Improve logging for IO utils and add thread info in build logs

* Add additional logging on IO utils methods to detect
potential issues with concurrent build steps.
* Print thread information for DEBUG or TRACE log messages
in build logs.

devtools/maven/src/main/java/io/quarkus/maven/MojoLogger.java

@@ -91,7 +91,12 @@ public boolean isEnabled(final Level level) {
             void doActualLog(final Log log, final Level level, final String message, final Throwable thrown) {
                 final MessageBuilder buffer = MessageUtils.buffer();
                 // style options are limited unless we crack into jansi ourselves
-                buffer.strong("[").project(name).strong("]").a(" ").a(message);
+                if (Level.DEBUG.compareTo(level) <= 0) {
+                    buffer.strong("[").project(name).strong("]").a(" ").a("(").a(Thread.currentThread().getName()).a(")").a(" ")
+                            .a(message);
+                } else {
+                    buffer.strong("[").project(name).strong("]").a(" ").a(message);
+                }
                 if (thrown != null) {
                     switch (level) {
                         case FATAL:

independent-projects/bootstrap/app-model/src/main/java/io/quarkus/bootstrap/util/IoUtils.java

@@ -21,6 +21,8 @@
 import java.util.Objects;
 import java.util.UUID;
 
+import org.jboss.logging.Logger;
+
 /**
  *
  * @author Alexey Loubyansky
@@ -31,6 +33,8 @@ public class IoUtils {
 
     private static final Path TMP_DIR = Paths.get(PropertyUtils.getProperty("java.io.tmpdir"));
 
+    private static final Logger log = Logger.getLogger(IoUtils.class);
+
     private static void failedToMkDir(final Path dir) {
         throw new IllegalStateException("Failed to create directory " + dir);
     }
@@ -57,6 +61,7 @@ public static Path mkdirs(Path dir) {
     }
 
     public static void recursiveDelete(Path root) {
+        log.debugf("Recursively delete directory %s", root);
         if (root == null || !Files.exists(root)) {
             return;
         }
@@ -68,6 +73,7 @@ public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
                     try {
                         Files.delete(file);
                     } catch (IOException ex) {
+                        log.debugf(ex, "Unable to delete file " + file);
                     }
                     return FileVisitResult.CONTINUE;
                 }
@@ -79,6 +85,7 @@ public FileVisitResult postVisitDirectory(Path dir, IOException e)
                         try {
                             Files.delete(dir);
                         } catch (IOException ex) {
+                            log.debugf(ex, "Unable to delete directory " + dir);
                         }
                         return FileVisitResult.CONTINUE;
                     } else {
@@ -88,6 +95,7 @@ public FileVisitResult postVisitDirectory(Path dir, IOException e)
                 }
             });
         } catch (IOException e) {
+            log.debugf(e, "Error recursively deleting directory");
         }
     }
 
@@ -98,19 +106,23 @@ public FileVisitResult postVisitDirectory(Path dir, IOException e)
      * @throws IOException in case of a failure
      */
     public static void createOrEmptyDir(Path dir) throws IOException {
+        log.debugf("Create or empty directory %s", dir);
         Objects.requireNonNull(dir);
         if (!Files.exists(dir)) {
+            log.debugf("Directory %s does not exist, create directories", dir);
             Files.createDirectories(dir);
             return;
         }
         if (!Files.isDirectory(dir)) {
             throw new IllegalArgumentException(dir + " is not a directory");
         }
+        log.debugf("Iterate over contents of %s to delete its contents", dir);
         try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
             for (Path p : stream) {
                 if (Files.isDirectory(p)) {
                     recursiveDelete(p);
                 } else {
+                    log.debugf("Delete file %s", p);
                     Files.delete(p);
                 }
             }