35 lines
705 B
Bash
35 lines
705 B
Bash
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#!/usr/bin/bash
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set -e
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# check dependencies
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count=0
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for dependency in curl tr cut grep sed sort tail; do
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if [ ! -x "$(command -v $dependency)" ]; then
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echo "$dependency missing"
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count=$((count+1))
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fi
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done
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# exit script if any dependencies missing
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if [ $count -ne 0 ]; then
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exit 1
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fi
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# upstream URL
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UPSTREAM_URL="ftp://ftp.gnu.org/gnu/time/"
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# options to pass to cURL, including custom user agent
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USER_AGENT="time-version-checker/1.0 george@rawlinson.net.nz"
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CURL_OPTS=(--ftp-pasv --silent --user-agent "$USER_AGENT")
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curl "${CURL_OPTS[@]}" "$UPSTREAM_URL" \
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| tr -s ' ' \
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| cut -d ' ' -f 9 \
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| grep ".tar.gz$" \
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| sort -n \
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| tail -n 1 \
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| sed -e "s/^time-//" -e "s/.tar.gz$//"
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exit 0
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