +160,9 @@ public class RunMojo extends AbstractMojo {
 			StringBuilder classpath = new StringBuilder();
 			for (URL ele : getClassPathUrls()) {
 				classpath = classpath.append((classpath.length() > 0 ? File.pathSeparator
-						: "") + ele);
+						: "") + new File(ele.toURI()));
 			}
+			getLog().debug("Classpath for forked process: " + classpath);
 			args.add("-cp");
 			args.add(classpath.toString());
 		}