Bash snippet to display RVM gemset and ruby information, and git status

rvmgitinfo.sh

# Based on script at http://snipplr.com/view/36724/ , modified to be more like the default shell prompt

function detect_rvm_version {
local gemset=$(echo $GEM_HOME | awk -F'@' '{print $2}')
[ "$gemset" != "" ] && gemset="@$gemset"
local version=$(echo $MY_RUBY_HOME | awk -F'-' '{print $2}')
[ "$version" != "" ] && version="$version"
local full="$version$gemset"
[ "$full" != "" ] && echo "$full"
}
 
function detect_git_dirty {
local git_status=$(git status 2>&1 | tail -n1)
[[ $git_status != "fatal: Not a git repository (or any of the parent directories): .git" ]] && [[ $git_status != "nothing to commit (working directory clean)" ]] && echo "*"
}
 
function detect_git_branch {
 local branch=$(git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/\1/")
 if [[ $branch = "" ]]
 then
   echo $branch
 else
   echo " $branch"
 fi
}
 
function dev_info {
info="$(detect_rvm_version)$(detect_git_branch)$(detect_git_dirty)"
  if [[ $info = "" ]]
  then
echo "";
  else
echo " [$info]"
  fi
}
 
# Colors
txtred='\e[0;31m' # Red
txtwht='\e[0;37m' # White
txtrst='\e[0m' # Text Reset

export GIT_DISCOVERY_ACROSS_FILESYSTEM=true
# Custom command prompt
export PS1="\u@\h \[$txtwht\]\w\[$txtred\]\$(dev_info)\[$txtrst\]\$ "
 
# If you don't have colors, use something like this instead:
# export PS1="\w \$(dev_info) "