realm-js/scripts/download-core.sh

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#!/bin/bash
set -e
set -o pipefail
# Set to "latest" for the latest build.
: ${REALM_CORE_VERSION:=1.4.0}
if [ "$1" = '--version' ]; then
echo "$REALM_CORE_VERSION"
exit 0
fi
# The 'node' argument will result in realm-node build being downloaded.
if [ "$1" = 'node' ]; then
CORE_DIR="core-node"
if [ "$(uname)" = 'Darwin' ]; then
CORE_DOWNLOAD_FILE="realm-core-node-osx-$REALM_CORE_VERSION.tar.gz"
else
CORE_DOWNLOAD_FILE="realm-core-node-linux-$REALM_CORE_VERSION.tar.gz"
fi
else
CORE_DIR='core'
CORE_DOWNLOAD_FILE="realm-core-$REALM_CORE_VERSION.tar.xz"
fi
# Start current working directory at the root of the project.
cd "$(dirname "$0")/.."
die() {
echo "$@" >&2
exit 1
}
download_core() {
echo "Downloading dependency: $CORE_DIR $REALM_CORE_VERSION"
local TMP_DIR="${TMPDIR:-/tmp}/core_bin"
local CORE_TAR="$TMP_DIR/$CORE_DOWNLOAD_FILE"
local CORE_TMP_TAR="$CORE_TAR.tmp"
mkdir -p "$TMP_DIR"
if [ ! -f "$CORE_TAR" ]; then
curl -f -L -s "https://static.realm.io/downloads/core/$CORE_DOWNLOAD_FILE" -o "$CORE_TMP_TAR" ||
die "Downloading $CORE_DIR failed. Please try again once you have an Internet connection."
mv "$CORE_TMP_TAR" "$CORE_TAR"
else
echo "Using cached $CORE_DIR from TMPDIR"
fi
(
cd "$TMP_DIR"
rm -rf "$CORE_DIR"
tar -xzf "$CORE_TAR"
mv core "$CORE_DIR-$REALM_CORE_VERSION"
)
rm -rf "$CORE_DIR-$REALM_CORE_VERSION" "$CORE_DIR"
mv "$TMP_DIR/$CORE_DIR-$REALM_CORE_VERSION" .
ln -s "$CORE_DIR-$REALM_CORE_VERSION" "$CORE_DIR"
}
check_release_notes() {
grep -Fqi "$REALM_CORE_VERSION RELEASE NOTES" "$@"
}
if [ ! -e "$CORE_DIR" ]; then
download_core
elif [ -d "$CORE_DIR" -a -d ../realm-core -a ! -L "$CORE_DIR" ]; then
# Allow newer versions than expected for local builds as testing
# with unreleased versions is one of the reasons to use a local build
if ! check_release_notes "$CORE_DIR/release_notes.txt"; then
die "Local build of core is out of date."
else
echo "The core library seems to be up to date."
fi
elif [ ! -L "$CORE_DIR" ]; then
echo "$CORE_DIR is not a symlink. Deleting..."
rm -rf "$CORE_DIR"
download_core
# With a prebuilt version we only want to check the first non-empty
# line so that checking out an older commit will download the
# appropriate version of core if the already-present version is too new
elif ! grep -m 1 . "$CORE_DIR/release_notes.txt" | check_release_notes; then
download_core
else
echo "The core library seems to be up to date."
fi