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The External Dependency Manager for Unity (EDM4U) (formerly Play Services Resolver / Jar Resolver) is intended to be used by any Unity plugin that requires:
Updated releases are available on GitHub
Many Unity plugins have dependencies upon Android specific libraries, iOS CocoaPods, and sometimes have transitive dependencies upon other Unity plugins. This causes the following problems:
EDM provides solutions for each of these problems.
The Android Resolver component of this plugin will download and integrate Android library dependencies and handle any conflicts between plugins that share the same dependencies.
Without the Android Resolver, typically Unity plugins bundle their AAR and
JAR dependencies, e.g. a Unity plugin SomePlugin
that requires the Google
Play Games Android library would redistribute the library and its transitive
dependencies in the folder SomePlugin/Android/
. When a user imports
SomeOtherPlugin
that includes the same libraries (potentially at different
versions) in SomeOtherPlugin/Android/
, the developer using SomePlugin
and
SomeOtherPlugin
will see an error when building for Android that can be hard
to interpret.
Using the Android Resolver to manage Android library dependencies:
The iOS Resolver component of this plugin integrates with CocoaPods to download and integrate iOS libraries and frameworks into the Xcode project Unity generates when building for iOS. Using CocoaPods allows multiple plugins to utilize shared components without forcing developers to fix either duplicate or incompatible versions of libraries included through multiple Unity plugins in their project.
The Package Manager (PM) makes use of NPM registry servers for package hosting and provides ways to discover, install, upgrade and uninstall packages. This makes it easier for developers to manage plugins within their projects.
However, installing additional package registries requires a few manual steps
that can potentially be error prone. The Package Manager Resolver
component of this plugin integrates with
PM to provide a way to
auto-install PM package registries when a .unitypackage
is installed which
allows plugin maintainers to ship a .unitypackage
that can provide access
to their own PM registry server to make it easier for developers to
manage their plugins.
Finally, the Version Handler component of this plugin simplifies the process of managing transitive dependencies of Unity plugins and each plugin's upgrade process.
For example, without the Version Handler plugin, if:
SomePlugin
includes EDM4U
plugin at
version 1.1.SomeOtherPlugin
includes EDM4U
plugin at version 1.2.The version of EDM4U
included in the developer's project depends upon the
order the developer imports SomePlugin
or SomeOtherPlugin
.
This results in:
EDM4U
at version 1.2, if SomePlugin
is imported then SomeOtherPlugin
is imported.EDM4U
at version 1.1, if SomeOtherPlugin
is imported then
SomePlugin
is imported.The Version Handler solves the problem of managing transitive dependencies by:
When using the Version Handler to manage EDM4U
included in SomePlugin
and
SomeOtherPlugin
, from the prior example, version 1.2 will always be the
version activated in a developer's Unity project.
Plugin creators are encouraged to adopt this library to ease integration for their customers. For more information about integrating EDM4U into your own plugin, see the Plugin Redistribution section of this document.
The External Dependency Manager for Unity plugin by default logs usage to Google Analytics. The purpose of the logging is to quantitatively measure the usage of functionality, to gather reports on integration failures and to inform future improvements to the developer experience of the External Dependency Manager plugin. Note that the analytics collected are limited to the scope of the EDM4U plugin’s usage.
For details of what is logged, please refer to the usage of
EditorMeasurement.Report()
in the source code.
The Android Resolver and iOS Resolver components of the plugin only work with Unity version 4.6.8 or higher.
The Version Handler component only works with Unity 5.x or higher as it
depends upon the PluginImporter
UnityEditor API.
The Package Manager Resolver component only works with Unity 2018.4 or above, when scoped registry support was added to the Package Manager.
Before you import EDM4U into your plugin project, you first
need to consider whether you intend to redistribute EDM4U
along with your own plugin.
If you're a plugin maintainer, redistributing EDM4U
inside your own plugin
will ease the integration process for your users, by resolving dependency
conflicts between your plugin and other plugins in a user's project.
If you wish to redistribute EDM4U
inside your plugin,
you must follow these steps when importing the
external-dependency-manager-*.unitypackage
, and when exporting your own plugin
package:
external-dependency-manager-*.unitypackage
into your plugin
project by
running Unity from the command line, ensuring that
you add the -gvh_disable
option.Assets/PlayServicesResolver
and
Assets/ExternalDependencyManager
directory.-gvh_disable
option.You must specify the -gvh_disable
option in order for the Version
Handler to work correctly!
