install

#!/usr/bin/env bash

STRAP_RELEASE_REF="${STRAP_RELEASE_REF:-}"
[ -z "$STRAP_RELEASE_REF" ] && STRAP_RELEASE_REF='master'

user_strap_dir="$HOME/.strap"
mkdir -p "$user_strap_dir"

releases_dir="$user_strap_dir/releases"
mkdir -p "$releases_dir"

file="$releases_dir/${STRAP_RELEASE_REF}.zip"
rm -rf "$file"

STRAP_RELEASE_URL="https://github.com/strapsh/strap/archive/${STRAP_RELEASE_REF}.zip"

if command -v wget >/dev/null; then
  wget -qO "$file" "$STRAP_RELEASE_URL"
elif command -v curl >/dev/null; then
  curl -fsSL "$STRAP_RELEASE_URL" -o "$file"
else
  echo "Neither wget nor curl are available.  Cannot download strap." >&2
  exit 1
fi

release_dir="$releases_dir/${STRAP_RELEASE_REF}"

rm -rf "$release_dir"
mkdir -p "$release_dir"

unzip-strip() {
    local zip="${1:-}" && [[ -z "$zip" ]] && { echo '$1 must be a zip file' >&2; return 1; }
    local dest="${2:-.}"
    local temp="$(mktemp -d 2>/dev/null || mktemp -d -t 'strap_dl_temp_dir')" && \
               unzip -q -d "$temp" "$zip" && mkdir -p "$dest" && \
               shopt -s dotglob && local f=("$temp"/*) && \
    if (( ${#f[@]} == 1 )) && [[ -d "${f[0]}" ]] ; then
        mv "$temp"/*/* "$dest"
    else
        mv "$temp"/* "$dest"
    fi && rm -rf "$temp"
}

unzip-strip "$file" "$release_dir"

rm -rf "$file"

rm -rf "$releases_dir/current"
ln -s "$release_dir" "$releases_dir/current"