Added installation scripts (mostly for Homebrew)

Signed-off-by: Fred Dushin <fred@dushin.net>

install.sh

@@ -0,0 +1,100 @@
+#!/bin/sh
+#
+# This file is part of AtomVM.
+#
+# Copyright 2023 Fred Dushin <fred@dushin.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
+#
+
+#
+# Install script for the packbeam utility.
+#
+# This script will install the packbeam utility in a given location
+# on the user's machine.  You must provide the prefix location for the
+# installation, in addition to the currently operative version, as
+# defined in the relx section of this project's rebar.config.
+#
+# Syntax: install.sh <prefix> <version>
+#     where <prefix> is the prefix location for the install
+#           <version> is the current release packbeam version
+#
+# This script will create a self-contained packbeam installation, including
+# ERTS as built for the target platform.  Effort is made to not conflict
+# with any other ERTS or Erlang installations already on the machine.
+#
+# After installation, users may run <prefix>/bin/packbeam on the
+# command line.  (Some installation tools will provide this automatically
+# in the user's PATH)
+#
+# Set the environemnt variable PACKBEAM_DEBUG to a non-empty string
+# to get diagnostic information about the installation.
+#
+
+set -e
+
+readonly root_dir="$(cd $(dirname $0) && pwd)"
+
+readonly nargs=$#
+if [[ ${nargs} -lt 2 ]]; then
+    echo
+    echo "Syntax: $0 <prefix> <version>"
+    echo "    where <prefix> is the prefix location for the install"
+    echo "          <version> is the current release packbeam version"
+    echo
+    exit 1
+fi
+readonly prefix="${1}"
+readonly version="${2}"
+
+if [ ! -e "${prefix}" ]; then
+    echo "ERROR! Prefix dir ${prefix} must exist!"
+    exit 1
+fi
+
+echo_run() {
+    local cmd="$@"
+    if [ -n "${PACKBEAM_DEBUG}" ]; then
+        echo "# $(date) [$(hostname)]> ${cmd}"
+    fi
+    ${cmd}
+}
+
+readonly src_tar="${root_dir}/_build/default/rel/atomvm_packbeam/atomvm_packbeam-${version}.tar.gz"
+if [ ! -e "${src_tar}" ]; then
+    echo "ERROR! It looks like atomvm_packbeam version ${version} has not been built!"
+    exit 1
+fi
+
+## unzip the archive (so that BSD tar can deal with it)
+readonly tmp_dir="$(mktemp -d /tmp/atomvm_packbeam.XXXXXX)"
+echo_run cp "${src_tar}" "${tmp_dir}/."
+echo_run gunzip "${tmp_dir}/atomvm_packbeam-${version}.tar.gz"
+
+readonly dest_dir="${prefix}/atomvm_packbeam"
+if [ -e "${dest_dir}" ]; then
+    echo "ERROR! It looks like ${dest_dir} already exists!"
+    exit 1
+fi
+
+echo_run mkdir -p "${dest_dir}"
+echo_run tar -C "${dest_dir}" -x -f "${tmp_dir}/atomvm_packbeam-${version}.tar"
+
+echo_run mkdir -p "${prefix}/bin"
+echo_run cp "${root_dir}/release/packbeam.in" "${prefix}/bin/packbeam"
+echo_run chmod 755 "${prefix}/bin/packbeam"
+
+echo_run rm -rf "${tmp_dir}"
+echo "atomvm_packbeam version ${version} installed in ${dest_dir}."

release/packbeam.in

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+#!/bin/sh
+#
+# This file is part of AtomVM.
+#
+# Copyright 2023 Fred Dushin <fred@dushin.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
+#
+
+readonly root_dir="$(cd $(dirname $0)/.. && pwd)"
+
+exec ${root_dir}/atomvm_packbeam/bin/packbeam "$@"