Move createSymLink/readSymLink to FileUtils

Bug: 475070
Change-Id: I258f4bf291e02ef8e6f867b5d71c04ec902b6bcb
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>

org.eclipse.jgit/.settings/.api_filters

@@ -21,4 +21,18 @@
             </message_arguments>
         </filter>
     </resource>
+    <resource path="src/org/eclipse/jgit/util/FileUtil.java" type="org.eclipse.jgit.util.FileUtil">
+        <filter id="338792546">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.util.FileUtil"/>
+                <message_argument value="createSymLink(File, String)"/>
+            </message_arguments>
+        </filter>
+        <filter id="338792546">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.util.FileUtil"/>
+                <message_argument value="readSymlink(File)"/>
+            </message_arguments>
+        </filter>
+    </resource>
 </component>

org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties

@@ -241,7 +241,6 @@ errorInvalidProtocolWantedOldNewRef=error: invalid protocol: wanted 'old new ref
 errorListing=Error listing {0}
 errorOccurredDuringUnpackingOnTheRemoteEnd=error occurred during unpacking on the remote end: {0}
 errorReadingInfoRefs=error reading info/refs
-errorSymlinksNotSupported=Symlinks are not supported with this OS/JRE
 exceptionCaughtDuringExecutionOfHook=Exception caught during execution of "{0}" hook.
 exceptionCaughtDuringExecutionOfAddCommand=Exception caught during execution of add command
 exceptionCaughtDuringExecutionOfArchiveCommand=Exception caught during execution of archive command
@@ -465,7 +464,7 @@ peeledLineBeforeRef=Peeled line before ref.
 peerDidNotSupplyACompleteObjectGraph=peer did not supply a complete object graph
 personIdentEmailNonNull=E-mail address of PersonIdent must not be null.
 personIdentNameNonNull=Name of PersonIdent must not be null.
-prefixRemote=remote: 
+prefixRemote=remote:
 problemWithResolvingPushRefSpecsLocally=Problem with resolving push ref specs locally: {0}
 progressMonUploading=Uploading {0}
 propertyIsAlreadyNonNull=Property is already non null

org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java

@@ -300,7 +300,6 @@ public class JGitText extends TranslationBundle {
 	/***/ public String errorListing;
 	/***/ public String errorOccurredDuringUnpackingOnTheRemoteEnd;
 	/***/ public String errorReadingInfoRefs;
-	/***/ public String errorSymlinksNotSupported;
 	/***/ public String exceptionCaughtDuringExecutionOfHook;
 	/***/ public String exceptionCaughtDuringExecutionOfAddCommand;
 	/***/ public String exceptionCaughtDuringExecutionOfArchiveCommand;

org.eclipse.jgit/src/org/eclipse/jgit/util/FS.java

@@ -67,7 +67,6 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import org.eclipse.jgit.api.errors.JGitInternalException;
-import org.eclipse.jgit.errors.SymlinksNotSupportedException;
 import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.Repository;
@@ -623,8 +622,7 @@ public abstract class FS {
 	 * @since 3.0
 	 */
 	public String readSymLink(File path) throws IOException {
-		throw new SymlinksNotSupportedException(
-				JGitText.get().errorSymlinksNotSupported);
+		return FileUtils.readSymLink(path);
 	}
 
 	/**
@@ -707,8 +705,7 @@ public abstract class FS {
 	 * @since 3.0
 	 */
 	public void createSymLink(File path, String target) throws IOException {
-		throw new SymlinksNotSupportedException(
-				JGitText.get().errorSymlinksNotSupported);
+		FileUtils.createSymLink(path, target);
 	}
 
 	/**

org.eclipse.jgit/src/org/eclipse/jgit/util/FS_POSIX.java

@@ -295,16 +295,6 @@ public class FS_POSIX extends FS {
 		// no action on POSIX
 	}
 
-	@Override
-	public String readSymLink(File path) throws IOException {
-		return FileUtil.readSymlink(path);
-	}
-
-	@Override
-	public void createSymLink(File path, String target) throws IOException {
-		FileUtil.createSymLink(path, target);
-	}
-
 	/**
 	 * @since 3.3
 	 */

org.eclipse.jgit/src/org/eclipse/jgit/util/FS_Win32.java

@@ -168,7 +168,7 @@ public class FS_Win32 extends FS {
 		try {
 			tempFile = File.createTempFile("tempsymlinktarget", ""); //$NON-NLS-1$ //$NON-NLS-2$
 			File linkName = new File(tempFile.getParentFile(), "tempsymlink"); //$NON-NLS-1$
-			FileUtil.createSymLink(linkName, tempFile.getPath());
+			createSymLink(linkName, tempFile.getPath());
 			supportSymlinks = Boolean.TRUE;
 			linkName.delete();
 		} catch (IOException | UnsupportedOperationException e) {
@@ -233,16 +233,6 @@ public class FS_Win32 extends FS {
 		FileUtil.setHidden(path, hidden);
 	}
 
