wsargent

Useful Scalac Flags

So, there have been some discussions and angry tweets recently about irritating Scala "features" (like value discarding and auto-tupling) that can actually be turned off by selecting the right compiler flag in conjunction with -Xfatal-warnings. I highly recommend a set of options something like those below.

scalacOptions ++= Seq(
  "-deprecation",           
  "-encoding", "UTF-8",       // yes, this is 2 args
  "-feature",                
 "-language:existentials",

wsargent

Keybase proof

I hereby claim:

• I am wsargent on github.
• I am will_sargent (https://keybase.io/will_sargent) on keybase.
• I have a public key whose fingerprint is CD69 70B7 2D00 E5BE 9A33 0EF3 C1E8 BF06 2BC6 C4B7

To claim this, I am signing this object:

wsargent

#!/bin/bash

export PW=`cat password`

# Create a JKS keystore that trusts the example CA, with the default password.  
# This is used by the client.
keytool -import -v \
  -alias exampleca \
  -file exampleca.crt \
  -keypass:env PW \

wsargent

fooapp@srv:~$ cat app/env/PLAY_OPTS 

export DATABASE_URL="jdbc:postgresql://127.0.0.1/foobar"

# We could wire a different configuration file here
# or set up a different database on the fly
export PLAY_OPTS="-DapplyEvolutions.default=true -DapplyDownEvolutions.default=true -Ddb.default.url="$DATABASE_URL" -Ddb.default.user=fooapp -Ddb.default.password=fooapppw -Ddb.default.driver=org.postgresql.Driver"

wsargent

https://docs.google.com/a/typesafe.com/presentation/d/1QBhMeRRq5Gs5UfgaqvZ_3-LaxC-fQviLbPi5O8fA71c/edit?usp=sharing

wsargent

#!/usr/bin/env bash
#
# A more capable sbt runner, coincidentally also called sbt.
# Author: Paul Phillips <paulp@typesafe.com>

# todo - make this dynamic
declare -r sbt_release_version=0.13.5
declare -r sbt_unreleased_version=0.13.5
declare -r buildProps=project/build.properties

wsargent

def setupMocks(onSubmitFunc(): => acm:ApplicationContextMock): Unit = {
    val acm: ApplicationContextMock = new ApplicationContextMock

    onSubmitFunc(acm)

    tester = new WicketTester(new Application {
      protected override def getSpringInjector: SpringComponentInjector = {
        return new SpringComponentInjector(this, acm, true)
      }
    })

wsargent

[Provide gist to the building of base boxes below:]

http://vault.centos.org/4.0/isos/i386/
http://vault.centos.org/5.4/isos/x86_64/
http://vault.centos.org/5.1/isos/x86_64/

Vagrant documentation: http://vagrantup.com/docs/base_boxes.html
Building a base box: https://gist.github.com/354734
[Creating base boxes for RHEL 4 and RHEL 5 - 80 GB dynamic disks]
[Note that there is no easy way to change disk sizes - but you can add more]

wsargent

[20:00:08] wsargent:framework git:(master*) $ ./build
Getting Scala 2.9.1 (for sbt)...

:: problems summary ::
:::: WARNINGS
		module not found: org.fusesource.jansi#jansi;1.4

	==== local: tried

	  /Users/wsargent/work/Play20/framework/./../repository/local/org.fusesource.jansi/jansi/1.4/ivys/ivy.xml

wsargent

[18:55:51] wsargent:framework git:(master*) $ ./build
Getting Scala 2.9.1 (for sbt)...

:: problems summary ::
:::: WARNINGS
		module not found: org.fusesource.jansi#jansi;1.4

	==== local: tried

	  /Users/wsargent/work/Play20/framework/./../repository/local/org.fusesource.jansi/jansi/1.4/ivys/ivy.xml