20 Clojure Links To Get You Up To Speed 6

Posted by Matt Sears on Saturday June, 06 2009

Writing multi-threaded code is hard. If you've ever done concurrent programming, you'll probably agree. Clojure offers a compelling alternative to traditional object-oriented approaches to programming and has garnered much attention from the Ruby community because of it's elegant design that lets you get right to the essence of a problem.

What is Clojure?

Simply put, Clojure is a functional programming language for the Java Virtual Machine with several powerful features for building concurrent applications. In addition, Clojure is fast, robust, and a powerful general-purpose programming language. A dialect of Lisp, Clojure embraces traditional code-as-data philosophy and a powerful macro system, plus some syntactic sugar tailored to Java.

Now that version 1.0 is out and Stuart Halloway's new book Programming Clojure just dropped, I've rounded up some of the best articles and tutorials on Clojure to you get you up to speed quickly.

Tutorials and Links

Screencasts, Videos, and Presentations

Tools and Setup

Documentation

Tags: clojure, code
Meta: 6 comments, permalink

Quick git add, commit, push, and deploy 0

Posted by Matt Sears on Monday August, 11 2008

Last week, I was preparing a presentation and found myself doing a lot of quick fixes and deployments to prepare a web application for a demonstration. I thought instead of running the following four commands each time:

git add .
git commit -a -m 'A description of the change'
git push
cap production deploy

It would be nice if I could do all of the above with just one command. So I created this shell script:

push() {

  # Defaults
  MINLEN=25
  DIRTY=false
  DEPLOY="production deploy"
  REMOTE_REPO = "origin master"

  # Check if we have any untracked files
  if git status | grep -q "modified:"
  then
     DIRTY=true
  fi

  # Make sure there is a message with the commit
  if [ -z "$1" ] && (test $DIRTY == true)
  then
    echo "You must specify a message with your commit"
    return
  elif [ ${#1} -lt $MINLEN ] && (test $DIRTY == true)
  then
    echo "Your message must have at least $MINLEN letters."
  return
  fi

  # Commit all the changes by default
  if (test $DIRTY == true)
  then
     echo "Adding new files to Git repository"
     git add .

     echo "Commiting to local Git repository"
     git commit -a -m "$1"

     # Push changes if a remote repository exists
     if git remote | grep -q "origin"
     then
        echo "Pushing changes to remote repository"
        git push $REMOTE_REPO
     fi
  fi

  # Deploy changes via Capistrano
  if ls | grep -q Capfile
  then
     cap $DEPLOY
  fi
}

The 'push' function will first check to make sure you supplied a description if any recent changes were made. Second, it will commit all the code and push it to the remote repository (if one exists).

If none of the code was modified or added, it will skip the Git commands and simply run the Capistrano deploy command and not require a description for the changes.

To use this script, copy and paste the above function to the end of your ~/.bash_profile file. To run it, simply run the 'push' command.

push "The description for the committed changes."

That's it! All the code is added, commited, pushed, and deployed.

Tags: capistrano, code, git
Meta: 0 comments, permalink