meebis 0.15.0

A fast, disposable, in-memory Redis-compatible server for ephemeral dev work
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#!/usr/bin/env bash
# asdf: fetch a release into $ASDF_DOWNLOAD_PATH, ready for bin/install.
#
# Splitting download from install is what lets asdf cache and retry the network
# half on its own; this script does the fetching and the checksum, and leaves a
# plain `meebis` binary behind for the other half to place.
set -euo pipefail

. "$(dirname "$0")/lib.sh"

[ "${ASDF_INSTALL_TYPE:-version}" = "version" ] ||
  fail "only released versions can be installed, not refs — build from source with cargo instead"

version="${ASDF_INSTALL_VERSION:?ASDF_INSTALL_VERSION is not set}"
dest="${ASDF_DOWNLOAD_PATH:?ASDF_DOWNLOAD_PATH is not set}"
triple="$(target_triple)"
archive="meebis-${triple}.tar.xz"
url="$REPO/releases/download/v${version}/${archive}"

tmp="$(mktemp -d)"
trap 'rm -rf "$tmp"' EXIT

echo "meebis: downloading $url"
fetch "$url" "$tmp/$archive" ||
  fail "could not download v${version} for ${triple} — check that the version exists at $REPO/releases"

# The release carries a checksum next to every archive, so there is no reason
# to install an artifact without confirming it arrived intact.
if fetch "$url.sha256" "$tmp/$archive.sha256" 2>/dev/null; then
  want="$(cut -d' ' -f1 <"$tmp/$archive.sha256")"
  got="$(sha256_of "$tmp/$archive")"
  [ "$want" = "$got" ] || fail "checksum mismatch for $archive (expected $want, got $got)"
else
  echo "meebis: warning: no published checksum for $archive — installing unverified" >&2
fi

# The archive wraps everything in a meebis-<triple>/ directory; strip it so the
# binary lands directly in the download path.
mkdir -p "$dest"
tar -xJf "$tmp/$archive" -C "$dest" --strip-components=1 ||
  fail "could not extract $archive (is xz support available to tar?)"

[ -f "$dest/meebis" ] || fail "the archive did not contain a meebis binary"