mirror of
https://github.com/usememos/memos.git
synced 2024-11-17 04:07:30 +08:00
234 lines
7.2 KiB
Go
234 lines
7.2 KiB
Go
package sqlite
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import (
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"context"
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"embed"
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"fmt"
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"io/fs"
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"os"
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"regexp"
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"sort"
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"time"
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"github.com/pkg/errors"
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"github.com/usememos/memos/server/version"
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"github.com/usememos/memos/store"
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)
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//go:embed migration
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var migrationFS embed.FS
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//go:embed seed
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var seedFS embed.FS
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// Migrate applies the latest schema to the database.
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func (d *DB) Migrate(ctx context.Context) error {
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currentVersion := version.GetCurrentVersion(d.profile.Mode)
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if d.profile.Mode == "prod" {
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_, err := os.Stat(d.profile.DSN)
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if err != nil {
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// If db file not exists, we should create a new one with latest schema.
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if errors.Is(err, os.ErrNotExist) {
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if err := d.applyLatestSchema(ctx); err != nil {
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return errors.Wrap(err, "failed to apply latest schema")
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}
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// Upsert the newest version to migration_history.
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if _, err := d.UpsertMigrationHistory(ctx, &store.UpsertMigrationHistory{
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Version: currentVersion,
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}); err != nil {
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return errors.Wrap(err, "failed to upsert migration history")
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}
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} else {
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return errors.Wrap(err, "failed to get db file stat")
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}
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} else {
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// If db file exists, we should check if we need to migrate the database.
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migrationHistoryList, err := d.FindMigrationHistoryList(ctx, &store.FindMigrationHistory{})
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if err != nil {
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return errors.Wrap(err, "failed to find migration history")
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}
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// If no migration history, we should apply the latest version migration and upsert the migration history.
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if len(migrationHistoryList) == 0 {
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minorVersion := version.GetMinorVersion(currentVersion)
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if err := d.applyMigrationForMinorVersion(ctx, minorVersion); err != nil {
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return errors.Wrapf(err, "failed to apply version %s migration", minorVersion)
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}
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_, err := d.UpsertMigrationHistory(ctx, &store.UpsertMigrationHistory{
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Version: currentVersion,
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})
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if err != nil {
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return errors.Wrap(err, "failed to upsert migration history")
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}
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return nil
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}
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migrationHistoryVersionList := []string{}
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for _, migrationHistory := range migrationHistoryList {
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migrationHistoryVersionList = append(migrationHistoryVersionList, migrationHistory.Version)
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}
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sort.Sort(version.SortVersion(migrationHistoryVersionList))
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latestMigrationHistoryVersion := migrationHistoryVersionList[len(migrationHistoryVersionList)-1]
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if version.IsVersionGreaterThan(version.GetSchemaVersion(currentVersion), latestMigrationHistoryVersion) {
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minorVersionList := getMinorVersionList()
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// backup the raw database file before migration
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rawBytes, err := os.ReadFile(d.profile.DSN)
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if err != nil {
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return errors.Wrap(err, "failed to read raw database file")
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}
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backupDBFilePath := fmt.Sprintf("%s/memos_%s_%d_backup.db", d.profile.Data, d.profile.Version, time.Now().Unix())
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if err := os.WriteFile(backupDBFilePath, rawBytes, 0644); err != nil {
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return errors.Wrap(err, "failed to write raw database file")
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}
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println("succeed to copy a backup database file")
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println("start migrate")
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for _, minorVersion := range minorVersionList {
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normalizedVersion := minorVersion + ".0"
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if version.IsVersionGreaterThan(normalizedVersion, latestMigrationHistoryVersion) && version.IsVersionGreaterOrEqualThan(currentVersion, normalizedVersion) {
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println("applying migration for", normalizedVersion)
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if err := d.applyMigrationForMinorVersion(ctx, minorVersion); err != nil {
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return errors.Wrap(err, "failed to apply minor version migration")
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}
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}
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}
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println("end migrate")
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// remove the created backup db file after migrate succeed
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if err := os.Remove(backupDBFilePath); err != nil {
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println(fmt.Sprintf("Failed to remove temp database file, err %v", err))
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}
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}
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}
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} else {
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// In non-prod mode, we should always migrate the database.
