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60 lines
1.4 KiB
Bash
60 lines
1.4 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2024-08-28 23:01:46 +0200 (Wed, 28 Aug 2024)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/../lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Downloads a given URL file using wget or curl
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First tries wget if available with continuation and noclobber support
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Alternatively falls back to using curl with atomic tmp and move to not cause
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race conditions with files that are in frequent use
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Designed to be called from adjacent download_*.sh scripts to deduplicate code
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="<url>"
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help_usage "$@"
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num_args 1 "$@"
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download_url="$1"
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timestamp "Downloading: $download_url"
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echo >&2
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filename="${download_url##*/}"
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if type -P wget &>/dev/null; then
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wget -cO "$filename" "$download_url"
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else
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tmpfile="$(mktemp)"
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curl --fail "$download_url" > "$tmpfile"
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unalias mv &>/dev/null || :
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mv -fv "$tmpfile" "$filename"
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fi
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timestamp "Download complete: $filename"
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