By clicking Sign up for GitHub, you agree to our terms of service and This is quite problematic, but Gradle provides a simple workaround for this: the worker API. implements useful common, The LoggerFactory is a utility class producing Loggers for various logging APIs, Its simpler, so why should you bother with the more complex syntax? Can you work in physics research with a data science degree? What is the concise way of using gradle DirectoryProperty objects? A provider may represent a task output. This is both a lot of work, and will make the Groovy and Kotlin build files look very different. It extends FileCollection to add hierarchy query and manipulation methods. Best Java code snippets using org.gradle.api.file.DirectoryProperty (Showing top 20 results out of 315) org.gradle.api.file DirectoryProperty. Thank you in advance! Why + any cause for alarm? Do Hard IPs in FPGA require instantiation? I would prefer a really big breaking change in Gradle 8-10 where the old approach is completely removed and the new one is added as default. Well, there is a reason (we never finished the migration to the Provider API), but it's not a good one. ), but maybe something that looks like this? from a project extension 1. All topics are marked as " Closed " and can't be edited. This is exactly what our plugin is doing: This says "please add the output of the generateLexer task as a source directory". Gradle In CV, how to mention articles published only in arxiv? What is the grammatical basis for understanding in Psalm 2:7 differently than Psalm 22:1? You may check out the related API usage on the sidebar. This is less convenient from plugin author's perspective, but at least end-user DSL becomes smooth. Always add a settings.gradle to the root directory of your build to avoid the initial performance impact. Sets the property to have the same value of the given provider. That's not what's in the proposal. @mkobit That's a lot of overhead to put on plugin authors for ever field on a task they write. (ETA_INTERMEDIATES_DIRECTORY).get().file(proguardFile).getAsFile(); java.nio.file.SimpleFileVisitor() {, FileVisitResult visitFile(Path file, BasicFileAttributes attrs), FileVisitResult postVisitDirectory(Path dir, IOException exc), Creating JSON documents from java classes using gson. Sets the value of the property the given value. Directory dir = pluginConfig.getSolutionDir(). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, That's what I initially thought, but how can the. If the supplied providers represents a task or the output of a task, the resulting provider I fear that option 2 will create 3 ways to understand the Provider API: I think I would prefer to have the Groovy syntax sugar print a deprecation warning informing users how to properly use the Property object and pointing them to use set until Gradle 6.0 or further (if we don't convert the entire code base to use provider API by then). Creates a read-only FileCollection containing the given files, as defined by Project.files(Object). DirectoryProperty convention (@Nullable Directory value); DirectoryProperty convention (Provider<? The exact form of a file: URI is system-dependent, hence the transformation performed by this constructor is also system-dependent.. For a given abstract pathname f it is guaranteed that new File( f.toURI()).equals( f.getAbsoluteFile()) so long as the original abstract pathname, the URI, and the new . You can obtain an instance of ConfigurableFileCollection by calling Project.files(Object) or ObjectFactory.fileCollection(). The property is available because it is set in the superclass's constructor. From my point view nothing should be changed here. Seems like there might be a few missing Kotlin feautre requests (like how do you have setters for a val? From version 4.10 onwards, Gradle automatically cleans the project-specific cache directory. Second, it defines a java-gradle-plugin, which is the Gradle way of saying "this is a plugin for Gradle, written in Java". build.gradle. A typical use of a provider is to pass values from one Gradle model element to another, e.g. I've had to carefully explain to plugin developers that this logic completely stops working if anyone has any logic at all that forces the configuration of their task before the configure block runs. This sort of confusion has arisen with other developers I've helped write plugins. But we are working on the Kotlin compiler plugin, that will support overloading = for Kotlin Gradle DSL. Making statements based on opinion; back them up with references or personal experience. BundleFileBuilder bundleFileBuilder = ConfigBuilderModule.getInjector().getInstance(BundleFileBuilder. Returns the value of this provider if it has a value present. Does "critical chance" have any reason to exist? For example: myPropName1=myPropValue1 myPropName2=myPropValue2. get() remains unaffected by this proposal. Therefore, the question I got from my colleague was legitimate: How do I link the task to run in the right phase, create a proper output dir, and add it to the java compile source set? I wonder if setter overloading (KT-4075) or setter-only properties (KT-6519) would allow something like this to work? The shift in mindset is, therefore, not to wonder how to compile the generated sources and put them "on the classpath", like youd do in Maven, but simply