diff --git a/README.md b/README.md
index 25fd058..3f0d7de 100644
--- a/README.md
+++ b/README.md
@@ -22,22 +22,32 @@
 
 ```python
 git_repository(
-  name = "com_github_davido_bazlets",
-  remote = "https://github.com/davido/bazlets.git",
-  commit = "2ede19cb2d2dd9d04bcb70ffc896439a27e5d50d",
+  name = "com_googlesource_gerrit_bazlets",
+  remote = "https://gerrit.googlesource.com/bazlets",
+  commit = "928c928345646ae958b946e9bbdb462f58dd1384",
 )
-load("@com_github_davido_bazlets//:gerrit_api.bzl",
-     "gerrit_api")
+load("@com_googlesource_gerrit_bazlets//:gerrit_api.bzl", "gerrit_api")
+gerrit_api()
 ```
 
-Another option is to consume snapshot version of gerrit plugin API from local
-Maven repository (`~/.m2`). To use the snapshot version special method is
-provided:
+The `version` parameter allows to override the default API. For release version
+numbers, make sure to also provide artifacts' SHA1 sums via the
+`plugin_api_sha1` and `acceptance_framework_sha1` parameters:
 
 ```python
-load("@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
-     "gerrit_api_maven_local")
-gerrit_api_maven_local()
+load("@com_googlesource_gerrit_bazlets//:gerrit_api.bzl", "gerrit_api")
+gerrit_api(version = "3.0.9",
+           plugin_api_sha1 = "dbcadf2c198b1ee1b74678855e8e10b2c403de1f",
+           acceptance_framework_sha1 = "799cb104f2c0de4394528e38ad487557dd69bb49")
+```
+
+If the version ends in `-SNAPSHOT`, the jars are consumed from the local
+Maven repository (`~/.m2`) per default assumed to be and the SHA1 sums can be
+omitted:
+
+```python
+load("@com_googlesource_gerrit_bazlets//:gerrit_api.bzl", "gerrit_api")
+gerrit_api(version = "3.0.10-SNAPSHOT")
 ```
 
 <a name="basic-example"></a>
@@ -47,11 +57,12 @@
 
 ```
 [workspace]/
-    WORKSPACE
-	BUILD
-    src/main/java/
-	src/main/resources/
-	[...]
+├── src
+│   └── main
+│       ├── java
+│       └── resources
+├── BUILD
+└── WORKSPACE
 ```
 
 To build this plugin, your `BUILD` can look like this:
@@ -62,7 +73,6 @@
 gerrit_plugin(
     name = "reviewers",
     srcs = glob(["src/main/java/**/*.java"]),
-    gwt_module = "com.googlesource.gerrit.plugins.reviewers.ReviewersForm",
     manifest_entries = [
         "Gerrit-PluginName: reviewers",
         "Gerrit-Module: com.googlesource.gerrit.plugins.reviewers.Module",
@@ -81,7 +91,7 @@
 ## gerrit_plugin
 
 ```python
-gerrit_plugin(name, srcs, resources, gwt_module, deps, manifest_entries):
+gerrit_plugin(name, srcs, resources, deps, manifest_entries):
 ```
 
 ### Implicit output target
@@ -126,15 +136,6 @@
       </td>
     </tr>
     <tr>
-      <td><code>gwt_module</code></td>
-      <td>
-        <code>String, optional</code>
-        <p>
-          Name of GWT UI module.
-        </p>
-      </td>
-    </tr>
-    <tr>
       <td><code>deps</code></td>
       <td>
         <code>List of labels, optional</code>
diff --git a/gerrit_api.bzl b/gerrit_api.bzl
index e893012..a616f1e 100644
--- a/gerrit_api.bzl
+++ b/gerrit_api.bzl
@@ -1,48 +1,42 @@
 load("//:bouncycastle.bzl", "bouncycastle_repos")
 load("//:gerrit_api_version.bzl", "gerrit_api_version")
 load("//:rules_python.bzl", "rules_python_repos")
-load("//tools:maven_jar.bzl", "maven_jar")
+load("//tools:maven_jar.bzl", "MAVEN_LOCAL", "MAVEN_CENTRAL", "maven_jar")
 