For example, the following command will import the
external-dependency-manager-1.2.46.0.unitypackage
into the project
MyPluginProject
and export the entire Assets folder to
MyPlugin.unitypackage
:
Unity -gvh_disable \
-batchmode \
-importPackage external-dependency-manager-1.2.46.0.unitypackage \
-projectPath MyPluginProject \
-exportPackage Assets MyPlugin.unitypackage \
-quit
The Version Handler component relies upon deferring the load of editor DLLs
so that it can run first and determine the latest version of a plugin component
to activate. The build of EDM4U
plugin has Unity asset metadata that is
configured so that the editor components are not initially enabled when it's
imported into a Unity project. To maintain this configuration when importing
the external-dependency-manager.unitypackage
into a Unity plugin project, you
must specify the command line option -gvh_disable
which will prevent the
Version Handler component from running and changing the Unity asset metadata.
The Android Resolver copies specified dependencies from local or remote Maven repositories into the Unity project when a user selects Android as the build target in the Unity editor.
Add the external-dependency-manager-*.unitypackage
to your plugin
project (assuming you are developing a plugin). If you are redistributing
EDM4U with your plugin, you must follow the
import steps in the Getting Started section!
Copy and rename the SampleDependencies.xml file into your plugin and add the dependencies your plugin requires.
The XML file just needs to be under an Editor
directory and match the
name *Dependencies.xml
. For example,
MyPlugin/Editor/MyPluginDependencies.xml
.
Follow the steps in the Getting Started section when you are exporting your plugin package.
For example, to add the Google Play Games library
(com.google.android.gms:play-services-games
package) at version 9.8.0
to
the set of a plugin's Android dependencies:
<dependencies>
<androidPackages>
<androidPackage spec="com.google.android.gms:play-services-games:9.8.0">
<androidSdkPackageIds>
<androidSdkPackageId>extra-google-m2repository</androidSdkPackageId>
</androidSdkPackageIds>
</androidPackage>
</androidPackages>
</dependencies>
The version specification (last component) supports:
9.8.0
9.8.+
would match 9.8.0, 9.8.1 etc. choosing the most
recent version.LATEST
or +
. We do not recommend using this
unless you're 100% sure the library you depend upon will not break your
Unity plugin in future.The above example specifies the dependency as a component of the Android SDK
manager such that the Android SDK manager will be executed to install the
package if it's not found. If your Android dependency is located on Maven
central it's possible to specify the package simply using the androidPackage
element:
<dependencies>
<androidPackages>
<androidPackage spec="com.google.api-client:google-api-client-android:1.22.0" />
</androidPackages>
</dependencies>
By default the Android Resolver automatically monitors the dependencies you have
specified and the Plugins/Android
folder of your Unity project. The
resolution process runs when the specified dependencies are not present in your
project.
The auto-resolution process can be disabled via the
Assets > External Dependency Manager > Android Resolver > Settings
menu.
Manual resolution can be performed using the following menu options:
Assets > External Dependency Manager > Android Resolver > Resolve
Assets > External Dependency Manager > Android Resolver > Force Resolve
Resolved packages are tracked via asset labels by the Android Resolver.
They can easily be deleted using the
Assets > External Dependency Manager > Android Resolver > Delete Resolved Libraries
menu item.
Some AAR files (for example play-services-measurement) contain variables that
are processed by the Android Gradle plugin. Unfortunately, Unity does not
perform the same processing when using Unity's Internal Build System, so the
Android Resolver plugin handles known cases of this variable substitution
by exploding the AAR into a folder and replacing ${applicationId}
with the
bundleID
.
Disabling AAR explosion and therefore Android manifest processing can be done
via the Assets > External Dependency Manager > Android Resolver > Settings
menu. You may want to disable explosion of AARs if you're exporting a project
to be built with Gradle / Android Studio.
Some AAR files contain native libraries (.so files) for each ABI supported by Android. Unfortunately, when targeting a single ABI (e.g x86), Unity does not strip native libraries for unused ABIs. To strip unused ABIs, the Android Resolver plugin explodes an AAR into a folder and removes unused ABIs to reduce the built APK size. Furthermore, if native libraries are not stripped from an APK (e.g you have a mix of Unity's x86 library and some armeabi-v7a libraries) Android may attempt to load the wrong library for the current runtime ABI completely breaking your plugin when targeting some architectures.
AAR explosion and therefore ABI stripping can be disabled via the
Assets > External Dependency Manager > Android Resolver > Settings
menu.
