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137a747c58
When the catch all is hit the exit statement only returns from the case statement. Remove the exit statement. Check that some sha was returned, otherwise empty input sha will result in empty calculated sha, which causes false positive sha check. Pick-to: 6.7 Change-Id: Iddb9562cf7e12f695e21ca63b302c9217fc98aab Reviewed-by: Dimitrios Apostolou <jimis@qt.io>
99 lines
2.9 KiB
Bash
Executable File
99 lines
2.9 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (C) 2019 The Qt Company Ltd.
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# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
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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="$2"
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if command -v curl >/dev/null
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then
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curl --fail -L --retry 5 --retry-delay 5 -o "$targetFile" "$url"
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else
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wget --tries 5 -O "$targetFile" "$url"
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fi
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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 ;;
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esac | cut -d ' ' -f 1`
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if [ -z $hash ] || [ ! "$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 [ -z "$4" ]
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then
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# defaults to the last component of $url
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targetFile="${url/*\//}"
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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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