 """Bazel rule for building [Gerrit Code Review](https://www.gerritcodereview.com/)
 gerrit_api is rule for fetching Gerrit plugin API using Bazel.
 """
 
-VER = "2.16.22"
-
-def gerrit_api():
+def gerrit_api(version = "3.0.11",
+               plugin_api_sha1 = "ee4dc2fceb97c53480470e808d977cbd4a1a7fbe",
+               acceptance_framework_sha1 = "a79748b12948006a43dd03a7735f7abbee598455"):
     gerrit_api_version(
         name = "gerrit_api_version",
-        version = VER,
+        version = version,
     )
 
     bouncycastle_repos()
     rules_python_repos()
 
+    local_repository = version.endswith("-SNAPSHOT")
+
     maven_jar(
         name = "gerrit_plugin_api",
-        artifact = "com.google.gerrit:gerrit-plugin-api:" + VER,
-        sha1 = "6183f35ab5dffa4d2d18137e062329708f0be1ed",
-    )
-    maven_jar(
-        name = "gerrit_plugin_gwtui",
-        artifact = "com.google.gerrit:gerrit-plugin-gwtui:" + VER,
-        sha1 = "faad9af492f07852e242ad2cc464e6f6768a9370",
-        exclude = ["com/google/gwt/*"],
+        artifact = "com.google.gerrit:gerrit-plugin-api:" + version,
+        sha1 = "" if local_repository else plugin_api_sha1,
+        repository = MAVEN_LOCAL if local_repository else MAVEN_CENTRAL,
     )
     maven_jar(
         name = "gerrit_acceptance_framework",
-        artifact = "com.google.gerrit:gerrit-acceptance-framework:" + VER,
-        sha1 = "f36bfb2952c162fbe13bfc6ce870ecdece62d2fc",
+        artifact = "com.google.gerrit:gerrit-acceptance-framework:" + version,
+        sha1 = "" if local_repository else acceptance_framework_sha1,
+        repository = MAVEN_LOCAL if local_repository else MAVEN_CENTRAL,
     )
     native.bind(
         name = "gerrit-plugin-api",
         actual = "@gerrit_plugin_api//jar",
     )
     native.bind(
-        name = "gerrit-plugin-gwtui",
-        actual = "@gerrit_plugin_gwtui//jar",
-    )
-    native.bind(
         name = "gerrit-acceptance-framework",
         actual = "@gerrit_acceptance_framework//jar",
     )
@@ -51,10 +45,6 @@
         actual = "@gerrit_plugin_api//jar:neverlink",
     )
     native.bind(
-        name = "gerrit-plugin-gwtui-neverlink",
-        actual = "@gerrit_plugin_gwtui//jar:neverlink",
-    )
-    native.bind(
         name = "gerrit-acceptance-framework-neverlink",
         actual = "@gerrit_acceptance_framework//jar:neverlink",
     )
diff --git a/gerrit_api_maven_local.bzl b/gerrit_api_maven_local.bzl
deleted file mode 100644
index 1926649..0000000
--- a/gerrit_api_maven_local.bzl
+++ /dev/null
@@ -1,59 +0,0 @@
-load("//:bouncycastle.bzl", "bouncycastle_repos")
-load("//:gerrit_api_version.bzl", "gerrit_api_version")
-load("//:rules_python.bzl", "rules_python_repos")
-load("//tools:maven_jar.bzl", "MAVEN_LOCAL", "maven_jar")
-
-"""Bazel rule for building [Gerrit Code Review](https://www.gerritcodereview.com/)
-gerrit_api is rule for fetching Gerrit plugin API using Bazel.
-"""
-
-VER = "2.16.22-SNAPSHOT"
-
-def gerrit_api_maven_local():
-    gerrit_api_version(
-        name = "gerrit_api_version",
-        version = VER,
-    )
-
-    bouncycastle_repos()
-    rules_python_repos()
-
-    maven_jar(
-        name = "gerrit_plugin_api",
