examples

Extremely random crap, much of which needs revisiting. Buyer beware. Note that there are some example tests in src/test/scala.

Also, I sometimes write blog posts on Scala.

starting a repl

Paul Phillips wrote this after becoming outraged by the awful unmaintainable shell alias I was using.

#!/usr/bin/env bash
#
 
set -e
 
pushd "$(mktemp -dt scalaz)"
cat >build.sbt <<EOM
scalaVersion := "2.11.6"

libraryDependencies ++= Seq(
  "org.scalaz" %% "scalaz-core" % "7.1.1",
  "org.scalaz" %% "scalaz-concurrent" % "7.1.1",
  "org.scalaz" %% "scalaz-effect" % "7.1.1"
)

initialCommands := "import scalaz._, Scalaz._"
EOM
 
sbt console
popd

random crap

I know nothing about shell scripting because I want to retain plausible deniability (shell scripting, installers, and crystal reports are the unholy trinity of bullshit you never want to admit you can do). Having said that, here are some very crappy scripts that I just wrote to improve my sanity.

List the packages contained in a jarfile

#!/bin/bash
jar tf $1 | grep class$ | perl -pe "s|/[^/]*class$||;s|/|.|g" | sort | uniq

Display the manifest

#!/bin/bash
unzip -p $1 META-INF/MANIFEST.MF

Edit the manifest in-place (note that this creates and destroys META-INF/MANIFEST.MF in the local dir ... really need to do this in /tmp or something).

#!/bin/bash
unzip $1 META-INF/MANIFEST.MF > /dev/null
mate -w META-INF/MANIFEST.MF
jar umf META-INF/MANIFEST.MF $1 2> /dev/null
rm META-INF/MANIFEST.MF
rmdir META-INF
echo "*** UPDATED TO"
unzip -p $1 META-INF/MANIFEST.MF