1 files changed, 170 insertions, 0 deletions
diff --git a/gerrit-util-cli/src/main/java/com/google/gerrit/util/cli/CmdLineParser.java b/gerrit-util-cli/src/main/java/com/google/gerrit/util/cli/CmdLineParser.java
new file mode 100644
index 0000000000..f83d852c26
--- /dev/null
+++ b/gerrit-util-cli/src/main/java/com/google/gerrit/util/cli/CmdLineParser.java
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
+ *
+ * (Taken from JGit org.eclipse.jgit.pgm.opt.CmdLineParser.)
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the Git Development Community nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.google.gerrit.util.cli;
+
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import com.google.inject.Key;
+import com.google.inject.assistedinject.Assisted;
+
+import org.kohsuke.args4j.Argument;
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.IllegalAnnotationError;
+import org.kohsuke.args4j.Option;
+import org.kohsuke.args4j.OptionDef;
+import org.kohsuke.args4j.spi.OptionHandler;
+import org.kohsuke.args4j.spi.Setter;
+
+import java.io.Writer;
+import java.util.ArrayList;
+import java.util.ResourceBundle;
+
+/**
+ * Extended command line parser which handles --foo=value arguments.
+ * <p>
+ * The args4j package does not natively handle --foo=value and instead prefers
+ * to see --foo value on the command line. Many users are used to the GNU style
+ * --foo=value long option, so we convert from the GNU style format to the
+ * args4j style format prior to invoking args4j for parsing.
+ */
+public class CmdLineParser {
+  public interface Factory {
+    CmdLineParser create(Object bean);
+  }
+
+  private final Injector injector;
+  private final MyParser parser;
+
+  /**
+   * Creates a new command line owner that parses arguments/options and set them
+   * into the given object.
+   *
+   * @param bean instance of a class annotated by
+   *        {@link org.kohsuke.args4j.Option} and
+   *        {@link org.kohsuke.args4j.Argument}. this object will receive
+   *        values.
+   *
+   * @throws IllegalAnnotationError if the option bean class is using args4j
+   *         annotations incorrectly.
+   */
+  @Inject
+  public CmdLineParser(final Injector injector, @Assisted final Object bean)
+      throws IllegalAnnotationError {
+    this.injector = injector;
+    this.parser = new MyParser(bean);
+  }
+
+  public void addArgument(Setter<?> setter, Argument a) {
+    parser.addArgument(setter, a);
+  }
+
+  public void addOption(Setter<?> setter, Option o) {
+    parser.addOption(setter, o);
+  }
+
+  public void printSingleLineUsage(Writer w, ResourceBundle rb) {
+    parser.printSingleLineUsage(w, rb);
+  }
+
+  public void printUsage(Writer out, ResourceBundle rb) {
+    parser.printUsage(out, rb);
+  }
+
+  public void parseArgument(final String... args) throws CmdLineException {
+    final ArrayList<String> tmp = new ArrayList<String>(args.length);
+    for (int argi = 0; argi < args.length; argi++) {
+      final String str = args[argi];
+      if (str.equals("--")) {
+        while (argi < args.length)
+          tmp.add(args[argi++]);
+        break;
+      }
+
+      if (str.startsWith("--")) {
+        final int eq = str.indexOf('=');
+        if (eq > 0) {
+          tmp.add(str.substring(0, eq));
+          tmp.add(str.substring(eq + 1));
+          continue;
+        }
+      }
+
+      tmp.add(str);
+    }
+
+    parser.parseArgument(tmp.toArray(new String[tmp.size()]));
+  }
+
+  private class MyParser extends org.kohsuke.args4j.CmdLineParser {
+    MyParser(final Object bean) {
+      super(bean);
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    protected OptionHandler createOptionHandler(final OptionDef option,
+        final Setter setter) {
+      if (isHandlerSpecified(option) || isEnum(setter) || isPrimitive(setter)) {
+        return super.createOptionHandler(option, setter);
+      }
+
+      final Key<OptionHandlerFactory<?>> key =
+          OptionHandlerUtil.keyFor(setter.getType());
+      Injector i = injector;
+      while (i != null) {
+        if (i.getBindings().containsKey(key)) {
+          return i.getInstance(key).create(this, option, setter);
+        }
+        i = i.getParent();
+      }
+
+      return super.createOptionHandler(option, setter);
+    }
+
+    private boolean isHandlerSpecified(final OptionDef option) {
+      return option.handler() != OptionHandler.class;
+    }
+
+    @SuppressWarnings("unchecked")
+    private boolean isEnum(final Setter setter) {
+      return Enum.class.isAssignableFrom(setter.getType());
+    }
+
+    @SuppressWarnings("unchecked")
+    private boolean isPrimitive(final Setter setter) {
+      return setter.getType().isPrimitive();
+    }
+  }
+}