get-latest-release.sh

#! /usr/bin/env nix-shell
#! nix-shell -i bash -p curl gnused
set -eo pipefail

if false ; then
  c=.cache-grapheneos-releases-html
  if [ -e "$c" ] ; then
    c2="-z $c"
  else
    c2=""
  fi
  if ! curl https://grapheneos.org/releases $c2 -o $c --silent -L ; then
    echo "Couldn't dowmload GrapheneOS release page!" >&2
    exit 1
  fi
  x="$(sed -n 's_.*<a href=https://releases[.]grapheneos[.]org/bluejay-factory-\([-a-z0-9A-Z_]*\)[.]zip>.*_\1_p' <$c)"
  if [[ "$x" == +([-0-9a-zA-Z_]) ]] ; then
    echo "$x"
  else
    echo "Couldn't find bluejay release in release page!" >&2
    exit 1
  fi
else
  # four fields: release tag, timestamp, device name, channel -> we want the first one
  # -> Replace everything after the first special char, which also sanitizes the tag name.
  # (and we don't cache this because the normal response is as small as the "304 not modified" would be)
  curl -sL https://releases.grapheneos.org/bluejay-stable | sed 's/[^a-zA-Z0-9_].*//'
fi