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44 lines
1.6 KiB
TypeScript
44 lines
1.6 KiB
TypeScript
/*
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* Copyright (C) 2024-present Puter Technologies Inc.
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*
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* This file is part of Puter.
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*
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* Puter is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/**
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* Comparator for migration filenames named `<engine>_mig_<N>.sql`.
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*
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* Existing MySQL files use unpadded integers, so lexical sorting places
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* `*_mig_10.sql` before `*_mig_2.sql`. Pull the trailing integer out and sort
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* numerically. Anything that does not match the `_<digits>.sql` shape falls
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* back to lexical comparison and sorts after numbered files.
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*/
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export const compareMigrationFilenames = (a: string, b: string): number => {
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const numericIndex = (name: string): number => {
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const m = /_(\d+)\.sql$/.exec(name);
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return m ? Number.parseInt(m[1], 10) : Number.NaN;
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};
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const na = numericIndex(a);
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const nb = numericIndex(b);
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if (Number.isFinite(na) && Number.isFinite(nb)) {
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if (na !== nb) return na - nb;
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} else if (Number.isFinite(na)) {
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return -1;
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} else if (Number.isFinite(nb)) {
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return 1;
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}
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return a.localeCompare(b);
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};
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