#!/bin/sh
# SiftMac's one-line install:  curl -fsSL https://siftmac.com/install.sh | sh
#
# Downloads SiftMac with curl, copies it into Applications and opens it. macOS only checks apps a
# browser marked as downloaded from the internet, and curl doesn't mark them, so SiftMac opens
# straight away instead of stopping at "SiftMac" Not Opened.
#
# It touches nothing but SiftMac.app and a temporary folder, which it deletes at the end.
# Everything runs inside main(), so a download of this script that breaks off halfway runs nothing.
set -eu

main() {
  say() { printf '%s\n' "$*"; }
  fail() { printf 'SiftMac: %s\n' "$*" >&2; exit 1; }

  [ "$(uname -s)" = Darwin ] || fail "SiftMac runs on macOS only."
  version=$(sw_vers -productVersion)
  [ "${version%%.*}" -ge 14 ] || fail "SiftMac needs macOS 14 or later. This Mac has macOS $version."
  if pgrep -xq SiftMac; then fail "SiftMac is open. Quit it (SiftMac › Quit SiftMac), then run this again."; fi

  # Applications if this account may write there, as admin accounts can; otherwise ~/Applications.
  dir=/Applications
  [ -w "$dir" ] || dir="$HOME/Applications"
  mkdir -p "$dir"

  tmp=$(mktemp -d "${TMPDIR:-/tmp}/siftmac.XXXXXX")
  trap 'hdiutil detach -quiet "$tmp/mnt" 2>/dev/null || true; rm -rf "$tmp"' EXIT
  trap 'exit 130' INT TERM

  say "Downloading SiftMac…"
  curl -fL --progress-bar -A "SiftMac-Install/1 (macOS $version)" -o "$tmp/SiftMac.dmg" https://siftmac.com/SiftMac.dmg \
    || fail "Couldn’t download SiftMac. Check your connection, then run this again."
  mkdir "$tmp/mnt"
  hdiutil attach -quiet -nobrowse -readonly -noautoopen -mountpoint "$tmp/mnt" "$tmp/SiftMac.dmg" \
    || fail "Couldn’t open the download. Run this again."
  [ -d "$tmp/mnt/SiftMac.app" ] || fail "The download has no SiftMac.app in it. Try again, or get it from siftmac.com/download."

  say "Installing in $dir…"
  rm -rf "$dir/SiftMac.app"
  ditto "$tmp/mnt/SiftMac.app" "$dir/SiftMac.app"
  # Nothing above marks it as downloaded; this makes sure an older copy's mark doesn't come along.
  xattr -dr com.apple.quarantine "$dir/SiftMac.app" 2>/dev/null || true

  say "Done. Opening SiftMac."
  open "$dir/SiftMac.app"
}

main "$@"