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c0fce7a3b3
Auto-detects and verifies all kinds of hashes, not only SHA1. Hash verification is now an autonomous function. If the file is found at the destination, skip redownloading it if the hash is OK. Runs on POSIX sh, not requiring bash. Retain compatibility with previous version. Change-Id: I9930336030aa776f49dc460fe766f3e831700255 Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>
102 lines
3.8 KiB
Bash
Executable File
102 lines
3.8 KiB
Bash
Executable File
#!/bin/sh
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#############################################################################
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##
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## Copyright (C) 2019 The Qt Company Ltd.
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## Contact: http://www.qt.io/licensing/
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##
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## This file is part of the provisioning scripts of the Qt Toolkit.
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##
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## $QT_BEGIN_LICENSE:LGPL21$
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## Commercial License Usage
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## Licensees holding valid commercial Qt licenses may use this file in
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## accordance with the commercial license agreement provided with the
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## Software or, alternatively, in accordance with the terms contained in
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## a written agreement between you and The Qt Company. For licensing terms
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## and conditions see http://www.qt.io/terms-conditions. For further
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## information use the contact form at http://www.qt.io/contact-us.
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##
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## GNU Lesser General Public License Usage
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## Alternatively, this file may be used under the terms of the GNU Lesser
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## General Public License version 2.1 or version 3 as published by the Free
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## Software Foundation and appearing in the file LICENSE.LGPLv21 and
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## LICENSE.LGPLv3 included in the packaging of this file. Please review the
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## following information to ensure the GNU Lesser General Public License
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## requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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## http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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##
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## As a special exception, The Qt Company gives you certain additional
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## rights. These rights are described in The Qt Company LGPL Exception
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## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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##
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## $QT_END_LICENSE$
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##
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#############################################################################
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# A helper script used for downloading a file from a URL or an alternative
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# URL. Also the SHA is checked for the file (SHA algorithm is autodetected
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# based on the SHA length). Target filename should also be given.
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############################ BOILERPLATE ###############################
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command -v sha1sum >/dev/null || alias sha1sum='shasum -a 1'
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command -v sha256sum >/dev/null || alias sha256sum='shasum -a 256'
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command -v sha384sum >/dev/null || alias sha384sum='shasum -a 384'
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command -v sha512sum >/dev/null || alias sha512sum='shasum -a 512'
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########################################################################
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VerifyHash () {
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file=$1
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expectedHash=$2
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if [ ! -f "$file" ]
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then return 2 # file does not exist
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fi
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hashLength="$(echo "$expectedHash" | wc -c | sed 's/ *//g')"
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# Use backticks because of bug with bash-3 (default on macOS),
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# caused when there are unbalanced parentheses inside $()
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# shellcheck disable=SC2006
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hash=`case "$hashLength" in
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41) sha1sum "$file" ;;
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65) sha256sum "$file" ;;
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97) sha384sum "$file" ;;
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129) sha512sum "$file" ;;
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*) echo "FATAL! Unknown hash length: $hashLength" 1>&2 && exit 1 ;;
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esac | cut -d ' ' -f 1`
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if [ ! "$expectedHash" = "$hash" ]
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then
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echo "FAIL! wrong file hash: $file $hash" 1>&2
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return 1
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fi
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echo "OK verified integrity of: $file"
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}
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# Check if file already exists and is good, otherwise download it
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DownloadURL () {
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url=$1
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url2=$2
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expectedHash=$3
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targetFile=$4
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if VerifyHash "$targetFile" "$expectedHash"
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then
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echo "Skipping download, found and validated existing file: $targetFile"
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else
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echo "Downloading from primary URL: $url"
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if ! curl --fail -L --retry 5 --retry-delay 5 -o "$targetFile" "$url"
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then
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echo "FAIL! to download, trying alternative URL: $url2" 1>&2
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if ! curl --fail -L --retry 5 --retry-delay 5 -o "$targetFile" "$url2"
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then
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echo 'FAIL! to download even from alternative url' 1>&2
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return 1
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fi
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fi
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VerifyHash "$targetFile" "$expectedHash"
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fi
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}
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