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31 lines
976 B
Bash
31 lines
976 B
Bash
#!/usr/bin/env bash
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set -o errexit
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CWD=$(dirname -- "$0")
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OUT_DIR="${CWD}/images"
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URL=${URL:-"https://github.com/pwndbg/linux-exploit-dev-env/releases/latest/download"}
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mkdir -p "${OUT_DIR}"
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download() {
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local file="$1"
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hash_old=$(grep "${file}" "${OUT_DIR}/hashsums.txt.old" || true)
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hash_new=$(grep "${file}" "${OUT_DIR}/hashsums.txt")
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# only download file if it doesn't exist or its hashsum has changed
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if [ ! -f "${OUT_DIR}/${file}" ] || [ "${hash_new}" != "${hash_old}" ]; then
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wget --no-verbose --show-progress --progress=bar:force:noscroll "${URL}/${file}" -O "${OUT_DIR}/${file}"
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fi
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}
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if [ -f "${OUT_DIR}/hashsums.txt" ]; then
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mv -f "${OUT_DIR}/hashsums.txt" "${OUT_DIR}/hashsums.txt.old"
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fi
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wget --no-verbose --show-progress --progress=bar:force:noscroll "${URL}/hashsums.txt" -O "${OUT_DIR}/hashsums.txt"
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while read -r hash file; do
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echo "Downloading ${file}..."
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download "${file}"
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done < "${OUT_DIR}/hashsums.txt"
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