Groovy Rules

Rules

groovy_library
groovy_and_java_library
groovy_binary
groovy_junit_test
spock_test

Overview

These build rules are used for building Groovy projects with Bazel. Groovy libraries may interoperate with and depend on Java libraries and vice-versa.

Setup

To be able to use the Groovy rules, you must provide bindings for the following targets:

//external:groovy-sdk, pointing at the Groovy SDK binaries
//external:groovy, pointing at the Groovy core language jar
//external:junit, pointing at JUnit (only required if using the test rules)
//external:spock, pointing at Spock (only required if using spock_test)

The easiest way to do so is to add the following to your WORKSPACE file:

http_archive(
    name = "io_bazel_rules_groovy",
    url = "https://github.com/bazelbuild/rules_groovy/archive/0.0.3.tar.gz",
    sha256 = "3194a45a6c3d2947380efb08e2fa5634c67eafa215368f4258ae60381f05dea5",
    strip_prefix = "rules_groovy-0.0.3",
)
load("@io_bazel_rules_groovy//groovy:groovy.bzl", "groovy_repositories")
groovy_repositories()

Basic Example

Suppose you have the following directory structure for a simple Groovy and Java application:

[workspace]/
    WORKSPACE
    src/main/groovy/
        app/
            BUILD
            GroovyApp.groovy
        lib/
            BUILD
            GroovyLib.groovy
            JavaLib.java
    src/test/groovy/
        lib/
            BUILD
            LibTest.groovy

Then, to build the code under src/main/groovy/lib/, your src/main/groovy/lib/BUILD can look like this:

load("@io_bazel_rules_groovy//groovy:groovy.bzl", "groovy_library")

groovy_library(
    name = "groovylib",
    srcs = glob(["*.groovy"]),
    visibility = ["//visibility:public"],
    deps = [
        ":javalib",
    ],
)

java_library(
    name = "javalib",
    srcs = glob(["*.java"]),
)

For simplicity, you can combine Groovy and Java sources into a single library using groovy_and_java_library. Note that this allows the Groovy code to reference the Java code, but not vice-versa. Your src/main/groovy/lib/BUILD file would then look like this:

load("@io_bazel_rules_groovy//groovy:groovy.bzl", "groovy_and_java_library")

groovy_and_java_library(
    name = "lib",
    srcs = glob(["*.groovy", "*.java"]),
)

To build the application under src/main/groovy/app, you can define a binary using groovy_binary as follows:

load("@io_bazel_rules_groovy//groovy:groovy.bzl", "groovy_binary")

groovy_binary(
    name = "GroovyApp",
    srcs = glob(["*.groovy"]),
    main_class = "app.GroovyApp",
    deps = [
         "//src/main/groovy/lib:groovylib",
    ],
)

Finally, you can write tests in Groovy using groovy_test. The srcs of this rule will be converted into names of class files that are passed to JUnit. For this to work, the test sources must be under src/test/groovy or src/test/java. To build the test under src/test/groovy/lib, your BUILD file would look like this:

load("@io_bazel_rules_groovy//groovy:groovy.bzl", "groovy_test", "groovy_library")


groovy_library(
  name = "testlib",
  srcs = glob(["*.groovy"]),
)

groovy_test(
  name = "LibTest",
  srcs = ["LibTest.groovy"],
  deps = [":testlib"],
)

If you're using JUnit or Spock, see groovy_junit_test or spock_test for wrappers that make testing with these systems slightly more convenient.

groovy_library

groovy_library(name, srcs, deps, **kwargs)

Attributes
`name`	`Name, required` A unique name for this rule.
`srcs`	`List of labels, required` List of .groovy source files used to build the library.
`deps`	`List of labels or .jar files, optional` List of other libraries to be included on the compile-time classpath when building this library. These can be either other `groovy_library` targets, `java_library` targets, `groovy_and_java_library` targets, or raw .jar files.
`**kwargs`	`see java_binary` The other arguments of this rule will be passed to the `java_import` that wraps the groovy library.

groovy_and_java_library

groovy_and_java_library(name, srcs, deps, **kwargs)