-        artifact = "com.google.gerrit:gerrit-plugin-api:" + VER,
-        repository = MAVEN_LOCAL,
-    )
-    maven_jar(
-        name = "gerrit_plugin_gwtui",
-        artifact = "com.google.gerrit:gerrit-plugin-gwtui:" + VER,
-        repository = MAVEN_LOCAL,
-    )
-    maven_jar(
-        name = "gerrit_acceptance_framework",
-        artifact = "com.google.gerrit:gerrit-acceptance-framework:" + VER,
-        repository = MAVEN_LOCAL,
-    )
-    native.bind(
-        name = "gerrit-plugin-api",
-        actual = "@gerrit_plugin_api//jar",
-    )
-    native.bind(
-        name = "gerrit-plugin-gwtui",
-        actual = "@gerrit_plugin_gwtui//jar",
-    )
-    native.bind(
-        name = "gerrit-acceptance-framework",
-        actual = "@gerrit_acceptance_framework//jar",
-    )
-    native.bind(
-        name = "gerrit-plugin-api-neverlink",
-        actual = "@gerrit_plugin_api//jar:neverlink",
-    )
-    native.bind(
-        name = "gerrit-plugin-gwtui-neverlink",
-        actual = "@gerrit_plugin_gwtui//jar:neverlink",
-    )
-    native.bind(
-        name = "gerrit-acceptance-framework-neverlink",
-        actual = "@gerrit_acceptance_framework//jar:neverlink",
-    )
diff --git a/gerrit_gwt.bzl b/gerrit_gwt.bzl
deleted file mode 100644
index c1980cf..0000000
--- a/gerrit_gwt.bzl
+++ /dev/null
@@ -1,158 +0,0 @@
-load("//tools:maven_jar.bzl", "maven_jar")
-
-GWT_VER = "2.8.2"
-
-OW2_VER = "5.1"
-
-def gerrit_gwt():
-    maven_jar(
-        name = "gwt_user",
-        artifact = "com.google.gwt:gwt-user:" + GWT_VER,
-        sha1 = "a2b9be2c996a658c4e009ba652a9c6a81c88a797",
-        attach_source = False,
-    )
-    maven_jar(
-        name = "gwt_dev",
-        artifact = "com.google.gwt:gwt-dev:" + GWT_VER,
-        sha1 = "7a87e060bbf129386b7ae772459fb9f87297c332",
-        attach_source = False,
-    )
-    maven_jar(
-        name = "javax_validation",
-        artifact = "javax.validation:validation-api:1.0.0.GA",
-        sha1 = "b6bd7f9d78f6fdaa3c37dae18a4bd298915f328e",
-        src_sha1 = "7a561191db2203550fbfa40d534d4997624cd369",
-    )
-    maven_jar(
-        name = "jsinterop_annotations",
-        artifact = "com.google.jsinterop:jsinterop-annotations:1.0.2",
-        sha1 = "abd7319f53d018e11108a88f599bd16492448dd2",
-        src_sha1 = "33716f8aef043f2f02b78ab4a1acda6cd90a7602",
-    )
-    maven_jar(
-        name = "findbugs_jsr305",
-        artifact = "com.google.code.findbugs:jsr305:3.0.1",
-        sha1 = "f7be08ec23c21485b9b5a1cf1654c2ec8c58168d",
-        attach_source = False,
-    )
-    maven_jar(
-        name = "ant_artifact",
-        artifact = "ant:ant:1.6.5",
-        sha1 = "7d18faf23df1a5c3a43613952e0e8a182664564b",
-        src_sha1 = "9e0a847494563f35f9b02846a1c1eb4aa2ee5a9a",
-    )
-    maven_jar(
-        name = "colt_artifact",
-        artifact = "colt:colt:1.2.0",
-        attach_source = False,
-        sha1 = "0abc984f3adc760684d49e0f11ddf167ba516d4f",
-    )
-    maven_jar(
-        name = "tapestry_artifact",
-        artifact = "tapestry:tapestry:4.0.2",
-        attach_source = False,
-        sha1 = "e855a807425d522e958cbce8697f21e9d679b1f7",
-    )
-    maven_jar(
-        name = "w3c_css_sac",
