1 files changed, 164 insertions, 0 deletions
diff --git a/java/com/google/gerrit/httpd/raw/BazelBuild.java b/java/com/google/gerrit/httpd/raw/BazelBuild.java
new file mode 100644
index 0000000000..430f0b518d
--- /dev/null
+++ b/java/com/google/gerrit/httpd/raw/BazelBuild.java
@@ -0,0 +1,164 @@
+// Copyright (C) 2016 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.httpd.raw;
+
+import static com.google.common.base.MoreObjects.firstNonNull;
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import com.google.common.base.Joiner;
+import com.google.common.escape.Escaper;
+import com.google.common.flogger.FluentLogger;
+import com.google.common.html.HtmlEscapers;
+import com.google.common.io.ByteStreams;
+import com.google.gerrit.launcher.GerritLauncher;
+import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.util.http.CacheHeaders;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InterruptedIOException;
+import java.io.PrintWriter;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+import javax.servlet.http.HttpServletResponse;
+import org.eclipse.jgit.util.RawParseUtils;
+
+public class BazelBuild {
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  private final Path sourceRoot;
+
+  public BazelBuild(Path sourceRoot) {
+    this.sourceRoot = sourceRoot;
+  }
+
+  // builds the given label.
+  public void build(Label label) throws IOException, BuildFailureException {
+    ProcessBuilder proc = newBuildProcess(label);
+    proc.directory(sourceRoot.toFile()).redirectErrorStream(true);
+    logger.atInfo().log("building %s", label.fullName());
+    long start = TimeUtil.nowMs();
+    Process rebuild = proc.start();
+    byte[] out;
+    try (InputStream in = rebuild.getInputStream()) {
+      out = ByteStreams.toByteArray(in);
+    } finally {
+      rebuild.getOutputStream().close();
+    }
+
+    int status;
+    try {
+      status = rebuild.waitFor();
+    } catch (InterruptedException e) {
+      throw new InterruptedIOException(
+          "interrupted waiting for: " + Joiner.on(' ').join(proc.command()));
+    }
+    if (status != 0) {
+      logger.atWarning().log("build failed: %s", new String(out, UTF_8));
+      throw new BuildFailureException(out);
+    }
+
+    long time = TimeUtil.nowMs() - start;
+    logger.atInfo().log("UPDATED    %s in %.3fs", label.fullName(), time / 1000.0);
+  }
+
+  // Represents a label in bazel.
+  static class Label {
+    protected final String pkg;
+    protected final String name;
+
+    public String fullName() {
+      return "//" + pkg + ":" + name;
+    }
+
+    @Override
+    public String toString() {
+      return fullName();
+    }
+
+    // Label in Bazel style.
+    Label(String pkg, String name) {
+      this.name = name;
+      this.pkg = pkg;
+    }
+  }
+
+  static class BuildFailureException extends Exception {
+    private static final long serialVersionUID = 1L;
+
+    final byte[] why;
+
+    BuildFailureException(byte[] why) {
+      this.why = why;
+    }
+
+    public void display(String rule, HttpServletResponse res) throws IOException {
+      res.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+      res.setContentType("text/html");
+      res.setCharacterEncoding(UTF_8.name());
+      CacheHeaders.setNotCacheable(res);
+
+      Escaper html = HtmlEscapers.htmlEscaper();
+      try (PrintWriter w = res.getWriter()) {
+        w.write("<html><title>BUILD FAILED</title><body>");
+        w.format("<h1>%s FAILED</h1>", html.escape(rule));
+        w.write("<pre>");
+        w.write(html.escape(RawParseUtils.decode(why)));
+        w.write("</pre>");
+        w.write("</body></html>");
+      }
+    }
+  }
+
+  private ProcessBuilder newBuildProcess(Label label) throws IOException {
+    Properties properties = GerritLauncher.loadBuildProperties(sourceRoot.resolve(".bazel_path"));
+    String bazel = firstNonNull(properties.getProperty("bazel"), "bazel");
+    List<String> cmd = new ArrayList<>();
+    cmd.add(bazel);
+    cmd.add("build");
+    if (GerritLauncher.isJdk9OrLater()) {
+      String v = GerritLauncher.getJdkVersionPostJdk8();
+      cmd.add("--host_java_toolchain=@bazel_tools//tools/jdk:toolchain_java" + v);
+      cmd.add("--java_toolchain=@bazel_tools//tools/jdk:toolchain_java" + v);
+    }
+    cmd.add(label.fullName());
+    ProcessBuilder proc = new ProcessBuilder(cmd);
+    if (properties.containsKey("PATH")) {
+      proc.environment().put("PATH", properties.getProperty("PATH"));
+    }
+    return proc;
+  }
+
+  /** returns the root relative path to the artifact for the given label */
+  public Path targetPath(Label l) {
+    return sourceRoot.resolve("bazel-bin").resolve(l.pkg).resolve(l.name);
+  }
+
+  /** Label for the agent specific GWT zip. */
+  public Label gwtZipLabel(String agent) {
+    return new Label("gerrit-gwtui", "ui_" + agent + ".zip");
+  }
+
+  /** Label for the polygerrit component zip. */
+  public Label polygerritComponents() {
+    return new Label("polygerrit-ui", "polygerrit_components.bower_components.zip");
+  }
+
+  /** Label for the fonts zip file. */
+  public Label fontZipLabel() {
+    return new Label("polygerrit-ui", "fonts.zip");
+  }
+}