The installation went easily for both ruby gems and ruby, but I decided to take a ’short cut’ and copy all my gems from /Library/Ruby/Gems into my /usr/local/lib directory which started raising all kinds of errors — this one, in particular was obnoxious.

[BUG] cross-thread violation on rb_gc()

Luckily, all that means is that I copied over gems which were compiled against the standard OSX ruby version and not the new one. This was a little script I wrote which will show you which gems need to be re-compiled. Just cd over to your /usr/local/lib/ruby/gems/1.8/gems directory and run:

gems $>ls -1 **/**/*.bundle|ruby -pe '$_.gsub! /\-.*/, ""'|uniq

to get a list, or pipe that into $> sudo gem install and that should clear up those gc issues.

If you’re curious to see which commands you use the most just run:

$>history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head

# local server
133 l
70 cd
47 svn
38 ..
29 e
26 mv
20 ll
10 rm
10 cp
8 ror

# remote server
123 l
74 cd
35 svn
31 touch
26 ..
23 exit
23 cat
20 ll
18 rm
16 rake

A few notes

here are those goofy aliases that you see:

alias ll='ls -lah'
alias la='ls -a'
alias l='ls -lh'
alias ..='cd ..'
alias ~='cd ~'
alias e='mate '

alias ss='./script/server'
alias console='./script/console'
alias migration='./script/migration'

alias ror='/var/rubydev'
alias www='/var/www'

And yes, this needs it own post simply for the fact that this is an insane prompt. Heres what it is/can do:

1. Automatically shortens itself if the path is longer than 18 charachters
   This is what I’ve always wanted since I usually name my folders after the website URL — and I HATE 2 line prompts.
2. Changes to red if the last command didn’t have a return code of 0
3. Includes your bash history # for easy history command repeating
4. Is pretty neat and trim

Why is this rad?

Prompt Madness!

I’ll let this image explain what it does and how it looks…

I’m tossing up a text file here -> best_bash_prompt_ever.txt — since the escaping will probably be messed up.

export PROMPT_COMMAND='PS1="\[\033[0;33m\][\!]\`if [[ \$? = "0" ]]; then echo "\\[\\033[32m\\]"; else echo "\\[\\033[31m\\]"; fi\`[\u.\h: \`if [[ `pwd|wc -c|tr -d " "` > 18 ]]; then echo "\\W"; else echo "\\w"; fi\`]\$\[\033[0m\] "; echo -ne "\033]0;`hostname -s`:`pwd`\007"'

Using pbcopy and pbpaste can save your life sometimes and are probably one programs I miss the most when using Linux. Anyway, heres just a simple “1 liner” for prepending.

cat FILE | pbcopy && echo "Prepend Text" > FILE && pbpaste >> FILE

Pretty simple, but it can be useful at times — like when you have a script that would be better off with a shebang line than being run by hand and you’re too lazy to open an editor.

Problem

Use Linux’s “find” command to hunt recursively through the current directory tree and find all matching files. While this is simple enough, I’m an idiot and tend to delete important files when drinking working too much — which we all know sucks. It would be nice to have it take all found files, tar them up and move it to the trash.

Solution

The evil, but oh-so-useful xargs command is your saving grace. While I hate using xargs its damn useful. If you take the output of find and pipe it into tar then pipe THAT into rm you get the job done.

Example

This is just a simple hack I’ve put together which seems to work and is relatively simple. (done as a bash function)

frm(){
	find . -name "$1" | xargs tar rvf "$1.tar" | xargs rm -rfv && mv $1.tar ~/.trash
}

I just needed this because I had to wipe all ./.svn directories so i just typed frm .svn and it created a .svn.tar and moved that to ~/.trash. Good stuff