Bazel: Update time attribute of file entries in plugin artifact

Due to this Bazel issue: [1] non .class file entries are normalized in
singlejar Bazel utility. As the consequence even JavaScript and HTML
files have the timestamp: 2010-01-01 00:00. This makes it problematic
to refresh the plugin artifacts in browser because of the cache if a
new plugin version is deployed in Gerrit server.

To rectify, touch the content of the plugin artifact in stamp action.

The 'touch' command uses the system default timezone if none is
supplied. This makes zip files dependent on the timezone of the
generating machine.

Zip by default stores extended attributes (eg. ctime, atime) on Unix
systems. These can be further sources of non-determinism, so switch it
off with --no-extra.

[1] https://github.com/bazelbuild/bazel/issues/10789

Bug: Issue 12349
Change-Id: I5b3bbba8a3df15f37ab1a21c48768697e8bd2f36
1 file changed
tree: a939b061cb5cd12c94e6501f828f08b2a2f04df2
  1. lib/
  2. tools/
  3. .gitignore
  4. bouncycastle.bzl
  5. BUILD
  6. COPYING
  7. gerrit_api.bzl
  8. gerrit_api_maven_local.bzl
  9. gerrit_gwt.bzl
  10. gerrit_plugin.bzl
  11. gerrit_polymer.bzl
  12. README.md
  13. rules_python.bzl
  14. WORKSPACE
README.md

Gerrit Code Review Rules for Bazel

Overview

These build rules are used for building Gerrit Code Review plugins with Bazel. Plugins are compiled as .jar files containing plugin code and dependencies.

Setup

To be able to use the Gerrit rules, you must provide bindings for the plugin API jars. The easiest way to do so is to add the following to your WORKSPACE file, which will give you default versions for Gerrit plugin API.

git_repository(
  name = "com_github_davido_bazlets",
  remote = "https://github.com/davido/bazlets.git",
  commit = "2ede19cb2d2dd9d04bcb70ffc896439a27e5d50d",
)
load("@com_github_davido_bazlets//:gerrit_api.bzl",
     "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:

load("@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
     "gerrit_api_maven_local")
gerrit_api_maven_local()

Basic Example

Suppose you have the following directory structure for a simple plugin:

[workspace]/
    WORKSPACE
	BUILD
    src/main/java/
	src/main/resources/
	[...]

To build this plugin, your BUILD can look like this:

load("//tools/bzl:plugin.bzl", "gerrit_plugin")

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",
    ],
    resources = glob(["src/main/**/*"]),
)

Now, you can build the Gerrit plugin by running bazel build <plugin>.

For a real world example, see the reviewers plugin.

gerrit_plugin

gerrit_plugin(name, srcs, resources, gwt_module, deps, manifest_entries):

Implicit output target

  • <name>.jar: library containing built plugin jar