explain that theres another directory of sources to consider. It can infer dependencies thanks to those objects. Gradle 2.0 - Proper way to load a java properties file? Which is semantically much more powerful. Note how I used the convention method to set the input directory, instead of the set method that we used in the build script: while using both would work, theres a semantic difference between the two: in a plugin, you most likely want to set the convention value, which is the value which is used by default, if the user says nothing. To learn more, see our tips on writing great answers. First of all, its a project plugin, which basically means its a plugin which is supposed to be applied on a project build file, so typically a build.gradle file. Working With Files - Gradle User Manual Creates a new File instance by converting the given file: URI into an abstract pathname.. Kotlin plugin integration was done in Kotlin DSL assignment plugin integration #22240 and is merged to master. So the API is slightly different. privacy statement. This way, we would have a single way of setting values for Property in all language: What is your feeling on just removing (informing users) the Groovy syntax sugar and keeping everything as-is? What we would like to do is to make = work with properties of type Property and friends. Adds a set of source paths to this collection. Continue with Recommended Cookies. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. https://raw.githubusercontent.com/gradle/kotlin-dsl/master/samples/provider-properties/build.gradle.kts. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. First, were going to create an extension, which is going to hold what is relevant for user configuration: the name of the person to greet and what outro we want to use. Represents some configurable directory location, whose value is mutable and is not necessarily currently known until later. In this blog post, weve leveraged a real world use case, integrating lexer generation via JFlex, to explain how to properly write a Gradle plugin which: uses the lazy provider API, making it immune to configuration ordering problems, explains how Gradles "task dependencies" are implicit, avoiding hardcoding relationships between tasks, and making it much more robust to arbitrary configuration changes, doesnt rely on arbitrary ordering (e.g, like in Maven, "all sources of all generators must be generated before you can compile anything") but instead knows that only if you need to compile the main source set, then you need to generate JFlex sources, uses the worker API, letting us working around a bug in the JFlex library regarding shared mutable state. I have a new idea to incorporate this feature into the plugin for the This category contains all old forum topics. Connect and share knowledge within a single location that is structured and easy to search. public interface ProjectLayout. To see all available qualifiers, see our documentation. I strongly prefer that whatever convenience that we add to query the value or to set the value should be non-nullable. Using the return value of TaskContainer.register (String), which is a provider that . This method can also be used to discard the value of the property, by passing it null . The name of the system property must start with org.gradle.project, followed by the name of the property we want to set, and then by the value. Also rename set(Provider) to setValue(Provider). What we would like to do is to make = work with properties of type Property and friends. There are a number of ways to create a Provider instance. Thats better, but not sufficient, because the result depends on when this is called: if the build directory is changed after the task is configured, then youd get the wrong result, which is why lots of users start to randomly add afterEvaluate to workaround such problems. This, I believe, is this biggest reason this API proposal doesn't work, unfortunately. . Outcome #2: Gradle models relationships using domain objects which are shared between plugins. Returns the given default value if a value is not available. What side effects do you have in mind? They are deleted if they haven't been used for 7 days. provider value using the supplied combiner function. RegularFilePropertyDirectoryPropertydependencyFails1filedirDirectoryProperty. This method can also be used to clear the value of the property, by passing null as the value. In the 2nd case, the output would be correctly wired to target/generated/jflex. There might be some advantage to converting the Provider and associated interfaces to Kotlin. You signed in with another tab or window. For wiring the value you "set" is no value at all but a promise of a future value. Manage Settings For a simple value assignment there are none because value semantics. I believe the pain identified by this issue mostly goes away when we get more of the world on kts. In our case, we want to create a task which is going to invoke the JFlex library to parse some .jflex files and generate .java files, so lets do it! Note: This interface is not intended for implementation by build script or plugin authors. Sets the tasks which build the files of this collection. Returns the value of this provider if it has a value present, otherwise throws java.lang.IllegalStateException. I'm told gradle is big on