mirror of
https://github.com/usememos/memos.git
synced 2024-12-23 19:21:57 +03:00
244 lines
7.1 KiB
Go
244 lines
7.1 KiB
Go
package db
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
"embed"
|
|
"errors"
|
|
"fmt"
|
|
"io/fs"
|
|
"os"
|
|
"regexp"
|
|
"sort"
|
|
"time"
|
|
|
|
"github.com/usememos/memos/server/profile"
|
|
"github.com/usememos/memos/server/version"
|
|
)
|
|
|
|
//go:embed migration
|
|
var migrationFS embed.FS
|
|
|
|
//go:embed seed
|
|
var seedFS embed.FS
|
|
|
|
type DB struct {
|
|
// sqlite db connection instance
|
|
DBInstance *sql.DB
|
|
profile *profile.Profile
|
|
}
|
|
|
|
// NewDB returns a new instance of DB associated with the given datasource name.
|
|
func NewDB(profile *profile.Profile) *DB {
|
|
db := &DB{
|
|
profile: profile,
|
|
}
|
|
return db
|
|
}
|
|
|
|
func (db *DB) Open(ctx context.Context) (err error) {
|
|
// Ensure a DSN is set before attempting to open the database.
|
|
if db.profile.DSN == "" {
|
|
return fmt.Errorf("dsn required")
|
|
}
|
|
|
|
// Connect to the database without foreign_key.
|
|
sqliteDB, err := sql.Open("sqlite3", db.profile.DSN+"?cache=shared&_foreign_keys=0&_journal_mode=WAL")
|
|
if err != nil {
|
|
return fmt.Errorf("failed to open db with dsn: %s, err: %w", db.profile.DSN, err)
|
|
}
|
|
db.DBInstance = sqliteDB
|
|
|
|
if db.profile.Mode == "dev" {
|
|
// In dev mode, we should migrate and seed the database.
|
|
if _, err := os.Stat(db.profile.DSN); errors.Is(err, os.ErrNotExist) {
|
|
if err := db.applyLatestSchema(ctx); err != nil {
|
|
return fmt.Errorf("failed to apply latest schema: %w", err)
|
|
}
|
|
if err := db.seed(ctx); err != nil {
|
|
return fmt.Errorf("failed to seed: %w", err)
|
|
}
|
|
}
|
|
} else {
|
|
// If db file not exists, we should migrate the database.
|
|
if _, err := os.Stat(db.profile.DSN); errors.Is(err, os.ErrNotExist) {
|
|
if err := db.applyLatestSchema(ctx); err != nil {
|
|
return fmt.Errorf("failed to apply latest schema: %w", err)
|
|
}
|
|
}
|
|
|
|
currentVersion := version.GetCurrentVersion(db.profile.Mode)
|
|
migrationHistoryList, err := db.FindMigrationHistoryList(ctx, &MigrationHistoryFind{})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to find migration history, err: %w", err)
|
|
}
|
|
if len(migrationHistoryList) == 0 {
|
|
_, err := db.UpsertMigrationHistory(ctx, &MigrationHistoryUpsert{
|
|
Version: currentVersion,
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to upsert migration history, err: %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
migrationHistoryVersionList := []string{}
|
|
for _, migrationHistory := range migrationHistoryList {
|
|
migrationHistoryVersionList = append(migrationHistoryVersionList, migrationHistory.Version)
|
|
}
|
|
sort.Sort(version.SortVersion(migrationHistoryVersionList))
|
|
latestMigrationHistoryVersion := migrationHistoryVersionList[len(migrationHistoryVersionList)-1]
|
|
|
|
if version.IsVersionGreaterThan(version.GetSchemaVersion(currentVersion), latestMigrationHistoryVersion) {
|
|
minorVersionList := getMinorVersionList()
|
|
|
|
// backup the raw database file before migration
|
|
rawBytes, err := os.ReadFile(db.profile.DSN)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read raw database file, err: %w", err)
|
|
}
|
|
backupDBFilePath := fmt.Sprintf("%s/memos_%s_%d_backup.db", db.profile.Data, db.profile.Version, time.Now().Unix())
|
|
if err := os.WriteFile(backupDBFilePath, rawBytes, 0644); err != nil {
|
|
return fmt.Errorf("failed to write raw database file, err: %w", err)
|
|
}
|
|
println("succeed to copy a backup database file")
|
|
|
|
println("start migrate")
|
|
for _, minorVersion := range minorVersionList {
|
|
normalizedVersion := minorVersion + ".0"
|
|
if version.IsVersionGreaterThan(normalizedVersion, latestMigrationHistoryVersion) && version.IsVersionGreaterOrEqualThan(currentVersion, normalizedVersion) {
|
|
println("applying migration for", normalizedVersion)
|
|
if err := db.applyMigrationForMinorVersion(ctx, minorVersion); err != nil {
