#! /usr/bin/env bash

path=$1/bin
tag="<sh-elf-gcc>"

# Check whether there is already such a binutils in the PATH

existing=$(which sh-elf-gcc)
rc=$?

if [[ $rc == 0 && "$existing" != "$path/sh-elf-gcc" ]]; then
  echo "$tag WARNING: there seems to be another sh-elf-gcc in the PATH, be careful!" >&2
fi

if [[ $rc == 0 && "$existing" == "$path/sh-elf-gcc" ]]; then
  echo "$tag This build is already in the PATH, there is nothing to do." >&2
  exit 0
fi

# Try to find a suitable default

default="$HOME/.profile"
candidates="$HOME/.zprofile $HOME/.profile $HOME/.bash_profile $HOME/.zshrc $HOME/.bashrc"

for c in $candidates; do
  if [[ -f $c ]]; then
    default=$c
    break
  fi
done

# Suggest to add the path to binaries to the PATH at startup

cat <<EOF
===============================================================================
sh-elf-gcc has been compiled but is not in the PATH, so it can't be used yet.
I can add this line to your profile to update the PATH when you log in:

export PATH="\$PATH:$path"

* Press Enter to add this line to $default
* Or type "-" to skip this step
* Or type in another file name
EOF

read -p "> " startup_file
[[ -z "$startup_file" ]] && startup_file=$default

if [[ "$startup_file" == "-" ]]; then
  echo "$tag Skipped setting the PATH."
else
  echo "export PATH=\"\$PATH:$path\"" >> $startup_file
  echo "$tag Set the PATH in $startup_file, this will take effect next login."
fi