| #!/bin/sh |
| |
| ############################################################################# |
| ## |
| ## Copyright (C) 2019 The Qt Company Ltd. |
| ## Contact: http://www.qt.io/licensing/ |
| ## |
| ## This file is part of the provisioning scripts of the Qt Toolkit. |
| ## |
| ## $QT_BEGIN_LICENSE:LGPL21$ |
| ## Commercial License Usage |
| ## Licensees holding valid commercial Qt licenses may use this file in |
| ## accordance with the commercial license agreement provided with the |
| ## Software or, alternatively, in accordance with the terms contained in |
| ## a written agreement between you and The Qt Company. For licensing terms |
| ## and conditions see http://www.qt.io/terms-conditions. For further |
| ## information use the contact form at http://www.qt.io/contact-us. |
| ## |
| ## GNU Lesser General Public License Usage |
| ## Alternatively, this file may be used under the terms of the GNU Lesser |
| ## General Public License version 2.1 or version 3 as published by the Free |
| ## Software Foundation and appearing in the file LICENSE.LGPLv21 and |
| ## LICENSE.LGPLv3 included in the packaging of this file. Please review the |
| ## following information to ensure the GNU Lesser General Public License |
| ## requirements will be met: https://www.gnu.org/licenses/lgpl.html and |
| ## http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
| ## |
| ## As a special exception, The Qt Company gives you certain additional |
| ## rights. These rights are described in The Qt Company LGPL Exception |
| ## version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
| ## |
| ## $QT_END_LICENSE$ |
| ## |
| ############################################################################# |
| |
| |
| # A helper script used for downloading a file from a URL or an alternative |
| # URL. Also the SHA is checked for the file (SHA algorithm is autodetected |
| # based on the SHA length). Target filename should also be given. |
| |
| ############################ BOILERPLATE ############################### |
| command -v sha1sum >/dev/null || alias sha1sum='shasum -a 1' |
| command -v sha256sum >/dev/null || alias sha256sum='shasum -a 256' |
| command -v sha384sum >/dev/null || alias sha384sum='shasum -a 384' |
| command -v sha512sum >/dev/null || alias sha512sum='shasum -a 512' |
| ######################################################################## |
| |
| |
| Download () { |
| url="$1" |
| targetFile="$2" |
| |
| command -v curl >/dev/null \ |
| && curl --fail -L --retry 5 --retry-delay 5 -o "$targetFile" "$url" \ |
| || wget --tries 5 -O "$targetFile" "$url" |
| } |
| |
| VerifyHash () { |
| file=$1 |
| expectedHash=$2 |
| |
| if [ ! -f "$file" ] |
| then return 2 # file does not exist |
| fi |
| |
| |
| hashLength="$(echo "$expectedHash" | wc -c | sed 's/ *//g')" |
| # Use backticks because of bug with bash-3 (default on macOS), |
| # caused when there are unbalanced parentheses inside $() |
| # shellcheck disable=SC2006 |
| hash=`case "$hashLength" in |
| 41) sha1sum "$file" ;; |
| 65) sha256sum "$file" ;; |
| 97) sha384sum "$file" ;; |
| 129) sha512sum "$file" ;; |
| *) echo "FATAL! Unknown hash length: $hashLength" 1>&2 && exit 1 ;; |
| esac | cut -d ' ' -f 1` |
| |
| if [ ! "$expectedHash" = "$hash" ] |
| then |
| echo "FAIL! wrong file hash: $file $hash" 1>&2 |
| return 1 |
| fi |
| echo "OK verified integrity of: $file" |
| } |
| |
| # Check if file already exists and is good, otherwise download it |
| DownloadURL () { |
| url=$1 |
| url2=$2 |
| expectedHash=$3 |
| # Optional argument $4: destination filename |
| if [ x"$4" = x ] |
| then |
| # defaults to the last component of $url |
| targetFile=$(echo $url | sed 's|^.*/||') |
| else |
| targetFile=$4 |
| fi |
| |
| if VerifyHash "$targetFile" "$expectedHash" |
| then |
| echo "Skipping download, found and validated existing file: $targetFile" |
| else |
| echo "Downloading from primary URL: $url" |
| if ! Download "$url" "$targetFile" |
| then |
| echo "FAIL! to download, trying alternative URL: $url2" 1>&2 |
| if ! Download "$url2" "$targetFile" |
| then |
| echo 'FAIL! to download even from alternative URL' 1>&2 |
| return 1 |
| fi |
| fi |
| VerifyHash "$targetFile" "$expectedHash" |
| fi |
| } |