Script to check if installed Wallabag is uptodate

github/check.wallabag.update

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+#!/bin/sh
+# Purpose {{{
+## Create a temp file (to monitor) if an upgrade is available for Wallabag
+## project on Github.
+## It based on the wallabag's root directory to get the current version and
+## supposed to be install from source (github).
+## How-to use {{{
+### 1. Needs releasetags script, in the same directory
+### cf. https://git.ipr.univ-rennes1.fr/cellinfo/scripts/src/master/github/releasetags
+# wget https://git.ipr.univ-rennes1.fr/cellinfo/scripts/raw/master/github/releasetags
+### 2. Create a cron job with Wallabag directory as first argument, eg.
+#00 20 * * * root /opt/repos/ipr.scripts/github/check.wallabag.update /var/www/wallabag
+### 3. Monitor the temp file : /tmp/.github.wallabag.upgrade
+# Or enable MAILTO in cronjob and edit the script to print a message.
+# Or send a mail.
+# …
+## }}}
+# }}}
+
+# Expect 1 argument {{{
+if [ $# -ne 1 ]
+then
+	cat << HELP
+
+check.wallabag.update  --
+Compare current version of an installed Wallabag and the last available.
+
+EXAMPLE :
+    - Compare the current version installed in /var/www/bag.domain.tld
+        check.wallabag.update /var/www/bag.domain.tld
+
+HELP
+
+	exit 1
+# }}}
+
+fi
+
+# Vars {{{
+DEBUG=1
+
+script_wd=$(dirname "${0}")
+
+wb_install_dir="${1}"
+wb_current_version=$(cd "${wb_install_dir}" || exit 1 ; git status | head -n1 | cut -d" " -f4 ; cd - > /dev/null || exit 1)
+
+wb_repo_url="https://github.com/wallabag/wallabag"
+wb_new_version=$("${script_wd}"/releasetags "${wb_repo_url}" | head -n1)
+
+wb_new_version_file="/tmp/.github.wallabag.upgrade"
+# }}}
+
+# Check if the current version is the last one {{{
+if [ "${wb_current_version}" != "${wb_new_version}" ]; then
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — Current version (${wb_current_version}) and new one (${wb_new_version}) seems to be different."
+
+	## Create a temp file to monitor
+	touch -- "${wb_new_version_file}"
+	printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for Wallabag : ${wb_new_version}." >> "${wb_new_version_file}"
+
+else
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — The current version is up-to-date."
+	rm -f -- "${wb_new_version_file}"
+fi
+# }}}
+
+exit 0