detect cs

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@549684 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/util/FileUtils.java

@@ -15,7 +15,6 @@
  *  limitations under the License.
  *
  */
-
 package org.apache.tools.ant.util;
 
 import java.io.File;
@@ -62,10 +61,13 @@ public class FileUtils {
     private static Random rand = new Random(System.currentTimeMillis()
             + Runtime.getRuntime().freeMemory());
 
-    private static boolean onNetWare = Os.isFamily("netware");
-    private static boolean onDos = Os.isFamily("dos");
-    private static boolean onWin9x = Os.isFamily("win9x");
-    private static boolean onWindows = Os.isFamily("windows");
+    private static final boolean onNetWare = Os.isFamily("netware");
+    private static final boolean onDos = Os.isFamily("dos");
+    private static final boolean onWin9x = Os.isFamily("win9x");
+    private static final boolean onWindows = Os.isFamily("windows");
+    private static final boolean onMac = Os.isFamily("mac");
+
+    private static boolean caseSensitiveFileSystem;
 
     static final int BUF_SIZE = 8192;
 
@@ -87,6 +89,23 @@ public class FileUtils {
      */
     public static final long NTFS_FILE_TIMESTAMP_GRANULARITY = 1;
 
+    static {
+        try {
+	    File tmpdir = new File(System.getProperty("java.io.tmpdir"));
+            final String filename = "ant-casesensitivity.tst";
+            new File(tmpdir, filename).createNewFile();
+            new File(tmpdir, filename.toUpperCase()).createNewFile();
+            String[] files = tmpdir.list(new FilenameFilter() {
+                public boolean accept(File dir, String name) {
+                    return filename.equalsIgnoreCase(name);
+                }
+            });
+            caseSensitiveFileSystem = files.length == 2;
+        } catch (IOException e) {
+            //default as well as possible:
+            caseSensitiveFileSystem = !onWin9x && !onWindows && !onDos && !onMac;
+        }
+    }
 
     /**
      * A one item cache for fromUri.
@@ -1181,8 +1200,9 @@ public class FileUtils {
      * @since Ant 1.5.3
      */
     public boolean fileNameEquals(File f1, File f2) {
-        return normalize(f1.getAbsolutePath())
-            .equals(normalize(f2.getAbsolutePath()));
+        String name1 = normalize(f1.getAbsolutePath()).getAbsolutePath();
+        String name2 = normalize(f2.getAbsolutePath()).getAbsolutePath();
+        return caseSensitiveFileSystem ? name1.equals(name2) : name1.equalsIgnoreCase(name2);
     }
 
     /**