SONARPLUGINS-1376 Throw an exception with a meaningful message, when no files matching pattern

src/main/java/org/sonar/runner/Launcher.java

@@ -22,6 +22,7 @@ package org.sonar.runner;
 
 import java.io.File;
 import java.io.FileFilter;
+import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
 
@@ -96,7 +97,7 @@ public class Launcher {
       definition.addBinaryDir(dir);
     }
     for (String pattern : getList(properties, "libraries")) {
-      for (File file : getLibraries(pattern)) {
+      for (File file : getLibraries(baseDir, pattern)) {
         definition.addLibrary(file.getAbsolutePath());
       }
     }
@@ -107,18 +108,35 @@ public class Launcher {
    * Returns files matching specified pattern.
    * Visibility has been relaxed to make code testable.
    */
-  static File[] getLibraries(String pattern) {
+  static File[] getLibraries(File baseDir, String pattern) {
     final int i = Math.max(pattern.lastIndexOf('/'), pattern.lastIndexOf('\\'));
-    final String dir, filePattern;
+    final String dirPath, filePattern;
     if (i == -1) {
-      dir = ".";
+      dirPath = ".";
       filePattern = pattern;
     } else {
-      dir = pattern.substring(0, i);
+      dirPath = pattern.substring(0, i);
       filePattern = pattern.substring(i + 1);
     }
     FileFilter fileFilter = new AndFileFilter(FileFileFilter.FILE, new WildcardFileFilter(filePattern));
-    return new File(dir).listFiles(fileFilter);
+    File dir = resolvePath(baseDir, dirPath);
+    File[] files = dir.listFiles(fileFilter);
+    if (files == null || files.length == 0) {
+      throw new RunnerException("No files matching pattern \"" + filePattern + "\" in directory \"" + dir + "\"");
+    }
+    return files;
+  }
+
+  private static File resolvePath(File baseDir, String path) {
+    File file = new File(path);
+    if (!file.isAbsolute()) {
+      try {
+        file = new File(baseDir, path).getCanonicalFile();
+      } catch (IOException e) {
+        throw new RunnerException("Unable to resolve path \"" + path + "\"", e);
+      }
+    }
+    return file;
   }
 
   private String[] getList(Properties properties, String key) {

src/main/java/org/sonar/runner/Main.java

@@ -53,10 +53,12 @@ public final class Main {
           + ", vendor: " + System.getProperty("java.vendor", "<unknown vendor>"));
       log("OS name: \"" + System.getProperty("os.name") + "\", version: \"" + System.getProperty("os.version") + "\", arch: \"" + System.getProperty("os.arch") + "\"");
       log("Server: " + runner.getServerURL());
-      log("Work directory: " + runner.getWorkDir().getCanonicalPath());
+      try {
+        log("Work directory: " + runner.getWorkDir().getCanonicalPath());
+      } catch (IOException e) {
+        throw new RunnerException(e);
+      }
       runner.execute();
-    } catch (IOException e) {
-      throw new RunnerException(e);
     } finally {
       printStats(startTime);
     }

src/main/java/org/sonar/runner/RunnerException.java

@@ -19,6 +19,8 @@
  */
 package org.sonar.runner;
 
+import java.io.IOException;
+
 /**
  * @since 1.2
  */
@@ -32,4 +34,8 @@ public class RunnerException extends RuntimeException {
     super(cause);
   }
 
+  public RunnerException(String message, Throwable cause) {
+    super(message, cause);
+  }
+
 }

src/test/java/org/sonar/runner/LauncherTest.java

@@ -20,7 +20,9 @@
 package org.sonar.runner;
 
 import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.startsWith;
 import static org.junit.Assert.assertThat;
+import static org.junit.Assert.fail;
 
 import java.io.File;
 import org.junit.Test;
@@ -28,15 +30,30 @@ import org.junit.Test;
 public class LauncherTest {
 
   @Test
-  public void shouldNotFailWhenPathNotSpecified() {
-    Launcher.getLibraries("file.jar");
+  public void shouldFilterFiles() throws Exception {
+    File baseDir = new File(getClass().getResource("/org/sonar/runner/LauncherTest/shouldFilterFiles/").toURI());
+    assertThat(Launcher.getLibraries(baseDir, "in*.txt").length, is(1));
+    assertThat(Launcher.getLibraries(baseDir, "*.txt").length, is(2));
+    assertThat(Launcher.getLibraries(baseDir.getParentFile(), "shouldFilterFiles/in*.txt").length, is(1));
+    assertThat(Launcher.getLibraries(baseDir.getParentFile(), "shouldFilterFiles/*.txt").length, is(2));
   }
 
   @Test
-  public void shouldFilterFiles() throws Exception {
-    File dir = new File(getClass().getResource("/org/sonar/runner/LauncherTest/shouldFilterFiles/").toURI());
-    assertThat(Launcher.getLibraries(dir.getAbsolutePath() + "/in*.txt").length, is(1));
-    assertThat(Launcher.getLibraries(dir.getAbsolutePath() + "/*.txt").length, is(2));
+  public void shouldWorkWithAbsolutePath() throws Exception {
+    File baseDir = new File("not-exists");
+    String absolutePattern = new File(getClass().getResource("/org/sonar/runner/LauncherTest/shouldFilterFiles/").toURI()).getAbsolutePath() + "/in*.txt";
+    assertThat(Launcher.getLibraries(baseDir.getParentFile(), absolutePattern).length, is(1));
+  }
+
+  @Test
+  public void shouldThrowExceptionWhenNoFilesMatchingPattern() throws Exception {
+    File baseDir = new File(getClass().getResource("/org/sonar/runner/LauncherTest/shouldFilterFiles/").toURI());
+    try {
+      Launcher.getLibraries(baseDir, "*/*.jar");
+      fail("Exception expected");
+    } catch (RunnerException e) {
+      assertThat(e.getMessage(), startsWith("No files matching pattern \"*.jar\" in directory "));
+    }
   }
 
 }

src/test/java/org/sonar/runner/RunnerTest.java

@@ -38,7 +38,7 @@ public class RunnerTest {
   public void shouldThrowExceptionIfMandatoryPropertyNotSpecified() {
     try {
       Runner.create(new Properties()).checkMandatoryProperties();
-      fail();
+      fail("Exception expected");
     } catch (RunnerException e) {
       assertThat(e.getMessage(), is("You must define mandatory properties: sonar.projectKey, sonar.projectName, sonar.projectVersion, sources"));
     }