install.sh

#!/usr/bin/env bash

# Create helper to determine if our PS1 is installed
ps1_is_installed () {
  # If our prompt is being loaded, exit positively. Otherwise, negatively.
  [[ -n "$(bash --login -c 'echo $PS1' | grep 'get_git_info')" ]]
}

# If the PS1 already contains our current prompt, leave
ps1_is_installed && exit 0

# Add the .bash_prompt invocation to .bashrc
echo "# Adding ~/.bash_prompt to ~/.bashrc"
echo "# Run twolfson/sexy-bash-prompt" >> ~/.bashrc
echo ". ~/.bash_prompt" >> ~/.bashrc

# If our prompt is being loaded, leave
ps1_is_installed && exit 0

# By default, .bash_profile is our profile script
PROFILE_SCRIPT_SHORT="~/.bash_profile"
PROFILE_SCRIPT_FULL=~/.bash_profile

# Find which exists .bash_profile, .bash_login, or .profile
if [[ -f ~/.bash_profile ]]; then
  : # Use defaults
elif [[ -f ~/.bash_login ]]; then
  PROFILE_SCRIPT_SHORT="~/.bash_login"
  PROFILE_SCRIPT_FULL=~/.bash_login
elif [[ -f ~/.profile ]]; then
  PROFILE_SCRIPT_SHORT="~/.profile"
  PROFILE_SCRIPT_FULL=~/.profile
fi

# Add a bash invocation to the profile script
echo "# Adding ~/.bashrc triggers to $PROFILE_SCRIPT_SHORT"
echo "# Trigger ~/.bashrc commands" >> "$PROFILE_SCRIPT_FULL"
echo ". ~/.bashrc" >> "$PROFILE_SCRIPT_FULL"

# If our prompt is not being loaded, notify the user and leave angrily
ps1_is_installed || (echo "sexy-bash-prompt was added to ~/.bashrc \
and $PROFILE_SCRIPT_SHORT but is not being picked up by bash." 1>&2 && exit 1)