openresty/util/get-tarball

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#!/bin/bash
root=$(readlink -f -- "$(dirname -- "$0")/..")
work=$root/work
if [ ! -d $work ]; then
mkdir $work || exit 1
fi
url=$1
outfile=$3
cachefile=$work/$outfile
if [ -s $cachefile ]; then
cp $work/$outfile $outfile || exit 1
else
wget --no-check-certificate $1 -O $3 || exit 1
if [ $? == 0 ]; then
cp $3 $work/ || exit 1
fi
fi