vsbabu.org

Remove duplicate jars

Often you will find that you’ve multiple versions of the same dependency jars in your WEB-INF/lib or your classpath directories when you are merging multiple modules. This small shell script can be run on those directories to get rid of older versions of the same jar.

#!/bin/bash
#in a directory full of jar files, it is common to have multiple
#versions of the same jars. If versions are named with only periods
#and alphanumerics, then this groups the jars by the name, deletes
#all the lesser versions

#get a list of jars like x-1.0.0.RELEASE.jar, get only the jar name
#without version or .jar and get only non unique lines (ie., duplicate
#jars are found)
for PREFIX in `ls *.jar|sed  ’s/-[0-9\.a-zA-Z]*\.jar//g'|uniq -d`; do
    echo $PREFIX
    #now do a reverse sorted listing with the jar name and remove the
    #top line so that non latest versions are returned
    for FILE in `ls -r ${PREFIX}*|sed '1d'`; do
        echo "  $FILE"
        rm -f $FILE
    done
done

August 21, 2011

Quick Ref: Linux Mint 11 #1

To force a filesystem check on root filesystem on next reboot, do:

sudo touch /forcefsck

To restore the gnome panel to defaults:

gconftool-2 --shutdown
rm -rf ~/.gconf/apps/panel
pkill gnome-panel

If clicking on any file location from say google chrome download list or other links gives an error the requested location is not a folder:

sudo apt-get remove exo-utils

August 17, 2011

Quick Ref: SVN command line

#make a working dir
mkdir sandbox
cd sandbox
#checkout
svn co svn://svn-repo-machine/repo/path myproject --username myusernameatsvnserver
#go to work on items
cd myproject
#pull latest from server
svn up 
#queue a file for addition
svn add newfile.c
#queue for deletion
svn delete anoldfilewedontneed.c 
#get the info on what is different in your local vs server
svn status 
#list commit comments on a file
svn log AFILESOMEONECHANGED.c 
#commit one file. * will commit all that changed.
svn ci -m "Edited this file for ..." filethatgotchanged.c 

Now, configure vim as the svn diff tool.

August 14, 2011

Git with Dropbox

First, check out Git for personal use. Extending those principles to Dropbox is fairly easy.

 
cd ~/Dropbox
mkdir -p gitroot/research.git && cd !$
git --bare init
 
cd ~/Projects
git init
git remote add dropbox file://$HOME/Dropbox/gitroot/research.git
git add testfile.txt
git commit -m "initial"
git push dropbox master
 
ssh anothercomputer
cd ~/Projects
git clone -o dropbox file://$HOME/Dropbox/gitroot/research.git
cd research
ls >> testfile.txt
git commit -m "just testing"
git push dropbox master
git pull dropbox master

For the first computer, once you fill the bare repo with some stuff, you can delete the folder and do a clone like how you did with the second computer.

August 02, 2011

Quick Start: Git for personal use

Problem: Needed to find a way to keep my config and research files under version control which I can get to various machines I work with and update from anywhere.

• I have an OpenBSD server account (no root though)
• I don’t want to run any additional daemon process or expose it via http
• I can download and compile source if it can be installed as a non root account
• Transport must be via SSH
• I don’t need GUI tools, speed should be reasonable

Tried Mercurial, Darcs, Bazaar and Git. Fossil is also a great tool that provides wiki, version control and ticket management. Darcs is the easiest, but for some reason, extremely slow. Finally chose Git. Download and compile was easy. Read top 3 lines in the INSTALL file in source distribution for steps. Rest of the steps explain how I set it up. Note that this may not be the best possible Git workflow. Merely that it works for me. Note that I’ve installed git in ~/software/git.

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July 30, 2010

Quick script to maintain a diary

I like to keep my daily notes in a folder in the filesystem with filenames yyyymmdd.otl, using VIM Outliner. Here is a small DOS script to make a file for a day if it doesn’t exist and then open it. Name it as diary.cmd and keep in your path.

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