You may want to disable explosion of AARs if you're exporting a project to be
built with Gradle / Android Studio.
By default the Android Resolver will use Gradle to download dependencies prior to integrating them into a Unity project. This works with Unity's internal build system and Gradle / Android Studio project export.
It's possible to change the resolution strategy via the
Assets > External Dependency Manager > Android Resolver > Settings
menu.
Using the default resolution strategy, the Android resolver executes the following operations:
Plugins/Android
from the project.*Dependencies.xml
files.download_artifacts.gradle
with Gradle to resolve conflicts and,
if successful, download the set of resolved Android libraries (AARs, JARs).applicationId
in the
AndroidManifest.xml with the project's bundle ID. This means resolution
must be run if the bundle ID is changed again.Plugins/Android
so they will be included when
Unity invokes the Android build.Unity 5.6 introduced support for customizing the build.gradle
used to build
Unity projects with Gradle. When the Patch mainTemplate.gradle setting is
enabled, rather than downloading artifacts before the build, Android resolution
results in the execution of the following operations:
Plugins/Android
from the project and remove sections delimited with
// Android Resolver * Start
and // Android Resolver * End
lines.*Dependencies.xml
files..srcaar
files in the build to .aar
and exclude them from
being included directly by Unity in the Android build as
mainTemplate.gradle
will be patched to include them instead from their
local maven repositories.mainTemplate.gradle
at the
line matching the pattern
.*apply plugin: 'com\.android\.(application|library)'.*
or the section
starting at the line // Android Resolver Repos Start
.
If you want to control the injection point in the file, the section
delimited by the lines // Android Resolver Repos Start
and
// Android Resolver Repos End
should be placed in the global scope
before the dependencies
section.mainTemplate.gradle
at the line matching the pattern ***DEPS***
or
the section starting at the line // Android Resolver Dependencies Start
.
If you want to control the injection point in the file, the section
delimited by the lines // Android Resolver Dependencies Start
and
// Android Resolver Dependencies End
should be placed in the
dependencies
section.mainTemplate.gradle
at the line matching the pattern android +{
or the section starting at
the line // Android Resolver Exclusions Start
.
If you want to control the injection point in the file, the section
delimited by the lines // Android Resolver Exclusions Start
and
// Android Resolver Exclusions End
should be placed in the global
scope before the android
section.The Android Resolver creates the
ProjectSettings/AndroidResolverDependencies.xml
to quickly determine the set
of resolved dependencies in a project. This is used by the auto-resolution
process to only run the expensive resolution process when necessary.
It's possible to display the set of dependencies the Android Resolver
would download and process in your project via the
Assets > External Dependency Manager > Android Resolver > Display Libraries
menu item.
The iOS resolver component of this plugin manages
CocoaPods. A CocoaPods Podfile
is generated and
the pod
tool is executed as a post build process step to add dependencies
to the Xcode project exported by Unity.
Dependencies for iOS are added by referring to CocoaPods.
Add the external-dependency-manager-*.unitypackage
to your plugin
project (assuming you are developing a plugin). If you are redistributing
EDM4U with your plugin, you must follow the
import steps in the Getting Started section!
Copy and rename the SampleDependencies.xml file into your plugin and add the dependencies your plugin requires.
The XML file just needs to be under an Editor
directory and match the
name *Dependencies.xml
. For example,
MyPlugin/Editor/MyPluginDependencies.xml
.
Follow the steps in the Getting Started section when you are exporting your plugin package.
For example, to add the AdMob pod, version 7.0 or greater with bitcode enabled:
<dependencies>
<iosPods>
<iosPod name="Google-Mobile-Ads-SDK" version="~> 7.0" bitcodeEnabled="true"
minTargetSdk="6.0" addToAllTargets="false" />
</iosPods>
</dependencies>
The CocoaPods
are either:
Xcode project
integration.pod
tool
is used as intended to generate a xcworkspace which references the
CocoaPods. We call this Xcode workspace
integration.The resolution strategy can be changed via the
Assets > External Dependency Manager > iOS Resolver > Settings
menu.
