One of the truly great things about Play and SBT is the 'hot compile' option. Makes the development workflow astoundingly productive. Does Yesod currently (or future?) have this similar ability? Thanks in advance.
There is a yesod devel command which automatically rebuilds and runs the project.
Related
first time publishing there !
I first want to say that I'm a real noob to yocto, and I'm trying to add greengrass to my yocto project.
The issue is, my core layer is thud, but there aren't any meta-aws in thud, starting at zeus.
How I can I still go though and install my meta-aws on my yocto ?
Thx,
I found meta-aws available for thud here. Just git clone -b thud git#github.com:aws/meta-aws.git into your layers directory, then bitbake-layers add-layer /path/to/meta-aws, then you should be able to use their recipes.
I've tried to install Leiningen according to the official installation instructions. When running lein repl I get the following error message:
/usr/local/bin/lein: line 315: java: command not found
This leads me to believe that Leiningen requires a JDK/JRE to actually run but there is no mention of it in the docs. So, do I first need to install a JDK/JRE?
Yes, see installation instruction https://github.com/technomancy/leiningen#installation
Yes, you need to install JDK first.
Instruction for Windows installation is here
Leinengen comes packaged as a JAR file with a small bash script wrapping it, allowing for easy command line usage. This means that, like any other clojure or java program, it require the JVM to be run.
If you take a look at ~/.lein/self-installs/ you will see the JAR file(s) leiningen utilizes to run it's tasks.
One thing worthy of noting as well is that Leiningen starts its own JVM process before creating a new JVM process for your clojure program. They are not run in the same JVM container (to enforce isolation). Also, this initial Leiningen JVM process will not close until your clojure program has finished running as well (unless you utilize the trampoline).
As always, it's worth reading through the Leiningen docs at some point to better learn about what leiningen is truly doing. Hopefully that helps... happy coding!
I was going through this tutorial
http://wiki.jetbrains.net/intellij/Getting_started_with_La_Clojure and I got stuck here
http://wiki.jetbrains.net/intellij/Getting_started_with_La_Clojure#Opening_project_in_IntelliJ_IDEA. I don't know way but 'open project' dialog does show the file 'project.clj'. So I'm not able open the clojure project. (And also I don't know how to create new one)
Is this bug of IDEA/La clojure or I did something wrong?
To open/import clj projects, you need to have the Leiningen plugin installed.
Unfortunately, the latest official release of the lein plugin for intellij doesn't work well with Intellij13 (crashed my idea on load every time until removed manually).
I'm guessing that because of Cursive there wasn't a newer release even though the latest version of the plugin on github does work.
I followed the instructions on the lein plugin's git page to create a plugin bundle from the latest version: https://github.com/derkork/intellij-leiningen-plugin
Assuming you're using Intellij13, creating the bundle yourself and then installing it from disk will enable you to open clj project files.
I am a complete newbie to SBT and scala world. I wanna create a lift application and while exploring on how to do it i stumbled everywhere that i must use SBT. So i went to the github wiki page and followed the instructions for windows. I downloaded the jar given there and created sbt.bat and put both the files in c:\sbt and added it to my path. Then i went c:\liftprojects and typed sbt.
It did something but as given everywhere i expected a wizard of some sort which will ask me what kind of project i wanna build and stuff and generate the directory structure just like mvn:archetype:generate but it didnt do anything. It just ran some downloads and created two dirs
project
boot
blah
target
blah
target
scala 2.8.1
blah
in github wiki it says sbt follows maven bir structure but i cannot see it here.
Am i doin something the wrong way. Im stuck on this. All i need is to know how to create a lift app or a scala project.
To get started with Lift 2.4 my recommendation is to clone the examples repository
git clone https://github.com/lift/lift_24_sbt
Then you can use one of the project templates in that repo, with both 2.8 and 2.9 Scala versions. For example, a good way to start with Lift is using the basic project (with Scala 2.8.1 in this example)
cd lift_24_sbt/scala_28/lift_basic/
Start sbt by typing
./sbt
On Windows use sbt.bat. Inside the sbt console, type
update
jetty-run
Open a web browser and point it to http://localhost:8080 to open the Lift application. To stop the application server, simply type jetty-stop.
You can use this template project, or the other templates in that repo, as a starting point for your applications.
Lift wiki contains a lot of useful information. Specifically, you can follow the instructions getting started section here.
I am about to start a new personal project. It aims to be a pretty big one so I thought it would be a good idea to keep some sort of CVS. I have also read lot of interesting stuff about unit testing and I would like to include some system that automatically builds the project and runs a series of test after each check in.
The characteristics are:
Only one developer and one machine (just me and my computer!).
Include a CVS.
Include automated testing.
The software should be free (as in no-cost) and run under Linux.
It is going to be C++ and ANTLR based.
So far, I have set up SVN and Eclipse+CDT+ANTLR for development but I am pretty lost about the automated build+test setting. To write the tests I have been thinking in Boost.Test or UnitTest++.
So that's the source of my question. How should I set up my local test/build machine?
Links to valuable tutorials are more than welcome.
Thanks.
It seems that most open source continuous integration servers are built on java and does not support C++ "out-of-the-box". However there are some links you can start with (note that for running most open source continuous integration servers you need a java environment):
What continuous integration tool is best for a C++ project - some alternatives for continuous integration software
Continuous integration for C++ - some ideas for Hudson configuration
Using CruiseControl with C++ - some ideas and configurations for CruiseControl
Compiling C/C++ code with Ant - if you do use the "Makefile project" in CDT and do not want to use make as a build tool
I personally prefer Hudson because of its simply install (no need for application server just start with java -jar hudson.war) and easy to use and quite "clever" gui. Hudson can checkout your code from SVN (or CVS) and can run a shell script or Ant file as a build script. Maybe you have to spend a few days to set up a configuration with a proper build script but I think it worth the time.
The sort of automatic process you are looking at is called continuous integration. There is software to help you with this - a good example is JetBrains TeamCity. You will also hear of people using CruiseControl, Atlassian Bamboo and so on for this.
To take full advantage of this, you may also want to look at an automated build tool like Ant or Mavenl; your continuous integration build will then use this as its build runner.
A good starting point would be the Martin Fowler page on CI or the Wikipedia one.