No One Is Perfect

A reluctant foray into the world of blogging.

Posts Tagged sass

RubyGems in a JAR

Aug 20

Posted by Tom in Software Development | No Comments

On a few projects now I’ve used jruby with rake. I know that I can use rvm and just fetch the gems per project, but for developers stuck on windows that way is a little more than difficult. So here’s how I package up rubygems in a JAR.

#!/bin/bash
mkdir gemjar
java -jar jruby-complete-1.6.3.jar -S gem install -i ./gemjar haml --version 3.1.2 --no-rdoc --no-ri
java -jar jruby-complete-1.6.3.jar -S gem install -i ./gemjar net-scp --version 1.0.4 --no-rdoc --no-ri
java -jar jruby-complete-1.6.3.jar -S gem install -i ./gemjar jruby-openssl --version 0.7.4 --no-rdoc --no-ri
java -jar jruby-complete-1.6.3.jar -S gem install -i ./gemjar fpm --version 0.3.7 --no-rdoc --no-ri
jar cf ruby-gems.jar -C gemjar .
rm -rf gemjar

You then invoke jruby rake via:

#!/bin/bash
java -jar jruby-complete-1.6.3.jar -rruby-gems.jar -S rake build.rb $@

This means that you can then invoke the following useful little nuggets:

task :list_gems do
  require "rubygems/gem_runner"
  Gem::GemRunner.new.run ["list"]
end

task :sass_watch do
  require 'haml'
  require 'haml/exec'
  opts = Haml::Exec::Sass.new ['--watch', 'src/main/sass:src/main/webapp/static/css']
  opts.parse!
end

task :ssh_copy, :file do |t, args|
  require "net/ssh"
  require "net/scp"
  Net::SSH.start("repository.remote", "user") do |ssh|
    ssh.scp.upload!(args.file, "/tmp/files/")
  end
end

task :make_rpm => :make_war do
  fail "Please install rpm-build to make RPMs!" unless system("rpmbuild --version")

  require "fpm"
  require "fpm/program"
  exit_code = FPM::Program.new.run([
    "-s", "dir", "-t", "rpm", "-n", APPLICATION_NAME, "-v", RPM_VERSION_NUMBER, "-a", "all",
    "--post-install", "target/rpmbuild/opt/application/bin/post_install.sh",
    "--pre-uninstall", "target/rpmbuild/opt/application/bin/pre_uninstall.sh",
    "-C", "target/rpmbuild", "opt"
  ])

  fail "Build failed" if exit_code != 0
end

How awesome is this?

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Post-Redirect-Get in Rails

Mar 11

Posted by Tom in My Code, Software Development | 1 Comment

For a while now I’ve been flying the flag for using a post-redirect-get design pattern when writing web applications. In my opinion the current crop of web frameworks still make it very easy to do the “bad” thing since to do PRG properly you need to think what kind of an interaction you want with users and not cop out saying its technically very difficult in <insert framework here>. If you resort to ActiveX controls, popups without navigation bars and/or weird javascript hacks to stop users from clicking refresh or back buttons then perhaps you should have written a better web application.

Whenever I play with Rails, or for that matter any other web framework, I get stuck on trying to find a problem to solve (or a set of requirements). Fortunately the Agile Development with Rails book from the Pragmatic Programmers has a nice little bookstore application that I can develop iteratively. I’ve put my latest adaptation of their depot application to use post-redirect-get (even works with ActiveResource scaffolds), UUIDs as ActiveRecord primary keys, HAML, SASS and RSpec on GitHub. Feedback is always welcome.

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