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68 lines
2.4 KiB
68 lines
2.4 KiB
#!/bin/bash
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set -eu
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set -o pipefail
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# Updating DokuWiki may need to change files in directories which we hold in
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# volumes, e.g. `data` or `conf`. Therefore, we need to make sure these files
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# are there when the container is started, not only when it is created. We do
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# this by keeping track which version we last installed and update as necessary,
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# or fully populate these folders if this is the first run.
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dokudir=/dokuwiki
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verfile=.last-version
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if [ ! -d "$dokudir" ]; then
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echo "DokuWiki does not appear to be installed correctly at: $dokudir." >&2
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exit 1
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fi
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# Unpack a temporary copy
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tmpdir=/tmp/dokuwiki
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mkdir "$tmpdir"
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tar -zxf /dokuwiki.tgz -C "$tmpdir" --strip-components 1
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containerver="$(date -f <(awk '{print $1}' "$tmpdir/VERSION" | tr -d '[:alpha:]') +%s)"
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# Check for downgrade/overwrite parameters
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if [ "$1" = 'downgrade' ]; then downgrade=1; else downgrade=0; fi
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if [ "$1" = 'overwrite' ]; then overwrite=1; else overwrite=0; fi
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if [ "$1" = 'run' ] || [ "$1" = 'downgrade' ] || [ "$1" = 'overwrite' ]; then
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# Check each volume directory in turn
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for d in conf data lib/plugins lib/tpl; do
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if [ -f "$dokudir/$d/$verfile" ]; then
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volumever="$(date -f <(awk '{print $1}' "$dokudir/$d/$verfile" | tr -d '[:alpha:]') +%s)"
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else
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volumever=0
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fi
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if [ "$volumever" -eq "$containerver" ] && [ ! "$overwrite" -eq 1 ]; then
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# Do nothing for equal versions
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continue
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elif [ "$volumever" -lt "$containerver" ] || [ "$downgrade" -eq 1 ] || [ "$overwrite" -eq 1 ]; then
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# Update if the container version is newer than the volume version
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# Or if overridden using `downgrade`
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echo "Migrating $d..."
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cp -r "$tmpdir/$d/"* "$dokudir/$d/"
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cp "$tmpdir/VERSION" "$dokudir/$d/$verfile"
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elif [ "$volumever" -gt "$containerver" ]; then
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# Otherwise print an error message and stop
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cat >&2 <<EOM
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This volume has perviously been used with a newer version of DokuWiki.
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If you want to force a downgrade (at your own risk!), run the \`downgrade\` command:
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docker run ... andreipoe/dokuwiki donwgrade
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EOM
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exit 2
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fi
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done
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# Ensure persmissions are set correctly
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chown -R www-data:www-data "$dokudir"
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# Run the web server
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/usr/sbin/lighttpd -D -f /etc/lighttpd/lighttpd.conf
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else
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# Handle custom commands otherwise
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exec "$@"
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fi
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