In order to modify the generated Podfile you can create a script like this:
using System.IO;
public class PostProcessIOS : MonoBehaviour {
[PostProcessBuildAttribute(45)]//must be between 40 and 50 to ensure that it's not overriden by Podfile generation (40) and that it's added before "pod install" (50)
private static void PostProcessBuild_iOS(BuildTarget target, string buildPath)
{
if (target == BuildTarget.iOS)
{
using (StreamWriter sw = File.AppendText(buildPath + "/Podfile"))
{
//in this example I'm adding an app extension
sw.WriteLine("\ntarget 'NSExtension' do\n pod 'Firebase/Messaging', '6.6.0'\nend");
}
}
}
Adding registries to the Package Manager (PM) is a manual process. The Package Manager Resolver (PMR) component of this plugin makes it easy for plugin maintainers to distribute new PM registry servers and easy for plugin users to manage PM registry servers.
Add the external-dependency-manager-*.unitypackage
to your plugin
project (assuming you are developing a plugin). If you are redistributing
EDM4U with your plugin, you must follow the
import steps in the Getting Started section!
Copy and rename the SampleRegistries.xml file into your plugin and add the registries your plugin requires.
The XML file just needs to be under an Editor
directory and match the
name *Registries.xml
or labeled with gumpr_registries
. For example,
MyPlugin/Editor/MyPluginRegistries.xml
.
Follow the steps in the Getting Started section when you are exporting your plugin package.
For example, to add a registry for plugins in the scope com.coolstuff
:
<registries>
<registry name="Cool Stuff"
url="https://unityregistry.coolstuff.com"
termsOfService="https://coolstuff.com/unityregistry/terms"
privacyPolicy="https://coolstuff.com/unityregistry/privacy">
<scopes>
<scope>com.coolstuff</scope>
</scopes>
</registry>
</registries>
When PMR is loaded it will prompt the developer to add the registry to their
project if it isn't already present in the Packages/manifest.json
file.
For more information, see Unity's documentation on scoped package registries.
It's possible to add and remove registries that are specified via PMR XML configuration files via the following menu options:
Assets > External Dependency Manager > Package Manager Resolver >
Add Registries
will prompt the user with a window which allows them to
add registries discovered in the project to the Package Manager.Assets > External Dependency Manager > Package Manager Resolver >
Remove Registries
will prompt the user with a window which allows them to
remove registries discovered in the project from the Package Manager.Assets > External Dependency Manager > Package Manager Resolver >
Modify Registries
will prompt the user with a window which allows them to
add or remove registries discovered in the project.PMR can migrate Version Handler packages installed in the Assets
folder
to PM packages. This requires the plugins to implement the following:
.unitypackage
must include a Version Handler manifests that describes
the components of the plugin. If the plugin has no dependencies
the manifest would just include the files in the plugin.versions.VERSION.keyword
list) that maps the PM package
to a Version Handler package using the format
vh-name:VERSION_HANDLER_MANIFEST_NAME
where VERSION_HANDLER_MANIFEST_NAME
is the name of the manifest defined in the .unitypackage
. For
more information see the description of the gvhp_manifestname
asset label
in the Version Handler Usage section.When using the Assets > External Dependency Manager >
Package Manager Resolver > Migrate Packages
menu option, PMR then
will:
Apply
button.PMR can be configured via the Assets > External Dependency Manager >
Package Manager Resolver > Settings
menu option:
Add package registries
when enabled, when the plugin loads or registry
configuration files change, this will prompt the user to add registries
that are not present in the Package Manager.Prompt to add package registries
will cause a developer to be prompted
with a window that will ask for confirmation before adding registries.
When this is disabled registries are added silently to the project.Prompt to migrate packages
will cause a developer to be prompted
with a window that will ask for confirmation before migrating packages
installed in the Assets
directory to PM packages.Enable Analytics Reporting
when enabled, reports the use of the plugin
to the developers so they can make imrpovements.Verbose logging
when enabled prints debug information to the console
which can be useful when filing bug reports.The Version Handler component of this plugin manages:
exportpath
label.Since the Version Handler needs to modify Unity asset metadata (.meta
files),
to enable / disable components, rename and delete asset files it does not
work with Package Manager installed packages. It's still possible to
include EDM4U in Package Manager packages, the Version Handler component
simply won't do anything to PM plugins in this case.
If a plugin is imported at multiple different versions into a project, if
the Version Handler is enabled, it will automatically check all managed
assets to determine the set of assets that are out of date and assets that
should be removed. To disable automatic checking managed assets disable
the Enable version management
option in the
Assets > External Dependency Manager > Version Handler > Settings
menu.
If version management is disabled, it's possible to check managed assets
manually using the
Assets > External Dependency Manager > Version Handler > Update
menu option.
Plugins managed by the Version Handler, those that ship with manifest files,
can displayed using the Assets > External Dependency Manager >
Version Handler > Display Managed Packages
menu option. The list of plugins
are written to the console window along with the set of files used by each
plugin.
