CCF/tla/download_or_update_tla.sh

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#!/bin/bash
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the Apache 2.0 License.
# Original License below
# Adapted from: https://github.com/pmer/tla-bin
#
# Downloads the TLA+ binary image (tla2tools.jar) from the Github
# servers. If the file already exists locally, checks for an update & prints a
# message if one was found.
#
download() {
if type curl > /dev/null 2>&1; then
download_curl "$1"
else
echo "Couldn't find curl" >&2
fi
}
download_curl() {
local if_modified
if [ -e tla2tools.jar ]; then
if_modified=(-z tla2tools.jar)
fi
curl -f -Ss -L -R -O "${if_modified[@]}" "$1"
if [ $? -ne 0 ]; then
echo "Couldn't download tla2tools.jar"
exit 1
fi
}
print_version() {
"$1" tlc2.TLC | grep Version | cut -d' ' -f3
}
main() {
echo "Downloading tla2tools.jar..."
before=$(date -r tla2tools.jar 2>/dev/null)
download https://github.com/tlaplus/tlaplus/releases/latest/download/tla2tools.jar
after=$(date -r tla2tools.jar 2>/dev/null)
if [ ! -e tla2tools.jar ]; then
echo "Couldn't download tla2tools.jar" >&2
exit 1
fi
if [ "$before" != "$after" ]; then
if [ -n "$before" ]; then
echo "Updated tla2tools.jar"
printf "New version: "
print_version tla2tools.jar
else
echo "Created tla2tools.jar"
fi
else
echo "No updates"
fi
}
main
# Original License
# Copyright 2017 Paul Merrill
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.