weichenandCursor
5c26a86331
ci / vet-and-test (pull_request) Successful in 47s
Why: a rollback can only be safe when the candidate says which schema it will migrate to and whether older binaries can still read that schema. A new migration that forgets to register that fact must fail the test. Evidence: go test ./internal/store/ ./pkg/identity/ -run 'TestMigrationCompat|TestCapabilities' passed. Impact: version --json and identity capabilities include schema.target and schema.compatFloor. Every migration version is listed in migrationBreaksOldReaders. Current versions do not break old readers, so the floor stays 0. Refs: recovery plan r3.1 D2 Co-authored-by: Cursor <cursoragent@cursor.com>
50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package store
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// migrationBreaksOldReaders 登记每个迁移版本落地后，schema.target 更低的旧制品
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// 还能不能读这个库。新增迁移漏登记时 TestMigrationCompatRegistered 失败。
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// true 会抬高 SchemaCompatFloor：候选若要把库迁过该版本，而旧制品的 target
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// 低于该下限，切换必须在停旧服务前拒绝，除非走已确认的 forward-only 迁移。
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var migrationBreaksOldReaders = map[int]bool{
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1: false,
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2: false,
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3: false,
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4: false,
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5: false,
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6: false,
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7: false,
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8: false,
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9: false,
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10: false,
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11: false,
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12: false,
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13: false,
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14: false,
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15: false,
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16: false,
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17: false,
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18: false,
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19: false,
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20: false,
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21: false,
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22: false,
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23: false,
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24: false,
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25: false,
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26: false,
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27: false,
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}
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// SchemaTarget 是本二进制会迁移到的 schema 版本。
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func SchemaTarget() int { return latestMigrationVersion() }
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// SchemaCompatFloor 是旧制品仍能读取的最高破坏性版本。0 表示当前全部迁移都不破坏旧读。
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func SchemaCompatFloor() int {
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floor := 0
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for version, breaks := range migrationBreaksOldReaders {
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if breaks && version > floor {
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floor = version
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}
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}
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return floor
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}
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