-        artifact = "org.w3c.css:sac:1.3",
-        attach_source = False,
-        sha1 = "cdb2dcb4e22b83d6b32b93095f644c3462739e82",
-    )
-    maven_jar(
-        name = "ow2_asm",
-        artifact = "org.ow2.asm:asm:" + OW2_VER,
-        sha1 = "5ef31c4fe953b1fd00b8a88fa1d6820e8785bb45",
-    )
-    maven_jar(
-        name = "ow2_asm_analysis",
-        artifact = "org.ow2.asm:asm-analysis:" + OW2_VER,
-        sha1 = "6d1bf8989fc7901f868bee3863c44f21aa63d110",
-    )
-    maven_jar(
-        name = "ow2_asm_commons",
-        artifact = "org.ow2.asm:asm-commons:" + OW2_VER,
-        sha1 = "25d8a575034dd9cfcb375a39b5334f0ba9c8474e",
-    )
-    maven_jar(
-        name = "ow2_asm_tree",
-        artifact = "org.ow2.asm:asm-tree:" + OW2_VER,
-        sha1 = "87b38c12a0ea645791ead9d3e74ae5268d1d6c34",
-    )
-    maven_jar(
-        name = "ow2_asm_util",
-        artifact = "org.ow2.asm:asm-util:" + OW2_VER,
-        sha1 = "b60e33a6bd0d71831e0c249816d01e6c1dd90a47",
-    )
-    native.bind(
-        name = "gwt-user",
-        actual = "@gwt_user//jar",
-    )
-    native.bind(
-        name = "gwt-dev",
-        actual = "@gwt_dev//jar",
-    )
-    native.bind(
-        name = "gwt-user-neverlink",
-        actual = "@gwt_user//jar:neverlink",
-    )
-    native.bind(
-        name = "gwt-dev-neverlink",
-        actual = "@gwt_dev//jar:neverlink",
-    )
-    native.bind(
-        name = "javax-validation",
-        actual = "@javax_validation//jar",
-    )
-    native.bind(
-        name = "javax-validation-src",
-        actual = "@javax_validation//src",
-    )
-    native.bind(
-        name = "jsinterop-annotations",
-        actual = "@jsinterop_annotations//jar",
-    )
-    native.bind(
-        name = "jsinterop-annotations-src",
-        actual = "@jsinterop_annotations//src",
-    )
-    native.bind(
-        name = "jsr305",
-        actual = "@findbugs_jsr305//jar",
-    )
-    native.bind(
-        name = "ant",
-        actual = "@ant_artifact//jar",
-    )
-    native.bind(
-        name = "colt",
-        actual = "@colt_artifact//jar",
-    )
-    native.bind(
-        name = "tapestry",
-        actual = "@tapestry_artifact//jar",
-    )
-    native.bind(
-        name = "w3c-css-sac",
-        actual = "@w3c_css_sac//jar",
-    )
-    native.bind(
-        name = "ow2-asm",
-        actual = "@ow2_asm//jar",
-    )
-    native.bind(
-        name = "ow2-asm-analysis",
-        actual = "@ow2_asm_analysis//jar",
-    )
-    native.bind(
-        name = "ow2-asm-commons",
-        actual = "@ow2_asm_commons//jar",
-    )
-    native.bind(
-        name = "ow2-asm-tree",
-        actual = "@ow2_asm_tree//jar",
-    )
-    native.bind(
-        name = "ow2-asm-util",
-        actual = "@ow2_asm_util//jar",
-    )
diff --git a/gerrit_plugin.bzl b/gerrit_plugin.bzl
index e5b1f43..4021733 100644
--- a/gerrit_plugin.bzl
+++ b/gerrit_plugin.bzl
@@ -6,21 +6,11 @@
     _plugin_test_deps = "PLUGIN_TEST_DEPS",
 )
 load("//tools:genrule2.bzl", "genrule2")
-load(
-    "//tools:gwt.bzl",
-    "GWT_COMPILER_ARGS",
-    "GWT_JVM_ARGS",
-    "GWT_PLUGIN_DEPS_NEVERLINK",
-    "GWT_TRANSITIVE_DEPS",
-    "gwt_binary",
-    _gwt_plugin_deps = "GWT_PLUGIN_DEPS",
-)
 
