To specify the version of sbt you want to use on your sbt project, specify the sbt. Sbt was added by bitchomp in dec 2015 and the latest update was made in dec 2015. Conceptual overview of how sbt performs project configuration the two stages of building the project. To use sbt properly we have to know and follow its conventions for source code. Browse other questions tagged scala sbt or ask your own.
The purpose of this project is to provide good support for sbt projects using a multi step compilation task, like play projects. See the next section for how to disable this automatic dependency. A function that registers additional power commands might look like. It explains the basic configuration required to compile, test, and run a project using sbt. Contribute to triplequotesbtscalabench development by creating an account on github.
Starts the scala interpreter with a classpath including the compiled sources and all dependencies. Integration for sbt that lets you generate sources for your scalate templates and precompile them as part of the normal compilation process. This a compiles your scala project and then b starts a repl session. What am i meant to put into srcmainresources and srctestsresources. Changing scala sources directory in sbt stack overflow. You can run the project with sbt run or enter the scala repl with sbt console. Next, it shows you how to use the peripheral libraries in sbt to make common tasks simpler. Sbt alvin alexander java, scala, unix, perl, mac os x. Youll learn to appreciate how sbt improves the process of. Add withsources to the dependency definition from download sources in the official documentation of sbt downloading source and api documentation jars is usually handled by an ide plugin. How can i let sbt download the source of scalalibrary. Use the console or consolequick commands inside the sbt shell.
A minimal sbt plugin is a scala library that is built against the version of scala that sbt runs currently, 2. March 01, 2016 scala sbt plugins functional programming. How to compile, run, and package a scala project with sbt. So, i dont need config it manually after generate idea project using sbt ideaplugin. I would like sbt to compile scalafiles from a given directory instead of the regular srcmainscala directory i have tried both defining a. Cleaning is necessary since genjavadoc does not track the correspondence between scala sources and emitted java files, leading to extraneous java sources when deleting classes. Refer jdk compatibility for scala java compatiblity detail. This scala version will only be used for the build and not for sbt, which will still use the version it was compiled against. Im having quite a few troubles pointing at a custom directory for scala sourcefiles in sbt. The scalaversion configures the version of scala used for compilation. Configure and use scala set the scala version used for building the project. When you develop a spark project using scala language, you have to package your project into a jar file.
A plugin can define a sequence of sbt settings that are automatically added to all projects or that are. Enter your email address to follow this blog and receive notifications of new posts by email. We can then say that plugins exploits the power and flexibility of sbt. The initial goals are to enable importing vanilly sbt projects, driving the build process from eclipse and provide an output console. Little or no configuration required for simple projects scala based build definition that can use the full flexibility of scala code accurate incremental recompilation using information extracted from the compiler. Type console to start a repl session from inside sbt.
See contributors for the list of documentation contributors. When i click go to declaration on some method in my project code, idea shows me how it is implemented redirects me to the library sources. This should not be a normal dependency of the project, so sbt adds a dependency on scalacompiler in the special, private scalatool configuration. There is a nice description in the recent blog decodified from mathias. Once you have completed these steps sbt should happily download the scala. To prevent sbt from running on jdk, install jenv or switch to using sdkman. Type sbt compile to have the project continually compile when files change.
Single jar download of sbt would also be very very useful and speed up the. In sbt project folders hierarchy i am to put my scala sources in srcmainscala and tests in srctestsscala. Its been forked into sbt organization just to do the minimal maintenance required by sbt project. By default, sbt also adds a dependency on the scala library with this version. As ive written before, when i finished writing the scala cookbook it ended up being about 140 pages longer than my editor wanted, and i had to cut some content from the book. Sources in srcmainscala or srcmainjava tests in srctestscala or srctestjava data.
Commercial support lightbend subscription training consulting. In order to compile scala code, run scaladoc, and provide a scala repl, sbt needs the scalacompiler jar. Im using idea12 with the scala plugin and sbt idea for generating the project. Sign in sign up instantly share code, notes, and snippets. How to start a scala repl session inside sbt simple build. Each run compiles both main and test sources for all dependent and. This tutorial describes how to use sbt to compile and run a scala project, and package the p. The sbt build is derived from the maven pom files, and so the same maven profiles and variables can be set to control the sbt build. It shows how to set up the build definition for a scala project using sample code to explain different scenarios and use cases.
If you use scala, chances are you already met sbt for building your program. Scala and java sources locations have to be configured. To start, we go in the website, and we download it. When you import a project and have download sbt sources checked in preferences build, execution. This is an excerpt from the scala cookbook partially modified for the internet. Last i checked update is an everyday command, not some kind of world resetting power purge. Contribute to triplequotesbt scalabench development by creating an account on github. First, make sure you have the java 8 jdk or java 11 jdk installed. This causes sbt to use jdk even when java available on path is jdk 8 or 11. Use the sbt dev mailing list for discussing sbt development. Download sbt jar file and place it into local directory 2. Theres a getting started page focused on using existing plugins, which you may want to read first a plugin is a way to use external code in a build definition. After calling genidea in the sbt shell, everything works fine except for one thing.
A tutorial about effectively building scala projects, sbt in action introduces the sbt tool with a simple project that establishes the fundamentals of running commands and tasks. But sbt is supported for daytoday development since it can provide much faster iterative compilation. The interactive build tool define your tasks in scala. As it turns out, there are plenty of reasons for using sbt. Getting started with sbt for scala introduces sbt and its various features.
A plugin can be a library used to implement a task you might use knockoff to write a markdown processing task. For me the most urgent issue is the state of the source code, which. Setup using giter8 all of the following have instructions for windows mac linux install scala from here optional, sbt will install scala for you. Scala sources are recompiled every time on jdk 9, sbt 0. How do i set the desired scala compiler version in the sbt build.
If you dont have it installed, download java from oracle java 8, oracle java 11, or adoptopenjdk 811. Weve previously discussed the scala build tool, sbt, and how easy it is to extend its abilities using plugins. How to package a scala project to a jar file with sbt. These plugins use the updateclassifiers and updatesbtclassifiers tasks, which produce an update report referencing these jars. If the required version is not available locally, the sbt launcher will download it for you. This blog post will help you understand how to install and set up sbteclipse plugin for running scala application in eclipse ide. Finally, it covers how to deploy software effectively. How to install scala, sbt and spark in ubuntu balas blog. If you would like to take over the ownership of sxr, please contact sbtdev list browsable scala source code in html with. Some of the tests require spark to be packaged first, so always run sbtsbt assembly the first time. You want to use sbt to compile and run a scala project, and package the project as a jar file. Its possible to update the information on sbt or report it as discontinued, duplicated or spam. It may be desirable to have more control over this in.
You want to use eclipse with a project youre managing with sbt. To use a locally built scala version, define the scalahome setting, which is of type optionfile. Creative tools, integration with other apps and services, and the power of adobe sensei. Sources in the project project are the build definition files and are compiled using.
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