-	@Override
-	public String readSymLink(File path) throws IOException {
-		return FileUtil.readSymlink(path);
-	}
-
-	@Override
-	public void createSymLink(File path, String target) throws IOException {
-		FileUtil.createSymLink(path, target);
-	}
-
 	/**
 	 * @since 3.3
 	 */

org.eclipse.jgit/src/org/eclipse/jgit/util/FS_Win32_Cygwin.java

@@ -218,16 +218,6 @@ public class FS_Win32_Cygwin extends FS_Win32 {
 		FileUtil.setHidden(path, hidden);
 	}
 
-	@Override
-	public String readSymLink(File path) throws IOException {
-		return FileUtil.readSymlink(path);
-	}
-
-	@Override
-	public void createSymLink(File path, String target) throws IOException {
-		FileUtil.createSymLink(path, target);
-	}
-
 	/**
 	 * @since 3.3
 	 */

org.eclipse.jgit/src/org/eclipse/jgit/util/FileUtil.java

@@ -55,7 +55,6 @@ import java.nio.file.attribute.PosixFileAttributeView;
 import java.nio.file.attribute.PosixFileAttributes;
 import java.nio.file.attribute.PosixFilePermission;
 import java.text.Normalizer;
-import java.text.Normalizer.Form;
 
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.util.FS.Attributes;
@@ -65,40 +64,6 @@ import org.eclipse.jgit.util.FS.Attributes;
  */
 public class FileUtil {
 
-	/**
-	 * @param path
-	 * @return target path of the symlink
-	 * @throws IOException
-	 */
-	public static String readSymlink(File path) throws IOException {
-		Path nioPath = path.toPath();
-		Path target = Files.readSymbolicLink(nioPath);
-		String targetString = target.toString();
-		if (SystemReader.getInstance().isWindows())
-			targetString = targetString.replace('\\', '/');
-		else if (SystemReader.getInstance().isMacOS())
-			targetString = Normalizer.normalize(targetString, Form.NFC);
-		return targetString;
-	}
-
-	/**
-	 * @param path
-	 *            path of the symlink to be created
-	 * @param target
-	 *            target of the symlink to be created
-	 * @throws IOException
-	 */
-	public static void createSymLink(File path, String target)
-			throws IOException {
-		Path nioPath = path.toPath();
-		if (Files.exists(nioPath, LinkOption.NOFOLLOW_LINKS))
-			Files.delete(nioPath);
-		if (SystemReader.getInstance().isWindows())
-			target = target.replace('/', '\\');
-		Path nioTarget = new File(target).toPath();
-		Files.createSymbolicLink(nioPath, nioTarget);
-	}
-
 	/**
 	 * @param path
 	 * @return {@code true} if the passed path is a symlink

org.eclipse.jgit/src/org/eclipse/jgit/util/FileUtils.java

@@ -48,7 +48,12 @@ package org.eclipse.jgit.util;
 import java.io.File;
 import java.io.IOException;
 import java.nio.channels.FileLock;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
 import java.text.MessageFormat;
+import java.text.Normalizer;
+import java.text.Normalizer.Form;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Pattern;
@@ -350,18 +355,33 @@ public class FileUtils {
 	 */
 	public static void createSymLink(File path, String target)
 			throws IOException {
-		FS.DETECTED.createSymLink(path, target);
+		Path nioPath = path.toPath();
+		if (Files.exists(nioPath, LinkOption.NOFOLLOW_LINKS)) {
+			Files.delete(nioPath);
+		}
+		if (SystemReader.getInstance().isWindows()) {
+			target = target.replace('/', '\\');
+		}
+		Path nioTarget = new File(target).toPath();
+		Files.createSymbolicLink(nioPath, nioTarget);
 	}
 
 	/**
 	 * @param path
-	 * @return the target of the symbolic link, or null if it is not a symbolic
-	 *         link
+	 * @return target path of the symlink, or null if it is not a symbolic link
 	 * @throws IOException
 	 * @since 3.0
 	 */
 	public static String readSymLink(File path) throws IOException {
-		return FS.DETECTED.readSymLink(path);
+		Path nioPath = path.toPath();
+		Path target = Files.readSymbolicLink(nioPath);
+		String targetString = target.toString();
+		if (SystemReader.getInstance().isWindows()) {
+			targetString = targetString.replace('\\', '/');
+		} else if (SystemReader.getInstance().isMacOS()) {
+			targetString = Normalizer.normalize(targetString, Form.NFC);
+		}
+		return targetString;
 	}
 
 	/**