using convention to minimize the size of scripts; how do I make this the default value so that my tasks don't have to define it? The goal is to provide a mechanism where plugin authors do not have to utilize the Project::afterEvaluate method. I already mentioned that one of the main advantages is that it solves ordering issues, by being fully lazy. When this provider represents a task or the output of a task, the new provider will be considered an output Last but not least, we also discovered that the JFlex API itself has problems: it's using shared mutable state (here static state) for configuration, making it inherently not thread safe.Because what we had to do was pretty simple (take a jflex file and generate a lexer from it), we took advantage of this to write our own Gradle plugin to handle calls to JFlex. = null and it can be used the same way from kotlin and groovy. In our case, we want a task which is going to read JFlex files and generate sources. A provider may also provide a value (The reason this issue come up recently is exactly because of this very effort.). Well see later more reasons why its interesting to let Gradle to this for you, but for now the obvious reason is that it reduces the amount of code you have to write: you dont need to know how to create a DirectoryProperty: Gradle will do it for you. An important feature of lazy properties is that they can be connected together so that changes to one property are automatically reflected in other properties. File(project.getBuildDir(), GATEWAY_BUILD_DIRECTORY), BUILT_BUNDLE_DIRECTORY); (!pluginConfig.getBuiltEnvironmentBundleDir(). Whenever this provider has no value, the new There isnt a difference between what a plugin can do and what you can do in a build script, however, as soon as you have things which go beyond configuration, its a good idea to move things into a plugin. Sadly, this is, by and large, not true. Setting Gradle properties to build a project [Tutorial] - Packt Hub Returns a new Provider whose value is the value of this provider transformed using the given function. How to read a properties files and use the values in project Gradle script? The only thing why something should changed here is that the Groovy DSL and the Kotlin DSL should look similar, right? to a task, or between tasks. The worker API lets us workaround what should probably be considered as a bug in JFlex! I first implemented it in Groovy and then tried to use it in Kotlin in a different project and failed hard. Alternatively, if we don't implement some way to use = to automatically convert to .set(), then all Kotlin DSL builds scripts will have to be converted to call .set() themselves, everywhere. it means that if you use =, you should always use =. Its time to introduce how you could use this type in a build script: set the input directory to src/main/jflex, set the output directory to build/generated/jflex. There are other kinds of plugins in Gradle, which I wont cover in this post. You typically use a FileTree to represent files to copy or the contents of an archive.. You can obtain a FileTree instance using Project.fileTree(java.util.Map), Project.zipTree(Object) or Project.tarTree(Object).. But none of your options can solve that. Returns the value of this provider if it has a value present. This might be a personal preference, but for me the syntax using = in Groovy is much preferable for its clarity. A multi-project build must have a settings.gradle (.kts) file in the root project of the multi-project hierarchy. When I develop a DSL I use var name: String? The consent submitted will only be used for data processing originating from this website. Extending the Delta-Wye/-Y Transformation to higher polygons. Represents a directory at some fixed location on the file system. In this case, we declare classloader isolation, as well as the inputs of the action, which is going to be executed in isolation. If you remember, I mentioned in the introduction of the blog post that the JFlex API uses a mix of static state and instance state to configure itself. Already on GitHub? Here you can discuss any and all things related to the Gradle Forums. First of all, that our plugin is an independent Gradle project: it lives in the same repository as our main project, but its really an independent build. builtBy (java.lang.Object. Concise and statically-typed Property<T> assignment #9268 This wouldn't necessarily need to be a syntax mechanism. Will just the increase in height of water column increase pressure or does mass play any role in it? Just brainstorming if there are other options. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. the provider implementation may be mutable or use values from some changing source. At this stage, were pretty much done with the wiring, but we still miss the actual implementation of the task. This is a very important Gradle type, which belongs to the so-called "provider API" or, as you can sometimes read, the "lazy API". This method can also be used to create an empty collection, but the collection may not be mutated later. Similarly, in Gradle, the unit which is responsible for executing an action is called a task. The new provider will be live, so that each time it is queried, it queries this provider and applies the transformation to the result.
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