 """Bazel rule for building [Gerrit Code Review](https://www.gerritcodereview.com/)
 gerrit_plugin is rule for building Gerrit plugins using Bazel.
 """
 
-GWT_PLUGIN_DEPS = _gwt_plugin_deps
 PLUGIN_DEPS = _plugin_deps
 PLUGIN_DEPS_NEVERLINK = _plugin_deps_neverlink
 PLUGIN_TEST_DEPS = _plugin_test_deps
@@ -30,17 +20,12 @@
         deps = [],
         provided_deps = [],
         srcs = [],
-        gwt_module = [],
         resources = [],
         manifest_entries = [],
         dir_name = None,
         target_suffix = "",
         **kwargs):
-    gwt_deps = []
     static_jars = []
-    if gwt_module:
-        static_jars = [":%s-static" % name]
-        gwt_deps = GWT_PLUGIN_DEPS_NEVERLINK
 
     if not dir_name:
         dir_name = name
@@ -49,7 +34,7 @@
         name = name + "__plugin",
         srcs = srcs,
         resources = resources,
-        deps = provided_deps + deps + gwt_deps + PLUGIN_DEPS_NEVERLINK,
+        deps = provided_deps + deps + PLUGIN_DEPS_NEVERLINK,
         visibility = ["//visibility:public"],
         **kwargs
     )
@@ -63,36 +48,6 @@
         visibility = ["//visibility:public"],
     )
 
-    if gwt_module:
-        java_library(
-            name = name + "__gwt_module",
-            resources = depset(srcs + resources).to_list(),
-            runtime_deps = deps + GWT_PLUGIN_DEPS,
-            visibility = ["//visibility:public"],
-        )
-        genrule2(
-            name = "%s-static" % name,
-            cmd = " && ".join([
-                "mkdir -p $$TMP/static",
-                "unzip -qd $$TMP/static $(location %s__gwt_application)" % name,
-                "cd $$TMP",
-                "zip -qr $$ROOT/$@ .",
-            ]),
-            tools = [":%s__gwt_application" % name],
-            outs = ["%s-static.jar" % name],
-        )
-        gwt_binary(
-            name = name + "__gwt_application",
-            module = [gwt_module],
-            deps = GWT_PLUGIN_DEPS + GWT_TRANSITIVE_DEPS + [
-                "//external:gwt-dev",
-                "//external:gwt-user",
-            ],
-            module_deps = [":%s__gwt_module" % name],
-            compiler_args = GWT_COMPILER_ARGS,
-            jvm_args = GWT_JVM_ARGS,
-        )
-
     native.genrule(
         name = name + "__gen_stamp_info",
         stamp = 1,
diff --git a/tools/download_file.py b/tools/download_file.py
index 8f790be..f62a43c 100755
--- a/tools/download_file.py
+++ b/tools/download_file.py
@@ -80,7 +80,6 @@
 opts.add_option('-v', help='expected content SHA-1')
 opts.add_option('-x', action='append', help='file to delete from ZIP')
 opts.add_option('--exclude_java_sources', action='store_true')
-opts.add_option('--unsign', action='store_true')
 args, _ = opts.parse_args()
 
 root_dir = args.o
@@ -138,18 +137,6 @@
     print('error opening %s: %s' % (cache_ent, err), file=stderr)
     exit(1)
 
