I am developing a sbt plugin. In this plugin I generate some new scala sources packaged in a sbt project. Then I need to compile these new files programaticaly so that I could add the generated class in my classLoader.
I do not find any way to compile programaticaly sources from a given sbt project path (and eventually from a classLoader) in the sbt API, something as simple as the sbt command (sbt compile) line would be very convenient, something like:
XXX.compile(path/to/sbt/project)
Thanks
I suggest you have a look at sbt-boilerplate which is an sbt plugin that generates code, works well and is really simple.
Here's a link to the file that you probably want to take a look at
Related
I have been using sbt on windows and a custom build.sbt script in conjunction with an import Chisel._ in the top-level file in order to generate Verilog from my Chisel source successfully.
I'm trying to get an IDE working on Windows to expedite Chisel development. I've gone with the Eclipse based SCALA IDE http://scala-ide.org/download/sdk.html/
I want to compile the Chisel library so that the import Chisel._ can be resolved locally, without having to go off and download the source from the repository each timeand recompile the source. When I download the Chisel-master repo from Git and include the src\main folder in my SCALA project in the SCALA IDE, I get lots of syntax errors in the Chisel SCALA files that prevent me from building the project.
Has anyone done anything like this before on Windows or have any knowledge of working with the SCALA IDE as it may just be a case of undefined symbols in the project configuration?
Not sure exactly what you did with build.sbt respect to recompile (I think it download it only the first time, then it caches it for the future). But I'm using ScalaIDE for Chisel on linux, using the default build.sbt files, maybe you can try to get it working out of the box first to help narrow down the issue.
Here are the steps I took in order to get ScalaIDE work with Chisel:
the latest Scala IDE uses 2.11.8, the current Chisel repository defaults to 2.11.7. So I had to change all the build.sbt reference to scalaVersion from 2.11.7 to 2.11.8
I used sbteclipse
https://github.com/typesafehub/sbteclipse
To create importable the workspace to setup the compilation dependencies.
Except for chiselFrontEnd. For some reason, this package is not added to the dependency. I have to Add chiselFrontEnd as a javabuildpath dependency manually (Properties/JavaBuildPath, under Projects) for my own projects.
To resolve undefined symbols, you can also add a JAR onto the project build path using Project Properties > Java Build Path > Libraries > Add External JARs...
If you are getting your JARs through Maven / SBT, they should be in:
C:\Users\<name>\.ivy2\local\edu.berkeley.cs\chisel3_2.11\jars
If you are using publish-local with chisel3, your JARs should be in
C:\Users\<name>\.ivy2\cache\edu.berkeley.cs\chisel3_2.11\jars
Note that chisel3 is compiled into one JAR, including coreMacros and chiselFrontend sub-projects
Of course, this is a more quick-and-dirty solution compared to something that can parse SBT files.
I have to do some assignments with Scala and I'm a newbie for this language.
In the assignment, the prof requests me to implement serialization and deserialization, using twitter/chill.
https://github.com/twitter/chill/
However, I don't know how to import the libary into my IDE Intellij.
Each time I use val instantiator = new ScalaKryoInstantiator.
IDE notify me that: Cannot resolve symbol ScalaKryoInstantiator.
Could anyone can help me to resolve this issue?
Thanks and Best Regards,
Long.
One way to add a library in a Scala project, if you use sbt, is to add an sbt dependency. Most libraries and jars can be found and downloaded from the maven repositories: https://mvnrepository.com/artifact/com.twitter/chill_2.9.2/0.2.3
If you click the sbt tab on the page above, maven gives you a code snippet which can be directly pasted into your build.sbt. In order to compile and run your project using sbt, open the terminal in the directory where your build.sbt is located and use the "sbt run" command.
If you don't use sbt, download the jar from maven and follow the instructions in this answer: How to add external library in IntelliJ IDEA?
I want to migrate our build from maven to SBT, so now I work separatedly on Build.scala file. However I don't benefit from any syntax highlighting (that is quite obvious, I don't have SBT in my classpath). What is the correct way to get SBT to my classpath, adding sbt-launch.jar does not seem to help.
IntelliJ 13 has built-in SBT support; if you're running a lower version, then you can have a look at their sbt plugin.
There's also an sbt plugin on github for generating idea project files. I've had success with running the gen-idea task it provides.
Run sbt gen-idea. It will create a "YOUR_PROJECT_NAME - build" project within your main project (for whatever your YOUR_PROJECT_NAME happens to be). Under the project folder of the build project, I was able to write a Build.scala with the following code:
import sbt._
object Build extends Build {
}
The SBT Build trait is recognized just fine. I'm running IntelliJ 13 build #IU-133-696, Scala plugin 0.30.378.
Eventually what I did is finished to write my build.sbt stub, and opened a project with it. Now everything seem to work.
I'm using *.scala files in the project folder for configuring my SBT project. I'm using IDEA12 with the Scala Plugin and sbt-idea for generating the project. After calling gen-idea in the SBT shell, everything works fine except for one thing. 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). But when I'm trying to "inspect" SBT's internal sources it shows me something like this:
def settings: Seq[Setting[_]] = { /** compiled code **/ }
How can I attach SBT sources to my IDEA project?
I'm using SBT 0.12.3.
In SBT there are two command which may interest you:
update-classifiers - will download all sources and documentation for all libs in your project
update-sbt-classifiers - downloads sbt sources and docs
This will download all the sources you need. To make an IDEA project with them just call gen-idea sbt-classifiers.
If you don't want to call each time this commands for re-generating you project, you should add something like this to your build.sbt: addCommandAlias("make-idea", ";update-classifiers; update-sbt-classifiers; gen-idea sbt-classifiers").
As of sbt version 1.2.8, the command is changed to:
sbt updateClassifiers - to download all sources and docs
sbt updateSbtClassifiers - to download sbt sources and docs.
I'm currently using sbt to build and run my scala programs. I'm trying to use sbt.Process to execute system commands. I must be missing something because when I try to import sbt.Process in one of my files in src/ I get this error.
not found: value sbt
[error] import sbt.Process._
So it looks like I can't access the sbt package inside my src/ files. What do I need to do to access it? Thanks.
SBT's environment (v 0.7.x) is only available in your build file or a Plugin.
The easiest way to use sbt.Process library (until 0.9.x which will have Process as an independent library) is to copy (BSD License) Process.scala and ProcessImpl.scala into your project
There are different classpaths for running sbt and compiling your source files.
One classpath is for compilation of files in directory project/build (that one contains sbt jars and usually scala library 2.7.7) and the other one is for building source files of your project (that one contains your dependencies from lib and lib_managed and usually scala library 2.8.*). If you'd like to use sbt.Process in your source files you can do two things:
add sbt jar to lib or lib_managed for it to be available on your project's classpath
use snapshot version of scala 2.9, it would have sbt Process built-in as sys.process package
Wait for Scala 2.9, and then just use it out of scala.sys.process.
sbt package has became an integral part of the Scala standard library since version 2.9
...this API has been included in the Scala standard library for version 2.9.
quoted from sbt wiki
Here's the link (scroll down)
well, in order to use it, all you have to do (assuming you are using sbt for build), is to add in build.sbt file the following line of code: sbtPlugin := true it will add the needed dependencies to your project.
of course, this solution is only to get your imports with sbt package to work. you should refactor your code to use the new package scala.sys.process like Daniel C. Sobral suggested.