March 21, 2011

Command Line Ninja

This post was migrated from my old blog

Navigating maven projects (or any java project for that matter) on the command line can be an incredible pain. Package structures 8 or 10 levels deep aren’t that uncommon, especially in large enterprise level projects. Below are two hooks that I use to hop around that I find really useful.

showlevel (alias l=‘showlevel’)

:::perl
#!/bin/perl -w

my $pwd=`pwd`;

my @parts = split("/", $pwd);
my $level = (scalar(@parts)-1);
# Want to show which directory we are going to
$level--;

print $pwd;

my $last_index = 0;
my $index = 0;

while( $index != -1 && $level >= 1)
{
   $index = index($pwd, "/", $index);
   my $space = "";

   my $double_digit_level = 0;
   # Needs to be 8 because we print the spacer first
   if( $level > 8 )
   {
      $double_digit_level = 1;
   }

   for( $i=0; $i < ($index - $last_index)-1; $i++)
   {
      if($double_digit_level)
      {
         # When we print the double digit level, we need to
         # leave off on "spacer"
         $double_digit_level = 0;
      }
      else
      {
         $space.=".";
      }
  }

   if($index != -1)
   {
      print $space.$level;
      $last_index = $index;
      $index++;
      $level--;
   }
}

print "

“;

~/.profile or ~/.bashrc

:::bash
function k
{
   level=$1
   cdback=""
   for i in `seq 1 $level`
   do
      cdback=$cdback"../"
   done

   cd $cdback
}