mirror of
https://github.com/clearlinux/graphene.git
synced 2026-08-22 05:56:23 +00:00
Jörg Thalheim
82caa0683d
Unlike /usr/bin/env which is a Posix standard, there is no guarentee that /bin/bash exists. This is the case for operating systems such as FreeBSD, NixOS and Guix. By using /usr/bin/env we also give the user the option to provide their own bash in a different path by setting the $PATH environemnt variable. Distributions usually provide their own packaging wrappers to fixup shebangs upon installation, however those are not convienent to use when developing in the source tree. See also other upstream discussions about the topic: - https://github.com/systemd/systemd/pull/5816
79 lines
1.9 KiB
Bash
Executable File
79 lines
1.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -eu -o pipefail
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declare -a urls
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usage() {
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echo "Usage: download --url https://example.org/test --url https://mirror.example/blah --output test.tar --sha256 1234..abc"
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exit "${1:-0}"
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}
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while [ $# -gt 0 ]; do
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case "$1" in
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--url)
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urls+=("$2")
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shift
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;;
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--output)
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output="$2"
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shift
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;;
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--sha256)
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sha256="$2"
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shift
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;;
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--help|-h)
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usage
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;;
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*)
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usage 1
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;;
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esac
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shift
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done
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if [ -z "${output:-}" ] || [ -z "${sha256:-}" ] || [ -z "${urls[*]}" ]; then
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usage 1
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fi
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if [ -n "${DL_CACHE:-}" ]; then
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if [ -f "$DL_CACHE/$sha256" ]; then
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echo "download: Found '$output' (${sha256:0:8}...) in cache."
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cp "$DL_CACHE/$sha256" "$output"
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exit 0
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fi
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fi
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if [ "${DL_OFFLINE:-}" == "true" ]; then
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echo "download: ERROR: File '$output' (${sha256:0:8}...) not found in cache and offline mode is active!"
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exit 1
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fi
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tmpd="$(mktemp -d -p "${DL_CACHE:-.}")"
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cleanup() {
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rm -rf "$tmpd"
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}
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trap cleanup EXIT
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for url in "${urls[@]}"; do
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echo "download: Trying to fetch $url"
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wget --timeout=10 -O "$tmpd/unverified" "$url" || true
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sha256_received="$(sha256sum "$tmpd/unverified" | cut -d ' ' -f 1)"
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if [ "$sha256" != "$sha256_received" ]; then
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echo "download: WARNING: Hash mismatch: Expected $sha256 but received $sha256_received"
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continue
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fi
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echo "download: Fetched '$output' (${sha256:0:8}...) successfully."
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if [ -n "${DL_CACHE:-}" ]; then
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mv "$tmpd/unverified" "$DL_CACHE/$sha256"
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cp "$DL_CACHE/$sha256" "$output"
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exit 0
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fi
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mv "$tmpd/unverified" "$output"
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exit 0
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done
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echo "download: ERROR: Failed to download '$output' (${sha256:0:8}...)! No URLs left to try."
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exit 1
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