-if args.unsign:
-  try:
-    with ZipFile(cache_ent, 'r') as zf:
-      for n in zf.namelist():
-        if (n.endswith('.RSA')
-            or n.endswith('.SF')
-            or n.endswith('.LIST')):
-          exclude.append(n)
-  except (BadZipfile, LargeZipFile) as err:
-    print('error opening %s: %s' % (cache_ent, err), file=stderr)
-    exit(1)
-
 safe_mkdirs(path.dirname(args.o))
 if exclude:
   try:
diff --git a/tools/gwt.bzl b/tools/gwt.bzl
deleted file mode 100644
index aada689..0000000
--- a/tools/gwt.bzl
+++ /dev/null
@@ -1,287 +0,0 @@
-# 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.
-
-# Port of Buck native gwt_binary() rule. See discussion in context of
-# https://github.com/facebook/buck/issues/109
-load("//tools:genrule2.bzl", "genrule2")
-load("//tools:java.bzl", "java_library2")
-
-BROWSERS = [
-    "chrome",
-    "firefox",
-    "gecko1_8",
-    "safari",
-    "msie",
-    "ie8",
-    "ie9",
-    "ie10",
-    "edge",
-]
-
-ALIASES = {
-    "chrome": "safari",
-    "edge": "gecko1_8",
-    "firefox": "gecko1_8",
-    "msie": "ie10",
-}
-
-MODULE = "com.google.gerrit.GerritGwtUI"
-
-GWT_COMPILER = "com.google.gwt.dev.Compiler"
-
-GWT_JVM_ARGS = ["-Xmx512m"]
-
-GWT_COMPILER_ARGS = [
-    "-XdisableClassMetadata",
-]
-
-GWT_COMPILER_ARGS_RELEASE_MODE = GWT_COMPILER_ARGS + [
-    "-XdisableCastChecking",
-]
-
-GWT_PLUGIN_DEPS_NEVERLINK = [
-    "//external:gerrit-plugin-gwtui-neverlink",
-    "//external:gwt-user-neverlink",
-]
-
-GWT_PLUGIN_DEPS = [
-    "//external:gerrit-plugin-gwtui",
-]
-
-GWT_TRANSITIVE_DEPS = [
-    "//external:ant",
-    "//external:colt",
-    "//external:javax-validation",
-    "//external:javax-validation-src",
-    "//external:jsinterop-annotations",
-    "//external:jsinterop-annotations-src",
-    "//external:jsr305",
-    "//external:tapestry",
-    "//external:w3c-css-sac",
-    "//external:ow2-asm",
-    "//external:ow2-asm-analysis",
-    "//external:ow2-asm-commons",
-    "//external:ow2-asm-tree",
-    "//external:ow2-asm-util",
-]
-
-DEPS = GWT_TRANSITIVE_DEPS + [
-    "//:gwt-dev",
-]
-
-USER_AGENT_XML = """<module rename-to='gerrit_ui'>
-<inherits name='%s'/>
-<set-property name='user.agent' value='%s'/>
-<set-property name='locale' value='default'/>
-</module>
-"""
-
-def gwt_module(gwt_xml = None, resources = [], srcs = [], **kwargs):
-    if gwt_xml:
-        resources = resources + [gwt_xml]
-
-    java_library2(
-        srcs = srcs,
-        resources = resources,
-        **kwargs
-    )
-
-def _gwt_user_agent_module(ctx):
-    """Generate user agent specific GWT module."""
-    if not ctx.attr.user_agent:
-        return None
-
-    ua = ctx.attr.user_agent
-    impl = ua
-    if ua in ALIASES:
-        impl = ALIASES[ua]
-
-    # intermediate artifact: user agent speific GWT xml file
-    gwt_user_agent_xml = ctx.actions.declare_file(ctx.label.name + "_gwt.xml")
-    ctx.actions.write(
-        output = gwt_user_agent_xml,
-        content = USER_AGENT_XML % (MODULE, impl),
-    )
-
-    # intermediate artifact: user agent specific zip with GWT module
