32 lines
689 B
Bash
32 lines
689 B
Bash
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#!/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 hxnormalize hxselect grep sed; 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 [ $count -ne 0 ]; then
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exit 1
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fi
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# upstream URL
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UPSTREAM_URL="https://www.oilshell.org/release/latest/"
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# options to pass to cURL, including custom user agent
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USER_AGENT="oil-version-checker/1.0 george@rawlinson.net.nz"
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CURL_OPTS=(--silent --user-agent "$USER_AGENT")
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curl "${CURL_OPTS[@]}" "$UPSTREAM_URL" | \
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hxnormalize -x | \
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hxselect -c 'a' -s '\n' | \
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grep '.tar.gz' | \
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sed -e "s/^oil-//" -e "s/\.tar.gz$//"
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exit 0
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