Plugins managed by the Version Handler, those that ship with manifest files,
can be removed using the Assets > External Dependency Manager >
Version Handler > Uninstall Managed Packages
menu option. This operation
will display a window that allows a developer to select a set of plugins to
remove which will remove all files owned by each plugin excluding those that
are in use by other installed plugins.
Files managed by the Version Handler, those labeled with the gvh
asset label,
can be checked to see whether anything needs to be upgraded, disabled or
removed using the Assets > External Dependency Manager >
Version Handler > Update
menu option.
Some developers move assets around in their project which can make it
harder for plugin maintainers to debug issues if this breaks Unity's
special folders rules.
If assets are labeled with their original install / export path
(see gvhp_exportpath
below), Version Handler can restore assets to their
original locations when using the Assets > External Dependency Manager >
Version Handler > Move Files To Install Locations
menu option.
Some behavior of the Version Handler can be configured via the
Assets > External Dependency Manager > Version Handler > Settings
menu
option.
Enable version management
controls whether the plugin should automatically
check asset versions and apply changes. If this is disabled the process
should be run manually when installing or upgrading managed plugins using
Assets > External Dependency Manager > Version Handler > Update
.Rename to canonical filenames
is a legacy option that will rename files to
remove version numbers and other labels from filenames.Prompt for obsolete file deletion
enables the display of a window when
obsolete files are deleted allowing the developer to select which files to
delete and those to keep.Allow disabling files via renaming
controls whether obsolete or disabled
files should be disabled by renaming them to myfilename_DISABLED
.
Renaming to disable files is required in some scenarios where Unity doesn't
support removing files from the build via the PluginImporter.Enable Analytics Reporting
enables / disables usage reporting to plugin
developers to improve the product.Verbose logging
enables very noisy log output that is useful for
debugging while filing a bug report or building a new managed plugin.Use project settings
saves settings for the plugin in the project rather
than system-wide.The Version Handler employs a couple of methods for managing version selection, upgrade and removal of plugins.
myfile.txt
would be `myfile_version-x.y.z.txt).
This allows the Version Handler to determine which set of files are the
same file at different versions, select the most recent version and prompt
the developer to clean up old versions.Unity plugins can be managed by the Version Handler using the following steps:
gvh
asset label to each asset (file) you want Version Handler
to manage.gvh_version-VERSION
label to each asset where VERSION
is the
version of the plugin you're releasing (e.g 1.2.3).gvhp_exportpath-PATH
label to each asset where PATH
is the
export path of the file when the .unitypackage
is created. This is
used to track files if they're moved around in a project by developers.gvh_targets-editor
label to each editor DLL in your
plugin and disable editor
as a target platform for the DLL.
The Version Handler will enable the most recent version of this DLL when
the plugin is imported.MY_UNIQUE_PLUGIN_NAME_VERSION.txt
that lists all the files in your plugin relative to the project root.
Then add the gvh_manifest
label to the asset to indicate this file is
a plugin manifest.gvhp_manifestname-NAME
label to your manifest file
to provide a human readable name for your package. If this isn't provided
the name of the manifest file will be used as the package name.
NAME can match the pattern [0-9]+[a-zA-Z -]' where a leading integer
will set the priority of the name where
0` is the highest priority
and preferably used as the display name. The lowest value (i.e highest
priority name) will be used as the display name and all other specified
names will be aliases of the display name. Aliases can refer to previous
names of the package allowing renaming across published versions.If you follow these steps:
To build this plugin from source you need the following tools installed:
You can build the plugin by running the following from your shell (Linux / OSX):
./gradlew build
or Windows:
./gradlew.bat build
Each time a new build of this plugin is checked into the source tree you need to do the following:
pluginVersion
in build.gradle
CHANGELOG.md
with the new version number and changes included in
the release../gradlew release
which performs the following:
external-dependency-manager-*.unitypackage
exploded
directory.plugin
directory.
The GUIDs of all asset metadata is modified due to the version number
change. Each file within the plugin is versioned to allow multiple
versions of the plugin to be imported into a Unity project which allows
the most recent version to be activated by the Version Handler
component../gradlew gitCreateReleaseCommit
which
performs git commit -a -m "description from CHANGELOG.md"
./gradlew gitTagRelease
which performs the following:
git tag -a pluginVersion -m "version RELEASE"
to tag the release.git push --tag REMOTE HEAD:master