-    gwt_user_agent_zip = ctx.actions.declare_file(ctx.label.name + "_gwt.zip")
-    gwt = "%s_%s.gwt.xml" % (MODULE.replace(".", "/"), ua)
-    dir = gwt_user_agent_zip.path + ".dir"
-    cmd = " && ".join([
-        "p=$PWD",
-        "mkdir -p %s" % dir,
-        "cd %s" % dir,
-        "mkdir -p $(dirname %s)" % gwt,
-        "cp $p/%s %s" % (gwt_user_agent_xml.path, gwt),
-        "$p/%s cC $p/%s $(find . | sed 's|^./||')" % (ctx.executable._zip.path, gwt_user_agent_zip.path),
-    ])
-    ctx.actions.run_shell(
-        inputs = [gwt_user_agent_xml] + ctx.files._zip,
-        outputs = [gwt_user_agent_zip],
-        command = cmd,
-        mnemonic = "GenerateUserAgentGWTModule",
-    )
-
-    return struct(
-        zip = gwt_user_agent_zip,
-        module = MODULE + "_" + ua,
-    )
-
-def _gwt_binary_impl(ctx):
-    module = ctx.attr.module[0]
-    output_zip = ctx.outputs.output
-    output_dir = output_zip.path + ".gwt_output"
-    deploy_dir = output_zip.path + ".gwt_deploy"
-
-    deps = _get_transitive_closure(ctx)
-
-    paths = [dep.path for dep in deps.to_list()]
-
-    gwt_user_agent_modules = []
-    ua = _gwt_user_agent_module(ctx)
-    if ua:
-        paths.append(ua.zip.path)
-        gwt_user_agent_modules.append(ua.zip)
-        module = ua.module
-
-    cmd = "%s %s -Dgwt.normalizeTimestamps=true -cp %s %s -war %s -deploy %s " % (
-        ctx.attr._jdk[java_common.JavaRuntimeInfo].java_executable_exec_path,
-        " ".join(ctx.attr.jvm_args),
-        ":".join(paths),
-        GWT_COMPILER,
-        output_dir,
-        deploy_dir,
-    )
-
-    # TODO(davido): clean up command concatenation
-    cmd = cmd + " ".join([
-        "-style %s" % ctx.attr.style,
-        "-optimize %s" % ctx.attr.optimize,
-        "-strict",
-        " ".join(ctx.attr.compiler_args),
-        module + "\n",
-        "rm -rf %s/gwt-unitCache\n" % output_dir,
-        "root=`pwd`\n",
-        "cd %s; $root/%s Cc ../%s $(find .)\n" % (
-            output_dir,
-            ctx.executable._zip.path,
-            output_zip.basename,
-        ),
-    ])
-
-    ctx.actions.run_shell(
-        inputs = depset(direct = gwt_user_agent_modules, transitive = [deps]),
-        outputs = [output_zip],
-        tools = ctx.files._jdk + ctx.files._zip,
-        mnemonic = "GwtBinary",
-        progress_message = "GWT compiling " + output_zip.short_path,
-        command = "set -e\n" + cmd,
-    )
-
-def _get_transitive_closure(ctx):
-    deps = []
-    for dep in ctx.attr.module_deps:
-        deps.append(dep[JavaInfo].transitive_runtime_deps)
-        deps.append(dep[JavaInfo].transitive_source_jars)
-    for dep in ctx.attr.deps:
-        if JavaInfo in dep:
-            deps.append(dep[JavaInfo].transitive_runtime_deps)
-        elif hasattr(dep, "files"):
-            deps.append(dep.files)
-
-    return depset(transitive = deps)
-
-gwt_binary = rule(
-    attrs = {
-        "compiler_args": attr.string_list(),
-        "jvm_args": attr.string_list(),
-        "module": attr.string_list(default = [MODULE]),
-        "module_deps": attr.label_list(allow_files = [".jar"]),
