54 lines
1.8 KiB
Bash
54 lines
1.8 KiB
Bash
#!/usr/bin/env bash
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# Copyright © 2012-2026 ScriptFanix
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# A copy of the GNU General Public License v3 is includded in the LICENSE file
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# at the root of the project.
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# Current schema version this AtOM binary understands
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currentdbversion=8
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checkDatabaseVersion() {
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local dbversion
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# Try to read the stored version from the 'atom' metadata table
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if dbversion=$(Select atom version <<<"\"1\" = 1")
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then
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if (( dbversion == currentdbversion ))
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then
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return 0 # Already up to date
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elif (( dbversion < currentdbversion ))
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then
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# Run sequential upgrade functions until we reach
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# `$currentdbversion`
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until (( dbversion == currentdbversion ))
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do
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# Dynamically calls e.g. upgradedatabase_3_4
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upgradedatabase_${dbversion}_$((dbversion+1))
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# After each upgrade, re-read the version from
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# the database to ensure it was updated
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# correctly
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dbversion=$(Select atom version <<<"\"1\" = 1")
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done
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else
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# DB was created by a newer AtOM; we can't run and
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# ensure consistency
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echo "Database schema version $dbversion is" \
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"higher thanthat of this version of" \
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"AtOM ($currentdbversion). Bailing out." >&2
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exit $EDBVERSION
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fi
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else
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# No version row found: this is a database from very early
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# drafts
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# This is stupid but nobody is running with DB schema v0 anyway
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Insert atom 1 <<<"version $currentdbversion"
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fi
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}
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