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if _, err := os.Stat(d.profile.DSN); errors.Is(err, os.ErrNotExist) {
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if err := d.applyLatestSchema(ctx); err != nil {
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return errors.Wrap(err, "failed to apply latest schema")
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}
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// In demo mode, we should seed the database.
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if d.profile.Mode == "demo" {
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if err := d.seed(ctx); err != nil {
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return errors.Wrap(err, "failed to seed")
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}
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}
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}
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}
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return nil
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}
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const (
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latestSchemaFileName = "LATEST__SCHEMA.sql"
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)
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func (d *DB) applyLatestSchema(ctx context.Context) error {
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schemaMode := "dev"
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if d.profile.Mode == "prod" {
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schemaMode = "prod"
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}
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latestSchemaPath := fmt.Sprintf("migration/%s/%s", schemaMode, latestSchemaFileName)
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buf, err := migrationFS.ReadFile(latestSchemaPath)
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if err != nil {
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return errors.Wrapf(err, "failed to read latest schema %q", latestSchemaPath)
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}
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stmt := string(buf)
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if err := d.execute(ctx, stmt); err != nil {
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return errors.Wrapf(err, "migrate error: %s", stmt)
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}
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return nil
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}
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func (d *DB) applyMigrationForMinorVersion(ctx context.Context, minorVersion string) error {
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filenames, err := fs.Glob(migrationFS, fmt.Sprintf("%s/%s/*.sql", "migration/prod", minorVersion))
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if err != nil {
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return errors.Wrap(err, "failed to read ddl files")
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}
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sort.Strings(filenames)
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migrationStmt := ""
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// Loop over all migration files and execute them in order.
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for _, filename := range filenames {
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buf, err := migrationFS.ReadFile(filename)
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if err != nil {
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return errors.Wrapf(err, "failed to read minor version migration file, filename=%s", filename)
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}
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stmt := string(buf)
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migrationStmt += stmt
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if err := d.execute(ctx, stmt); err != nil {
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return errors.Wrapf(err, "migrate error: %s", stmt)
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}
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}
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// Upsert the newest version to migration_history.
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version := minorVersion + ".0"
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if _, err = d.UpsertMigrationHistory(ctx, &store.UpsertMigrationHistory{
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Version: version,
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}); err != nil {
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return errors.Wrapf(err, "failed to upsert migration history with version: %s", version)
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}
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return nil
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}
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func (d *DB) seed(ctx context.Context) error {
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filenames, err := fs.Glob(seedFS, fmt.Sprintf("%s/*.sql", "seed"))
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if err != nil {
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return errors.Wrap(err, "failed to read seed files")
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}
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sort.Strings(filenames)
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// Loop over all seed files and execute them in order.
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for _, filename := range filenames {
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buf, err := seedFS.ReadFile(filename)
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if err != nil {
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return errors.Wrapf(err, "failed to read seed file, filename=%s", filename)
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}
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stmt := string(buf)
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if err := d.execute(ctx, stmt); err != nil {
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return errors.Wrapf(err, "seed error: %s", stmt)
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}
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}
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return nil
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}
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// execute runs a single SQL statement within a transaction.
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func (d *DB) execute(ctx context.Context, stmt string) error {
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tx, err := d.db.Begin()
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if err != nil {
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return err
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}
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defer tx.Rollback()
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if _, err := tx.ExecContext(ctx, stmt); err != nil {
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return errors.Wrap(err, "failed to execute statement")
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}
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return tx.Commit()
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}
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// minorDirRegexp is a regular expression for minor version directory.
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var minorDirRegexp = regexp.MustCompile(`^migration/prod/[0-9]+\.[0-9]+$`)
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func getMinorVersionList() []string {
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minorVersionList := []string{}
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if err := fs.WalkDir(migrationFS, "migration", func(path string, file fs.DirEntry, err error) error {
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if err != nil {
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return err
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}
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if file.IsDir() && minorDirRegexp.MatchString(path) {
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minorVersionList = append(minorVersionList, file.Name())
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}
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return nil
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}); err != nil {
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panic(err)
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}
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sort.Sort(version.SortVersion(minorVersionList))
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return minorVersionList
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}
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