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.
Related
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 ran sbt eclipse on a Scala Project and when I imported it into Scala IDE(4.0.0 RC2), it gave me a type not found error as the types referred to were actually auto-generated code which were at target/scala-2_10/src_managed/main/compiled_avro/org/... I was able to do a sbt compile at the console though.
I got it to compile by adding the above folder to the Java Build Path.
My question is that since sbt eclipse can already detect Java Projects which the current project depends on and since sbt compile works at the console, should sbt eclipse be able to figure out dependencies to source folders of generated code as well? or maybe such a feature exists and I just don't know about it?
This may not be the correct way of doing things but to fix the issue i did the following.
sbt avro:compile
sbt compile
sbt eclipse
In eclipse i right clicked on target/scala-*/src_managed/main/compiled_avro > build path > use as source folder
The sbteclipse way:
Edit your project or global build.sbt file. My global ~/.sbt/0.13/build.sbt contains:
import com.typesafe.sbteclipse.plugin.EclipsePlugin._
EclipseKeys.createSrc := EclipseCreateSrc.Default + EclipseCreateSrc.Managed
I'm using an older version of _sbteclipse, version 2.5.0 (various non-relevant reasons), which seems to require both the import and a single blank link between each line of real content (this drives me a bit crazy, yes). I don't believe the import is required for newer versions of sbteclipse.
sbt clean avro:compile compile
sbt eclipse
I created a new Scala project in eclipse then added a package and Scala object ,
So far so good ...
i want to add external library so i added a project folder with build.properties plugins.sbt files,and another file build.sbt in the root project.
in the terminal i compiled successfully the project with the sbt compile task.
the problem is that after sbt eclipse command the eclipse project changed from Scala project to something else.... all the packages changed to simple folders and the Scala project is ruined
scala IDE :Build id: 3.0.3-20140327-1716-Typesafe
scala version :2.10.4
sbt version:0.13.0
you can see in the image
Where did you get the eclipse command from? I'm guessing you're using sbteclipse.
I created a new Scala project in eclipse then added a package and Scala object , So far so good ...
If I understand correctly, this is exactly the opposite of what the plugin is intended to do. I think you're suppose to create a plain sbt project, and then let the plugin generate the Eclipse project.
I have recently begun exploring Scala, and have started by installing the Scala IDE in my copy of Eclipse (Indigo). I initially installed the Scala IDE for Scala 2.9, but then noticed that there was a newer release available for Scala 2.10. Installing the newer plug-in over the older one seems to have worked, but...
Scala 2.10 has deprecated the older Scala Actors in favor of Akka Actors. Thus I'm trying to add an import to my toy Scala project:
import akka.actor.Actor
This is flagged in the IDE with the error
not found: object akka
When I look at my Scala project's properties, I indeed do not see any of the akka-* jar files that are mentioned in the Akka documentation.
Do they need to be downloaded and installed separately, even though the Scala IDE plug-in installed the rest of Scala 2.10? Or have package names changed as part of integrating Akka actors in place of the older Scala Actors? (The documentation doesn't say so, but the Scala 2.10 release is fairly recent...)
No, they aren't packaged together.
The easiest way to make sure the Eclipse IDE can see your dependencies (Akka, and anything else referenced in your build.sbt file) is to let sbt do it using the sbteclipse plugin. Here's the instructions I wrote up for co-workers:
Install the "sbteclipse" plugin
This plugin will allow sbt to add the files/references that Eclipse needs to find all the dependencies that you specify in your build.sbt. Otherwise, you will be able to use the IDE, but you will seek all kinds of "object not found" errors.
Just make sure the plugin is being added in your global plugins.sbt file. This file (and it's path) may not exist so you may need to create it at the following location:
~/.sbt $ cd ~/.sbt/0.13/
~/.sbt/0.13 $ mkdir plugins
Edit/create the plugins.sbt file:
~/.sbt/0.13 $ vi plugins/plugins.sbt
then add this line (it may be the only line in the file):
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.5.0")
Running sbteclipse
To use this, you just navigate to a scala project on the commandline and run the following. If you already had Eclipse open, go ahead and restart it.
/sites/ewuser (master)$ sbt eclipse
References:
How to initialize a new Scala project in sbt, Eclipse and github
Official sbteclipse plugin
The Akka artifacts are not bundled with the Scala IDE (yet), you will have to add “akka-actor_2.10” and friends to your project’s dependencies.
Download the akka for eclipse from below location
http://downloads.typesafe.com/akka/akka_2.11-2.4.1.zip?_ga=1.167921254.618585520.1450199987
extract the zip
add dependencies from the lib folder into project
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.