#!/bin/sh
# Palmtop Link — one binary on the machine that stays awake.
#
#   curl -fsSL https://priorstates.com/palmtop/link/install.sh | sh
#
# Puts palmtop-link in /usr/local/bin (or ~/.local/bin without root), checks it
# against the published checksum, and tells you what to do next. It installs a
# program and nothing else: no service, no daemon, no cron entry, nothing that
# starts at boot. Read it before you pipe it anywhere — it is 40 lines.
set -eu
BASE="${PALMTOP_LINK_BASE:-https://priorstates.com/palmtop/link}"

os=$(uname -s | tr '[:upper:]' '[:lower:]')
arch=$(uname -m)
case "$arch" in x86_64|amd64) arch=amd64 ;; aarch64|arm64) arch=arm64 ;;
  *) echo "Palmtop Link has no build for $arch — build it from source: palmtop/link" >&2; exit 1 ;; esac
case "$os" in linux) name="palmtop-link-linux-$arch" ;; darwin) name="palmtop-link-macos-$arch" ;;
  *) echo "Palmtop Link has no build for $os — on Windows, download palmtop-link-windows-amd64.exe" >&2; exit 1 ;; esac

if [ -w /usr/local/bin ] 2>/dev/null; then dir=/usr/local/bin
elif [ "$(id -u)" = 0 ]; then dir=/usr/local/bin
else dir="$HOME/.local/bin"; fi
mkdir -p "$dir"

tmp=$(mktemp -d); trap 'rm -rf "$tmp"' EXIT
echo "Fetching $name…"
curl -fsSL "$BASE/$name" -o "$tmp/palmtop-link"
if curl -fsSL "$BASE/SHA256SUMS" -o "$tmp/SHA256SUMS" 2>/dev/null; then
  want=$(grep " $name\$" "$tmp/SHA256SUMS" | cut -d' ' -f1)
  got=$( (sha256sum "$tmp/palmtop-link" 2>/dev/null || shasum -a 256 "$tmp/palmtop-link") | cut -d' ' -f1)
  if [ -n "$want" ] && [ "$want" != "$got" ]; then
    echo "Checksum does not match what the site published — not installing." >&2; exit 1
  fi
  echo "Checksum ok."
fi
chmod +x "$tmp/palmtop-link"
mv "$tmp/palmtop-link" "$dir/palmtop-link"
echo "Installed $dir/palmtop-link"
case ":$PATH:" in *":$dir:"*) ;; *) echo "Note: $dir is not on your PATH." ;; esac
cat <<'NEXT'

Next, on your phone: Palmtop -> Alerts -> Add a server. Then here:

  palmtop-link enroll PT-XXXX-XXXX --name $(hostname)
  palmtop-link test

NEXT