#! /bin/zsh
################################################################################
#
# ysh install script - G. Burgess (a/A Online JS-Py Week 3 assignment)
#
# NOTE: This is not 'done' - a good shell script needs to test the outcome of
#       any operation that might fail (which this one doesn't do. although I
#       started)  Shell scripts are much more than just a list of commands that
#       could be typed at the command prompt.  Unlike programming languages like
#       JavaScript and Python, the developer cannot expect that a failed
#       operation will cause an exception to be raised or execution to halt - so
#       any important code doing system-critical stuff needs to be appropriately
#       guarded.
#
################################################################################

YSH="$HOME/ysh"

if [[ -d "$YSH" ]] then
  echo "installation folder already exists; exiting..."
  exit 1
fi

echo "looks like we're doing this..."

YSH_ROOT="$YSH/home/root"
YSH_USER="$YSH/home/$USER"
YSH_BIN="$YSH/bin"

echo "creating directory tree..."
mkdir -p "$YSH_ROOT" "$YSH_USER" "$YSH_BIN"

echo "restricting root access..."
chmod a-w "$YSH_ROOT"
if (touch "$YSH_ROOT/test.sh" 2>/dev/null) then
  echo "root security compromised"
else
  echo "root security confirmed"
fi

echo "installing scripts..."
curl -o "$YSH_BIN/ysh_ls" "https://gist.githubusercontent.com/ATMartin/\
18dc07b9063e27e88f14216375045e17/raw/660d7fe270760c976d7334fd31dd0427045e88a4/\
mysh_ls"

echo "patching scripts..."
sed -iE 's/mysh/ysh/g' "$YSH_BIN/ysh_ls"

echo "all done!"

# here document to modify ~/.zshrc
# export PATH=~/ysh/bin:$PATH
# alias yls="ysh_ls"