Coder from Gallifrey: February 2014

A while back, long time ago, I made a post about Sublime Text Editor and apps for Mac that aid with programming environment.

Here on I am trying to fully integrate linux into my coding environment. Well when I say fully integrate, I mean explore more into its potential.

Well first I decided to mess around with the bash prompt on the terminal (I use iTerm2 on Mac) and here is the version so thus far (tested cloning a git directory and creating/adding/committing/pushing file):

and yes, I got a dragon on top of my terminal sprouting words of wisdom or silliness or non-sense:

Now to dive into my config file (.bash_profile on Mac and .bashrc on Ubuntu):

1:  fortune | cowsay -f dragon  
2:    
3:  # get current branch in git repo  
4:  function parse_git_branch() {  
5:    BRANCH=`git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`  
6:    if [ ! "${BRANCH}" == "" ]  
7:    then  
8:      STAT=`parse_git_dirty`  
9:      echo "[${BRANCH}${STAT}]"  
10:    else  
11:      echo ""  
12:    fi  
13:  }  
14:     
15:  # get current status of git repo  
16:  function parse_git_dirty {  
17:    status=`git status 2>&1 | tee`  
18:    dirty=`echo -n "${status}" 2> /dev/null | grep "modified:" &> /dev/null; echo "$?"`  
19:    untracked=`echo -n "${status}" 2> /dev/null | grep "Untracked files" &> /dev/null; echo "$?"`  
20:    ahead=`echo -n "${status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?"`  
21:    newfile=`echo -n "${status}" 2> /dev/null | grep "new file:" &> /dev/null; echo "$?"`  
22:    renamed=`echo -n "${status}" 2> /dev/null | grep "renamed:" &> /dev/null; echo "$?"`  
23:    deleted=`echo -n "${status}" 2> /dev/null | grep "deleted:" &> /dev/null; echo "$?"`  
24:    bits=''  
25:    if [ "${renamed}" == "0" ]; then  
26:      bits=">${bits}"  
27:    fi  
28:    if [ "${ahead}" == "0" ]; then  
29:      bits="*${bits}"  
30:    fi  
31:    if [ "${newfile}" == "0" ]; then  
32:      bits="+${bits}"  
33:    fi  
34:    if [ "${untracked}" == "0" ]; then  
35:      bits="?${bits}"  
36:    fi  
37:    if [ "${deleted}" == "0" ]; then  
38:      bits="x${bits}"  
39:    fi  
40:    if [ "${dirty}" == "0" ]; then  
41:      bits="!${bits}"  
42:    fi  
43:    if [ ! "${bits}" == "" ]; then  
44:      echo " ${bits}"  
45:    else  
46:      echo ""  
47:    fi  
48:  }  
49:     
50:  function nonzero_return() {  
51:    RETVAL=$?  
52:    # [ $RETVAL -ne 0 ] &&   
53:    echo "[$RETVAL]"  
54:  }  
55:     
56:     
57:  ############################################  
58:  # Modified from emilis bash prompt script  
59:  # from https://github.com/emilis/emilis-config/blob/master/.bash_ps1  
60:  #  
61:  # Modified for Mac OS X by  
62:  # @corndogcomputer  
63:  ###########################################  
64:  # Fill with minuses  
65:  # (this is recalculated every time the prompt is shown in function prompt_command):  
66:  fill="--- "  
67:     
68:  reset_style='\[\033[00m\]'  
69:  status_style=$reset_style'\[\033[00;90m\]' # gray color; use 0;37m for lighter color  
70:  prompt_style=$reset_style  
71:  command_style=$reset_style #'\[\033[1;29m\]'01; # black  
72:    
73:  # Prompt variable:  
74:  tt="\[\e[00;31m\][\[\e[m\]\[\e[00;31m\]\t\[\e[m\]\[\e[00;31m\]]\[\e[m\]"  
75:  uh="\[\e[00;32m\][\[\e[m\]\[\e[00;32m\]\u\[\e[m\]\[\e[00;37m\]@\[\e[m\]\[\e[00;34m\]\h\[\e[m\]\[\e[00;32m\]]\[\e[m\]"  
76:  wd="\[\e[00;34m\][\[\e[m\]\[\e[00;34m\]\w\[\e[m\]\[\e[00;34m\]]\[\e[m\]"  
77:  et="\[\e[00;35m\]\[\e[00;35m\]\`nonzero_return\`\[\e[m\]\[\e[m\]"  
78:  gt="\[\e[33m\]\`parse_git_branch\`\[\e[m\]"  
79:  pt="\[\e[00;32m\]\\$\[\e[m\]"  
80:  tag="$tt$wd$et$gt$pt"  
81:  PS1="$status_style"'$fill \t\n'"$prompt_style$tag$command_style "  
82:     
83:  # Reset color for command output  
84:  # (this one is invoked every time before a command is executed):  
85:  trap 'echo -ne "\033[0m"' DEBUG  
86:     
87:  function prompt_command {  
88:    # create a $fill of all screen width minus the time string and a space:  
89:    let fillsize=${COLUMNS}-9  
90:    fill=""  
91:    while [ "$fillsize" -gt "0" ]  
92:    do  
93:      fill="-${fill}" # fill with underscores to work on  
94:      let fillsize=${fillsize}-1  
95:    done  
96:    
97:    # If this is an xterm set the title to user@host:dir  
98:    case "$TERM" in  
99:    xterm*|rxvt*)  
100:      bname=`basename "${PWD/$HOME/~}"`  
101:      echo -ne "\033]0;${bname}: ${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007"  
102:      ;;  
103:    *)  
104:        ;;  
105:    esac  
106:  }  
107:     
108:  PROMPT_COMMAND=prompt_command

cowsay - basically ASCII creatures that think or say your message
fortune - fortune cookie sayings
3-48 - these functions are for bringing up git status in the prompt [ezprompt]
50-54 - this function is for bringing up error code in the prompt (error code 0 = success) [ezprompt + a bit of modification]
57-108 - bash prompt layout I found on emilis' git-page - but I modified it to include my color and content format

Helper sites:
ezprompt - helps with building the initial layout with color
jamiedubs - a nice introduction to bash prompt and various formats
colors - contains various options for text and colors
emilis - contains the config to place horizontal separators after execution of a bash command

next up tmux....