Script to verify Zoom version

app/check.zoom.update

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+#!/bin/sh
+# Purpose {{{
+## Create a temp file (to monitor) if an upgrade is available for Zoom client
+## from official website − https://zoom.us/download
+## It's based on .deb package installation to check the current version.
+## It can also compare the current available version in APT repositories
+##   if "repo" is given as first argument.
+## How-to use {{{
+### 1. Create a cron job, eg :
+#00 20 * * * root /opt/repos/ipr.scripts/app/check.zoom.update
+### 2-1 Create a cron job to compare the version available in an APT repository :
+#00 20 * * * root /opt/repos/ipr.scripts/app/check.zoom.update repo
+### 2. Monitor the temp file : /tmp/.zoom.upgrade
+# Or enable MAILTO in cronjob and edit the script to print a message.
+# Or send a mail.
+# …
+## }}}
+
+## Inspired by https://github.com/pazepaze/zoom-autoupdater/blob/master/autoupdate-zoom.sh
+# }}}
+
+# Expect maximum 1 argument {{{
+if [ $# -gt 1 ]
+then
+	cat << HELP
+
+check.zoom.update    --
+Compare current version of an installed Zoom client and the last available.
+
+EXAMPLE :
+    - Compare the current version installed from .deb file
+        check.zoom.update
+
+    - Compare the current version from apt's repository
+        check.zoom.update repo
+
+HELP
+
+	exit 1
+fi
+# }}}
+
+# Vars {{{
+DEBUG=1
+
+if [ $# -eq 1 ] && [ "${1}" = "repo" ]  ## If repository's version should be compared
+then
+	zoom_current_version=$(apt-cache policy -- zoom | awk '/Candidate:/ {print $2}' | sed 's/.:\(.*\)-.*/\1/')
+else
+	zoom_current_version=$(dpkg --list -- zoom | awk '/^ii *zoom/ {print $3}' | sed 's/.:\(.*\)-.*/\1/')
+fi
+
+zoom_new_version=$(curl --silent 'https://zoom.us/support/download' --header 'User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36' | grep "class=\"linux-ver-text\"" | sed -e 's/.*Version \(.*\)<.*/\1/')
+zoom_new_version_major=$(echo "${zoom_new_version}" | sed -e 's/\([^\.]\+\.[^\.]\+\).*/\1/')
+zoom_new_version_minor=$(echo "${zoom_new_version}" | sed -e 's/[^\(]\+(\(.*\)).*/\1/')
+
+zoom_new_version_file="/tmp/.zoom.upgrade"
+# }}}
+
+# Check if the current version is the last one {{{
+if [ "${zoom_current_version}" != "${zoom_new_version_major}.${zoom_new_version_minor}" ]; then
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — Current version (${zoom_current_version}) and new one (${zoom_new_version_major}.${zoom_new_version_minor}) seems to be different."
+
+	## Create a temp file to monitor
+	touch -- "${zoom_new_version_file}"
+	printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for Zoom client (current : ${zoom_current_version}) : ${zoom_new_version}." >> "${zoom_new_version_file}"
+
+else
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — The current version is up-to-date."
+	rm -f -- "${zoom_new_version_file}"
+fi
+# }}}
+
+exit 0