1 files changed, 132 insertions, 0 deletions
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/GerritSshApi.java b/src/main/java/com/googlesource/gerrit/plugins/replication/GerritSshApi.java
new file mode 100644
index 0000000..b46a0d9
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/GerritSshApi.java
@@ -0,0 +1,132 @@
+// 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.googlesource.gerrit.plugins.replication;
+
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.server.ssh.SshAddressesModule;
+import com.google.inject.Inject;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.URISyntaxException;
+import java.util.HashSet;
+import java.util.Set;
+import org.eclipse.jgit.transport.URIish;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class GerritSshApi {
+  static int SSH_COMMAND_FAILED = -1;
+  private static final Logger log = LoggerFactory.getLogger(GerritSshApi.class);
+  private static String GERRIT_ADMIN_PROTOCOL_PREFIX = "gerrit+";
+
+  private final SshHelper sshHelper;
+
+  private final Set<URIish> withoutDeleteProjectPlugin = new HashSet<>();
+
+  @Inject
+  protected GerritSshApi(SshHelper sshHelper) {
+    this.sshHelper = sshHelper;
+  }
+
+  protected boolean createProject(URIish uri, Project.NameKey projectName, String head) {
+    OutputStream errStream = sshHelper.newErrorBufferStream();
+    String cmd = "gerrit create-project --branch " + head + " " + projectName.get();
+    try {
+      execute(uri, cmd, errStream);
+    } catch (IOException e) {
+      logError("creating", uri, errStream, cmd, e);
+      return false;
+    }
+    return true;
+  }
+
+  protected boolean deleteProject(URIish uri, Project.NameKey projectName) {
+    if (!withoutDeleteProjectPlugin.contains(uri)) {
+      OutputStream errStream = sshHelper.newErrorBufferStream();
+      String cmd = "deleteproject delete --yes-really-delete --force " + projectName.get();
+      int exitCode = -1;
+      try {
+        exitCode = execute(uri, cmd, errStream);
+      } catch (IOException e) {
+        logError("deleting", uri, errStream, cmd, e);
+        return false;
+      }
+      if (exitCode == 1) {
+        log.info(
+            "DeleteProject plugin is not installed on {}; will not try to forward this operation to that host");
+        withoutDeleteProjectPlugin.add(uri);
+        return true;
+      }
+    }
+    return true;
+  }
+
+  protected boolean updateHead(URIish uri, Project.NameKey projectName, String newHead) {
+    OutputStream errStream = sshHelper.newErrorBufferStream();
+    String cmd = "gerrit set-head " + projectName.get() + " --new-head " + newHead;
+    try {
+      execute(uri, cmd, errStream);
+    } catch (IOException e) {
+      log.error(
+          "Error updating HEAD of remote repository at {} to {}:\n"
+              + "  Exception: {}\n  Command: {}\n  Output: {}",
+          uri,
+          newHead,
+          e,
+          cmd,
+          errStream,
+          e);
+      return false;
+    }
+    return true;
+  }
+
+  private URIish toSshUri(URIish uri) throws URISyntaxException {
+    String uriStr = uri.toString();
+    if (uri.getHost() != null && uriStr.startsWith(GERRIT_ADMIN_PROTOCOL_PREFIX)) {
+      return new URIish(uriStr.substring(GERRIT_ADMIN_PROTOCOL_PREFIX.length()));
+    }
+    String rawPath = uri.getRawPath();
+    if (!rawPath.endsWith("/")) {
+      rawPath = rawPath + "/";
+    }
+    URIish sshUri = new URIish("ssh://" + rawPath);
+    if (sshUri.getPort() < 0) {
+      sshUri = sshUri.setPort(SshAddressesModule.DEFAULT_PORT);
+    }
+    return sshUri;
+  }
+
+  private int execute(URIish uri, String cmd, OutputStream errStream) throws IOException {
+    try {
+      URIish sshUri = toSshUri(uri);
+      return sshHelper.executeRemoteSsh(sshUri, cmd, errStream);
+    } catch (URISyntaxException e) {
+      log.error("Cannot convert {} to SSH uri", uri, e);
+    }
+    return SSH_COMMAND_FAILED;
+  }
+
+  public void logError(String msg, URIish uri, OutputStream errStream, String cmd, IOException e) {
+    log.error(
+        "Error {} remote repository at {}:\n  Exception: {}\n  Command: {}\n  Output: {}",
+        msg,
+        uri,
+        e,
+        cmd,
+        errStream,
+        e);
+  }
+}