|
|
return fmt.Errorf("failed to apply minor version migration: %w", err)
|
|
}
|
|
}
|
|
}
|
|
println("end migrate")
|
|
|
|
// remove the created backup db file after migrate succeed
|
|
if err := os.Remove(backupDBFilePath); err != nil {
|
|
println(fmt.Sprintf("Failed to remove temp database file, err %v", err))
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
const (
|
|
latestSchemaFileName = "LATEST__SCHEMA.sql"
|
|
)
|
|
|
|
func (db *DB) applyLatestSchema(ctx context.Context) error {
|
|
latestSchemaPath := fmt.Sprintf("%s/%s/%s", "migration", db.profile.Mode, latestSchemaFileName)
|
|
buf, err := migrationFS.ReadFile(latestSchemaPath)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read latest schema %q, error %w", latestSchemaPath, err)
|
|
}
|
|
stmt := string(buf)
|
|
if err := db.execute(ctx, stmt); err != nil {
|
|
return fmt.Errorf("migrate error: statement:%s err=%w", stmt, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (db *DB) applyMigrationForMinorVersion(ctx context.Context, minorVersion string) error {
|
|
filenames, err := fs.Glob(migrationFS, fmt.Sprintf("%s/%s/*.sql", "migration/prod", minorVersion))
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read ddl files, err: %w", err)
|
|
}
|
|
|
|
sort.Strings(filenames)
|
|
migrationStmt := ""
|
|
|
|
// Loop over all migration files and execute them in order.
|
|
for _, filename := range filenames {
|
|
buf, err := migrationFS.ReadFile(filename)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read minor version migration file, filename=%s err=%w", filename, err)
|
|
}
|
|
stmt := string(buf)
|
|
migrationStmt += stmt
|
|
if err := db.execute(ctx, stmt); err != nil {
|
|
return fmt.Errorf("migrate error: statement:%s err=%w", stmt, err)
|
|
}
|
|
}
|
|
|
|
tx, err := db.DBInstance.Begin()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer tx.Rollback()
|
|
|
|
// upsert the newest version to migration_history
|
|
version := minorVersion + ".0"
|
|
if _, err = upsertMigrationHistory(ctx, tx, &MigrationHistoryUpsert{
|
|
Version: version,
|
|
}); err != nil {
|
|
return fmt.Errorf("failed to upsert migration history with version: %s, err: %w", version, err)
|
|
}
|
|
|
|
return tx.Commit()
|
|
}
|
|
|
|
func (db *DB) seed(ctx context.Context) error {
|
|
filenames, err := fs.Glob(seedFS, fmt.Sprintf("%s/*.sql", "seed"))
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read seed files, err: %w", err)
|
|
}
|
|
|
|
sort.Strings(filenames)
|
|
|
|
// Loop over all seed files and execute them in order.
|
|
for _, filename := range filenames {
|
|
buf, err := seedFS.ReadFile(filename)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read seed file, filename=%s err=%w", filename, err)
|
|
}
|
|
stmt := string(buf)
|
|
if err := db.execute(ctx, stmt); err != nil {
|
|
return fmt.Errorf("seed error: statement:%s err=%w", stmt, err)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// execute runs a single SQL statement within a transaction.
|
|
func (db *DB) execute(ctx context.Context, stmt string) error {
|
|
tx, err := db.DBInstance.Begin()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer tx.Rollback()
|
|
|
|
if _, err := tx.ExecContext(ctx, stmt); err != nil {
|
|
return fmt.Errorf("failed to execute statement, err: %w", err)
|
|
}
|
|
|
|
return tx.Commit()
|
|
}
|
|
|
|
// minorDirRegexp is a regular expression for minor version directory.
|
|
var minorDirRegexp = regexp.MustCompile(`^migration/prod/[0-9]+\.[0-9]+$`)
|
|
|
|
func getMinorVersionList() []string {
|
|
minorVersionList := []string{}
|
|
|
|
if err := fs.WalkDir(migrationFS, "migration", func(path string, file fs.DirEntry, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if file.IsDir() && minorDirRegexp.MatchString(path) {
|
|
minorVersionList = append(minorVersionList, file.Name())
|
|
}
|
|
|
|
return nil
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
sort.Sort(version.SortVersion(minorVersionList))
|
|
|
|
return minorVersionList
|
|
}
|