bb_uninstall_biobash

#!/usr/bin/env bash
#
# Uninstalls BIOBASH.
#
source $BIOBASH_LIB/shml/shml.sh


#--------------------------------------------------------------------
#                             FUNCTIONS
#--------------------------------------------------------------------
# This pice of code was taken from: 
#  https://unix.stackexchange.com/questions/108873/removing-a-directory-from-path
# A response from: https://unix.stackexchange.com/users/1655/amphetamachine
remove_from_path(){

    echo "Removing $1 from PATH."
    dir_to_remove=$1
    PATH=:$PATH:
    while [[ $PATH = *":$dir_to_remove:"* ]]; do
        PATH=${PATH//":$dir_to_remove:"/:}
    done
    # Trim off ":" from the beginning and end.
    PATH=${PATH#:}
    PATH=${PATH%:}
}



echo "
"

echo "
$(hr)
$(emoji fire) $(attribute bold)You are about to UNINSTALL BioBash from your system.$(attribute end) $(emoji fire)
$(hr)

  If you decide to continue, the following directory: 

  $(attribute invert) $BIOBASH_HOME $(attribute end)

  and all its contents will be $(attribute bold)completely erased$(attribute end).

  Your .bashrc file will be also edited and all variables that were appended to it
  during BioBash installation will be erased. This is a safe procedure and your bashrc file
  will still hold all other configurations.
"
#Flow control. Answer should be "y" or "n"
continue=0
until [ $continue  == "y" ] || [ $continue == "n" ]
do
    read -p 'Proceed? [y/n]: ' continue
done

if [[ $continue == "n" ]]; then
    
    echo "
    $(emoji =p) Good decision! BioBash Rocks!!!!.
    
    Nothing done. Keep enjoying BioBash.
    
    "
    exit 0
    
elif [[ $continue == "y" ]];then

    #################################################################
    #
    #  ACTUALLY REMOVING BIOBASH
    #
    #################################################################
    # Before removing BIOBASH_HOME clean path. Since installation appends BB install dir to
    # PATH after several installs it is cluttered.

    echo " 
$(emoji check) Cleaning up PATH: 
    "
    remove_from_path "$BIOBASH_HOME"
    remove_from_path "$BIOBASH_BIN"
    remove_from_path "$BIOBASH_BIN_OS"

    # Edit bashrc file
    # This line of code will erase anything between #BIOBASH-BEGIN and #BIOBASH-END
    # tags.
    sed -ie "/^#BIOBASH-BEGIN/,/^#BIOBASH-END/d" ~/.bashrc

    echo "
$(emoji check) Removing: $BIOBASH_HOME"
    rm -Rf $BIOBASH_HOME
    
    #Check that directory was actually removed from system.
    #-e means directory exist
    if [[ -e $BIOBASH_HOME ]];then
    
        echo "Unable to erase $BIOBASH_HOME.
        Are you sure you have the right permissions to perform this action?
        
        Unisntalling was NOT succesful."
        exit 1
        
    elif [[ ! -e $BIOBASH_HOME ]];then
        echo "
        Uninstall was succesful. Thank you for using BioBash
        Bye. $(emoji wave)
    
        "
        exit 0
    else
        echo "[UNKNOWN UNINSTALL ERROR CODE 1]
        "
    exit 1
    fi
else
    
    echo "[UNKNOWN UNINSTALL ERROR CODE 2]
    "
    exit 1
fi