env GO111MODULE=on
[!symlink] skip

# 'go get' should resolve modules of imported packages.
go get
go list -deps -f '{{.Module}}' .
stdout golang.org/x/text

go get ./subpkg
go list -deps -f '{{.Module}}' ./subpkg
stdout golang.org/x/text

# Create a copy of the module using symlinks in src/links.
mkdir links
symlink links/go.mod -> $GOPATH/src/go.mod
symlink links/go.sum -> $GOPATH/src/go.sum

        run("api:dependencies", "tool:dependencies")
    }

    void "can force arbitrary version of a module and avoid conflict"() {
        mavenRepo.module("org", "foo", '1.3.3').publish()
        mavenRepo.module("org", "foobar", '1.3.3').publish()
        mavenRepo.module("org", "foo", '1.4.4').publish()
        mavenRepo.module("org", "foo", '1.5.5').publish()

        createDirs("api", "impl", "tool")

<project-modules id="moduleCoreId" project-version="1.5.0">
	<wb-module deploy-name="webservice">
		<property name="context-root" value="webservice"/>
		<wb-resource deploy-path="/WEB-INF/classes" source-path="src/main/java"/>
		<dependent-module archiveName="api-1.0.jar" deploy-path="/WEB-INF/lib" handle="module:/resource/api/api">
			<dependency-type>uses</dependency-type>
		</dependent-module>
	</wb-module>

[short] skip

# 'go run pkg@version' works outside a module.
env GO111MODULE=auto
go run example.com/cmd/a@v1.0.0
stdout '^a@v1.0.0$'


# 'go run pkg@version' reports an error if modules are disabled.
env GO111MODULE=off
! go run example.com/cmd/a@v1.0.0
stderr '^go: modules disabled by GO111MODULE=off; see ''go help modules''$'
env GO111MODULE=on

[[sub::terminology_platform]]
== Platform

A platform is a set of modules aimed to be used together. There are different categories of platforms, corresponding to different use cases:

- module set: often a set of modules published together as a whole. Using one module of the set often means we want to use the same version for all modules of the set. For example, if using `groovy` 1.2, also use `groovy-json` 1.2.

    @Override
    IvyModule dependencyConstraint(Module target) {
        dependencyConstraints << [organisation: target.group, module: target.module, revision: target.version]
        return this
    }

    @Override
    IvyModule dependencyConstraint(Map<String, ?> attributes, Module module) {
        def allAttrs = [organisation: module.group, module: module.module, revision: module.version]
        allAttrs.putAll(attributes)

    def expectGetDynamicRevision(IvyHttpModule module) {
        expectListVersions(module)
        module.ivy.expectGet()
        module.jar.expectGet()
    }

    def expectGetDynamicRevisionMetadata(IvyHttpModule module) {
        expectListVersions(module)
        module.ivy.expectGet()
    }

    private expectListVersions(IvyHttpModule module) {

cd subdir

# 'go get' on empty patterns that are necessarily local to the module
# should warn that the patterns are empty, exactly once.

go get ./...
stderr -count=1 'matched no packages'

go get ./...
stderr -count=1 'matched no packages'

# 'go get' on patterns that could conceivably match nested modules
# should report a module resolution error.

go get example.net/emptysubdir/... # control case

Here, we add an additional source set _integrationTest_ with a `module-info.java`.

```
src
└── integrationTest
    └── java
        └── module-info.java
```

We effectively declare a second module that is only used for testing.
The module is `open`, which means that it allows reflective access to its classes at runtime as required by JUnit's test execution engine.

```
open module org.gradle.sample.integtest.utilities {

_performance optimization_: instead of having to do 2 network requests, one to get Gradle Module Metadata, then one to get the POM/Ivy file in case of a miss, Gradle will first look at the file which is most likely to be present, then only perform a 2nd request if the module was actually published with Gradle Module Metadata.

If you know that the modules you depend on are always published with Gradle Module Metadata, you can optimize the network calls by configuring the metadata sources for...