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b018b841c1
Sometimes we pre-create the target filename using mktemp. In that case of course the hash will not match, so avoid comparing. Change-Id: Id0feb0178d659e03f5ceb000f738167cdc28a3ec Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>
127 lines
4.4 KiB
Bash
Executable File
127 lines
4.4 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 || sha1sum () { shasum -a 1 "$@" ; }
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command -v sha256sum >/dev/null || sha256sum () { shasum -a 256 "$@" ; }
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command -v sha384sum >/dev/null || sha384sum () { shasum -a 384 "$@" ; }
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command -v sha512sum >/dev/null || sha512sum () { shasum -a 512 "$@" ; }
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########################################################################
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Download () {
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url="$1"
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targetFile="$2"
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command -v curl >/dev/null \
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&& curl --fail -L --retry 5 --retry-delay 5 -o "$targetFile" "$url" \
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|| wget --tries 5 -O "$targetFile" "$url"
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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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# Optional argument $4: destination filename
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if [ x"$4" = x ]
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then
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# defaults to the last component of $url
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targetFile=$(echo $url | sed 's|^.*/||')
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else
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targetFile=$4
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fi
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# If a non-empty file already exists
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if [ -s "$targetFile" ]
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then
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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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return
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else
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echo "WARNING: Non-empty but different file found at destination; will re-download and overwrite file: $targetFile"
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fi
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fi
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echo "Downloading from primary URL: $url"
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if ! Download "$url" "$targetFile"
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then
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echo "FAIL! to download, trying alternative URL: $url2" 1>&2
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if ! Download "$url2" "$targetFile"
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then
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echo 'FAIL! to download even from alternative URL' 1>&2
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return 1
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fi
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fi
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VerifyHash "$targetFile" "$expectedHash"
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}
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