com.google.gerrit.server.plugins.PluginUtil Maven / Gradle / Ivy
// Copyright (C) 2017 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.plugins;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Ordering;
import com.google.common.io.ByteStreams;
import com.google.gerrit.extensions.annotations.PluginName;
import com.google.gerrit.extensions.webui.JavaScriptPlugin;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
public class PluginUtil {
public static List listPlugins(Path pluginsDir, String suffix) throws IOException {
if (pluginsDir == null || !Files.exists(pluginsDir)) {
return ImmutableList.of();
}
DirectoryStream.Filter filter =
entry -> {
String n = entry.getFileName().toString();
boolean accept =
!n.startsWith(".last_") && !n.startsWith(".next_") && Files.isRegularFile(entry);
if (!Strings.isNullOrEmpty(suffix)) {
accept &= n.endsWith(suffix);
}
return accept;
};
try (DirectoryStream files = Files.newDirectoryStream(pluginsDir, filter)) {
return Ordering.natural().sortedCopy(files);
}
}
static List listPlugins(Path pluginsDir) throws IOException {
return listPlugins(pluginsDir, null);
}
static Path asTemp(InputStream in, String prefix, String suffix, Path dir) throws IOException {
if (!Files.exists(dir)) {
Files.createDirectories(dir);
}
Path tmp = Files.createTempFile(dir, prefix, suffix);
boolean keep = false;
try (OutputStream out = Files.newOutputStream(tmp)) {
ByteStreams.copy(in, out);
keep = true;
return tmp;
} finally {
if (!keep) {
Files.delete(tmp);
}
}
}
public static String nameOf(Path plugin) {
return nameOf(plugin.getFileName().toString());
}
static String nameOf(String name) {
if (name.endsWith(".disabled")) {
name = name.substring(0, name.lastIndexOf('.'));
}
int ext = name.lastIndexOf('.');
return 0 < ext ? name.substring(0, ext) : name;
}
static ClassLoader parentFor(Plugin.ApiType type) {
switch (type) {
case EXTENSION:
return PluginName.class.getClassLoader();
case PLUGIN:
return PluginLoader.class.getClassLoader();
case JS:
return JavaScriptPlugin.class.getClassLoader();
default:
throw new IllegalArgumentException("Unsupported ApiType " + type);
}
}
}