-        "optimize": attr.string(default = "9"),
-        "style": attr.string(default = "OBF"),
-        "user_agent": attr.string(),
-        "deps": attr.label_list(allow_files = [".jar"]),
-        "_jdk": attr.label(
-            default = Label("@bazel_tools//tools/jdk:current_java_runtime"),
-            cfg = "host",
-        ),
-        "_zip": attr.label(
-            default = Label("@bazel_tools//tools/zip:zipper"),
-            cfg = "host",
-            executable = True,
-            allow_single_file = True,
-        ),
-    },
-    outputs = {
-        "output": "%{name}.zip",
-    },
-    implementation = _gwt_binary_impl,
-)
-
-def gwt_genrule(suffix = ""):
-    dbg = "ui_dbg" + suffix
-    opt = "ui_opt" + suffix
-    module_dep = ":ui_module" + suffix
-    args = GWT_COMPILER_ARGS_RELEASE_MODE if suffix == "_r" else GWT_COMPILER_ARGS
-
-    genrule2(
-        name = "ui_optdbg" + suffix,
-        srcs = [
-            ":" + dbg,
-            ":" + opt,
-        ],
-        cmd = "cd $$TMP;" +
-              "unzip -q $$ROOT/$(location :%s);" % dbg +
-              "mv" +
-              " gerrit_ui/gerrit_ui.nocache.js" +
-              " gerrit_ui/dbg_gerrit_ui.nocache.js;" +
-              "unzip -qo $$ROOT/$(location :%s);" % opt +
-              "mkdir -p $$(dirname $@);" +
-              "zip -qr $$ROOT/$@ .",
-        outs = ["ui_optdbg" + suffix + ".zip"],
-        visibility = ["//visibility:public"],
-    )
-
-    gwt_binary(
-        name = opt,
-        module = [MODULE],
-        module_deps = [module_dep],
-        deps = DEPS,
-        compiler_args = args,
-        jvm_args = GWT_JVM_ARGS,
-    )
-
-    gwt_binary(
-        name = dbg,
-        style = "PRETTY",
-        optimize = "0",
-        module_deps = [module_dep],
-        deps = DEPS,
-        compiler_args = GWT_COMPILER_ARGS,
-        jvm_args = GWT_JVM_ARGS,
-    )
-
-def gwt_user_agent_permutations():
-    for ua in BROWSERS:
-        gwt_binary(
-            name = "ui_%s" % ua,
-            user_agent = ua,
-            style = "PRETTY",
-            optimize = "0",
-            module = [MODULE],
-            module_deps = [":ui_module"],
-            deps = DEPS,
-            compiler_args = GWT_COMPILER_ARGS,
-            jvm_args = GWT_JVM_ARGS,
-        )
diff --git a/tools/maven_jar.bzl b/tools/maven_jar.bzl
index c4cae43..46aa4c1 100644
--- a/tools/maven_jar.bzl
+++ b/tools/maven_jar.bzl
@@ -140,8 +140,6 @@
     args = [python, script, "-o", binjar_path, "-u", binurl]
     if ctx.attr.sha1:
         args.extend(["-v", ctx.attr.sha1])
-    if ctx.attr.unsign:
-        args.append("--unsign")
     for x in ctx.attr.exclude:
         args.extend(["-x", x])
 
@@ -168,7 +166,6 @@
         "repository": attr.string(default = MAVEN_CENTRAL),
         "sha1": attr.string(mandatory = False),
         "src_sha1": attr.string(),
-        "unsign": attr.bool(default = False),
         "exports": attr.string_list(),
         "deps": attr.string_list(),
         "_download_script": attr.label(default = Label("//tools:download_file.py")),