38 lines
1.3 KiB
Plaintext
38 lines
1.3 KiB
Plaintext
#!/bin/sh
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# script to update motd when a new WordOps release is available on Debian/Ubuntu
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# the script is added in /etc/update-motd.d
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safe_print() {
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cat "$1" | head -n 10 | tr -d '\000-\011\013\014\016-\037' | cut -c -80
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}
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# Ensure sane defaults
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[ -n "$URL" ] || URL="https://github.com/WordOps/WordOps/releases/latest"
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[ -n "$WAIT" ] || WAIT=5
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[ -n "$CACHE" ] || CACHE="/var/cache/motd-wo"
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# Generate our temp files, clean up when done
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NEWS=$(mktemp) || exit 1
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ERR=$(mktemp) || exit 1
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CLOUD=$(mktemp) || exit 1
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trap "rm -f $NEWS $ERR $CLOUD" HUP INT QUIT ILL TRAP BUS TERM
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if [ -n "$(command -v curl)" ]; then
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LATEST_RELEASE=$(curl -m 5 --retry 3 -sI "$URL" | grep tag | awk -F "/" '{print $8}' 2>&1)
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fi
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if [ -n "$(command -v wo)" ]; then
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CURRENT_RELEASE=$(wo -v 2>&1 | grep v | awk -F " " '{print $2}')
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fi
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if [ -n "$CURRENT_RELEASE" ] && [ -n "$LATEST_RELEASE" ]; then
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if [ "$CURRENT_RELEASE" != "$LATEST_RELEASE" ]; then
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# display message with motd-news on Ubuntu
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echo '*** A new WordOps release is available ***' > "$NEWS" 2> "$ERR"
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echo
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# At most, 10 lines of text, remove control characters, print at most 80 characters per line
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safe_print "$NEWS"
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# Try to update the cache
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safe_print "$NEWS" 2> /dev/null > $CACHE || true
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fi
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fi
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