Attributes
`name`	`Name, required` A unique name for this rule.
`srcs`	`List of labels, required` List of .groovy and .java source files used to build the library.
`deps`	`List of labels or .jar files, optional` List of other libraries to be included on the compile-time classpath when building this library. These can be either other `groovy_library` targets, `java_library` targets, `groovy_and_java_library` targets, or raw .jar files.
`**kwargs`	`see java_binary` The other arguments of this rule will be passed to the `java_import` that wraps the groovy library.

groovy_binary

groovy_binary(name, main_class, srcs, deps, **kwargs)

Attributes
`name`	`Name, required` A unique name for this rule.
`main_class`	`String, required` The name of either a class containing a `main` method or a Groovy script file to use as an entry point (see here for more details on scripts vs. classes).
`srcs`	`List of labels, required` List of .groovy source files used to build the application.
`deps`	`List of labels or .jar files, optional` List of other libraries to be included on both the compile-time classpath when building this application and the runtime classpath when executing it. These can be `groovy_library` targets, `java_library` targets, `groovy_and_java_library` targets, or raw .jar files.
`**kwargs`	`see java_binary` The other arguments of this rule will be passed to the `java_binary` underlying the `groovy_binary`.

groovy_test

groovy_test(name, deps, srcs, data, resources, jvm_flags, size, tags)

Attributes
`name`	`Name, required` A unique name for this rule.
`srcs`	`List of labels, required` List of .groovy source files whose names will be converted to classes passed to JUnitCore.
`deps`	`List of labels or .jar files, optional` List of libraries to be included on both the compile-time classpath when building this test and on the runtime classpath when executing it. These can be `groovy_library` targets, `java_library` targets, `groovy_and_java_library` targets, or raw .jar files.
`resources`	`List of labels, optional` A list of data files to include on the test's classpath. This is accomplished by creating a `java_library` containing only the specified resources and including that library in the test's dependencies.
`jvm_flags`	`List of strings, optional` A list of flags to embed in the wrapper script generated for running this binary.

groovy_junit_test

groovy_junit_test(name, tests, deps, groovy_srcs, java_srcs, data, resources, jvm_flags, size, tags)

Attributes
`name`	`Name, required` A unique name for this rule.
`tests`	`List of labels, required` List of .groovy source files that will be used as test specifications that will be executed by JUnit.
`groovy_srcs`	`List of labels, optional` List of additional .groovy source files that will be used to build the test.
`java_srcs`	`List of labels, optional` List of additional .java source files that will be used to build the test.
`deps`	`List of labels or .jar files, optional` List of libraries to be included on both the compile-time classpath when building this test and on the runtime classpath when executing it. These can be `groovy_library` targets, `java_library` targets, `groovy_and_java_library` targets, or raw .jar files.
`resources`	`List of labels, optional` A list of data files to include on the test's classpath. This is accomplished by creating a `java_library` containing only the specified resources and including that library in the test's dependencies.
`jvm_flags`	`List of strings, optional` A list of flags to embed in the wrapper script generated for running this binary.

spock_test

spock_test(name, specs, deps, groovy_srcs, java_srcs, data, resources, jvm_flags, size, tags)

Attributes
`name`	`Name, required` A unique name for this rule.
`specs`	`List of labels, required` List of .groovy source files that will be used as test specifications that will be executed by JUnit.
`groovy_srcs`	`List of labels, optional` List of additional .groovy source files that will be used to build the test.
`java_srcs`	`List of labels, optional` List of additional .java source files that will be used to build the test.
`deps`	`List of labels or .jar files, optional` List of libraries to be included on both the compile-time classpath when building this test and on the runtime classpath when executing it. These can be `groovy_library` targets, `java_library` targets, `groovy_and_java_library` targets, or raw .jar files.
`resources`	`List of labels, optional` A list of data files to include on the test's classpath. This is accomplished by creating a `java_library` containing only the specified resources and including that library in the test's dependencies.
`jvm_flags`	`List of strings, optional` A list of flags to embed in the wrapper script generated for running this binary.

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rules_groovy's Introduction

Groovy Rules

Rules

Overview

Setup

Basic Example

groovy_library

groovy_and_java_library

groovy_binary

groovy_test

groovy_junit_test

spock_test

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